Added logging to Voter-Registry

Instead of using ThreadedBulletinBoardClient.
The test have been changed to use LocalBulletinBoardClient.

.gitignore

@@ -1,3 +1,7 @@
+/SQLiteDBTest.db
+/Wombat Code And Documentation Conventions
+/bulletin-board-server/trace.db/h2datasource.trace.db
+/bulletin-board-server/SQLiteDBTest.db
 .gradle
 .idea
 build
@@ -13,26 +17,4 @@ out
 *.prefs
 *.project
 *.classpath
-*.db
+bulletin-board-server/local-instances/meerkat.db
-*.sql
-.arcconfig
-/meerkat_election_params_tempfile.dat
-/meerkat_booth_system_messages.dat
-local.properties
-# Angular junk
-*/tmp
-*/dist
-*/out-tsc
-*/node_modules
-*/e2e/*.js
-*/e2e/*.map
-*/.sass-cache
-*/connect.lock
-*/coverage
-*/libpeerconnection.log
-npm-debug.log
-testem.log
-*/typings
-bundle.js
-bundle.d.ts
-

Wombat Code And Documentation Conventions

@@ -1,10 +0,0 @@
-This file describes Wombat Code & Documentation Conventions:
-
-Code Conventions:
-    *   Code-       The good old classic java code conventions
-                    camelCase convention, constants should be capital letters with underscore etc...
-
-Documentation Conventions:
-    *   Comments-   The good old classic java code documentation, Block Comments (to describe
-                    method/class/interface etc...) // comments too describe complex code
-                    (only if the code block complicated)

android-scanner/build.gradle

@@ -1,82 +0,0 @@
-buildscript {
-    repositories {
-        jcenter()
-    }
-    dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
-
-        // NOTE: Do not place your application dependencies here; they belong
-        // in the individual module build.gradle files
-    }
-}
-
-
-apply plugin: 'com.android.application'
-
-android {
-    compileSdkVersion 26
-    buildToolsVersion "26.0.0"
-    defaultConfig {
-        applicationId "com.meerkat.laura.fakescannerapp"
-        minSdkVersion 14
-        targetSdkVersion 26
-        versionCode 1
-        versionName "1.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
-
-        // Enabling multidex support.
-        multiDexEnabled true
-        vectorDrawables.useSupportLibrary = true
-    }
-
-
-
-    buildTypes {
-        debug {
-            debuggable true
-        }
-        release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
-        }
-    }
-}
-
-
-configurations.all {
-    resolutionStrategy.dependencySubstitution {
-        // Avoid Android compilation error caused by two different javax.inject dependencies.
-        substitute module('org.glassfish.hk2.external:javax.inject:2.4.0-b34') with module('javax.inject:javax.inject:1')
-    }
-
-    // Exclude non-android logback modules
-    exclude group:"ch.qos.logback", module:"logback-core"
-    exclude group:"ch.qos.logback", module:"logback-classic"
-}
-
-
-dependencies {
-//    compile fileTree(dir: 'libs', include: ['*.jar'])
-
-    compile project(':meerkat-common')
-    compile project(':scanner-api-common')
-
-    compile 'com.android.support:appcompat-v7:26.0.+'
-    compile 'com.google.protobuf:protobuf-java:3.+'
-    compile 'com.android.support:support-v4:26.0.+'
-    compile 'com.android.support:support-vector-drawable:26.0.+'
-    testCompile 'junit:junit:4.12'
-
-    // Android logging
-    compile 'com.github.tony19:logback-android-core:1.1.1-6'
-    compile('com.github.tony19:logback-android-classic:1.1.1-6') {
-        // workaround issue #73
-        exclude group: 'com.google.android', module: 'android'
-    }
-}
-
-repositories {
-    mavenLocal()
-
-    jcenter()
-}

android-scanner/gradlew

@@ -1 +0,0 @@
-../gradlew

android-scanner/lint.xml

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<lint>
-    <issue id="InvalidPackage">
-        <!-- Ignore javax.mail from logback https://github.com/tony19/logback-android/issues/140-->
-        <ignore regexp="javax.mail"/>
-    </issue>
-</lint>

android-scanner/src/androidTest/java/com/meerkat/laura/fakescannerapp/ApplicationTest.java

@@ -1,13 +0,0 @@
-package com.meerkat.laura.fakescannerapp;
-
-import android.app.Application;
-import android.test.ApplicationTestCase;
-
-/**
- * <a href="http://d.android.com/tools/testing/testing_android.html">Testing Fundamentals</a>
- */
-public class ApplicationTest extends ApplicationTestCase<Application> {
-    public ApplicationTest() {
-        super(Application.class);
-    }
-}

android-scanner/src/main/AndroidManifest.xml

@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          package="com.meerkat.laura.fakescannerapp">
-
-    <uses-permission android:name="android.permission.INTERNET"/>
-    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
-    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
-
-    <application
-            android:allowBackup="true"
-            android:icon="@mipmap/ic_launcher"
-            android:label="@string/app_name"
-            android:supportsRtl="true"
-            android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
-
-                <category android:name="android.intent.category.LAUNCHER"/>
-            </intent-filter>
-        </activity>
-        <activity
-                android:name=".SettingsActivity"
-                android:label="@string/title_activity_settings">
-        </activity>
-    </application>
-
-</manifest>

android-scanner/src/main/assets/logback.xml

@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<configuration>
-    <appender name="logcat" class="ch.qos.logback.classic.android.LogcatAppender">
-        <tagEncoder>
-            <pattern>%logger{12}</pattern>
-        </tagEncoder>
-        <encoder>
-            <pattern>[%-20thread] %msg</pattern>
-        </encoder>
-    </appender>
-
-    <root level="DEBUG">
-        <appender-ref ref="logcat" />
-    </root>
-</configuration>

android-scanner/src/main/java/com/google/zxing/integration/android/IntentIntegrator.java

@@ -1,508 +0,0 @@
-package com.google.zxing.integration.android;
-
-/*
- * Copyright 2009 ZXing authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import android.app.Activity;
-import android.app.AlertDialog;
-import android.app.Fragment;
-import android.content.ActivityNotFoundException;
-import android.content.DialogInterface;
-import android.content.Intent;
-import android.content.pm.PackageManager;
-import android.content.pm.ResolveInfo;
-import android.net.Uri;
-import android.os.Bundle;
-import android.util.Log;
-
-/**
- * <p>A utility class which helps ease integration with Barcode Scanner via {@link Intent}s. This is a simple
- * way to invoke barcode scanning and receive the result, without any need to integrate, modify, or learn the
- * project's source code.</p>
- *
- * <h2>Initiating a barcode scan</h2>
- *
- * <p>To integrate, create an instance of {@code IntentIntegrator} and call {@link #initiateScan()} and wait
- * for the result in your app.</p>
- *
- * <p>It does require that the Barcode Scanner (or work-alike) application is installed. The
- * {@link #initiateScan()} method will prompt the user to download the application, if needed.</p>
- *
- * <p>There are a few steps to using this integration. First, your {@link Activity} must implement
- * the method {@link Activity#onActivityResult(int, int, Intent)} and include a line of code like this:</p>
- *
- * <pre>{@code
- * public void onActivityResult(int requestCode, int resultCode, Intent intent) {
- *   IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
- *   if (scanResult != null) {
- *     // handle scan result
- *   }
- *   // else continue with any other code you need in the method
- *   ...
- * }
- * }</pre>
- *
- * <p>This is where you will handle a scan result.</p>
- *
- * <p>Second, just call this in response to a user action somewhere to begin the scan process:</p>
- *
- * <pre>{@code
- * IntentIntegrator integrator = new IntentIntegrator(yourActivity);
- * integrator.initiateScan();
- * }</pre>
- *
- * <p>Note that {@link #initiateScan()} returns an {@link AlertDialog} which is non-null if the
- * user was prompted to download the application. This lets the calling app potentially manage the dialog.
- * In particular, ideally, the app dismisses the dialog if it's still active in its {@link Activity#onPause()}
- * method.</p>
- *
- * <p>You can use {@link #setTitle(String)} to customize the title of this download prompt dialog (or, use
- * {@link #setTitleByID(int)} to set the title by string resource ID.) Likewise, the prompt message, and
- * yes/no button labels can be changed.</p>
- *
- * <p>Finally, you can use {@link #addExtra(String, Object)} to add more parameters to the Intent used
- * to invoke the scanner. This can be used to set additional options not directly exposed by this
- * simplified API.</p>
- *
- * <p>By default, this will only allow applications that are known to respond to this intent correctly
- * do so. The apps that are allowed to response can be set with {@link #setTargetApplications(List)}.
- * For example, set to {@link #TARGET_BARCODE_SCANNER_ONLY} to only target the Barcode Scanner app itself.</p>
- *
- * <h2>Sharing text via barcode</h2>
- *
- * <p>To share text, encoded as a QR Code on-screen, similarly, see {@link #shareText(CharSequence)}.</p>
- *
- * <p>Some code, particularly download integration, was contributed from the Anobiit application.</p>
- *
- * <h2>Enabling experimental barcode formats</h2>
- *
- * <p>Some formats are not enabled by default even when scanning with {@link #ALL_CODE_TYPES}, such as
- * PDF417. Use {@link #initiateScan(Collection)} with
- * a collection containing the names of formats to scan for explicitly, like "PDF_417", to use such
- * formats.</p>
- *
- * @author Sean Owen
- * @author Fred Lin
- * @author Isaac Potoczny-Jones
- * @author Brad Drehmer
- * @author gcstang
- */
-public class IntentIntegrator {
-
-    public static final int REQUEST_CODE = 0x0000c0de; // Only use bottom 16 bits
-    private static final String TAG = IntentIntegrator.class.getSimpleName();
-
-    public static final String DEFAULT_TITLE = "Install Barcode Scanner?";
-    public static final String DEFAULT_MESSAGE =
-            "This application requires Barcode Scanner. Would you like to install it?";
-    public static final String DEFAULT_YES = "Yes";
-    public static final String DEFAULT_NO = "No";
-
-    private static final String BS_PACKAGE = "com.google.zxing.client.android";
-    private static final String BSPLUS_PACKAGE = "com.srowen.bs.android";
-
-    // supported barcode formats
-    public static final Collection<String> PRODUCT_CODE_TYPES = list("UPC_A", "UPC_E", "EAN_8", "EAN_13", "RSS_14");
-    public static final Collection<String> ONE_D_CODE_TYPES =
-            list("UPC_A", "UPC_E", "EAN_8", "EAN_13", "CODE_39", "CODE_93", "CODE_128",
-                    "ITF", "RSS_14", "RSS_EXPANDED");
-    public static final Collection<String> QR_CODE_TYPES = Collections.singleton("QR_CODE");
-    public static final Collection<String> DATA_MATRIX_TYPES = Collections.singleton("DATA_MATRIX");
-
-    public static final Collection<String> ALL_CODE_TYPES = null;
-
-    public static final List<String> TARGET_BARCODE_SCANNER_ONLY = Collections.singletonList(BS_PACKAGE);
-    public static final List<String> TARGET_ALL_KNOWN = list(
-            BSPLUS_PACKAGE,             // Barcode Scanner+
-            BSPLUS_PACKAGE + ".simple", // Barcode Scanner+ Simple
-            BS_PACKAGE                  // Barcode Scanner
-            // What else supports this intent?
-    );
-
-    private final Activity activity;
-    private final Fragment fragment;
-
-    private String title;
-    private String message;
-    private String buttonYes;
-    private String buttonNo;
-    private List<String> targetApplications;
-    private final Map<String,Object> moreExtras = new HashMap<String,Object>(3);
-
-    /**
-     * @param activity {@link Activity} invoking the integration
-     */
-    public IntentIntegrator(Activity activity) {
-        this.activity = activity;
-        this.fragment = null;
-        initializeConfiguration();
-    }
-
-    /**
-     * @param fragment {@link Fragment} invoking the integration.
-     *  {@link #startActivityForResult(Intent, int)} will be called on the {@link Fragment} instead
-     *  of an {@link Activity}
-     */
-    public IntentIntegrator(Fragment fragment) {
-        this.activity = fragment.getActivity();
-        this.fragment = fragment;
-        initializeConfiguration();
-    }
-
-    private void initializeConfiguration() {
-        title = DEFAULT_TITLE;
-        message = DEFAULT_MESSAGE;
-        buttonYes = DEFAULT_YES;
-        buttonNo = DEFAULT_NO;
-        targetApplications = TARGET_ALL_KNOWN;
-    }
-
-    public String getTitle() {
-        return title;
-    }
-
-    public void setTitle(String title) {
-        this.title = title;
-    }
-
-    public void setTitleByID(int titleID) {
-        title = activity.getString(titleID);
-    }
-
-    public String getMessage() {
-        return message;
-    }
-
-    public void setMessage(String message) {
-        this.message = message;
-    }
-
-    public void setMessageByID(int messageID) {
-        message = activity.getString(messageID);
-    }
-
-    public String getButtonYes() {
-        return buttonYes;
-    }
-
-    public void setButtonYes(String buttonYes) {
-        this.buttonYes = buttonYes;
-    }
-
-    public void setButtonYesByID(int buttonYesID) {
-        buttonYes = activity.getString(buttonYesID);
-    }
-
-    public String getButtonNo() {
-        return buttonNo;
-    }
-
-    public void setButtonNo(String buttonNo) {
-        this.buttonNo = buttonNo;
-    }
-
-    public void setButtonNoByID(int buttonNoID) {
-        buttonNo = activity.getString(buttonNoID);
-    }
-
-    public Collection<String> getTargetApplications() {
-        return targetApplications;
-    }
-
-    public final void setTargetApplications(List<String> targetApplications) {
-        if (targetApplications.isEmpty()) {
-            throw new IllegalArgumentException("No target applications");
-        }
-        this.targetApplications = targetApplications;
-    }
-
-    public void setSingleTargetApplication(String targetApplication) {
-        this.targetApplications = Collections.singletonList(targetApplication);
-    }
-
-    public Map<String,?> getMoreExtras() {
-        return moreExtras;
-    }
-
-    public final void addExtra(String key, Object value) {
-        moreExtras.put(key, value);
-    }
-
-    /**
-     * Initiates a scan for all known barcode types with the default camera.
-     *
-     * @return the {@link AlertDialog} that was shown to the user prompting them to download the app
-     *   if a prompt was needed, or null otherwise.
-     */
-    public final AlertDialog initiateScan() {
-        return initiateScan(ALL_CODE_TYPES, -1);
-    }
-
-    /**
-     * Initiates a scan for all known barcode types with the specified camera.
-     *
-     * @param cameraId camera ID of the camera to use. A negative value means "no preference".
-     * @return the {@link AlertDialog} that was shown to the user prompting them to download the app
-     *   if a prompt was needed, or null otherwise.
-     */
-    public final AlertDialog initiateScan(int cameraId) {
-        return initiateScan(ALL_CODE_TYPES, cameraId);
-    }
-
-    /**
-     * Initiates a scan, using the default camera, only for a certain set of barcode types, given as strings corresponding
-     * to their names in ZXing's {@code BarcodeFormat} class like "UPC_A". You can supply constants
-     * like {@link #PRODUCT_CODE_TYPES} for example.
-     *
-     * @param desiredBarcodeFormats names of {@code BarcodeFormat}s to scan for
-     * @return the {@link AlertDialog} that was shown to the user prompting them to download the app
-     *   if a prompt was needed, or null otherwise.
-     */
-    public final AlertDialog initiateScan(Collection<String> desiredBarcodeFormats) {
-        return initiateScan(desiredBarcodeFormats, -1);
-    }
-
-    /**
-     * Initiates a scan, using the specified camera, only for a certain set of barcode types, given as strings corresponding
-     * to their names in ZXing's {@code BarcodeFormat} class like "UPC_A". You can supply constants
-     * like {@link #PRODUCT_CODE_TYPES} for example.
-     *
-     * @param desiredBarcodeFormats names of {@code BarcodeFormat}s to scan for
-     * @param cameraId camera ID of the camera to use. A negative value means "no preference".
-     * @return the {@link AlertDialog} that was shown to the user prompting them to download the app
-     *   if a prompt was needed, or null otherwise
-     */
-    public final AlertDialog initiateScan(Collection<String> desiredBarcodeFormats, int cameraId) {
-        Intent intentScan = new Intent(BS_PACKAGE + ".SCAN");
-        intentScan.addCategory(Intent.CATEGORY_DEFAULT);
-
-        // check which types of codes to scan for
-        if (desiredBarcodeFormats != null) {
-            // set the desired barcode types
-            StringBuilder joinedByComma = new StringBuilder();
-            for (String format : desiredBarcodeFormats) {
-                if (joinedByComma.length() > 0) {
-                    joinedByComma.append(',');
-                }
-                joinedByComma.append(format);
-            }
-            intentScan.putExtra("SCAN_FORMATS", joinedByComma.toString());
-        }
-
-        // check requested camera ID
-        if (cameraId >= 0) {
-            intentScan.putExtra("SCAN_CAMERA_ID", cameraId);
-        }
-
-        String targetAppPackage = findTargetAppPackage(intentScan);
-        if (targetAppPackage == null) {
-            return showDownloadDialog();
-        }
-        intentScan.setPackage(targetAppPackage);
-        intentScan.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
-        intentScan.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
-        attachMoreExtras(intentScan);
-        startActivityForResult(intentScan, REQUEST_CODE);
-        return null;
-    }
-
-    /**
-     * Start an activity. This method is defined to allow different methods of activity starting for
-     * newer versions of Android and for compatibility library.
-     *
-     * @param intent Intent to start.
-     * @param code Request code for the activity
-     * @see Activity#startActivityForResult(Intent, int)
-     * @see Fragment#startActivityForResult(Intent, int)
-     */
-    protected void startActivityForResult(Intent intent, int code) {
-        if (fragment == null) {
-            activity.startActivityForResult(intent, code);
-        } else {
-            fragment.startActivityForResult(intent, code);
-        }
-    }
-
-    private String findTargetAppPackage(Intent intent) {
-        PackageManager pm = activity.getPackageManager();
-        List<ResolveInfo> availableApps = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
-        if (availableApps != null) {
-            for (String targetApp : targetApplications) {
-                if (contains(availableApps, targetApp)) {
-                    return targetApp;
-                }
-            }
-        }
-        return null;
-    }
-
-    private static boolean contains(Iterable<ResolveInfo> availableApps, String targetApp) {
-        for (ResolveInfo availableApp : availableApps) {
-            String packageName = availableApp.activityInfo.packageName;
-            if (targetApp.equals(packageName)) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    private AlertDialog showDownloadDialog() {
-        AlertDialog.Builder downloadDialog = new AlertDialog.Builder(activity);
-        downloadDialog.setTitle(title);
-        downloadDialog.setMessage(message);
-        downloadDialog.setPositiveButton(buttonYes, new DialogInterface.OnClickListener() {
-            @Override
-            public void onClick(DialogInterface dialogInterface, int i) {
-                String packageName;
-                if (targetApplications.contains(BS_PACKAGE)) {
-                    // Prefer to suggest download of BS if it's anywhere in the list
-                    packageName = BS_PACKAGE;
-                } else {
-                    // Otherwise, first option:
-                    packageName = targetApplications.get(0);
-                }
-                Uri uri = Uri.parse("market://details?id=" + packageName);
-                Intent intent = new Intent(Intent.ACTION_VIEW, uri);
-                try {
-                    if (fragment == null) {
-                        activity.startActivity(intent);
-                    } else {
-                        fragment.startActivity(intent);
-                    }
-                } catch (ActivityNotFoundException anfe) {
-                    // Hmm, market is not installed
-                    Log.w(TAG, "Google Play is not installed; cannot install " + packageName);
-                }
-            }
-        });
-        downloadDialog.setNegativeButton(buttonNo, null);
-        downloadDialog.setCancelable(true);
-        return downloadDialog.show();
-    }
-
-
-    /**
-     * <p>Call this from your {@link Activity}'s
-     * {@link Activity#onActivityResult(int, int, Intent)} method.</p>
-     *
-     * @param requestCode request code from {@code onActivityResult()}
-     * @param resultCode result code from {@code onActivityResult()}
-     * @param intent {@link Intent} from {@code onActivityResult()}
-     * @return null if the event handled here was not related to this class, or
-     *  else an {@link IntentResult} containing the result of the scan. If the user cancelled scanning,
-     *  the fields will be null.
-     */
-    public static IntentResult parseActivityResult(int requestCode, int resultCode, Intent intent) {
-        if (requestCode == REQUEST_CODE) {
-            if (resultCode == Activity.RESULT_OK) {
-                String contents = intent.getStringExtra("SCAN_RESULT");
-                String formatName = intent.getStringExtra("SCAN_RESULT_FORMAT");
-                byte[] rawBytes = intent.getByteArrayExtra("SCAN_RESULT_BYTES");
-                int intentOrientation = intent.getIntExtra("SCAN_RESULT_ORIENTATION", Integer.MIN_VALUE);
-                Integer orientation = intentOrientation == Integer.MIN_VALUE ? null : intentOrientation;
-                String errorCorrectionLevel = intent.getStringExtra("SCAN_RESULT_ERROR_CORRECTION_LEVEL");
-                return new IntentResult(contents,
-                        formatName,
-                        rawBytes,
-                        orientation,
-                        errorCorrectionLevel);
-            }
-            return new IntentResult();
-        }
-        return null;
-    }
-
-
-    /**
-     * Defaults to type "TEXT_TYPE".
-     *
-     * @param text the text string to encode as a barcode
-     * @return the {@link AlertDialog} that was shown to the user prompting them to download the app
-     *   if a prompt was needed, or null otherwise
-     * @see #shareText(CharSequence, CharSequence)
-     */
-    public final AlertDialog shareText(CharSequence text) {
-        return shareText(text, "TEXT_TYPE");
-    }
-
-    /**
-     * Shares the given text by encoding it as a barcode, such that another user can
-     * scan the text off the screen of the device.
-     *
-     * @param text the text string to encode as a barcode
-     * @param type type of data to encode. See {@code com.google.zxing.client.android.Contents.Type} constants.
-     * @return the {@link AlertDialog} that was shown to the user prompting them to download the app
-     *   if a prompt was needed, or null otherwise
-     */
-    public final AlertDialog shareText(CharSequence text, CharSequence type) {
-        Intent intent = new Intent();
-        intent.addCategory(Intent.CATEGORY_DEFAULT);
-        intent.setAction(BS_PACKAGE + ".ENCODE");
-        intent.putExtra("ENCODE_TYPE", type);
-        intent.putExtra("ENCODE_DATA", text);
-        String targetAppPackage = findTargetAppPackage(intent);
-        if (targetAppPackage == null) {
-            return showDownloadDialog();
-        }
-        intent.setPackage(targetAppPackage);
-        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
-        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
-        attachMoreExtras(intent);
-        if (fragment == null) {
-            activity.startActivity(intent);
-        } else {
-            fragment.startActivity(intent);
-        }
-        return null;
-    }
-
-    private static List<String> list(String... values) {
-        return Collections.unmodifiableList(Arrays.asList(values));
-    }
-
-    private void attachMoreExtras(Intent intent) {
-        for (Map.Entry<String,Object> entry : moreExtras.entrySet()) {
-            String key = entry.getKey();
-            Object value = entry.getValue();
-            // Kind of hacky
-            if (value instanceof Integer) {
-                intent.putExtra(key, (Integer) value);
-            } else if (value instanceof Long) {
-                intent.putExtra(key, (Long) value);
-            } else if (value instanceof Boolean) {
-                intent.putExtra(key, (Boolean) value);
-            } else if (value instanceof Double) {
-                intent.putExtra(key, (Double) value);
-            } else if (value instanceof Float) {
-                intent.putExtra(key, (Float) value);
-            } else if (value instanceof Bundle) {
-                intent.putExtra(key, (Bundle) value);
-            } else {
-                intent.putExtra(key, value.toString());
-            }
-        }
-    }
-
-}
-

android-scanner/src/main/java/com/google/zxing/integration/android/IntentResult.java

@@ -1,94 +0,0 @@
-/*
- * Copyright 2009 ZXing authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.google.zxing.integration.android;
-
-/**
- * <p>Encapsulates the result of a barcode scan invoked through {@link IntentIntegrator}.</p>
- *
- * @author Sean Owen
- */
-public final class IntentResult {
-
-    private final String contents;
-    private final String formatName;
-    private final byte[] rawBytes;
-    private final Integer orientation;
-    private final String errorCorrectionLevel;
-
-    IntentResult() {
-        this(null, null, null, null, null);
-    }
-
-    IntentResult(String contents,
-                 String formatName,
-                 byte[] rawBytes,
-                 Integer orientation,
-                 String errorCorrectionLevel) {
-        this.contents = contents;
-        this.formatName = formatName;
-        this.rawBytes = rawBytes;
-        this.orientation = orientation;
-        this.errorCorrectionLevel = errorCorrectionLevel;
-    }
-
-    /**
-     * @return raw content of barcode
-     */
-    public String getContents() {
-        return contents;
-    }
-
-    /**
-     * @return name of format, like "QR_CODE", "UPC_A". See {@code BarcodeFormat} for more format names.
-     */
-    public String getFormatName() {
-        return formatName;
-    }
-
-    /**
-     * @return raw bytes of the barcode content, if applicable, or null otherwise
-     */
-    public byte[] getRawBytes() {
-        return rawBytes;
-    }
-
-    /**
-     * @return rotation of the image, in degrees, which resulted in a successful scan. May be null.
-     */
-    public Integer getOrientation() {
-        return orientation;
-    }
-
-    /**
-     * @return name of the error correction level used in the barcode, if applicable
-     */
-    public String getErrorCorrectionLevel() {
-        return errorCorrectionLevel;
-    }
-
-    @Override
-    public String toString() {
-        int rawBytesLength = rawBytes == null ? 0 : rawBytes.length;
-        return "Format: " + formatName + '\n' +
-                "Contents: " + contents + '\n' +
-                "Raw bytes: (" + rawBytesLength + " bytes)\n" +
-                "Orientation: " + orientation + '\n' +
-                "EC level: " + errorCorrectionLevel + '\n';
-    }
-
-}
-

android-scanner/src/main/java/com/meerkat/laura/fakescannerapp/AppCompatPreferenceActivity.java

@@ -1,109 +0,0 @@
-package com.meerkat.laura.fakescannerapp;
-
-import android.content.res.Configuration;
-import android.os.Bundle;
-import android.preference.PreferenceActivity;
-import android.support.annotation.LayoutRes;
-import android.support.annotation.Nullable;
-import android.support.v7.app.ActionBar;
-import android.support.v7.app.AppCompatDelegate;
-import android.support.v7.widget.Toolbar;
-import android.view.MenuInflater;
-import android.view.View;
-import android.view.ViewGroup;
-
-/**
- * A {@link android.preference.PreferenceActivity} which implements and proxies the necessary calls
- * to be used with AppCompat.
- */
-public abstract class AppCompatPreferenceActivity extends PreferenceActivity {
-
-    private AppCompatDelegate mDelegate;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        getDelegate().installViewFactory();
-        getDelegate().onCreate(savedInstanceState);
-        super.onCreate(savedInstanceState);
-    }
-
-    @Override
-    protected void onPostCreate(Bundle savedInstanceState) {
-        super.onPostCreate(savedInstanceState);
-        getDelegate().onPostCreate(savedInstanceState);
-    }
-
-    public ActionBar getSupportActionBar() {
-        return getDelegate().getSupportActionBar();
-    }
-
-    public void setSupportActionBar(@Nullable Toolbar toolbar) {
-        getDelegate().setSupportActionBar(toolbar);
-    }
-
-    @Override
-    public MenuInflater getMenuInflater() {
-        return getDelegate().getMenuInflater();
-    }
-
-    @Override
-    public void setContentView(@LayoutRes int layoutResID) {
-        getDelegate().setContentView(layoutResID);
-    }
-
-    @Override
-    public void setContentView(View view) {
-        getDelegate().setContentView(view);
-    }
-
-    @Override
-    public void setContentView(View view, ViewGroup.LayoutParams params) {
-        getDelegate().setContentView(view, params);
-    }
-
-    @Override
-    public void addContentView(View view, ViewGroup.LayoutParams params) {
-        getDelegate().addContentView(view, params);
-    }
-
-    @Override
-    protected void onPostResume() {
-        super.onPostResume();
-        getDelegate().onPostResume();
-    }
-
-    @Override
-    protected void onTitleChanged(CharSequence title, int color) {
-        super.onTitleChanged(title, color);
-        getDelegate().setTitle(title);
-    }
-
-    @Override
-    public void onConfigurationChanged(Configuration newConfig) {
-        super.onConfigurationChanged(newConfig);
-        getDelegate().onConfigurationChanged(newConfig);
-    }
-
-    @Override
-    protected void onStop() {
-        super.onStop();
-        getDelegate().onStop();
-    }
-
-    @Override
-    protected void onDestroy() {
-        super.onDestroy();
-        getDelegate().onDestroy();
-    }
-
-    public void invalidateOptionsMenu() {
-        getDelegate().invalidateOptionsMenu();
-    }
-
-    private AppCompatDelegate getDelegate() {
-        if (mDelegate == null) {
-            mDelegate = AppCompatDelegate.create(this, null);
-        }
-        return mDelegate;
-    }
-}

android-scanner/src/main/java/com/meerkat/laura/fakescannerapp/MainActivity.java

@@ -1,252 +0,0 @@
-package com.meerkat.laura.fakescannerapp;
-
-
-import android.content.Intent;
-import android.content.SharedPreferences;
-import android.graphics.Color;
-import android.os.AsyncTask;
-import android.os.Bundle;
-import android.preference.Preference;
-import android.preference.PreferenceManager;
-import android.support.v7.app.AppCompatActivity;
-import android.util.Base64;
-import android.util.Log;
-import android.view.Menu;
-import android.view.MenuInflater;
-import android.view.MenuItem;
-import android.view.View;
-import android.widget.Button;
-import android.widget.TextView;
-import android.widget.Toast;
-import ch.qos.logback.classic.android.BasicLogcatConfigurator;
-import com.google.protobuf.InvalidProtocolBufferException;
-import com.google.protobuf.Message;
-import com.google.zxing.integration.android.IntentIntegrator;
-import com.google.zxing.integration.android.IntentResult;
-import meerkat.crypto.DigitalSignatureGenerator;
-import meerkat.crypto.concrete.ECDSADeterministicSignature;
-import meerkat.pollingstation.PollingStationScanner;
-import meerkat.pollingstation.ScannerClientAPI;
-import meerkat.protobuf.PollingStation;
-
-import java.math.BigInteger;
-import java.util.Date;
-
-import static com.meerkat.laura.fakescannerapp.R.xml.preferences;
-
-
-public class MainActivity extends AppCompatActivity implements View.OnClickListener,  SharedPreferences.OnSharedPreferenceChangeListener {
-
-    static {
-        BasicLogcatConfigurator.configureDefaultContext();
-    }
-
-    final public static String SCANNER_NAME = "AndroidScanner";
-    SharedPreferences sharedPref;
-
-    Button scanBtn;
-    TextView formatTxt, contentTxt, responseTxt, serverStatus;
-    PollingStationScanner.ScannerClient scannerClient;
-    DigitalSignatureGenerator signer;
-
-    class AsyncScanConnect extends AsyncTask<Void, Void, Boolean> {
-        PollingStation.ConnectionServerData serverData;
-
-        public AsyncScanConnect(PollingStation.ConnectionServerData connectionServerData) {
-            this.serverData = connectionServerData;
-        }
-
-        @Override
-        protected void onPreExecute() {
-            super.onPreExecute();
-            serverStatus.setTextColor(Color.BLUE);
-            serverStatus.setText("Connecting to " + serverData.getServerUrl());
-        }
-
-        @Override
-        protected Boolean doInBackground(Void... foo) {
-            try {
-                return scannerClient.connect(serverData);
-            } catch (RuntimeException e) {
-                Log.e("MainActivity", "Exception during connect: " + e.toString());
-                return false;
-            }
-        }
-
-        @Override
-        protected void onPostExecute(Boolean res) {
-            super.onPostExecute(res);
-            if (res) {
-                serverStatus.setTextColor(Color.GREEN);
-                serverStatus.setText("Connected to " + serverData.getServerUrl());
-            } else {
-                serverStatus.setTextColor(Color.RED);
-                serverStatus.setText("Connection failed: " + serverData.getServerUrl());
-            }
-        }
-    }
-
-    class AsyncScanSend extends AsyncTask<Void, Void, Boolean> {
-        Message data;
-
-        public AsyncScanSend(Message data) {
-            this.data = data;
-        }
-
-        @Override
-        protected void onPreExecute() {
-            super.onPreExecute();
-            serverStatus.setTextColor(Color.BLUE);
-            serverStatus.setText("Sending to server...");
-        }
-
-        @Override
-        protected Boolean doInBackground(Void... foo) {
-            try {
-                if (data instanceof PollingStation.ScannedBallot) {
-                    return scannerClient.newScan((PollingStation.ScannedBallot) data);
-                } else if (data instanceof PollingStation.ScanError) {
-                    return scannerClient.reportError((PollingStation.ScanError) data);
-                } else {
-                    Log.e("MainActivity", "Trying to send invalid message to scanner");
-                    return false;
-                }
-            } catch (RuntimeException e) {
-                Log.e("MainActivity", "Exception during send: " + e.toString());
-                return false;
-            }
-        }
-
-        @Override
-        protected void onPostExecute(Boolean res) {
-            super.onPostExecute(res);
-            if (res) {
-                serverStatus.setTextColor(Color.GREEN);
-                serverStatus.setText("Sent successfully");
-                Log.i("MainActivity", "post submitted to API.");
-            } else {
-                serverStatus.setTextColor(Color.RED);
-                serverStatus.setText("Send failed");
-                Log.e("MainActivity", "Unable to submit post to API.");
-            }
-        }
-    }
-
-
-    @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-        MenuInflater inflater = getMenuInflater();
-        inflater.inflate(R.menu.options_menu, menu);
-        return true;
-    }
-
-    @Override
-    public boolean onOptionsItemSelected(MenuItem item) {
-        // Handle item selection
-        switch (item.getItemId()) {
-            case R.id.action_settings:
-                Intent i = new Intent(this, SettingsActivity.class);
-                startActivity(i);
-                return true;
-            default:
-                return super.onOptionsItemSelected(item);
-        }
-    }
-
-    void setNewScannerClientAPI(SharedPreferences sharedPref) {
-        String pscUrlString = sharedPref.getString(SettingsFragment.PSC_URL, "");
-        long nonce = 0;
-
-        try {
-            nonce = Long.parseLong(sharedPref.getString(SettingsFragment.PSC_NONCE, "0"));
-        } catch (NumberFormatException e) {
-            // Ignore
-        }
-
-        if (pscUrlString.isEmpty())
-            return;
-
-        PollingStation.ConnectionServerData serverData = PollingStation.ConnectionServerData.newBuilder()
-                .setServerUrl(pscUrlString)
-                .setNonce(nonce)
-                .build();
-
-        new AsyncScanConnect(serverData).execute();
-    }
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_main);
-
-        signer = new ECDSADeterministicSignature();
-        signer.generateSigningCertificate(BigInteger.ONE, new Date(System.currentTimeMillis()),
-                new Date(System.currentTimeMillis() + 1000 * 60 * 60 * 24 * 365), SCANNER_NAME);
-        scannerClient = new ScannerClientAPI(signer);
-
-        PreferenceManager.setDefaultValues(this, preferences, false);
-        sharedPref = PreferenceManager.getDefaultSharedPreferences(this);
-        sharedPref.registerOnSharedPreferenceChangeListener(this);
-
-        scanBtn = (Button) findViewById(R.id.scan_button);
-        formatTxt = (TextView) findViewById(R.id.scan_format);
-        contentTxt = (TextView) findViewById(R.id.scan_content);
-        responseTxt = (TextView) findViewById(R.id.server_response);
-        serverStatus = (TextView) findViewById(R.id.serverStatus);
-
-        setNewScannerClientAPI(sharedPref);
-        scanBtn.setOnClickListener(this);
-    }
-
-    public void onClick(View v) {
-        if (v.getId() == R.id.scan_button) {
-            IntentIntegrator scanIntegrator = new IntentIntegrator(this);
-            formatTxt.setText("Initiating scan...");
-            scanIntegrator.initiateScan();
-        }
-    }
-
-    public void onActivityResult(int requestCode, int resultCode, Intent intent) {
-        IntentResult scanningResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
-        if (scanningResult != null) {
-            String scanContent = scanningResult.getContents();
-            byte[] rawBytes = scanningResult.getRawBytes();
-            String scanFormat = scanningResult.getFormatName();
-            formatTxt.setText("FORMAT: " + scanFormat);
-            contentTxt.setText("CONTENT: " + scanContent + "sending data to server...");
-//            sendPost(rawBytes);
-            sendPost(scanContent);
-        } else {
-            Toast toast = Toast.makeText(getApplicationContext(),
-                    "No scan data received!", Toast.LENGTH_SHORT);
-            toast.show();
-        }
-    }
-
-    //    public void sendPost(byte[] body) {
-    public void sendPost(String scanContent) {
-
-        try {
-            PollingStation.ScannedBallot scannedBallot = PollingStation.ScannedBallot.parseFrom(Base64.decode(scanContent.getBytes(), Base64.DEFAULT));
-            //
-            //        PollingStation.ScannedData scannedData = PollingStation.ScannedData.newBuilder()
-            //                .setChannel(ByteString.copyFrom(body))
-            //                .build();
-
-            new AsyncScanSend(scannedBallot).execute();
-        } catch (InvalidProtocolBufferException e) {
-            e.printStackTrace();
-        }
-    }
-
-    public void showResponse(String response) {
-        responseTxt.setText(response);
-    }
-
-
-    @Override
-    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key){
-        setNewScannerClientAPI(sharedPreferences);
-    }
-
-}

android-scanner/src/main/java/com/meerkat/laura/fakescannerapp/SettingsActivity.java

@@ -1,26 +0,0 @@
-package com.meerkat.laura.fakescannerapp;
-
-import android.app.Activity;
-import android.content.SharedPreferences;
-import android.os.Bundle;
-import android.preference.PreferenceManager;
-
-/**
- * Created by talm on 25/06/17.
- */
-public class SettingsActivity extends Activity {
-    SettingsFragment settings;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
-        settings = new SettingsFragment();
-        PreferenceManager.getDefaultSharedPreferences(this).registerOnSharedPreferenceChangeListener(settings);
-
-        // Display the fragment as the main content.
-        getFragmentManager().beginTransaction()
-                .replace(android.R.id.content, settings)
-                .commit();
-    }
-}

android-scanner/src/main/java/com/meerkat/laura/fakescannerapp/SettingsFragment.java

@@ -1,34 +0,0 @@
-package com.meerkat.laura.fakescannerapp;
-
-import android.content.SharedPreferences;
-import android.os.Bundle;
-import android.preference.Preference;
-import android.preference.PreferenceActivity;
-import android.preference.PreferenceFragment;
-import android.preference.PreferenceManager;
-
-public class SettingsFragment extends PreferenceFragment implements SharedPreferences.OnSharedPreferenceChangeListener {
-    public final static String PSC_URL = "psc_url";
-    public final static String PSC_NONCE = "psc_nonce";
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        addPreferencesFromResource(R.xml.preferences);
-    }
-
-    @Override
-    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
-        Preference pref = findPreference(key);
-        if (pref == null)
-            return;
-        switch(key) {
-            case SettingsFragment.PSC_URL:
-                pref.setSummary(sharedPreferences.getString(key, ""));
-                break;
-            case SettingsFragment.PSC_NONCE:
-                pref.setSummary(sharedPreferences.getString(key, ""));
-                break;
-        }
-    }
-}

android-scanner/src/main/res/drawable/ic_info_black_24dp.xml

@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-            android:fillColor="#FF000000"
-            android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zm1,15h-2v-6h2v6zm0,-8h-2V7h2v2z"/>
-</vector>

android-scanner/src/main/res/drawable/ic_notifications_black_24dp.xml

@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-            android:fillColor="#FF000000"
-            android:pathData="M11.5,22c1.1,0 2,-0.9 2,-2h-4c0,1.1 0.9,2 2,2zm6.5,-6v-5.5c0,-3.07 -2.13,-5.64 -5,-6.32V3.5c0,-0.83 -0.67,-1.5 -1.5,-1.5S10,2.67 10,3.5v0.68c-2.87,0.68 -5,3.25 -5,6.32V16l-2,2v1h17v-1l-2,-2z"/>
-</vector>

android-scanner/src/main/res/drawable/ic_sync_black_24dp.xml

@@ -1,9 +0,0 @@
-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-            android:fillColor="#FF000000"
-            android:pathData="M12 4V1L8 5l4 4V6c3.31 0 6 2.69 6 6 0 1.01,-.25 1.97,-.7 2.8l1.46 1.46C19.54 15.03 20 13.57 20 12c0,-4.42,-3.58,-8,-8,-8zm0 14c-3.31 0,-6,-2.69,-6,-6 0,-1.01.25,-1.97.7,-2.8L5.24 7.74C4.46 8.97 4 10.43 4 12c0 4.42 3.58 8 8 8v3l4,-4,-4,-4v3z"/>
-</vector>

android-scanner/src/main/res/layout/activity_main.xml

@@ -1,58 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:paddingLeft="@dimen/activity_horizontal_margin"
-    android:paddingRight="@dimen/activity_horizontal_margin"
-    android:paddingTop="@dimen/activity_vertical_margin"
-    android:paddingBottom="@dimen/activity_vertical_margin"
-    tools:context=".MainActivity">
-
-    <TextView android:text="@string/instructions" android:layout_width="wrap_content"
-              android:layout_height="wrap_content"
-              android:id="@+id/textView" />
-
-    <Button
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="@string/button_txt"
-        android:id="@+id/scan_button"
-        android:layout_below="@+id/textView"
-        android:layout_centerHorizontal="true" />
-
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:textIsSelectable="true"
-        android:id="@+id/scan_format"
-        android:layout_below="@+id/scan_button"
-        android:layout_centerHorizontal="true"
-        android:layout_marginTop="44dp" />
-
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:textIsSelectable="true"
-        android:id="@+id/scan_content"
-        android:layout_below="@+id/scan_format"
-        android:layout_centerHorizontal="true"
-        android:layout_marginTop="32dp" />
-
-    <TextView
-        android:id="@+id/server_response"
-        android:layout_below="@+id/scan_content"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:textIsSelectable="true"
-        android:layout_centerHorizontal="true"
-        android:layout_marginTop="44dp" />
-    <TextView
-            android:text="Not Connected"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content" android:id="@+id/serverStatus"
-            android:layout_alignParentBottom="true"
-            android:layout_alignParentRight="true" android:layout_alignParentEnd="true"
-            android:layout_alignParentLeft="true" android:layout_alignParentStart="true"/>
-
-</RelativeLayout>

android-scanner/src/main/res/menu/options_menu.xml

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto">
-
-    <!-- Settings, should always be in the overflow -->
-    <item android:id="@+id/action_settings"
-        android:title="@string/action_settings"
-        app:showAsAction="never"/>
-</menu>

android-scanner/src/main/res/values-w820dp/dimens.xml

@@ -1,6 +0,0 @@
-<resources>
-    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
-         (such as screen margins) for screens with more than 820dp of available width. This
-         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
-    <dimen name="activity_horizontal_margin">64dp</dimen>
-</resources>

android-scanner/src/main/res/values/colors.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <color name="colorPrimary">#3F51B5</color>
-    <color name="colorPrimaryDark">#303F9F</color>
-    <color name="colorAccent">#FF4081</color>
-</resources>

android-scanner/src/main/res/values/dimens.xml

@@ -1,5 +0,0 @@
-<resources>
-    <!-- Default screen margins, per the Android Design guidelines. -->
-    <dimen name="activity_horizontal_margin">16dp</dimen>
-    <dimen name="activity_vertical_margin">16dp</dimen>
-</resources>

android-scanner/src/main/res/values/strings.xml

@@ -1,80 +0,0 @@
-<resources>
-    <string name="app_name">FakeScannerApp</string>
-    <string name="button_txt">SCAN</string>
-    <string name="instructions">Please, press the button below to scan the vote receipt.</string>
-    <string name="title_activity_settings">Settings</string>
-
-    <!-- Strings related to Settings -->
-    <string name="action_settings">Settings</string>
-
-
-    <!-- Example General settings -->
-    <string name="pref_header_general">General</string>
-
-    <string name="pref_title_social_recommendations">Enable social recommendations</string>
-    <string name="pref_description_social_recommendations">Recommendations for people to contact based on your message
-        history
-    </string>
-
-    <string name="pref_title_psc_url">Scanner Service URL</string>
-    <string name="pref_default_psc_url">http://192.168.70.10:8880/scan</string>
-
-    <string name="pref_title_add_friends_to_messages">Add friends to messages</string>
-    <string-array name="pref_example_list_titles">
-        <item>Always</item>
-        <item>When possible</item>
-        <item>Never</item>
-    </string-array>
-    <string-array name="pref_example_list_values">
-        <item>1</item>
-        <item>0</item>
-        <item>-1</item>
-    </string-array>
-
-    <!-- Example settings for Data & Sync -->
-    <string name="pref_header_data_sync">Data &amp; sync</string>
-
-    <string name="pref_title_sync_frequency">Sync frequency</string>
-    <string-array name="pref_sync_frequency_titles">
-        <item>15 minutes</item>
-        <item>30 minutes</item>
-        <item>1 hour</item>
-        <item>3 hours</item>
-        <item>6 hours</item>
-        <item>Never</item>
-    </string-array>
-    <string-array name="pref_sync_frequency_values">
-        <item>15</item>
-        <item>30</item>
-        <item>60</item>
-        <item>180</item>
-        <item>360</item>
-        <item>-1</item>
-    </string-array>
-
-    <string-array name="list_preference_entries">
-        <item>Entry 1</item>
-        <item>Entry 2</item>
-        <item>Entry 3</item>
-    </string-array>
-
-    <string-array name="list_preference_entry_values">
-        <item>1</item>
-        <item>2</item>
-        <item>3</item>
-    </string-array>
-
-    <string-array name="multi_select_list_preference_default_value"/>
-
-    <string name="pref_title_system_sync_settings">System sync settings</string>
-
-    <!-- Example settings for Notifications -->
-    <string name="pref_header_notifications">Notifications</string>
-
-    <string name="pref_title_new_message_notifications">New message notifications</string>
-
-    <string name="pref_title_ringtone">Ringtone</string>
-    <string name="pref_ringtone_silent">Silent</string>
-
-    <string name="pref_title_vibrate">Vibrate</string>
-</resources>

android-scanner/src/main/res/values/styles.xml

@@ -1,11 +0,0 @@
-<resources>
-
-    <!-- Base application theme. -->
-    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
-        <!-- Customize your theme here. -->
-        <item name="colorPrimary">@color/colorPrimary</item>
-        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
-        <item name="colorAccent">@color/colorAccent</item>
-    </style>
-
-</resources>

android-scanner/src/main/res/xml/preferences.xml

@@ -1,28 +0,0 @@
-<PreferenceScreen xmlns:tools="http://schemas.android.com/tools"
-    xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <!-- NOTE: EditTextPreference accepts EditText attributes. -->
-    <!-- NOTE: EditTextPreference's summary should be set to its value by the activity code. -->
-    <EditTextPreference
-            android:key="psc_url"
-            android:title="@string/pref_title_psc_url"
-            android:defaultValue="@string/pref_default_psc_url"
-            android:selectAllOnFocus="true"
-            android:singleLine="true"
-            android:maxLines="1"
-        android:inputType="textUri" />
-
-    <EditTextPreference
-        android:key="psc_nonce"
-        android:title="Nonce"
-        android:defaultValue="0"
-        android:selectAllOnFocus="true"
-        android:singleLine="true"
-        android:maxLines="1"
-        android:inputType="number"/>
-
-    <!-- NOTE: Hide buttons to simplify the UI. Users can touch outside the dialog to
-         dismiss it. -->
-    <!-- NOTE: ListPreference's summary should be set to its value by the activity code. -->
-
-</PreferenceScreen>

android-scanner/src/test/java/com/meerkat/laura/fakescannerapp/ExampleUnitTest.java

@@ -1,15 +0,0 @@
-package com.meerkat.laura.fakescannerapp;
-
-import org.junit.Test;
-
-import static org.junit.Assert.*;
-
-/**
- * To work on unit tests, switch the Test Artifact in the Build Variants view.
- */
-public class ExampleUnitTest {
-    @Test
-    public void addition_isCorrect() throws Exception {
-        assertEquals(4, 2 + 2);
-    }
-}

build.gradle

@@ -1,56 +1,10 @@
-apply plugin: com.google.gradle.osdetector.OsDetectorPlugin
-
 
 subprojects { proj ->
     proj.afterEvaluate {
         // Used to generate initial maven-dir layout
-        task "create-dirs" {
+        task "create-dirs" { description = "Create default maven directory structure" } << {
-            description = "Create default maven directory structure"
-            doLast {
             sourceSets*.java.srcDirs*.each { it.mkdirs() }
             sourceSets*.resources.srcDirs*.each { it.mkdirs() }
         }
     }
 }
-}
-
-// Script to create a copy of the protobuf compiler jar in the top-level build directory
-// (will make it easier to configure the intellij protobuf plugin)
-repositories {
-    mavenLocal();
-    mavenCentral();
-}
-
-
-project.ext.protocLocation = 'com.google.protobuf:protoc:3.+'
-
-// Copied from Google's protobuf plugin code
-File getProtocDep(protocLocation) {
-    // create a project configuration dependency for the artifact
-    Configuration config = project.configurations.create("protobufToolsLocator") {
-        visible = false
-        transitive = false
-        extendsFrom = []
-    }
-
-    def groupId, artifact, version
-    (groupId, artifact, version) = protocLocation.split(":")
-    def notation = [group: groupId,
-                    name: artifact,
-                    version: version,
-                    classifier: project.osdetector.classifier,
-                    ext: 'exe']
-    Dependency dep = project.dependencies.add(config.name, notation)
-
-    File file = config.fileCollection(dep).singleFile
-
-    return file
-}
-
-
-task getprotoc(type: Copy) {
-    from getProtocDep(project.ext.protocLocation)
-    rename { file -> return "protoc" }
-    into "${buildDir}/"
-}
-

build.gradle-template

@@ -1,7 +1,7 @@
 
 plugins {
-  id "us.kirchmeier.capsule" version "1.0.2"
+  id "us.kirchmeier.capsule" version "1.0.1"
-  id 'com.google.protobuf' version '0.8.1'
+  id 'com.google.protobuf' version '0.7.0'
 }
 
 apply plugin: 'java'
@@ -25,11 +25,8 @@ ext {
         
         // Credentials for IDC nexus repositories (needed only for using unstable repositories and publishing)
         // Should be set in ${HOME}/.gradle/gradle.properties
-
+        nexusUser =  project.hasProperty('nexusUser') ? project.property('nexusUser') : ""
-        // Credentials for publishing repositories
+        nexusPassword = project.hasProperty('nexusPassword') ? project.property('nexusPassword') : ""
-        publishRepository = "https://cs.idc.ac.il/nexus/content/repositories/${project.isSnapshot ? 'snapshots' : 'releases'}"
-        publishUser =  project.hasProperty('publishUser') ? project.property('publishUser') : ""
-        publishPassword = project.hasProperty('publishPassword') ? project.property('publishPassword') : ""
 }
 
 description = "TODO: Add a description"
@@ -134,19 +131,17 @@ if (project.hasProperty('mainClassName') && (mainClassName != null)) {
 
         destinationDir = buildDir
 
-        def fatMain
+        def fatMain = hasProperty('fatmain') ? fatmain : mainClassName
-        
-        if (this.hasProperty('fatmain')) {
-            fatMain = fatmain 
-            appendix = "fat-${fatMain}"
-        } else {
-            fatMain = mainClassName
-            appendix = "fat"
-        }
 
         applicationClass fatMain
 
-        def testJar = this.hasProperty('test')
+        def testJar = hasProperty('test')
+
+        if (hasProperty('fatmain')) {
+            appendix = "fat-${fatMain}"
+        } else {
+            appendix = "fat"
+        }
 
         if (testJar) {
             from sourceSets.test.output
@@ -160,6 +155,21 @@ if (project.hasProperty('mainClassName') && (mainClassName != null)) {
  *===================================*/
 
 repositories {
+        
+        // Prefer the local nexus repository (it may have 3rd party artifacts not found in mavenCentral)
+        maven { 
+            url nexusRepository
+            
+            if (isSnapshot) {
+                credentials { username 
+                    password 
+
+                    username nexusUser
+                    password nexusPassword 
+                }
+            }
+        }
+
         // Use local maven repository
         mavenLocal()
 
@@ -167,8 +177,7 @@ repositories {
         mavenCentral()
 }
 
-task "info"  {
+task "info" << {
-    doLast {
         println "Project: ${project.name}"
 println "Description: ${project.description}"
         println "--------------------------"
@@ -176,7 +185,6 @@ task "info"  {
         println "Version: $version (${isSnapshot ? 'snapshot' : 'release'})"
         println ""
 }
-}
 info.description 'Print some information about project parameters'
 
 
@@ -197,12 +205,12 @@ publishing {
     }
     repositories {
         maven {
-            url publishRepository
+            url "https://cs.idc.ac.il/nexus/content/repositories/${project.isSnapshot ? 'snapshots' : 'releases'}"
             credentials { username 
                 password 
 
-                username publishUser
+                username nexusUser
-                password publishPassword
+                password nexusPassword 
             }
         }
     }

buildSrc/build.gradle

@@ -1,25 +0,0 @@
-apply plugin: 'groovy'
-
-description = 'A Gradle plugin that detects the OS name and architecture, providing a uniform\
- classifier to be used in the names of native artifacts.'
-group = 'com.google.gradle'
-
-// The major and minor versions are aligned with the Maven plugin's.
-version = '1.5.0-SNAPSHOT'
-
-dependencies {
-    compile gradleApi(),
-          localGroovy(),
-          'kr.motd.maven:os-maven-plugin:1.5.0.Final'
-    // Newer versions of gradle conflict with the default guava 10. dependency of the maven
-    // plugin.
-    compile("com.google.guava:guava:19.0") {
-        force = true
-    }
-    testCompile 'junit:junit:4.12'
-}
-
-repositories {
-  mavenLocal()
-  mavenCentral()
-}

buildSrc/gradlew

@@ -1 +0,0 @@
-../gradlew

buildSrc/src/main/groovy/com/google/gradle/osdetector/OsDetectorPlugin.groovy

@@ -1,25 +0,0 @@
-/*
- * Copyright 2015 Google Inc. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- *     Unless required by applicable law or agreed to in writing, software
- *     distributed under the License is distributed on an "AS IS" BASIS,
- *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *     See the License for the specific language governing permissions and
- *     limitations under the License.
- */
-package com.google.gradle.osdetector
-
-import org.gradle.api.Plugin
-import org.gradle.api.Project
-
-class OsDetectorPlugin implements Plugin<Project> {
-  void apply(final Project project) {
-    project.extensions.create('osdetector', OsDetector)
-  }
-}

buildSrc/src/main/java/com/google/gradle/osdetector/OsDetector.java

@@ -1,120 +0,0 @@
-/*
- * Copyright 2015 Google Inc. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- *     Unless required by applicable law or agreed to in writing, software
- *     distributed under the License is distributed on an "AS IS" BASIS,
- *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *     See the License for the specific language governing permissions and
- *     limitations under the License.
- */
-package com.google.gradle.osdetector;
-
-import kr.motd.maven.os.Detector;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Properties;
-
-public class OsDetector {
-  private static final Logger logger = LoggerFactory.getLogger(OsDetector.class.getName());
-
-  private final List<String> classifierWithLikes = new ArrayList<String>();
-  private Impl impl;
-
-  public String getOs() {
-    return (String) getImpl().detectedProperties.get(Detector.DETECTED_NAME);
-  }
-
-  public String getArch() {
-    return (String) getImpl().detectedProperties.get(Detector.DETECTED_ARCH);
-  }
-
-  public String getClassifier() {
-    return (String) getImpl().detectedProperties.get(Detector.DETECTED_CLASSIFIER);
-  }
-
-  public Release getRelease() {
-    Impl impl = getImpl();
-    Object releaseId = impl.detectedProperties.get(Detector.DETECTED_RELEASE);
-    if (releaseId == null) {
-      return null;
-    }
-    return new Release(impl);
-  }
-
-  public synchronized void setClassifierWithLikes(List<String> classifierWithLikes) {
-    if (impl != null) {
-      throw new IllegalStateException("classifierWithLikes must be set before osdetector is read.");
-    }
-    this.classifierWithLikes.clear();
-    this.classifierWithLikes.addAll(classifierWithLikes);
-  }
-
-  private synchronized Impl getImpl() {
-    if (impl == null) {
-      impl = new Impl(classifierWithLikes);
-    }
-    return impl;
-  }
-
-  /**
-   * Accessor to information about the current OS release.
-   */
-  public static class Release {
-    private final Impl impl;
-
-    private Release(Impl impl) {
-      this.impl = impl;
-    }
-
-    /**
-     * Returns the release ID.
-     */
-    public String getId() {
-      return (String) impl.detectedProperties.get(Detector.DETECTED_RELEASE);
-    }
-
-    /**
-     * Returns the version ID.
-     */
-    public String getVersion() {
-      return (String) impl.detectedProperties.get(Detector.DETECTED_RELEASE_VERSION);
-    }
-
-    /**
-     * Returns {@code true} if this release is a variant of the given base release (for example,
-     * ubuntu is "like" debian).
-     */
-    public boolean isLike(String baseRelease) {
-      return impl.detectedProperties.containsKey(
-          Detector.DETECTED_RELEASE_LIKE_PREFIX + baseRelease);
-    }
-  }
-
-  private static class Impl extends Detector {
-    final Properties detectedProperties = System.getProperties();
-
-    @Override
-    protected void log(String message) {
-      logger.info(message);
-    }
-
-    @Override
-    protected void logProperty(String name, String value) {
-      logger.info(name + "=" + value);
-    }
-
-    Impl(List<String> classifierWithLikes) {
-      detect(detectedProperties, classifierWithLikes);
-    }
-  }
-}

buildSrc/src/main/resources/META-INF/gradle-plugins/com.google.osdetector.properties

@@ -1 +0,0 @@
-implementation-class=com.google.gradle.osdetector.OsDetectorPlugin

buildSrc/src/test/groovy/com/google/gradle/osdetector/OsDetectorPluginTest.groovy

@@ -1,62 +0,0 @@
-/*
- * Copyright 2015 Google Inc. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- *     Unless required by applicable law or agreed to in writing, software
- *     distributed under the License is distributed on an "AS IS" BASIS,
- *     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *     See the License for the specific language governing permissions and
- *     limitations under the License.
- */
-package com.google.gradle.osdetector
-
-import org.gradle.testfixtures.ProjectBuilder
-import org.gradle.api.Project
-import org.junit.Test
-import static org.junit.Assert.assertEquals
-import static org.junit.Assert.assertNotNull
-import static org.junit.Assert.fail
-
-class OsDetectorPluginTest {
-  @Test
-  public void pluginAddsExtensionToProject() {
-    Project project = ProjectBuilder.builder().build()
-    project.apply plugin: 'com.google.osdetector'
-    assertNotNull(project.osdetector)
-    assertNotNull(project.osdetector.os)
-    assertNotNull(project.osdetector.arch)
-    assertEquals(project.osdetector.os + '-' + project.osdetector.arch,
-        project.osdetector.classifier)
-    System.err.println('classifier=' + project.osdetector.classifier)
-    if (project.osdetector.os == 'linux') {
-      assertNotNull(project.osdetector.release.id)
-      assertNotNull(project.osdetector.release.version)
-      System.err.println('release.id=' + project.osdetector.release.id)
-      System.err.println('release.version=' + project.osdetector.release.version)
-      System.err.println('release.isLike(debian)=' + project.osdetector.release.isLike('debian'))
-      System.err.println('release.isLike(redhat)=' + project.osdetector.release.isLike('redhat'))
-    } else if (project.osdetector.release) {
-      fail("Should be null")
-    }
-  }
-
-  @Test
-  public void setClassifierWithLikes() {
-    Project project = ProjectBuilder.builder().build()
-    project.apply plugin: 'com.google.osdetector'
-    project.osdetector.classifierWithLikes = ['debian', 'fedora']
-    assertNotNull(project.osdetector.os)
-    assertNotNull(project.osdetector.arch)
-    System.err.println('classifier=' + project.osdetector.classifier)
-    try {
-      project.osdetector.classifierWithLikes = ['debian']
-      fail("Should throw IllegalStateException")
-    } catch (IllegalStateException expected) {
-    }
-  }
-}

bulletin-board-client/META-INF/MANIFEST.MF

@@ -1,3 +0,0 @@
-Manifest-Version: 1.0
-Main-Class: meerkat.voting.gui.configuration.Converter
-

bulletin-board-client/build.gradle

@@ -1,7 +1,7 @@
 
 plugins {
-    id "us.kirchmeier.capsule" version '1.0.2'
+    id "us.kirchmeier.capsule" version "1.0.1"
-    id 'com.google.protobuf' version '0.8.1'
+    id 'com.google.protobuf' version '0.7.0'
 }
 
 apply plugin: 'java'
@@ -16,17 +16,18 @@ ext { isSnapshot = false }
 
 ext {
     groupId = 'org.factcenter.meerkat'
+    nexusRepository = "https://cs.idc.ac.il/nexus/content/groups/${isSnapshot ? 'unstable' : 'public'}/"
 
-    // Credentials for publishing repositories
+    // Credentials for IDC nexus repositories (needed only for using unstable repositories and publishing)
-    publishRepository = "https://cs.idc.ac.il/nexus/content/repositories/${project.isSnapshot ? 'snapshots' : 'releases'}"
+    // Should be set in ${HOME}/.gradle/gradle.properties
-    publishUser =  project.hasProperty('publishUser') ? project.property('publishUser') : ""
+    nexusUser =  project.hasProperty('nexusUser') ? project.property('nexusUser') : ""
-    publishPassword = project.hasProperty('publishPassword') ? project.property('publishPassword') : ""
+    nexusPassword = project.hasProperty('nexusPassword') ? project.property('nexusPassword') : ""
 }
 
 description = "Meerkat Voting Common Library"
 
 // Your project version
-version = "0.1"
+version = "0.0"
 
 version += "${isSnapshot ? '-SNAPSHOT' : ''}"
 
@@ -37,10 +38,23 @@ dependencies {
     compile project(':meerkat-common')
     compile project(':restful-api-common')
 
-
+    // Jersey for RESTful API
-    // Databases
+    compile 'org.glassfish.jersey.containers:jersey-container-servlet:2.22.+'
     compile 'org.xerial:sqlite-jdbc:3.7.+'
 
+    // Logging
+    compile 'org.slf4j:slf4j-api:1.7.7'
+    runtime 'ch.qos.logback:logback-classic:1.1.2'
+    runtime 'ch.qos.logback:logback-core:1.1.2'
+
+    // Google protobufs
+    compile 'com.google.protobuf:protobuf-java:3.+'
+
+    // Crypto
+    compile 'org.factcenter.qilin:qilin:1.1+'
+    compile 'org.bouncycastle:bcprov-jdk15on:1.53'
+    compile 'org.bouncycastle:bcpkix-jdk15on:1.53'
+
     // Depend on test resources from meerkat-common
     testCompile project(path: ':meerkat-common', configuration: 'testOutput')
 
@@ -49,11 +63,13 @@ dependencies {
 
     testCompile 'junit:junit:4.+'
     testCompile 'org.hamcrest:hamcrest-all:1.3'
+
+    runtime 'org.codehaus.groovy:groovy:2.4.+'
 }
 
 test {
     exclude '**/*IntegrationTest*'
-//    outputs.upToDateWhen { false }
+    outputs.upToDateWhen { false }
 }
 
 task integrationTest(type: Test) {
@@ -162,15 +178,28 @@ if (project.hasProperty('mainClassName') && (mainClassName != null)) {
  *===================================*/
 
 repositories {
-    // Use local repo if possible
+
     mavenLocal();
 
+    // Prefer the local nexus repository (it may have 3rd party artifacts not found in mavenCentral)
+    maven {
+        url nexusRepository
+
+        if (isSnapshot) {
+            credentials { username
+                password
+
+                username nexusUser
+                password nexusPassword
+            }
+        }
+    }
+
     // Use 'maven central' for other dependencies.
     mavenCentral()
 }
 
-task "info"  {
+task "info" << {
-    doLast {
     println "Project: ${project.name}"
     println "Description: ${project.description}"
     println "--------------------------"
@@ -178,7 +207,6 @@ task "info"  {
     println "Version: $version (${isSnapshot ? 'snapshot' : 'release'})"
     println ""
 }
-}
 info.description 'Print some information about project parameters'
 
 
@@ -199,12 +227,12 @@ publishing {
     }
     repositories {
         maven {
-            url publishRepository
+            url "https://cs.idc.ac.il/nexus/content/repositories/${project.isSnapshot ? 'snapshots' : 'releases'}"
             credentials { username
                 password
 
-                username publishUser
+                username nexusUser
-                password publishPassword
+                password nexusPassword
             }
         }
     }

bulletin-board-client/gradlew

@@ -1 +0,0 @@
-../gradlew

bulletin-board-client/src/main/java/meerkat/bulletinboard/BatchDataContainer.java

@@ -1,7 +1,7 @@
 package meerkat.bulletinboard;
 
-import meerkat.protobuf.BulletinBoardApi.BatchChunk;
+import com.google.protobuf.ByteString;
-import meerkat.bulletinboard.AsyncBulletinBoardClient.BatchIdentifier;
+import meerkat.protobuf.BulletinBoardAPI.BatchData;
 
 import java.util.List;
 
@@ -11,13 +11,15 @@ import java.util.List;
  */
 public class BatchDataContainer {
 
-    public final MultiServerBatchIdentifier batchId;
+    public final byte[] signerId;
-    public final List<BatchChunk> batchChunkList;
+    public final int batchId;
+    public final List<BatchData> batchDataList;
     public final int startPosition;
 
-    public BatchDataContainer(MultiServerBatchIdentifier batchId, List<BatchChunk> batchChunkList, int startPosition) {
+    public BatchDataContainer(byte[] signerId, int batchId, List<BatchData> batchDataList, int startPosition) {
+        this.signerId = signerId;
         this.batchId = batchId;
-        this.batchChunkList = batchChunkList;
+        this.batchDataList = batchDataList;
         this.startPosition = startPosition;
     }
 }

bulletin-board-client/src/main/java/meerkat/bulletinboard/CachedBulletinBoardClient.java

@@ -1,490 +1,168 @@
 package meerkat.bulletinboard;
 
 import com.google.common.util.concurrent.FutureCallback;
-import com.google.protobuf.Timestamp;
+import com.google.common.util.concurrent.ListeningScheduledExecutorService;
+import com.google.common.util.concurrent.MoreExecutors;
+import com.google.protobuf.ByteString;
 import meerkat.comm.CommunicationException;
-import meerkat.protobuf.BulletinBoardApi.*;
+import meerkat.protobuf.BulletinBoardAPI;
-import meerkat.protobuf.Crypto.Signature;
+import meerkat.protobuf.BulletinBoardAPI.*;
 import meerkat.protobuf.Voting.*;
 
+import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
+import java.util.concurrent.Executors;
 
 /**
  * Created by Arbel Deutsch Peled on 03-Mar-16.
  * This is a full-fledged implementation of a Bulletin Board Client
  * It provides asynchronous access to several remote servers, as well as a local cache
- * Read operations are performed on the local server
+ * Read/write operations are performed on the local server
- * Batch reads are performed on the local server and, if they fail, also on the remote servers
- * Write operations are performed on the local server
- * A Synchronizer is employed in order to keep the remote server up to date
  * After any read is carried out, a subscription is made for the specific query to make sure the local DB will be updated
  * The database also employs a synchronizer which makes sure local data is sent to the remote servers
  */
-public class CachedBulletinBoardClient implements SubscriptionBulletinBoardClient {
+public class CachedBulletinBoardClient implements SubscriptionAsyncBulletinBoardClient {
 
-    private final AsyncBulletinBoardClient localClient;
+    private final BulletinBoardClient localClient;
-    private final AsyncBulletinBoardClient remoteClient;
+    private AsyncBulletinBoardClient remoteClient;
-    private final AsyncBulletinBoardClient queueClient;
+    private BulletinBoardSubscriber subscriber;
-    private final BulletinBoardSubscriber subscriber;
-    private final BulletinBoardSynchronizer synchronizer;
 
-    private Thread syncThread;
+    private final int threadPoolSize;
+    private final long failDelayInMilliseconds;
+    private final long subscriptionIntervalInMilliseconds;
 
-    private final static int DEFAULT_WAIT_CAP = 3000;
+    public CachedBulletinBoardClient(BulletinBoardClient localClient,
-    private final static int DEFAULT_SLEEP_INTERVAL = 3000;
+                                     int threadPoolSize,
-
+                                     long failDelayInMilliseconds,
-    private class SubscriptionStoreCallback implements FutureCallback<List<BulletinBoardMessage>>  {
+                                     long subscriptionIntervalInMilliseconds)
-
+            throws IllegalAccessException, InstantiationException {
-        private final FutureCallback<List<BulletinBoardMessage>> callback;
-
-        public SubscriptionStoreCallback(){
-            callback = null;
-        }
-
-        public SubscriptionStoreCallback(FutureCallback<List<BulletinBoardMessage>> callback){
-            this.callback = callback;
-        }
-
-        @Override
-        public void onSuccess(List<BulletinBoardMessage> result) {
-            for (BulletinBoardMessage msg : result) {
-                try {
-
-                    if (msg.getMsg().getDataTypeCase() == UnsignedBulletinBoardMessage.DataTypeCase.MSGID) {
-
-                        // This is a batch message: need to upload batch data as well as the message itself
-                        BulletinBoardMessage completeMessage = localClient.readBatchData(msg);
-
-                        localClient.postMessage(completeMessage);
-
-                    } else {
-
-                        // This is a regular message: post it
-                        localClient.postMessage(msg);
-
-                    }
-
-                } catch (CommunicationException ignored) {
-                    // TODO: log
-                }
-            }
-        }
-
-        @Override
-        public void onFailure(Throwable t) {
-            if (callback != null) {
-                callback.onFailure(t);  // This is some hard error that cannot be dealt with
-            }
-        }
-
-    }
-
-    /**
-     * Creates a Cached Client
-     * Assumes all parameters are initialized
-     * @param localClient is a Client for the local instance
-     * @param remoteClient is a Client for the remote instance(s); Should have endless retries for post operations
-     * @param subscriber is a subscription service to the remote instance(s)
-     * @param queueClient is a client for a local deletable server to be used as a queue for not-yet-uploaded messages
-     */
-    public CachedBulletinBoardClient(AsyncBulletinBoardClient localClient,
-                                     AsyncBulletinBoardClient remoteClient,
-                                     BulletinBoardSubscriber subscriber,
-                                     DeletableSubscriptionBulletinBoardClient queueClient,
-                                     int sleepInterval,
-                                     int waitCap) {
 
         this.localClient = localClient;
-        this.remoteClient = remoteClient;
+        this.threadPoolSize = threadPoolSize;
-        this.subscriber = subscriber;
+        this.failDelayInMilliseconds = failDelayInMilliseconds;
-        this.queueClient = queueClient;
+        this.subscriptionIntervalInMilliseconds = subscriptionIntervalInMilliseconds;
 
-        this.synchronizer = new SimpleBulletinBoardSynchronizer(sleepInterval,waitCap);
+        remoteClient = new ThreadedBulletinBoardClient();
-        synchronizer.init(queueClient, remoteClient);
-        syncThread = new Thread(synchronizer);
-        syncThread.start();
-    }
-
-    /**
-     * Creates a Cached Client
-     * Used default values foe the time caps
-     * */
-    public CachedBulletinBoardClient(AsyncBulletinBoardClient localClient,
-                                     AsyncBulletinBoardClient remoteClient,
-                                     BulletinBoardSubscriber subscriber,
-                                     DeletableSubscriptionBulletinBoardClient queue) {
-
-        this(localClient, remoteClient, subscriber, queue, DEFAULT_SLEEP_INTERVAL, DEFAULT_WAIT_CAP);
-    }
-
-    @Override
-    public MessageID postMessage(final BulletinBoardMessage msg, final FutureCallback<Boolean> callback) {
-
-        return localClient.postMessage(msg, new FutureCallback<Boolean>() {
-            @Override
-            public void onSuccess(Boolean result) {
-                remoteClient.postMessage(msg, callback);
-            }
-
-            @Override
-            public void onFailure(Throwable t) {
-                if (callback != null)
-                    callback.onFailure(t);
-            }
-        });
 
     }
 
     @Override
-    public MessageID postAsBatch(final BulletinBoardMessage msg, final int chunkSize, final FutureCallback<Boolean> callback) {
+    public MessageID postMessage(BulletinBoardMessage msg, FutureCallback<Boolean> callback) {
-
+        return null;
-        return localClient.postAsBatch(msg, chunkSize, new FutureCallback<Boolean>() {
-            @Override
-            public void onSuccess(Boolean result) {
-                remoteClient.postAsBatch(msg, chunkSize, callback);
     }
 
     @Override
-            public void onFailure(Throwable t) {
+    public MessageID postBatch(CompleteBatch completeBatch, FutureCallback<Boolean> callback) {
-                if (callback != null)
+        return null;
-                    callback.onFailure(t);
     }
-        });
+
+    @Override
+    public void beginBatch(BeginBatchMessage beginBatchMessage, FutureCallback<Boolean> callback) {
 
     }
 
     @Override
-    public void beginBatch(final Iterable<String> tags, final FutureCallback<BatchIdentifier> callback) {
+    public void postBatchData(byte[] signerId, int batchId, List<BatchData> batchDataList, int startPosition, FutureCallback<Boolean> callback) {
-
-        localClient.beginBatch(tags, new FutureCallback<BatchIdentifier>() {
-
-            private BatchIdentifier localIdentifier;
-
-            @Override
-            public void onSuccess(BatchIdentifier result) {
-
-                localIdentifier = result;
-
-                remoteClient.beginBatch(tags, new FutureCallback<BatchIdentifier>() {
-                    @Override
-                    public void onSuccess(BatchIdentifier result) {
-                        if (callback != null)
-                            callback.onSuccess(new CachedClientBatchIdentifier(localIdentifier, result));
-                    }
-
-                    @Override
-                    public void onFailure(Throwable t) {
-                        if (callback != null)
-                            callback.onFailure(t);
-                    }
-                });
 
     }
 
     @Override
-            public void onFailure(Throwable t) {
+    public void postBatchData(byte[] signerId, int batchId, List<BatchData> batchDataList, FutureCallback<Boolean> callback) {
-                if (callback != null)
-                    callback.onFailure(t);
-            }
-        });
 
     }
 
     @Override
-    public void postBatchData(final BatchIdentifier batchIdentifier, final List<BatchChunk> batchChunkList,
+    public void postBatchData(ByteString signerId, int batchId, List<BatchData> batchDataList, int startPosition, FutureCallback<Boolean> callback) {
-                              final int startPosition, final FutureCallback<Boolean> callback) throws IllegalArgumentException{
-
-        if (!(batchIdentifier instanceof CachedClientBatchIdentifier)){
-            throw new IllegalArgumentException("Error: batch identifier supplied was not created by this class.");
-        }
-
-        final CachedClientBatchIdentifier identifier = (CachedClientBatchIdentifier) batchIdentifier;
-
-        localClient.postBatchData(identifier.getLocalIdentifier(), batchChunkList, startPosition, new FutureCallback<Boolean>() {
-            @Override
-            public void onSuccess(Boolean result) {
-                remoteClient.postBatchData(identifier.getRemoteIdentifier(), batchChunkList, startPosition, callback);
-            }
-
-            @Override
-            public void onFailure(Throwable t) {
-                if (callback != null)
-                    callback.onFailure(t);
-            }
-        });
 
     }
 
     @Override
-    public void postBatchData(final BatchIdentifier batchIdentifier, final List<BatchChunk> batchChunkList, final FutureCallback<Boolean> callback)
+    public void postBatchData(ByteString signerId, int batchId, List<BatchData> batchDataList, FutureCallback<Boolean> callback) {
-            throws IllegalArgumentException{
-
-        if (!(batchIdentifier instanceof CachedClientBatchIdentifier)){
-            throw new IllegalArgumentException("Error: batch identifier supplied was not created by this class.");
-        }
-
-        final CachedClientBatchIdentifier identifier = (CachedClientBatchIdentifier) batchIdentifier;
-
-        localClient.postBatchData(identifier.getLocalIdentifier(), batchChunkList, new FutureCallback<Boolean>() {
-            @Override
-            public void onSuccess(Boolean result) {
-                remoteClient.postBatchData(identifier.getRemoteIdentifier(), batchChunkList, callback);
-            }
-
-            @Override
-            public void onFailure(Throwable t) {
-                if (callback != null)
-                    callback.onFailure(t);
-            }
-        });
 
     }
 
     @Override
-    public void closeBatch(final BatchIdentifier batchIdentifier, final Timestamp timestamp, final Iterable<Signature> signatures,
+    public void closeBatch(CloseBatchMessage closeBatchMessage, FutureCallback<Boolean> callback) {
-                           final FutureCallback<Boolean> callback) {
-
-        if (!(batchIdentifier instanceof CachedClientBatchIdentifier)){
-            throw new IllegalArgumentException("Error: batch identifier supplied was not created by this class.");
-        }
-
-        final CachedClientBatchIdentifier identifier = (CachedClientBatchIdentifier) batchIdentifier;
-
-        localClient.closeBatch(identifier.getLocalIdentifier(), timestamp, signatures, new FutureCallback<Boolean>() {
-            @Override
-            public void onSuccess(Boolean result) {
-
-                remoteClient.closeBatch(identifier.getRemoteIdentifier(), timestamp, signatures, callback);
-
-            }
-
-            @Override
-            public void onFailure(Throwable t) {
-                if (callback != null)
-                    callback.onFailure(t);
-            }
-        });
 
     }
 
     @Override
     public void getRedundancy(MessageID id, FutureCallback<Float> callback) {
 
-        remoteClient.getRedundancy(id, callback);
+    }
+
+    @Override
+    public void readMessages(MessageFilterList filterList, FutureCallback<List<BulletinBoardMessage>> callback) {
 
     }
 
     @Override
-    public void readMessages(MessageFilterList filterList, final FutureCallback<List<BulletinBoardMessage>> callback) {
+    public void readBatch(BatchSpecificationMessage batchSpecificationMessage, FutureCallback<CompleteBatch> callback) {
-
-        localClient.readMessages(filterList, callback);
-
-        subscriber.subscribe(filterList, new SubscriptionStoreCallback(callback));
-
-    }
-
-    @Override
-    public void readMessage(final MessageID msgID, final FutureCallback<BulletinBoardMessage> callback) {
-
-        localClient.readMessage(msgID, new FutureCallback<BulletinBoardMessage>() {
-
-            @Override
-            public void onSuccess(BulletinBoardMessage result) {
-                if (callback != null)
-                    callback.onSuccess(result);     // Read from local client was successful
-            }
-
-            @Override
-            public void onFailure(Throwable t) {
-
-                // Read from local unsuccessful: try to read from remote
-
-                remoteClient.readMessage(msgID, new FutureCallback<BulletinBoardMessage>() {
-
-                    @Override
-                    public void onSuccess(BulletinBoardMessage result) {
-
-                        // Read from remote was successful: store in local and return result
-
-                        localClient.postMessage(result, null);
-
-                        if (callback != null)
-                            callback.onSuccess(result);
-
-                    }
-
-                    @Override
-                    public void onFailure(Throwable t) {
-
-                        // Read from remote was unsuccessful: report error
-                        if (callback != null)
-                            callback.onFailure(t);
-
-                    }
-
-                });
-
-            }
-
-        });
-
-    }
-
-    @Override
-    public void readBatchData(final BulletinBoardMessage stub, final FutureCallback<BulletinBoardMessage> callback) throws IllegalArgumentException {
-
-        localClient.readBatchData(stub, new FutureCallback<BulletinBoardMessage>() {
-
-            @Override
-            public void onSuccess(BulletinBoardMessage result) {
-                if (callback != null)
-                    callback.onSuccess(result);     // Read from local client was successful
-            }
-
-            @Override
-            public void onFailure(Throwable t) {
-
-                // Read from local unsuccessful: try to read from remote
-
-                remoteClient.readBatchData(stub, new FutureCallback<BulletinBoardMessage>() {
-
-                    @Override
-                    public void onSuccess(BulletinBoardMessage result) {
-
-                        // Read from remote was successful: store in local and return result
-
-                        localClient.postMessage(result, null);
-
-                        if (callback != null)
-                            callback.onSuccess(result);
-
-                    }
-
-                    @Override
-                    public void onFailure(Throwable t) {
-
-                        // Read from remote was unsuccessful: report error
-                        if (callback != null)
-                            callback.onFailure(t);
-
-                    }
-
-                });
-
-            }
-
-        });
 
     }
 
     @Override
     public void querySync(SyncQuery syncQuery, FutureCallback<SyncQueryResponse> callback) {
 
-        localClient.querySync(syncQuery, callback);
-
     }
 
     @Override
-    /**
+    public void init(BulletinBoardClientParams clientParams) {
-     * This is a stub method
-     * All resources are assumed to be initialized
-     */
-    public void init(BulletinBoardClientParams clientParams) {}
 
-    @Override
+        remoteClient.init(clientParams);
-    public MessageID postMessage(BulletinBoardMessage msg) throws CommunicationException {
-        return localClient.postMessage(msg);
-    }
 
-    @Override
+        ListeningScheduledExecutorService executorService = MoreExecutors.listeningDecorator(Executors.newScheduledThreadPool(threadPoolSize));
-    public MessageID postAsBatch(BulletinBoardMessage msg, int chunkSize) throws CommunicationException {
-        MessageID result = localClient.postAsBatch(msg, chunkSize);
-        remoteClient.postAsBatch(msg, chunkSize);
-        return  result;
-    }
 
-    @Override
+        List<SubscriptionAsyncBulletinBoardClient> subscriberClients = new ArrayList<>(clientParams.getBulletinBoardAddressCount());
-    public float getRedundancy(MessageID id) throws CommunicationException {
-        return remoteClient.getRedundancy(id);
-    }
 
-    @Override
+        for (String address : clientParams.getBulletinBoardAddressList()){
-    public List<BulletinBoardMessage> readMessages(MessageFilterList filterList) throws CommunicationException {
-        subscriber.subscribe(filterList, new SubscriptionStoreCallback());
-        return localClient.readMessages(filterList);
-    }
 
-    @Override
+            SubscriptionAsyncBulletinBoardClient newClient =
-    public BulletinBoardMessage readMessage(MessageID msgID) throws CommunicationException {
+                    new SingleServerBulletinBoardClient(executorService, failDelayInMilliseconds, subscriptionIntervalInMilliseconds);
 
-        BulletinBoardMessage result = null;
+            newClient.init(clientParams.toBuilder().clearBulletinBoardAddress().addBulletinBoardAddress(address).build());
-        try {
-            result = localClient.readMessage(msgID);
-        } catch (CommunicationException e) {
-            //TODO: log
-        }
 
-        if (result == null){
+            subscriberClients.add(newClient);
-            result = remoteClient.readMessage(msgID);
-
-            if (result != null){
-                localClient.postMessage(result);
-            }
 
         }
 
-        return result;
+        subscriber = new ThreadedBulletinBoardSubscriber(subscriberClients, localClient);
 
     }
 
     @Override
-    public BulletinBoardMessage readBatchData(BulletinBoardMessage stub) throws CommunicationException, IllegalArgumentException {
+    public MessageID postMessage(BulletinBoardMessage msg) throws CommunicationException {
-
+        return null;
-        BulletinBoardMessage result = null;
-        try {
-            result = localClient.readBatchData(stub);
-        } catch (CommunicationException e) {
-            //TODO: log
-        }
-
-        if (result == null){
-            result = remoteClient.readBatchData(stub);
-
-            if (result != null){
-                localClient.postMessage(result);
-            }
-
-        }
-
-        return result;
-
     }
 
     @Override
-    public SyncQuery generateSyncQuery(GenerateSyncQueryParams generateSyncQueryParams) throws CommunicationException {
+    public float getRedundancy(MessageID id) {
-        return localClient.generateSyncQuery(generateSyncQueryParams);
+        return 0;
+    }
+
+    @Override
+    public List<BulletinBoardMessage> readMessages(MessageFilterList filterList) {
+        return null;
+    }
+
+    @Override
+    public SyncQuery generateSyncQuery(GenerateSyncQueryParams GenerateSyncQueryParams) throws CommunicationException {
+        return null;
     }
 
     @Override
     public void close() {
-        localClient.close();
+
-        remoteClient.close();
-        synchronizer.stop();
-        try {
-            syncThread.join();
-        } catch (InterruptedException e) {
-            //TODO: log interruption
-        }
     }
 
     @Override
     public void subscribe(MessageFilterList filterList, FutureCallback<List<BulletinBoardMessage>> callback) {
-        subscriber.subscribe(filterList, new SubscriptionStoreCallback(callback));
+
     }
 
     @Override
     public void subscribe(MessageFilterList filterList, long startEntry, FutureCallback<List<BulletinBoardMessage>> callback) {
-        subscriber.subscribe(filterList, startEntry, new SubscriptionStoreCallback(callback));
-    }
 
     }
+}

bulletin-board-client/src/main/java/meerkat/bulletinboard/CachedClientBatchIdentifier.java

@@ -1,29 +0,0 @@
-package meerkat.bulletinboard;
-
-import meerkat.bulletinboard.AsyncBulletinBoardClient.BatchIdentifier;
-
-import java.util.Arrays;
-
-/**
- * Created by Arbel Deutsch Peled on 17-Jun-16.
- */
-public final class CachedClientBatchIdentifier implements BatchIdentifier {
-
-    // Per-server identifiers
-    private final BatchIdentifier localIdentifier;
-    private final BatchIdentifier remoteIdentifier;
-
-    public CachedClientBatchIdentifier(BatchIdentifier localIdentifier, BatchIdentifier remoteIdentifier) {
-        this.localIdentifier = localIdentifier;
-        this.remoteIdentifier = remoteIdentifier;
-    }
-
-    public BatchIdentifier getLocalIdentifier() {
-        return localIdentifier;
-    }
-
-    public BatchIdentifier getRemoteIdentifier() {
-        return remoteIdentifier;
-    }
-
-}

bulletin-board-client/src/main/java/meerkat/bulletinboard/LocalBulletinBoardClient.java

@@ -1,21 +1,20 @@
 package meerkat.bulletinboard;
 
 import com.google.common.util.concurrent.*;
-import com.google.protobuf.Int64Value;
+import com.google.protobuf.ByteString;
-import com.google.protobuf.Timestamp;
 import meerkat.comm.CommunicationException;
 import meerkat.comm.MessageInputStream;
 import meerkat.comm.MessageInputStream.MessageInputStreamFactory;
 import meerkat.comm.MessageOutputStream;
 import meerkat.crypto.concrete.SHA256Digest;
-import meerkat.protobuf.BulletinBoardApi.*;
+import meerkat.protobuf.BulletinBoardAPI.*;
-import meerkat.protobuf.Crypto.Signature;
 import meerkat.protobuf.Voting.*;
 import meerkat.util.BulletinBoardUtils;
 
 import javax.ws.rs.NotFoundException;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
+import java.util.Arrays;
 import java.util.List;
 import java.util.concurrent.Callable;
 import java.util.concurrent.Executors;
@@ -23,27 +22,28 @@ import java.util.concurrent.TimeUnit;
 
 /**
  * Created by Arbel Deutsch Peled on 15-Mar-16.
- * This client wraps a BulletinBoardServer in an asynchronous client.
+ * This client is to be used mainly for testing.
- * It is meant to be used as a local cache handler and for testing purposes.
+ * It wraps a BulletinBoardServer in an asynchronous client.
  * This means the access to the server is direct (via method calls) instead of through a TCP connection.
  * The client implements both synchronous and asynchronous method calls, but calls to the server itself are performed synchronously.
  */
-public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBoardClient {
+public class LocalBulletinBoardClient implements SubscriptionAsyncBulletinBoardClient{
 
-    private final DeletableBulletinBoardServer server;
+    private final BulletinBoardServer server;
     private final ListeningScheduledExecutorService executorService;
-    private final BulletinBoardDigest digest;
+    private final BatchDigest digest;
-    private final long subsrciptionDelay;
+    private final int subsrciptionDelay;
 
     /**
      * Initializes an instance of the client
      * @param server an initialized Bulletin Board Server instance which will perform the actual processing of the requests
      * @param threadNum is the number of concurrent threads to allocate for the client
+     * @param subscriptionDelay is the required delay between subscription calls in milliseconds
      */
-    public LocalBulletinBoardClient(DeletableBulletinBoardServer server, int threadNum, int subscriptionDelay) {
+    public LocalBulletinBoardClient(BulletinBoardServer server, int threadNum, int subscriptionDelay) {
         this.server = server;
         this.executorService = MoreExecutors.listeningDecorator(Executors.newScheduledThreadPool(threadNum));
-        this.digest = new GenericBulletinBoardDigest(new SHA256Digest());
+        this.digest = new GenericBatchDigest(new SHA256Digest());
         this.subsrciptionDelay = subscriptionDelay;
     }
 
@@ -57,7 +57,7 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
 
 
         @Override
-        public Boolean call() throws CommunicationException {
+        public Boolean call() throws Exception {
             return server.postMessage(msg).getValue();
         }
 
@@ -75,57 +75,51 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
 
     private class CompleteBatchPoster implements Callable<Boolean> {
 
-        private final BulletinBoardMessage msg;
+        private final CompleteBatch completeBatch;
-        private final int chunkSize;
 
-        public CompleteBatchPoster(BulletinBoardMessage msg, int chunkSize) {
+        public CompleteBatchPoster(CompleteBatch completeBatch) {
-            this.msg = msg;
+            this.completeBatch = completeBatch;
-            this.chunkSize = chunkSize;
         }
 
 
         @Override
-        public Boolean call() throws CommunicationException {
+        public Boolean call() throws Exception {
 
-            BeginBatchMessage beginBatchMessage = BeginBatchMessage.newBuilder()
+            if (!server.beginBatch(completeBatch.getBeginBatchMessage()).getValue())
-                    .addAllTag(msg.getMsg().getTagList())
+                return false;
-                    .build();
-
-            Int64Value batchId = server.beginBatch(beginBatchMessage);
-
-            BatchMessage.Builder builder = BatchMessage.newBuilder()
-                    .setBatchId(batchId.getValue());
-
-            List<BatchChunk> batchChunkList = BulletinBoardUtils.breakToBatch(msg, chunkSize);
 
             int i=0;
-            for (BatchChunk chunk : batchChunkList){
+            for (BatchData data : completeBatch.getBatchDataList()){
 
-                server.postBatchMessage(builder.setSerialNum(i).setData(chunk).build());
+                BatchMessage message = BatchMessage.newBuilder()
+                        .setSignerId(completeBatch.getSignature().getSignerId())
+                        .setBatchId(completeBatch.getBeginBatchMessage().getBatchId())
+                        .setSerialNum(i)
+                        .setData(data)
+                        .build();
+
+                if (!server.postBatchMessage(message).getValue())
+                    return false;
 
                 i++;
-
             }
 
-            CloseBatchMessage closeBatchMessage = BulletinBoardUtils.generateCloseBatchMessage(batchId, batchChunkList.size(), msg);
+            return server.closeBatchMessage(completeBatch.getCloseBatchMessage()).getValue();
-
-            return server.closeBatch(closeBatchMessage).getValue();
         }
 
     }
 
     @Override
-    public MessageID postAsBatch(BulletinBoardMessage msg, int chunkSize, FutureCallback<Boolean> callback) {
+    public MessageID postBatch(CompleteBatch completeBatch, FutureCallback<Boolean> callback) {
 
-        Futures.addCallback(executorService.submit(new CompleteBatchPoster(msg, chunkSize)), callback);
+        Futures.addCallback(executorService.schedule(new CompleteBatchPoster(completeBatch), subsrciptionDelay, TimeUnit.MILLISECONDS), callback);
 
-        digest.reset();
+        digest.update(completeBatch);
-        digest.update(msg);
         return digest.digestAsMessageID();
 
     }
 
-    private class BatchBeginner implements Callable<SingleServerBatchIdentifier> {
+    private class BatchBeginner implements Callable<Boolean> {
 
         private final BeginBatchMessage msg;
 
@@ -135,31 +129,28 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
 
 
         @Override
-        public SingleServerBatchIdentifier call() throws Exception {
+        public Boolean call() throws Exception {
-            return new SingleServerBatchIdentifier(server.beginBatch(msg));
+            return server.beginBatch(msg).getValue();
         }
 
     }
 
     @Override
-    public void beginBatch(Iterable<String> tags, FutureCallback<BatchIdentifier> callback) {
+    public void beginBatch(BeginBatchMessage beginBatchMessage, FutureCallback<Boolean> callback) {
-
-        BeginBatchMessage beginBatchMessage = BeginBatchMessage.newBuilder()
-                .addAllTag(tags)
-                .build();
-
         Futures.addCallback(executorService.submit(new BatchBeginner(beginBatchMessage)), callback);
     }
 
     private class BatchDataPoster implements Callable<Boolean> {
 
-        private final SingleServerBatchIdentifier batchId;
+        private final ByteString signerId;
-        private final List<BatchChunk> batchChunkList;
+        private final int batchId;
+        private final List<BatchData> batchDataList;
         private final int startPosition;
 
-        public BatchDataPoster(SingleServerBatchIdentifier batchId, List<BatchChunk> batchChunkList, int startPosition) {
+        public BatchDataPoster(ByteString signerId, int batchId, List<BatchData> batchDataList, int startPosition) {
+            this.signerId = signerId;
             this.batchId = batchId;
-            this.batchChunkList = batchChunkList;
+            this.batchDataList = batchDataList;
             this.startPosition = startPosition;
         }
 
@@ -168,10 +159,11 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
         public Boolean call() throws Exception {
 
             BatchMessage.Builder msgBuilder = BatchMessage.newBuilder()
-                    .setBatchId(batchId.getBatchId().getValue());
+                    .setSignerId(signerId)
+                    .setBatchId(batchId);
 
             int i = startPosition;
-            for (BatchChunk data : batchChunkList){
+            for (BatchData data : batchDataList){
 
                 msgBuilder.setSerialNum(i)
                         .setData(data);
@@ -183,8 +175,6 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
 
             }
 
-            batchId.setLength(i);
-
             return true;
 
         }
@@ -192,28 +182,24 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
     }
 
     @Override
-    public void postBatchData(BatchIdentifier batchId, List<BatchChunk> batchChunkList, int startPosition, FutureCallback<Boolean> callback)
+    public void postBatchData(byte[] signerId, int batchId, List<BatchData> batchDataList, int startPosition, FutureCallback<Boolean> callback) {
-        throws IllegalArgumentException{
+        postBatchData(ByteString.copyFrom(signerId), batchId, batchDataList, startPosition, callback);
-
-        // Cast identifier to usable form
-
-        if (!(batchId instanceof SingleServerBatchIdentifier)){
-            throw new IllegalArgumentException("Error: batch identifier supplied was not created by this class.");
-        }
-
-        SingleServerBatchIdentifier identifier = (SingleServerBatchIdentifier) batchId;
-
-        // Add worker
-
-        Futures.addCallback(executorService.submit(new BatchDataPoster(identifier, batchChunkList, startPosition)), callback);
-
     }
 
     @Override
-    public void postBatchData(BatchIdentifier batchId, List<BatchChunk> batchChunkList, FutureCallback<Boolean> callback) throws IllegalArgumentException{
+    public void postBatchData(byte[] signerId, int batchId, List<BatchData> batchDataList, FutureCallback<Boolean> callback) {
-        postBatchData(batchId, batchChunkList, 0, callback);
+        postBatchData(signerId, batchId, batchDataList, 0, callback);
     }
 
+    @Override
+    public void postBatchData(ByteString signerId, int batchId, List<BatchData> batchDataList, int startPosition, FutureCallback<Boolean> callback) {
+        Futures.addCallback(executorService.submit(new BatchDataPoster(signerId, batchId, batchDataList, startPosition)), callback);
+    }
+
+    @Override
+    public void postBatchData(ByteString signerId, int batchId, List<BatchData> batchDataList, FutureCallback<Boolean> callback) {
+        postBatchData(signerId, batchId, batchDataList, 0, callback);
+    }
 
     private class BatchCloser implements Callable<Boolean> {
 
@@ -226,33 +212,14 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
 
         @Override
         public Boolean call() throws Exception {
-            return server.closeBatch(msg).getValue();
+            return server.closeBatchMessage(msg).getValue();
         }
 
     }
 
     @Override
-    public void closeBatch(BatchIdentifier batchId, Timestamp timestamp, Iterable<Signature> signatures, FutureCallback<Boolean> callback) {
+    public void closeBatch(CloseBatchMessage closeBatchMessage, FutureCallback<Boolean> callback) {
-
-        // Cast identifier to usable form
-
-        if (!(batchId instanceof SingleServerBatchIdentifier)){
-            throw new IllegalArgumentException("Error: batch identifier supplied was not created by this class.");
-        }
-
-        SingleServerBatchIdentifier identifier = (SingleServerBatchIdentifier) batchId;
-
-        // Add worker
-
-        CloseBatchMessage closeBatchMessage = CloseBatchMessage.newBuilder()
-                .setBatchId(identifier.getBatchId().getValue())
-                .setBatchLength(identifier.getLength())
-                .setTimestamp(timestamp)
-                .addAllSig(signatures)
-                .build();
-
         Futures.addCallback(executorService.submit(new BatchCloser(closeBatchMessage)), callback);
-
     }
 
     private class RedundancyGetter implements Callable<Float> {
@@ -343,7 +310,6 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
         public void onSuccess(List<BulletinBoardMessage> result) {
 
             // Report new messages to user
-            if (callback != null)
             callback.onSuccess(result);
 
             MessageFilterList.Builder filterBuilder = filterList.toBuilder();
@@ -365,7 +331,7 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
             filterList = filterBuilder.build();
 
             // Reschedule job
-            Futures.addCallback(executorService.schedule(new MessageReader(filterList), subsrciptionDelay, TimeUnit.MILLISECONDS), this);
+            Futures.addCallback(executorService.submit(new MessageReader(filterList)), this);
 
         }
 
@@ -373,7 +339,6 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
         public void onFailure(Throwable t) {
 
             // Notify caller about failure and terminate subscription
-            if (callback != null)
             callback.onFailure(t);
 
         }
@@ -399,122 +364,83 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
         subscribe(filterList, 0, callback);
     }
 
-    private class BatchDataReader implements Callable<List<BatchChunk>> {
+    private class CompleteBatchReader implements Callable<CompleteBatch> {
 
-        private final MessageID msgID;
+        private final BatchSpecificationMessage batchSpecificationMessage;
 
-        public BatchDataReader(MessageID msgID) {
+        public CompleteBatchReader(BatchSpecificationMessage batchSpecificationMessage) {
-            this.msgID = msgID;
+            this.batchSpecificationMessage = batchSpecificationMessage;
         }
 
-        @Override
-        public List<BatchChunk> call() throws Exception {
 
-            BatchQuery batchQuery = BatchQuery.newBuilder()
+        @Override
-                    .setMsgID(msgID)
+        public CompleteBatch call() throws Exception {
-                    .setStartPosition(0)
+
-                    .build();
+            final String[] TAGS_TO_REMOVE = {BulletinBoardConstants.BATCH_TAG, BulletinBoardConstants.BATCH_ID_TAG_PREFIX};
+
+            CompleteBatch completeBatch = new CompleteBatch(BeginBatchMessage.newBuilder()
+                    .setSignerId(batchSpecificationMessage.getSignerId())
+                    .setBatchId(batchSpecificationMessage.getBatchId())
+                    .build());
 
             ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream();
-            MessageOutputStream<BatchChunk> batchOutputStream = new MessageOutputStream<>(byteOutputStream);
+            MessageOutputStream<BatchData> batchOutputStream = new MessageOutputStream<>(byteOutputStream);
-            server.readBatch(batchQuery,batchOutputStream);
+            server.readBatch(batchSpecificationMessage,batchOutputStream);
 
-            MessageInputStream<BatchChunk> inputStream =
+            MessageInputStream<BatchData> batchInputStream =
                     MessageInputStreamFactory.createMessageInputStream(
                             new ByteArrayInputStream(byteOutputStream.toByteArray()),
-                            BatchChunk.class);
+                            BatchData.class);
 
-            return inputStream.asList();
+            completeBatch.appendBatchData(batchInputStream.asList());
-
-        }
-    }
-
-    private class CompleteBatchReader implements Callable<BulletinBoardMessage> {
-
-        private final MessageID msgID;
-
-        public CompleteBatchReader(MessageID msgID) {
-            this.msgID = msgID;
-        }
-
-
-        @Override
-        public BulletinBoardMessage call() throws Exception {
-
-            // Read message (mat be a stub)
 
             MessageFilterList filterList = MessageFilterList.newBuilder()
                     .addFilter(MessageFilter.newBuilder()
-                            .setType(FilterType.MSG_ID)
+                            .setType(FilterType.TAG)
-                            .setId(msgID.getID())
+                            .setTag(BulletinBoardConstants.BATCH_TAG)
+                            .build())
+                    .addFilter(MessageFilter.newBuilder()
+                            .setType(FilterType.TAG)
+                            .setTag(BulletinBoardConstants.BATCH_ID_TAG_PREFIX + completeBatch.getBeginBatchMessage().getBatchId())
+                            .build())
+                    .addFilter(MessageFilter.newBuilder()
+                            .setType(FilterType.SIGNER_ID)
+                            .setId(completeBatch.getBeginBatchMessage().getSignerId())
                             .build())
                     .build();
 
-            MessageReader messageReader = new MessageReader(filterList);
+            byteOutputStream = new ByteArrayOutputStream();
-            List<BulletinBoardMessage> bulletinBoardMessages = messageReader.call();
+            MessageOutputStream<BulletinBoardMessage> messageOutputStream = new MessageOutputStream<>(byteOutputStream);
+            server.readMessages(filterList,messageOutputStream);
 
-            if (bulletinBoardMessages.size() <= 0) {
+            MessageInputStream<BulletinBoardMessage> messageInputStream =
-                throw new NotFoundException("Message does not exist");
+                    MessageInputStreamFactory.createMessageInputStream(
-            }
+                            new ByteArrayInputStream(byteOutputStream.toByteArray()),
+                            BulletinBoardMessage.class);
 
-            BulletinBoardMessage msg = bulletinBoardMessages.get(0);
+            if (!messageInputStream.isAvailable())
+                throw new NotFoundException("Batch does not exist");
 
-            if (msg.getMsg().getDataTypeCase() == UnsignedBulletinBoardMessage.DataTypeCase.MSGID) {
+            BulletinBoardMessage message = messageInputStream.readMessage();
 
-                // Read data
+            completeBatch.setBeginBatchMessage(BeginBatchMessage.newBuilder()
+                    .addAllTag(BulletinBoardUtils.removePrefixTags(message, Arrays.asList(TAGS_TO_REMOVE)))
+                    .setSignerId(message.getSig(0).getSignerId())
+                    .setBatchId(Integer.parseInt(BulletinBoardUtils.findTagWithPrefix(message, BulletinBoardConstants.BATCH_ID_TAG_PREFIX)))
+                    .build());
 
-                BatchDataReader batchDataReader = new BatchDataReader(msgID);
+            completeBatch.setSignature(message.getSig(0));
-                List<BatchChunk> batchChunkList = batchDataReader.call();
+            completeBatch.setTimestamp(message.getMsg().getTimestamp());
 
-                // Combine and return
+            return completeBatch;
-
-                return BulletinBoardUtils.gatherBatch(msg, batchChunkList);
-
-            } else {
-                return msg;
-            }
-
-        }
-
-    }
-
-    private class BatchDataCombiner implements Callable<BulletinBoardMessage> {
-
-        private final BulletinBoardMessage stub;
-
-        public BatchDataCombiner(BulletinBoardMessage stub) {
-            this.stub = stub;
-        }
-
-        @Override
-        public BulletinBoardMessage call() throws Exception {
-
-            MessageID msgID = MessageID.newBuilder().setID(stub.getMsg().getMsgId()).build();
-
-            BatchDataReader batchDataReader = new BatchDataReader(msgID);
-
-            List<BatchChunk> batchChunkList = batchDataReader.call();
-
-            return BulletinBoardUtils.gatherBatch(stub, batchChunkList);
 
         }
 
     }
 
     @Override
-    public void readMessage(MessageID msgID, FutureCallback<BulletinBoardMessage> callback) {
+    public void readBatch(BatchSpecificationMessage batchSpecificationMessage, FutureCallback<CompleteBatch> callback) {
-        Futures.addCallback(executorService.submit(new CompleteBatchReader(msgID)), callback);
+        Futures.addCallback(executorService.submit(new CompleteBatchReader(batchSpecificationMessage)), callback);
-    }
-
-    @Override
-    public void readBatchData(BulletinBoardMessage stub, FutureCallback<BulletinBoardMessage> callback) throws IllegalArgumentException {
-
-        if (stub.getMsg().getDataTypeCase() != UnsignedBulletinBoardMessage.DataTypeCase.MSGID){
-            throw new IllegalArgumentException("Message is not a stub and does not contain the required message ID");
-        }
-
-        Futures.addCallback(executorService.submit(new BatchDataCombiner(stub)),callback);
-
     }
 
     private class SyncQueryHandler implements Callable<SyncQueryResponse> {
@@ -548,27 +474,18 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
     @Override
     public MessageID postMessage(BulletinBoardMessage msg) throws CommunicationException {
 
+        try {
+
             MessagePoster poster = new MessagePoster(msg);
             poster.call();
 
-            digest.update(msg.getMsg());
-            return digest.digestAsMessageID();
-
-    }
-
-    @Override
-    public MessageID postAsBatch(BulletinBoardMessage msg, int chunkSize) throws CommunicationException {
-
-        CompleteBatchPoster poster = new CompleteBatchPoster(msg, chunkSize);
-        Boolean result = poster.call();
-
-        if (!result)
-            throw new CommunicationException("Batch post failed");
-
-        digest.reset();
             digest.update(msg);
             return digest.digestAsMessageID();
 
+        } catch (Exception e) {
+            return null;
+        }
+
     }
 
     @Override
@@ -586,7 +503,7 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
     }
 
     @Override
-    public List<BulletinBoardMessage> readMessages(MessageFilterList filterList) throws CommunicationException{
+    public List<BulletinBoardMessage> readMessages(MessageFilterList filterList) {
 
         try {
 
@@ -594,89 +511,14 @@ public class LocalBulletinBoardClient implements DeletableSubscriptionBulletinBo
             return reader.call();
 
         } catch (Exception e){
-            throw new CommunicationException("Error reading from server");
+            return null;
         }
 
     }
 
     @Override
-    public BulletinBoardMessage readMessage(MessageID msgID) throws CommunicationException {
+    public SyncQuery generateSyncQuery(GenerateSyncQueryParams GenerateSyncQueryParams) throws CommunicationException {
-
+        return server.generateSyncQuery(GenerateSyncQueryParams);
-        MessageFilterList filterList = MessageFilterList.newBuilder()
-                .addFilter(MessageFilter.newBuilder()
-                        .setType(FilterType.MSG_ID)
-                        .setId(msgID.getID())
-                        .build())
-                .build();
-
-        CompleteBatchReader completeBatchReader = new CompleteBatchReader(msgID);
-
-        try {
-            return completeBatchReader.call();
-        } catch (Exception e) {
-            throw new CommunicationException(e.getMessage() + " " + e.getMessage());
-        }
-
-    }
-
-    @Override
-    public BulletinBoardMessage readBatchData(BulletinBoardMessage stub) throws CommunicationException, IllegalArgumentException {
-
-        if (stub.getMsg().getDataTypeCase() != UnsignedBulletinBoardMessage.DataTypeCase.MSGID){
-            throw new IllegalArgumentException("Message is not a stub and does not contain the required message ID");
-        }
-
-        BatchDataCombiner combiner = new BatchDataCombiner(stub);
-
-        try {
-            return combiner.call();
-        } catch (Exception e) {
-            throw new CommunicationException(e.getCause() + " " + e.getMessage());
-        }
-
-    }
-
-    @Override
-    public SyncQuery generateSyncQuery(GenerateSyncQueryParams generateSyncQueryParams) throws CommunicationException {
-        return server.generateSyncQuery(generateSyncQueryParams);
-    }
-
-    @Override
-    public void deleteMessage(MessageID msgID, FutureCallback<Boolean> callback) {
-
-        try {
-            Boolean deleted = server.deleteMessage(msgID).getValue();
-            if (callback != null)
-                callback.onSuccess(deleted);
-        } catch (CommunicationException e) {
-            if (callback != null)
-                callback.onFailure(e);
-        }
-
-    }
-
-    @Override
-    public void deleteMessage(long entryNum, FutureCallback<Boolean> callback) {
-
-        try {
-            Boolean deleted = server.deleteMessage(entryNum).getValue();
-            if (callback != null)
-                callback.onSuccess(deleted);
-        } catch (CommunicationException e) {
-            if (callback != null)
-                callback.onFailure(e);
-        }
-
-    }
-
-    @Override
-    public boolean deleteMessage(MessageID msgID) throws CommunicationException {
-        return server.deleteMessage(msgID).getValue();
-    }
-
-    @Override
-    public boolean deleteMessage(long entryNum) throws CommunicationException {
-        return server.deleteMessage(entryNum).getValue();
     }
 
     @Override

bulletin-board-client/src/main/java/meerkat/bulletinboard/MultiServerBatchIdentifier.java

@@ -1,27 +0,0 @@
-package meerkat.bulletinboard;
-
-import meerkat.bulletinboard.AsyncBulletinBoardClient.BatchIdentifier;
-
-import java.util.Arrays;
-
-/**
- * Created by Arbel Deutsch Peled on 17-Jun-16.
- */
-public final class MultiServerBatchIdentifier implements AsyncBulletinBoardClient.BatchIdentifier {
-
-    // Per-server identifiers
-    private final Iterable<BatchIdentifier> identifiers;
-
-    public MultiServerBatchIdentifier(Iterable<BatchIdentifier> identifiers) {
-        this.identifiers = identifiers;
-    }
-
-    public MultiServerBatchIdentifier(BatchIdentifier[] identifiers) {
-        this.identifiers = Arrays.asList(identifiers);
-    }
-
-    public Iterable<BatchIdentifier> getIdentifiers() {
-        return identifiers;
-    }
-
-}

bulletin-board-client/src/main/java/meerkat/bulletinboard/MultiServerWorker.java

@@ -18,7 +18,7 @@ import java.util.concurrent.atomic.AtomicInteger;
  */
 public abstract class MultiServerWorker<IN, OUT> extends BulletinClientWorker<IN> implements Runnable, FutureCallback<OUT>{
 
-    protected final List<SingleServerBulletinBoardClient> clients;
+    private final List<SingleServerBulletinBoardClient> clients;
 
     protected AtomicInteger minServers; // The minimal number of servers the job must be successful on for the job to be completed
 
@@ -74,7 +74,6 @@ public abstract class MultiServerWorker<IN, OUT> extends BulletinClientWorker<IN
      */
     protected void succeed(OUT result){
         if (returnedResult.compareAndSet(false, true)) {
-            if (futureCallback != null)
             futureCallback.onSuccess(result);
         }
     }
@@ -86,11 +85,18 @@ public abstract class MultiServerWorker<IN, OUT> extends BulletinClientWorker<IN
      */
     protected void fail(Throwable t){
         if (returnedResult.compareAndSet(false, true)) {
-            if (futureCallback != null)
             futureCallback.onFailure(t);
         }
     }
 
+    /**
+     * Used by implementations to get a Single Server Client iterator
+     * @return the requested iterator
+     */
+    protected Iterator<SingleServerBulletinBoardClient> getClientIterator() {
+        return clients.iterator();
+    }
+
     protected int getClientNumber() {
         return clients.size();
     }

bulletin-board-client/src/main/java/meerkat/bulletinboard/SimpleBulletinBoardClient.java

@@ -1,17 +1,21 @@
 package meerkat.bulletinboard;
 
-import com.google.protobuf.BoolValue;
 import com.google.protobuf.ByteString;
-import com.google.protobuf.Int64Value;
+import com.google.protobuf.Timestamp;
-import meerkat.bulletinboard.workers.singleserver.*;
 import meerkat.comm.CommunicationException;
+import meerkat.comm.MessageInputStream;
+import meerkat.crypto.Digest;
 import meerkat.crypto.concrete.SHA256Digest;
-import meerkat.protobuf.BulletinBoardApi;
+import meerkat.protobuf.BulletinBoardAPI;
-import meerkat.protobuf.BulletinBoardApi.*;
+import meerkat.protobuf.BulletinBoardAPI.*;
 import meerkat.protobuf.Voting.*;
 import meerkat.rest.*;
-import meerkat.util.BulletinBoardUtils;
 
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.reflect.InvocationTargetException;
+import java.util.Collection;
+import java.util.Iterator;
 import java.util.List;
 
 import javax.ws.rs.client.Client;
@@ -32,7 +36,7 @@ public class SimpleBulletinBoardClient implements BulletinBoardClient{
 
     protected Client client;
 
-    protected BulletinBoardDigest digest;
+    protected Digest digest;
 
     /**
      * Stores database locations and initializes the web Client
@@ -47,8 +51,7 @@ public class SimpleBulletinBoardClient implements BulletinBoardClient{
         client.register(ProtobufMessageBodyReader.class);
         client.register(ProtobufMessageBodyWriter.class);
 
-        // Wrap the Digest into a BatchDigest
+        digest = new SHA256Digest();
-        digest = new GenericBulletinBoardDigest(new SHA256Digest());
 
     }
 
@@ -63,16 +66,19 @@ public class SimpleBulletinBoardClient implements BulletinBoardClient{
     public MessageID postMessage(BulletinBoardMessage msg) throws CommunicationException {
 
         WebTarget webTarget;
-        Response response = null;
+        Response response;
 
         // Post message to all databases
         try {
             for (String db : meerkatDBs) {
+                webTarget = client.target(db).path(BULLETIN_BOARD_SERVER_PATH).path(POST_MESSAGE_PATH);
+                response = webTarget.request(Constants.MEDIATYPE_PROTOBUF).post(Entity.entity(msg, Constants.MEDIATYPE_PROTOBUF));
 
-                SingleServerPostMessageWorker worker = new SingleServerPostMessageWorker(db, msg, 0);
+                // Only consider valid responses
-
+                if (response.getStatusInfo() == Response.Status.OK
-                worker.call();
+                        || response.getStatusInfo() == Response.Status.CREATED) {
-
+                    response.readEntity(BoolMsg.class).getValue();
+                }
             }
         } catch (Exception e) { // Occurs only when server replies with valid status but invalid data
             throw new CommunicationException("Error accessing database: " + e.getMessage());
@@ -130,172 +136,35 @@ public class SimpleBulletinBoardClient implements BulletinBoardClient{
      * @return the list of Bulletin Board messages that are returned from a server
      */
     @Override
-    public List<BulletinBoardMessage> readMessages(MessageFilterList filterList) throws CommunicationException{
+    public List<BulletinBoardMessage> readMessages(MessageFilterList filterList) {
+
+        WebTarget webTarget;
+        Response response;
+        BulletinBoardMessageList messageList;
 
         // Replace null filter list with blank one.
         if (filterList == null){
-            filterList = MessageFilterList.getDefaultInstance();
+            filterList = MessageFilterList.newBuilder().build();
         }
 
-        String exceptionString = "";
-
         for (String db : meerkatDBs) {
 
             try {
+                webTarget = client.target(db).path(BULLETIN_BOARD_SERVER_PATH).path(READ_MESSAGES_PATH);
 
-                SingleServerReadMessagesWorker worker = new SingleServerReadMessagesWorker(db, filterList, 0);
+                response = webTarget.request(Constants.MEDIATYPE_PROTOBUF).post(Entity.entity(filterList, Constants.MEDIATYPE_PROTOBUF));
 
-                List<BulletinBoardMessage> result = worker.call();
+                messageList = response.readEntity(BulletinBoardMessageList.class);
 
-                return result;
+                if (messageList != null){
-
+                    return messageList.getMessageList();
-            } catch (Exception e) {
-                //TODO: log
-                exceptionString += e.getMessage() + "\n";
-            }
                 }
 
-        throw new CommunicationException("Could not find message in any DB. Errors follow:\n" + exceptionString);
+            } catch (Exception e) {}
 
         }
 
-    @Override
+        return null;
-    public MessageID postAsBatch(BulletinBoardMessage msg, int chunkSize) throws CommunicationException {
-
-        List<BatchChunk> chunkList = BulletinBoardUtils.breakToBatch(msg, chunkSize);
-
-        BeginBatchMessage beginBatchMessage = BulletinBoardUtils.generateBeginBatchMessage(msg);
-
-        boolean posted = false;
-
-        // Post message to all databases
-
-        for (String db : meerkatDBs) {
-
-            try {
-
-                int pos = 0;
-
-                SingleServerBeginBatchWorker beginBatchWorker = new SingleServerBeginBatchWorker(db, beginBatchMessage, 0);
-
-                Int64Value batchId = beginBatchWorker.call();
-
-                BatchMessage.Builder builder = BatchMessage.newBuilder().setBatchId(batchId.getValue());
-
-                for (BatchChunk batchChunk : chunkList) {
-
-                    SingleServerPostBatchWorker postBatchWorker =
-                            new SingleServerPostBatchWorker(
-                                    db,
-                                    builder.setData(batchChunk).setSerialNum(pos).build(),
-                                    0);
-
-                    postBatchWorker.call();
-
-                    pos++;
-
-                }
-
-                CloseBatchMessage closeBatchMessage = BulletinBoardUtils.generateCloseBatchMessage(batchId, chunkList.size(), msg);
-
-                SingleServerCloseBatchWorker closeBatchWorker = new SingleServerCloseBatchWorker(db, closeBatchMessage, 0);
-
-                closeBatchWorker.call();
-
-                posted = true;
-
-            } catch(Exception ignored) {}
-
-        }
-
-        if (!posted){
-            throw new CommunicationException("Could not post to any server");
-        }
-
-        digest.reset();
-        digest.update(msg);
-        return digest.digestAsMessageID();
-
-    }
-
-    @Override
-    public BulletinBoardMessage readMessage(MessageID msgID) throws CommunicationException {
-
-        MessageFilterList filterList = MessageFilterList.newBuilder()
-                .addFilter(MessageFilter.newBuilder()
-                        .setType(FilterType.MSG_ID)
-                        .setId(msgID.getID())
-                        .build())
-                .build();
-
-        BatchQuery batchQuery = BatchQuery.newBuilder()
-                .setMsgID(msgID)
-                .setStartPosition(0)
-                .build();
-
-        String exceptionString = "";
-
-        for (String db : meerkatDBs) {
-
-            try {
-                SingleServerReadMessagesWorker messagesWorker = new SingleServerReadMessagesWorker(db, filterList, 0);
-
-                List<BulletinBoardMessage> messages = messagesWorker.call();
-
-                if (messages == null || messages.size() < 1)
-                    continue;
-
-                BulletinBoardMessage stub = messages.get(0);
-
-                SingleServerReadBatchWorker batchWorker = new SingleServerReadBatchWorker(db, batchQuery, 0);
-
-                List<BatchChunk> batchChunkList = batchWorker.call();
-
-                return BulletinBoardUtils.gatherBatch(stub, batchChunkList);
-
-            } catch (Exception e) {
-                //TODO: log
-                exceptionString += e.getMessage() + "\n";
-            }
-        }
-
-        throw new CommunicationException("Could not find message in any DB. Errors follow:\n" + exceptionString);
-
-    }
-
-    @Override
-    public BulletinBoardMessage readBatchData(BulletinBoardMessage stub) throws CommunicationException, IllegalArgumentException {
-
-        if (stub.getMsg().getDataTypeCase() != UnsignedBulletinBoardMessage.DataTypeCase.MSGID){
-            throw new IllegalArgumentException("Message is not a stub and does not contain the required message ID");
-        }
-
-        BatchQuery batchQuery = BatchQuery.newBuilder()
-                .setMsgID(MessageID.newBuilder()
-                        .setID(stub.getMsg().getMsgId())
-                        .build())
-                .setStartPosition(0)
-                .build();
-
-        String exceptionString = "";
-
-        for (String db : meerkatDBs) {
-
-            try {
-
-                SingleServerReadBatchWorker batchWorker = new SingleServerReadBatchWorker(db, batchQuery, 0);
-
-                List<BatchChunk> batchChunkList = batchWorker.call();
-
-                return BulletinBoardUtils.gatherBatch(stub, batchChunkList);
-
-            } catch (Exception e) {
-                //TODO: log
-                exceptionString += e.getMessage() + "\n";
-            }
-        }
-
-        throw new CommunicationException("Could not find message in any DB. Errors follow:\n" + exceptionString);
 
     }
 

bulletin-board-client/src/main/java/meerkat/bulletinboard/SimpleBulletinBoardSynchronizer.java

@@ -1,241 +0,0 @@
-package meerkat.bulletinboard;
-
-import com.google.common.util.concurrent.FutureCallback;
-import com.google.protobuf.ByteString;
-import meerkat.comm.CommunicationException;
-import meerkat.protobuf.BulletinBoardApi.*;
-import meerkat.util.BulletinBoardUtils;
-
-import java.util.LinkedList;
-import java.util.List;
-import java.util.concurrent.Semaphore;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicBoolean;
-
-/**
- * Created by Arbel on 13/04/2016.
- * Simple, straightforward implementation of the {@link BulletinBoardSynchronizer} interface
- */
-public class SimpleBulletinBoardSynchronizer implements BulletinBoardSynchronizer {
-
-    private DeletableSubscriptionBulletinBoardClient localClient;
-    private AsyncBulletinBoardClient remoteClient;
-
-    private AtomicBoolean running;
-    private volatile SyncStatus syncStatus;
-
-    private List<FutureCallback<Integer>> messageCountCallbacks;
-    private List<FutureCallback<SyncStatus>> syncStatusCallbacks;
-
-    private static final MessageFilterList EMPTY_FILTER = MessageFilterList.getDefaultInstance();
-    private static final int DEFAULT_SLEEP_INTERVAL = 10000; // 10 Seconds
-    private static final int DEFAULT_WAIT_CAP = 300000; // 5 minutes wait before deciding that the sync has failed fatally
-
-    private final int SLEEP_INTERVAL;
-    private final int WAIT_CAP;
-
-    private Semaphore semaphore;
-
-    private class SyncCallback implements FutureCallback<List<BulletinBoardMessage>> {
-
-        @Override
-        public void onSuccess(List<BulletinBoardMessage> result) {
-
-            // Notify Message Count callbacks if needed
-
-            if (syncStatus != SyncStatus.SYNCHRONIZED || result.size() > 0) {
-
-                for (FutureCallback<Integer> callback : messageCountCallbacks){
-                    callback.onSuccess(result.size());
-                }
-
-            }
-
-            // Handle upload and status change
-
-            SyncStatus newStatus = SyncStatus.PENDING;
-
-            if (result.size() == 0) {
-                newStatus = SyncStatus.SYNCHRONIZED;
-                semaphore.release();
-            }
-
-            else{   // Upload messages
-
-                for (BulletinBoardMessage message : result){
-
-                    try {
-
-                        if (message.getMsg().getDataTypeCase() == UnsignedBulletinBoardMessage.DataTypeCase.MSGID) {
-
-                            // This is a batch message: need to upload batch data as well as the message itself
-
-                            BulletinBoardMessage completeMsg = localClient.readBatchData(message);
-
-                            remoteClient.postMessage(completeMsg);
-
-                            localClient.deleteMessage(completeMsg.getEntryNum());
-
-
-                        } else {
-
-                            // This is a regular message: post it
-                            remoteClient.postMessage(message);
-
-                            localClient.deleteMessage(message.getEntryNum());
-
-                        }
-
-                    } catch (CommunicationException e) {
-                        // This is an error with the local server
-                        // TODO: log
-                        updateSyncStatus(SyncStatus.SERVER_ERROR);
-                    }
-
-                }
-
-            }
-
-            updateSyncStatus(newStatus);
-
-        }
-
-        @Override
-        public void onFailure(Throwable t) {
-
-            updateSyncStatus(SyncStatus.SERVER_ERROR);
-
-        }
-
-    }
-
-    public SimpleBulletinBoardSynchronizer(int sleepInterval, int waitCap) {
-        this.syncStatus = SyncStatus.STOPPED;
-        this.SLEEP_INTERVAL = sleepInterval;
-        this.WAIT_CAP = waitCap;
-        this.running = new AtomicBoolean(false);
-    }
-
-    public SimpleBulletinBoardSynchronizer() {
-        this(DEFAULT_SLEEP_INTERVAL, DEFAULT_WAIT_CAP);
-    }
-
-    private synchronized void updateSyncStatus(SyncStatus newStatus) {
-
-        if (!running.get()) {
-
-            newStatus = SyncStatus.STOPPED;
-
-        }
-
-        if (newStatus != syncStatus){
-
-            syncStatus = newStatus;
-
-            for (FutureCallback<SyncStatus> callback : syncStatusCallbacks){
-                if (callback != null)
-                    callback.onSuccess(syncStatus);
-            }
-
-        }
-
-    }
-
-    @Override
-    public void init(DeletableSubscriptionBulletinBoardClient localClient, AsyncBulletinBoardClient remoteClient) {
-
-        updateSyncStatus(SyncStatus.STOPPED);
-
-        this.localClient = localClient;
-        this.remoteClient = remoteClient;
-
-        messageCountCallbacks = new LinkedList<>();
-        syncStatusCallbacks = new LinkedList<>();
-
-        semaphore = new Semaphore(0);
-
-    }
-
-    @Override
-    public SyncStatus getSyncStatus() {
-        return syncStatus;
-    }
-
-    @Override
-    public void subscribeToSyncStatus(FutureCallback<SyncStatus> callback) {
-        syncStatusCallbacks.add(callback);
-    }
-
-    @Override
-    public List<BulletinBoardMessage> getRemainingMessages()  throws CommunicationException{
-        return localClient.readMessages(EMPTY_FILTER);
-    }
-
-    @Override
-    public void getRemainingMessages(FutureCallback<List<BulletinBoardMessage>> callback) {
-        localClient.readMessages(EMPTY_FILTER, callback);
-    }
-
-    @Override
-    public long getRemainingMessagesCount() throws CommunicationException {
-        return localClient.readMessages(EMPTY_FILTER).size();
-    }
-
-    @Override
-    public void subscribeToRemainingMessagesCount(FutureCallback<Integer> callback) {
-        messageCountCallbacks.add(callback);
-    }
-
-    @Override
-    public void run() {
-
-        if (running.compareAndSet(false,true)){
-
-            updateSyncStatus(SyncStatus.PENDING);
-            SyncCallback callback = new SyncCallback();
-
-            while (syncStatus != SyncStatus.STOPPED) {
-
-                do {
-
-                    localClient.readMessages(EMPTY_FILTER, callback);
-
-                    try {
-
-                        semaphore.tryAcquire(WAIT_CAP, TimeUnit.MILLISECONDS);
-                        //TODO: log hard error. Too much time trying to upload data.
-
-                    } catch (InterruptedException ignored) {
-                        // We expect an interruption when the upload will complete
-                    }
-
-                } while (syncStatus == SyncStatus.PENDING);
-
-                // Database is synced. Wait for new data.
-
-                try {
-                    semaphore.tryAcquire(SLEEP_INTERVAL, TimeUnit.MILLISECONDS);
-                } catch (InterruptedException e) {
-                    //TODO: log (probably nudged)
-                }
-
-            }
-
-        }
-
-    }
-
-    @Override
-    public void nudge() {
-        semaphore.release();
-    }
-
-    @Override
-    public void stop() {
-
-        running.set(false);
-        updateSyncStatus(SyncStatus.STOPPED);
-
-    }
-
-}

bulletin-board-client/src/main/java/meerkat/bulletinboard/SingleServerBatchIdentifier.java

@@ -1,42 +0,0 @@
-package meerkat.bulletinboard;
-
-import com.google.protobuf.Int64Value;
-
-/**
- * Created by Arbel Deutsch Peled on 16-Jun-16.
- * Single-server implementation of the BatchIdentifier interface
- */
-final class SingleServerBatchIdentifier implements AsyncBulletinBoardClient.BatchIdentifier {
-
-    private final Int64Value batchId;
-
-    private int length;
-
-    public SingleServerBatchIdentifier(Int64Value batchId) {
-        this.batchId = batchId;
-        length = 0;
-    }
-
-    public SingleServerBatchIdentifier(long batchId) {
-        this(Int64Value.newBuilder().setValue(batchId).build());
-    }
-
-    public Int64Value getBatchId() {
-        return batchId;
-    }
-
-    /**
-     * Overrides the existing length with the new one only if the new length is longer
-     * @param newLength
-     */
-    public void setLength(int newLength) {
-        if (newLength > length) {
-            length = newLength;
-        }
-    }
-
-    public int getLength() {
-        return length;
-    }
-
-}

bulletin-board-client/src/main/java/meerkat/bulletinboard/SingleServerBulletinBoardClient.java

@@ -4,19 +4,18 @@ import com.google.common.util.concurrent.FutureCallback;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListeningScheduledExecutorService;
 import com.google.common.util.concurrent.MoreExecutors;
-import com.google.protobuf.Int64Value;
+import com.google.protobuf.ByteString;
-import com.google.protobuf.Timestamp;
 import meerkat.bulletinboard.workers.singleserver.*;
 import meerkat.comm.CommunicationException;
-import meerkat.crypto.concrete.SHA256Digest;
+import meerkat.protobuf.BulletinBoardAPI;
-import meerkat.protobuf.BulletinBoardApi.*;
+import meerkat.protobuf.BulletinBoardAPI.*;
-import meerkat.protobuf.Crypto;
 import meerkat.protobuf.Voting.BulletinBoardClientParams;
 import meerkat.util.BulletinBoardUtils;
 
-import javax.ws.rs.client.Client;
+import javax.ws.rs.NotFoundException;
-import java.lang.Iterable;
+import java.util.Arrays;
 import java.util.Iterator;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
@@ -31,23 +30,19 @@ import java.util.concurrent.atomic.AtomicInteger;
  * If the list of servers contains more than one server: the server actually used is the first one
  * The class further implements a delayed access to the server after a communication error occurs
  */
-public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoardClient {
+public class SingleServerBulletinBoardClient extends SimpleBulletinBoardClient implements SubscriptionAsyncBulletinBoardClient {
-
-    protected Client client;
-
-    protected BulletinBoardDigest digest;
-
-    private String dbAddress;
 
     private final int MAX_RETRIES = 11;
 
-    private final ListeningScheduledExecutorService executorService;
+    private ListeningScheduledExecutorService executorService;
+
+    protected BatchDigest batchDigest;
 
     private long lastServerErrorTime;
 
-    private final long FAIL_DELAY_IN_MILLISECONDS;
+    private final long failDelayInMilliseconds;
 
-    private final long SUBSCRIPTION_INTERVAL_IN_MILLISECONDS;
+    private final long subscriptionIntervalInMilliseconds;
 
     /**
      * Notify the client that a job has failed
@@ -60,43 +55,6 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
 
     }
 
-    private class SynchronousRetry<OUT> {
-
-        private final SingleServerWorker<?,OUT> worker;
-
-        private String thrown;
-
-        public SynchronousRetry(SingleServerWorker<?,OUT> worker) {
-            this.worker = worker;
-            this.thrown = "Could not contact server. Errors follow:\n";
-        }
-
-        OUT run() throws CommunicationException {
-
-            do {
-
-                try {
-                    return worker.call();
-                } catch (Exception e) {
-                    thrown += e.getCause() + " " + e.getMessage() + "\n";
-                }
-
-                try {
-                    Thread.sleep(FAIL_DELAY_IN_MILLISECONDS);
-                } catch (InterruptedException e) {
-                    //TODO: log
-                }
-
-                worker.decMaxRetry();
-
-            } while (worker.isRetry());
-
-            throw new CommunicationException(thrown);
-
-        }
-
-    }
-
     /**
      * This method adds a worker to the scheduled queue of the threadpool
      * If the server is in an accessible state: the job is submitted for immediate handling
@@ -108,7 +66,7 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
 
         long timeSinceLastServerError = System.currentTimeMillis() - lastServerErrorTime;
 
-        if (timeSinceLastServerError >= FAIL_DELAY_IN_MILLISECONDS) {
+        if (timeSinceLastServerError >= failDelayInMilliseconds) {
 
             // Schedule for immediate processing
             Futures.addCallback(executorService.submit(worker), callback);
@@ -118,7 +76,7 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
             // Schedule for processing immediately following delay expiry
             Futures.addCallback(executorService.schedule(
                     worker,
-                    FAIL_DELAY_IN_MILLISECONDS - timeSinceLastServerError,
+                    failDelayInMilliseconds - timeSinceLastServerError,
                     TimeUnit.MILLISECONDS),
                     callback);
 
@@ -141,7 +99,6 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
 
         @Override
         public void onSuccess(T result) {
-            if (futureCallback != null)
             futureCallback.onSuccess(result);
         }
 
@@ -160,7 +117,6 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
                 scheduleWorker(worker, this);
             } else {
                 // No more retries: notify caller about failure
-                if (futureCallback != null)
                 futureCallback.onFailure(t);
             }
 
@@ -173,14 +129,14 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
      * It reports success back to the user only if all of the batch-data were successfully posted
      * If any batch-data fails to post: this callback reports failure
      */
-    class PostBatchChunkListCallback implements FutureCallback<Boolean> {
+    class PostBatchDataListCallback implements FutureCallback<Boolean> {
 
         private final FutureCallback<Boolean> callback;
 
         private AtomicInteger batchDataRemaining;
         private AtomicBoolean aggregatedResult;
 
-        public PostBatchChunkListCallback(int batchDataLength, FutureCallback<Boolean> callback) {
+        public PostBatchDataListCallback(int batchDataLength, FutureCallback<Boolean> callback) {
 
             this.callback = callback;
             this.batchDataRemaining = new AtomicInteger(batchDataLength);
@@ -196,7 +152,6 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
             }
 
             if (batchDataRemaining.decrementAndGet() == 0){
-                if (callback != null)
                 callback.onSuccess(this.aggregatedResult.get());
             }
         }
@@ -205,80 +160,110 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
         public void onFailure(Throwable t) {
 
             // Notify caller about failure
-            if (callback != null)
             callback.onFailure(t);
 
         }
     }
 
-    private class ReadBatchCallback implements FutureCallback<List<BatchChunk>> {
-
-        private final BulletinBoardMessage stub;
-        private final FutureCallback<BulletinBoardMessage> callback;
-
-        public ReadBatchCallback(BulletinBoardMessage stub, FutureCallback<BulletinBoardMessage> callback) {
-            this.stub = stub;
-            this.callback = callback;
-        }
-
-        @Override
-        public void onSuccess(List<BatchChunk> result) {
-            callback.onSuccess(BulletinBoardUtils.gatherBatch(stub, result));
-        }
-
-        @Override
-        public void onFailure(Throwable t) {
-            callback.onFailure(t);
-        }
-
-    }
-
     /**
-     * This callback receives a message which may be a stub
+     * This callback ties together the different parts of a CompleteBatch as they arrive from the server
-     * If the message is not a stub: it returns it as is to a callback function
+     * It assembles a CompleteBatch from the parts and sends it to the user if all parts arrived
-     * If it is a stub: it schedules a read of the batch data which will return a complete message to the callback function
+     * If any part fails to arrive: it invokes the onFailure method
      */
-    class CompleteMessageReadCallback implements FutureCallback<List<BulletinBoardMessage>>{
+    class CompleteBatchReadCallback {
 
-        private final FutureCallback<BulletinBoardMessage> callback;
+        private final FutureCallback<CompleteBatch> callback;
 
-        public CompleteMessageReadCallback(FutureCallback<BulletinBoardMessage> callback) {
+        private List<BatchData> batchDataList;
+        private BulletinBoardMessage batchMessage;
+
+        private AtomicInteger remainingQueries;
+        private AtomicBoolean failed;
+
+        public CompleteBatchReadCallback(FutureCallback<CompleteBatch> callback) {
 
             this.callback = callback;
 
+            remainingQueries = new AtomicInteger(2);
+            failed = new AtomicBoolean(false);
+
         }
 
+        protected void combineAndReturn() {
+
+            final String[] prefixes = {
+                    BulletinBoardConstants.BATCH_ID_TAG_PREFIX,
+                    BulletinBoardConstants.BATCH_TAG};
+
+            if (remainingQueries.decrementAndGet() == 0){
+
+                String batchIdStr = BulletinBoardUtils.findTagWithPrefix(batchMessage, BulletinBoardConstants.BATCH_ID_TAG_PREFIX);
+
+                if (batchIdStr == null){
+                    callback.onFailure(new CommunicationException("Server returned invalid message with no Batch ID tag"));
+                }
+
+                BeginBatchMessage beginBatchMessage =
+                        BeginBatchMessage.newBuilder()
+                                .setSignerId(batchMessage.getSig(0).getSignerId())
+                                .setBatchId(Integer.parseInt(batchIdStr))
+                                .addAllTag(BulletinBoardUtils.removePrefixTags(batchMessage, Arrays.asList(prefixes)))
+                                .build();
+                callback.onSuccess(new CompleteBatch(beginBatchMessage, batchDataList, batchMessage.getSig(0)));
+            }
+
+        }
+
+        protected void fail(Throwable t) {
+            if (failed.compareAndSet(false, true)) {
+                callback.onFailure(t);
+            }
+        }
+
+        /**
+         * @return a FutureCallback for the Batch Data List that ties to this object
+         */
+        public FutureCallback<List<BatchData>> asBatchDataListFutureCallback() {
+            return new FutureCallback<List<BatchData>>() {
+
                 @Override
-        public void onSuccess(List<BulletinBoardMessage> result) {
+                public void onSuccess(List<BatchData> result) {
-            if (result.size() <= 0) {
+                    batchDataList = result;
-                onFailure(new CommunicationException("Could not find required message on the server."));
-            } else {
 
-                BulletinBoardMessage msg = result.get(0);
+                    combineAndReturn();
-
-                if (msg.getMsg().getDataTypeCase() != UnsignedBulletinBoardMessage.DataTypeCase.MSGID) {
-                    callback.onSuccess(msg);
-                } else {
-
-                    // Create job with MAX retries for retrieval of the Batch Data List
-
-                    BatchQuery batchQuery = BatchQuery.newBuilder()
-                            .setMsgID(MessageID.newBuilder()
-                                    .setID(msg.getMsg().getMsgId())
-                                    .build())
-                            .build();
-
-                    SingleServerReadBatchWorker batchWorker = new SingleServerReadBatchWorker(dbAddress, batchQuery, MAX_RETRIES);
-
-                    scheduleWorker(batchWorker, new ReadBatchCallback(msg, callback));
-
-                }
-            }
                 }
 
                 @Override
                 public void onFailure(Throwable t) {
-            callback.onFailure(t);
+                    fail(t);
+                }
+
+            };
+        }
+
+        /**
+         * @return a FutureCallback for the Bulletin Board Message that ties to this object
+         */
+        public FutureCallback<List<BulletinBoardMessage>> asBulletinBoardMessageListFutureCallback() {
+            return new FutureCallback<List<BulletinBoardMessage>>() {
+
+                @Override
+                public void onSuccess(List<BulletinBoardMessage> result) {
+                    if (result.size() < 1){
+                        onFailure(new IllegalArgumentException("Server returned empty message list"));
+                        return;
+                    }
+
+                    batchMessage = result.get(0);
+
+                    combineAndReturn();
+                }
+
+                @Override
+                public void onFailure(Throwable t) {
+                    fail(t);
+                }
+            };
         }
 
     }
@@ -306,13 +291,8 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
         public void onSuccess(List<BulletinBoardMessage> result) {
 
             // Report new messages to user
-            if (callback != null)
             callback.onSuccess(result);
 
-            // Update filter if needed
-
-            if (result.size() > 0) {
-
             // Remove last filter from list (MIN_ENTRY one)
             filterBuilder.removeFilter(filterBuilder.getFilterCount() - 1);
 
@@ -322,15 +302,11 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
                     .setEntry(result.get(result.size() - 1).getEntryNum() + 1)
                     .build());
 
-            }
-
             // Create new worker with updated task
-            worker = new SingleServerReadMessagesWorker(worker.serverAddress, filterBuilder.build(), MAX_RETRIES);
+            worker = new SingleServerReadMessagesWorker(worker.serverAddress, filterBuilder.build(), 1);
 
-            RetryCallback<List<BulletinBoardMessage>> retryCallback = new RetryCallback<>(worker, this);
+            // Schedule the worker
-
+            scheduleWorker(worker, this);
-            // Schedule the worker to run after the given interval has elapsed
-            Futures.addCallback(executorService.schedule(worker, SUBSCRIPTION_INTERVAL_IN_MILLISECONDS, TimeUnit.MILLISECONDS), retryCallback);
 
         }
 
@@ -341,7 +317,6 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
             fail();
 
             // Notify caller about failure and terminate subscription
-            if (callback != null)
             callback.onFailure(t);
         }
     }
@@ -352,8 +327,8 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
 
         this.executorService = executorService;
 
-        this.FAIL_DELAY_IN_MILLISECONDS = failDelayInMilliseconds;
+        this.failDelayInMilliseconds = failDelayInMilliseconds;
-        this.SUBSCRIPTION_INTERVAL_IN_MILLISECONDS = subscriptionIntervalInMilliseconds;
+        this.subscriptionIntervalInMilliseconds = subscriptionIntervalInMilliseconds;
 
         // Set server error time to a time sufficiently in the past to make new jobs go through
         lastServerErrorTime = System.currentTimeMillis() - failDelayInMilliseconds;
@@ -375,345 +350,133 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
     @Override
     public void init(BulletinBoardClientParams clientParams) {
 
-        this.digest = new GenericBulletinBoardDigest(new SHA256Digest());
+        // Perform usual setup
+        super.init(clientParams);
+
+        // Wrap the Digest into a BatchDigest
+        batchDigest = new GenericBatchDigest(digest);
 
         // Remove all but first DB address
-        this.dbAddress = clientParams.getBulletinBoardAddress(0);
+        String dbAddress = meerkatDBs.get(0);
+        meerkatDBs = new LinkedList<>();
+        meerkatDBs.add(dbAddress);
 
     }
 
-    // Synchronous methods
-
-    @Override
-    public MessageID postMessage(BulletinBoardMessage msg) throws CommunicationException {
-
-        SingleServerPostMessageWorker worker = new SingleServerPostMessageWorker(dbAddress, msg, MAX_RETRIES);
-
-        SynchronousRetry<Boolean> retry = new SynchronousRetry<>(worker);
-
-        retry.run();
-
-        digest.reset();
-        digest.update(msg);
-
-        return digest.digestAsMessageID();
-
-    }
-
-    @Override
-    public float getRedundancy(MessageID id) throws CommunicationException {
-
-        SingleServerGetRedundancyWorker worker = new SingleServerGetRedundancyWorker(dbAddress, id, MAX_RETRIES);
-
-        SynchronousRetry<Float> retry = new SynchronousRetry<>(worker);
-
-        return retry.run();
-
-    }
-
-    @Override
-    public List<BulletinBoardMessage> readMessages(MessageFilterList filterList) throws CommunicationException {
-
-        SingleServerReadMessagesWorker worker = new SingleServerReadMessagesWorker(dbAddress, filterList, MAX_RETRIES);
-
-        SynchronousRetry<List<BulletinBoardMessage>> retry = new SynchronousRetry<>(worker);
-
-        return retry.run();
-
-    }
-
-    @Override
-    public MessageID postAsBatch(BulletinBoardMessage msg, int chunkSize) throws CommunicationException {
-
-        // Begin the batch and obtain identifier
-
-        BeginBatchMessage beginBatchMessage = BeginBatchMessage.newBuilder()
-                .addAllTag(msg.getMsg().getTagList())
-                .build();
-
-        SingleServerBeginBatchWorker beginBatchWorker = new SingleServerBeginBatchWorker(dbAddress, beginBatchMessage, MAX_RETRIES);
-
-        SynchronousRetry<Int64Value> beginRetry = new SynchronousRetry<>(beginBatchWorker);
-
-        Int64Value identifier = beginRetry.run();
-
-        // Post data chunks
-
-        List<BatchChunk> batchChunkList = BulletinBoardUtils.breakToBatch(msg, chunkSize);
-
-        BatchMessage.Builder builder = BatchMessage.newBuilder().setBatchId(identifier.getValue());
-
-        int position = 0;
-
-        for (BatchChunk data : batchChunkList) {
-
-            builder.setSerialNum(position).setData(data);
-
-            SingleServerPostBatchWorker dataWorker = new SingleServerPostBatchWorker(dbAddress, builder.build(), MAX_RETRIES);
-
-            SynchronousRetry<Boolean> dataRetry = new SynchronousRetry<>(dataWorker);
-
-            dataRetry.run();
-
-            // Increment position in batch
-            position++;
-
-        }
-
-        // Close batch
-
-        CloseBatchMessage closeBatchMessage = CloseBatchMessage.newBuilder()
-                .setBatchId(identifier.getValue())
-                .addAllSig(msg.getSigList())
-                .setTimestamp(msg.getMsg().getTimestamp())
-                .setBatchLength(position)
-                .build();
-
-        SingleServerCloseBatchWorker closeBatchWorker = new SingleServerCloseBatchWorker(dbAddress, closeBatchMessage, MAX_RETRIES);
-
-        SynchronousRetry<Boolean> retry = new SynchronousRetry<>(closeBatchWorker);
-
-        retry.run();
-
-        // Calculate ID and return
-
-        digest.reset();
-        digest.update(msg);
-
-        return digest.digestAsMessageID();
-
-    }
-
-    @Override
-    public BulletinBoardMessage readMessage(MessageID msgID) throws CommunicationException {
-
-        // Retrieve message (which may be a stub)
-
-        MessageFilterList filterList = MessageFilterList.newBuilder()
-                .addFilter(MessageFilter.newBuilder()
-                        .setType(FilterType.MSG_ID)
-                        .setId(msgID.getID())
-                        .build())
-                .build();
-
-        SingleServerReadMessagesWorker stubWorker = new SingleServerReadMessagesWorker(dbAddress, filterList, MAX_RETRIES);
-
-        SynchronousRetry<List<BulletinBoardMessage>> retry = new SynchronousRetry<>(stubWorker);
-
-        List<BulletinBoardMessage> messages = retry.run();
-
-        if (messages.size() <= 0) {
-            throw new CommunicationException("Could not find message in database.");
-        }
-
-        BulletinBoardMessage msg = messages.get(0);
-
-        if (msg.getMsg().getDataTypeCase() != UnsignedBulletinBoardMessage.DataTypeCase.MSGID) {
-
-            // We retrieved a complete message. Return it.
-            return msg;
-
-        } else {
-
-            // We retrieved a stub. Retrieve data.
-            return readBatchData(msg);
-
-        }
-
-    }
-
-    @Override
-    public BulletinBoardMessage readBatchData(BulletinBoardMessage stub) throws CommunicationException, IllegalArgumentException {
-
-        BatchQuery batchQuery = BatchQuery.newBuilder()
-                .setMsgID(MessageID.newBuilder()
-                        .setID(stub.getMsg().getMsgId())
-                        .build())
-                .setStartPosition(0)
-                .build();
-
-        SingleServerReadBatchWorker readBatchWorker = new SingleServerReadBatchWorker(dbAddress, batchQuery, MAX_RETRIES);
-
-        SynchronousRetry<List<BatchChunk>> batchRetry = new SynchronousRetry<>(readBatchWorker);
-
-        List<BatchChunk> batchChunkList = batchRetry.run();
-
-        return BulletinBoardUtils.gatherBatch(stub, batchChunkList);
-
-    }
-
-    @Override
-    public SyncQuery generateSyncQuery(GenerateSyncQueryParams generateSyncQueryParams) throws CommunicationException {
-
-        SingleServerGenerateSyncQueryWorker worker =
-                new SingleServerGenerateSyncQueryWorker(dbAddress, generateSyncQueryParams, MAX_RETRIES);
-
-        SynchronousRetry<SyncQuery> retry = new SynchronousRetry<>(worker);
-
-        return retry.run();
-
-    }
-
-    // Asynchronous methods
-
     @Override
     public MessageID postMessage(BulletinBoardMessage msg, FutureCallback<Boolean> callback) {
 
         // Create worker with redundancy 1 and MAX_RETRIES retries
-        SingleServerPostMessageWorker worker = new SingleServerPostMessageWorker(dbAddress, msg, MAX_RETRIES);
+        SingleServerPostMessageWorker worker = new SingleServerPostMessageWorker(meerkatDBs.get(0), msg, MAX_RETRIES);
 
         // Submit worker and create callback
         scheduleWorker(worker, new RetryCallback<>(worker, callback));
 
         // Calculate the correct message ID and return it
-        digest.reset();
+        batchDigest.reset();
-        digest.update(msg.getMsg());
+        batchDigest.update(msg.getMsg());
-        return digest.digestAsMessageID();
+        return batchDigest.digestAsMessageID();
 
     }
 
     private class PostBatchDataCallback implements FutureCallback<Boolean> {
 
-        private final BulletinBoardMessage msg;
+        private final CompleteBatch completeBatch;
-        private final BatchIdentifier identifier;
         private final FutureCallback<Boolean> callback;
 
-        public PostBatchDataCallback(BulletinBoardMessage msg, BatchIdentifier identifier, FutureCallback<Boolean> callback) {
+        public PostBatchDataCallback(CompleteBatch completeBatch, FutureCallback<Boolean> callback) {
-            this.msg = msg;
+            this.completeBatch = completeBatch;
-            this.identifier = identifier;
             this.callback = callback;
         }
 
         @Override
-        public void onSuccess(Boolean result) {
+        public void onSuccess(Boolean msg) {
             closeBatch(
-                    identifier,
+                    completeBatch.getCloseBatchMessage(),
-                    msg.getMsg().getTimestamp(),
-                    msg.getSigList(),
                     callback
             );
         }
 
         @Override
         public void onFailure(Throwable t) {
-            if (callback != null)
             callback.onFailure(t);
         }
 
     }
 
-    private class ContinueBatchCallback implements FutureCallback<BatchIdentifier> {
+    private class BeginBatchCallback implements FutureCallback<Boolean> {
 
-        private final BulletinBoardMessage msg;
+        private final CompleteBatch completeBatch;
-        private final int chunkSize;
         private final FutureCallback<Boolean> callback;
 
-        public ContinueBatchCallback(BulletinBoardMessage msg, int chunkSize, FutureCallback<Boolean> callback) {
+        public BeginBatchCallback(CompleteBatch completeBatch, FutureCallback<Boolean> callback) {
-            this.msg = msg;
+            this.completeBatch = completeBatch;
-            this.chunkSize = chunkSize;
             this.callback = callback;
         }
 
         @Override
-        public void onSuccess(BatchIdentifier identifier) {
+        public void onSuccess(Boolean msg) {
-
-            List<BatchChunk> batchChunkList = BulletinBoardUtils.breakToBatch(msg, chunkSize);
 
             postBatchData(
-                    identifier,
+                    completeBatch.getBeginBatchMessage().getSignerId(),
-                    batchChunkList,
+                    completeBatch.getBeginBatchMessage().getBatchId(),
+                    completeBatch.getBatchDataList(),
                     0,
-                    new PostBatchDataCallback(msg, identifier, callback));
+                    new PostBatchDataCallback(completeBatch,callback));
         }
 
         @Override
         public void onFailure(Throwable t) {
-            if (callback != null)
             callback.onFailure(t);
         }
     }
 
     @Override
-    public MessageID postAsBatch(BulletinBoardMessage msg, int chunkSize, FutureCallback<Boolean> callback) {
+    public MessageID postBatch(CompleteBatch completeBatch, FutureCallback<Boolean> callback) {
 
         beginBatch(
-                msg.getMsg().getTagList(),
+                completeBatch.getBeginBatchMessage(),
-                new ContinueBatchCallback(msg, chunkSize, callback)
+                new BeginBatchCallback(completeBatch, callback)
         );
 
-        digest.update(msg);
+        batchDigest.update(completeBatch);
 
-        return digest.digestAsMessageID();
+        return batchDigest.digestAsMessageID();
 
     }
 
-    private class BeginBatchCallback implements FutureCallback<Int64Value> {
-
-        private final FutureCallback<BatchIdentifier> callback;
-
-        public BeginBatchCallback(FutureCallback<BatchIdentifier> callback) {
-            this.callback = callback;
-        }
-
     @Override
-        public void onSuccess(Int64Value result) {
+    public void beginBatch(BeginBatchMessage beginBatchMessage, FutureCallback<Boolean> callback) {
-            callback.onSuccess(new SingleServerBatchIdentifier(result));
-        }
-
-        @Override
-        public void onFailure(Throwable t) {
-            callback.onFailure(t);
-        }
-    }
-
-    @Override
-    public void beginBatch(Iterable<String> tags, FutureCallback<BatchIdentifier> callback) {
-
-        BeginBatchMessage beginBatchMessage = BeginBatchMessage.newBuilder()
-                .addAllTag(tags)
-                .build();
 
         // Create worker with redundancy 1 and MAX_RETRIES retries
         SingleServerBeginBatchWorker worker =
-                new SingleServerBeginBatchWorker(dbAddress, beginBatchMessage, MAX_RETRIES);
+                new SingleServerBeginBatchWorker(meerkatDBs.get(0), beginBatchMessage, MAX_RETRIES);
 
         // Submit worker and create callback
-        scheduleWorker(worker, new RetryCallback<>(worker, new BeginBatchCallback(callback)));
+        scheduleWorker(worker, new RetryCallback<>(worker, callback));
 
     }
 
-
     @Override
-    public void postBatchData(BatchIdentifier batchIdentifier, List<BatchChunk> batchChunkList,
+    public void postBatchData(ByteString signerId, int batchId, List<BatchData> batchDataList,
-                          int startPosition, FutureCallback<Boolean> callback) throws IllegalArgumentException{
+                          int startPosition, FutureCallback<Boolean> callback) {
 
-        // Cast identifier to usable form
+        BatchMessage.Builder builder = BatchMessage.newBuilder()
-
+                .setSignerId(signerId)
-        if (!(batchIdentifier instanceof SingleServerBatchIdentifier)){
+                .setBatchId(batchId);
-            throw new IllegalArgumentException("Error: batch identifier supplied was not created by this class.");
-        }
-
-        SingleServerBatchIdentifier identifier = (SingleServerBatchIdentifier) batchIdentifier;
-
-        // Update batch size
-
-        identifier.setLength(startPosition + batchChunkList.size());
 
         // Create a unified callback to aggregate successful posts
 
-        PostBatchChunkListCallback listCallback = new PostBatchChunkListCallback(batchChunkList.size(), callback);
+        PostBatchDataListCallback listCallback = new PostBatchDataListCallback(batchDataList.size(), callback);
 
         // Iterate through data list
 
-        BatchMessage.Builder builder = BatchMessage.newBuilder()
+        for (BatchData data : batchDataList) {
-                .setBatchId(identifier.getBatchId().getValue());
-
-        for (BatchChunk data : batchChunkList) {
             builder.setSerialNum(startPosition).setData(data);
 
             // Create worker with redundancy 1 and MAX_RETRIES retries
             SingleServerPostBatchWorker worker =
-                    new SingleServerPostBatchWorker(dbAddress, builder.build(), MAX_RETRIES);
+                    new SingleServerPostBatchWorker(meerkatDBs.get(0), builder.build(), MAX_RETRIES);
 
             // Create worker with redundancy 1 and MAX_RETRIES retries
             scheduleWorker(worker, new RetryCallback<>(worker, listCallback));
@@ -725,33 +488,33 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
     }
 
     @Override
-    public void postBatchData(BatchIdentifier batchIdentifier, List<BatchChunk> batchChunkList, FutureCallback<Boolean> callback)
+    public void postBatchData(ByteString signerId, int batchId, List<BatchData> batchDataList, FutureCallback<Boolean> callback) {
-        throws IllegalArgumentException {
 
-        postBatchData(batchIdentifier, batchChunkList, 0, callback);
+        postBatchData(signerId, batchId, batchDataList, 0, callback);
 
     }
 
     @Override
-    public void closeBatch(BatchIdentifier batchIdentifier, Timestamp timestamp, Iterable<Crypto.Signature> signatures, FutureCallback<Boolean> callback)
+    public void postBatchData(byte[] signerId, int batchId, List<BatchData> batchDataList,
-            throws IllegalArgumentException {
+                              int startPosition, FutureCallback<Boolean> callback) {
+
+        postBatchData(ByteString.copyFrom(signerId), batchId, batchDataList, startPosition, callback);
 
-        if (!(batchIdentifier instanceof SingleServerBatchIdentifier)){
-            throw new IllegalArgumentException("Error: batch identifier supplied was not created by this class.");
     }
 
-        SingleServerBatchIdentifier identifier = (SingleServerBatchIdentifier) batchIdentifier;
+    @Override
+    public void postBatchData(byte[] signerId, int batchId, List<BatchData> batchDataList, FutureCallback<Boolean> callback) {
 
-        CloseBatchMessage closeBatchMessage = CloseBatchMessage.newBuilder()
+        postBatchData(signerId, batchId, batchDataList, 0, callback);
-                .setBatchId(identifier.getBatchId().getValue())
+
-                .setBatchLength(identifier.getLength())
+    }
-                .setTimestamp(timestamp)
+
-                .addAllSig(signatures)
+    @Override
-                .build();
+    public void closeBatch(CloseBatchMessage closeBatchMessage, FutureCallback<Boolean> callback) {
 
         // Create worker with redundancy 1 and MAX_RETRIES retries
         SingleServerCloseBatchWorker worker =
-                new SingleServerCloseBatchWorker(dbAddress, closeBatchMessage, MAX_RETRIES);
+                new SingleServerCloseBatchWorker(meerkatDBs.get(0), closeBatchMessage, MAX_RETRIES);
 
         // Submit worker and create callback
         scheduleWorker(worker, new RetryCallback<>(worker, callback));
@@ -762,7 +525,7 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
     public void getRedundancy(MessageID id, FutureCallback<Float> callback) {
 
         // Create worker with no retries
-        SingleServerGetRedundancyWorker worker = new SingleServerGetRedundancyWorker(dbAddress, id, 1);
+        SingleServerGetRedundancyWorker worker = new SingleServerGetRedundancyWorker(meerkatDBs.get(0), id, 1);
 
         // Submit job and create callback
         scheduleWorker(worker, new RetryCallback<>(worker, callback));
@@ -773,7 +536,7 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
     public void readMessages(MessageFilterList filterList, FutureCallback<List<BulletinBoardMessage>> callback) {
 
         // Create job with no retries
-        SingleServerReadMessagesWorker worker = new SingleServerReadMessagesWorker(dbAddress, filterList, 1);
+        SingleServerReadMessagesWorker worker = new SingleServerReadMessagesWorker(meerkatDBs.get(0), filterList, 1);
 
         // Submit job and create callback
         scheduleWorker(worker, new RetryCallback<>(worker, callback));
@@ -781,55 +544,43 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
     }
 
     @Override
-    public void readMessage(MessageID msgID, FutureCallback<BulletinBoardMessage> callback) {
+    public void readBatch(BatchSpecificationMessage batchSpecificationMessage, FutureCallback<CompleteBatch> callback) {
 
-        // Create job with MAX retries for retrieval of the Bulletin Board Message (which may be a stub)
+        // Create job with no retries for retrieval of the Bulletin Board Message that defines the batch
 
         MessageFilterList filterList = MessageFilterList.newBuilder()
                 .addFilter(MessageFilter.newBuilder()
-                        .setType(FilterType.MSG_ID)
+                        .setType(FilterType.TAG)
-                        .setId(msgID.getID())
+                        .setTag(BulletinBoardConstants.BATCH_TAG)
+                        .build())
+                .addFilter(MessageFilter.newBuilder()
+                        .setType(FilterType.TAG)
+                        .setTag(BulletinBoardConstants.BATCH_ID_TAG_PREFIX + batchSpecificationMessage.getBatchId())
+                        .build())
+                .addFilter(MessageFilter.newBuilder()
+                        .setType(FilterType.SIGNER_ID)
+                        .setId(batchSpecificationMessage.getSignerId())
                         .build())
                 .build();
 
-        BatchQuery batchQuery = BatchQuery.newBuilder()
+        SingleServerReadMessagesWorker messageWorker = new SingleServerReadMessagesWorker(meerkatDBs.get(0), filterList, 1);
-                .setMsgID(msgID)
-                .setStartPosition(0)
-                .build();
 
-        SingleServerReadMessagesWorker messageWorker = new SingleServerReadMessagesWorker(dbAddress, filterList, MAX_RETRIES);
+        // Create job with no retries for retrieval of the Batch Data List
+        SingleServerReadBatchWorker batchWorker = new SingleServerReadBatchWorker(meerkatDBs.get(0), batchSpecificationMessage, 1);
+
+        // Create callback that will combine the two worker products
+        CompleteBatchReadCallback completeBatchReadCallback = new CompleteBatchReadCallback(callback);
 
         // Submit jobs with wrapped callbacks
-        scheduleWorker(messageWorker, new RetryCallback<>(messageWorker, new CompleteMessageReadCallback(callback)));
+        scheduleWorker(messageWorker, new RetryCallback<>(messageWorker, completeBatchReadCallback.asBulletinBoardMessageListFutureCallback()));
-
+        scheduleWorker(batchWorker, new RetryCallback<>(batchWorker, completeBatchReadCallback.asBatchDataListFutureCallback()));
-    }
-
-    @Override
-    public void readBatchData(BulletinBoardMessage stub, FutureCallback<BulletinBoardMessage> callback) throws IllegalArgumentException{
-
-        if (stub.getMsg().getDataTypeCase() != UnsignedBulletinBoardMessage.DataTypeCase.MSGID) {
-            throw new IllegalArgumentException("Message is not a stub and does not contain the required message ID");
-        }
-
-        // Create job with MAX retries for retrieval of the Batch Data List
-
-        BatchQuery batchQuery = BatchQuery.newBuilder()
-                .setMsgID(MessageID.newBuilder()
-                        .setID(stub.getMsg().getMsgId())
-                        .build())
-                .setStartPosition(0)
-                .build();
-
-        SingleServerReadBatchWorker batchWorker = new SingleServerReadBatchWorker(dbAddress, batchQuery, MAX_RETRIES);
-
-        scheduleWorker(batchWorker, new RetryCallback<>(batchWorker, new ReadBatchCallback(stub, callback)));
 
     }
 
     @Override
     public void querySync(SyncQuery syncQuery, FutureCallback<SyncQueryResponse> callback) {
 
-        SingleServerQuerySyncWorker worker = new SingleServerQuerySyncWorker(dbAddress, syncQuery, MAX_RETRIES);
+        SingleServerQuerySyncWorker worker = new SingleServerQuerySyncWorker(meerkatDBs.get(0), syncQuery, MAX_RETRIES);
 
         scheduleWorker(worker, new RetryCallback<>(worker, callback));
 
@@ -855,7 +606,7 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
                 .build());
 
         // Create job with no retries
-        SingleServerReadMessagesWorker worker = new SingleServerReadMessagesWorker(dbAddress, filterListBuilder.build(), MAX_RETRIES);
+        SingleServerReadMessagesWorker worker = new SingleServerReadMessagesWorker(meerkatDBs.get(0), filterListBuilder.build(), MAX_RETRIES);
 
         // Submit job and create callback that retries on failure and handles repeated subscription
         scheduleWorker(worker, new RetryCallback<>(worker, new SubscriptionCallback(worker, callback)));
@@ -869,6 +620,8 @@ public class SingleServerBulletinBoardClient implements SubscriptionBulletinBoar
     @Override
     public void close() {
 
+        super.close();
+
         executorService.shutdown();
 
     }

bulletin-board-client/src/main/java/meerkat/bulletinboard/ThreadedBulletinBoardClient.java

@@ -1,11 +1,12 @@
 package meerkat.bulletinboard;
 
 import com.google.common.util.concurrent.FutureCallback;
+import com.google.protobuf.ByteString;
 
-import com.google.protobuf.Timestamp;
 import meerkat.bulletinboard.workers.multiserver.*;
-import meerkat.protobuf.BulletinBoardApi.*;
+import meerkat.comm.CommunicationException;
-import meerkat.protobuf.Crypto.Signature;
+import meerkat.protobuf.BulletinBoardAPI;
+import meerkat.protobuf.BulletinBoardAPI.*;
 import meerkat.protobuf.Voting.*;
 
 import java.util.ArrayList;
@@ -30,33 +31,18 @@ public class ThreadedBulletinBoardClient extends SimpleBulletinBoardClient imple
     // Per-server clients
     private List<SingleServerBulletinBoardClient> clients;
 
-    private BulletinBoardDigest batchDigest;
+    private BatchDigest batchDigest;
 
     private final static int POST_MESSAGE_RETRY_NUM = 3;
     private final static int READ_MESSAGES_RETRY_NUM = 1;
     private final static int GET_REDUNDANCY_RETRY_NUM = 1;
 
-    private final int SERVER_THREADPOOL_SIZE;
+    private static final int SERVER_THREADPOOL_SIZE = 5;
-    private final long FAIL_DELAY;
+    private static final long FAIL_DELAY = 5000;
-    private final long SUBSCRIPTION_INTERVAL;
+    private static final long SUBSCRIPTION_INTERVAL = 10000;
-
-    private static final int DEFAULT_SERVER_THREADPOOL_SIZE = 5;
-    private static final long DEFAULT_FAIL_DELAY = 5000;
-    private static final long DEFAULT_SUBSCRIPTION_INTERVAL = 10000;
 
     private int minAbsoluteRedundancy;
 
-
-    public ThreadedBulletinBoardClient(int serverThreadpoolSize, long failDelay, long subscriptionInterval) {
-        SERVER_THREADPOOL_SIZE = serverThreadpoolSize;
-        FAIL_DELAY = failDelay;
-        SUBSCRIPTION_INTERVAL = subscriptionInterval;
-    }
-
-    public ThreadedBulletinBoardClient() {
-        this(DEFAULT_SERVER_THREADPOOL_SIZE, DEFAULT_FAIL_DELAY, DEFAULT_SUBSCRIPTION_INTERVAL);
-    }
-
     /**
      * Stores database locations and initializes the web Client
      * Stores the required minimum redundancy.
@@ -68,7 +54,7 @@ public class ThreadedBulletinBoardClient extends SimpleBulletinBoardClient imple
 
         super.init(clientParams);
 
-        batchDigest = new GenericBulletinBoardDigest(digest);
+        batchDigest = new GenericBatchDigest(digest);
 
         minAbsoluteRedundancy = (int) (clientParams.getMinRedundancy() * (float) clientParams.getBulletinBoardAddressCount());
 
@@ -114,28 +100,28 @@ public class ThreadedBulletinBoardClient extends SimpleBulletinBoardClient imple
     }
 
     @Override
-    public MessageID postAsBatch(BulletinBoardMessage msg, int chunkSize, FutureCallback<Boolean> callback) {
+    public MessageID postBatch(CompleteBatch completeBatch, FutureCallback<Boolean> callback) {
 
         // Create job
         MultiServerPostBatchWorker worker =
-                new MultiServerPostBatchWorker(clients, minAbsoluteRedundancy, msg, chunkSize, POST_MESSAGE_RETRY_NUM, callback);
+                new MultiServerPostBatchWorker(clients, minAbsoluteRedundancy, completeBatch, POST_MESSAGE_RETRY_NUM, callback);
 
         // Submit job
         executorService.submit(worker);
 
         // Calculate the correct message ID and return it
         batchDigest.reset();
-        batchDigest.update(msg);
+        batchDigest.update(completeBatch);
         return batchDigest.digestAsMessageID();
 
     }
 
     @Override
-    public void beginBatch(Iterable<String> tags, FutureCallback<BatchIdentifier> callback) {
+    public void beginBatch(BeginBatchMessage beginBatchMessage, FutureCallback<Boolean> callback) {
 
         // Create job
         MultiServerBeginBatchWorker worker =
-                new MultiServerBeginBatchWorker(clients, minAbsoluteRedundancy, tags, POST_MESSAGE_RETRY_NUM, callback);
+                new MultiServerBeginBatchWorker(clients, minAbsoluteRedundancy, beginBatchMessage, POST_MESSAGE_RETRY_NUM, callback);
 
         // Submit job
         executorService.submit(worker);
@@ -143,18 +129,10 @@ public class ThreadedBulletinBoardClient extends SimpleBulletinBoardClient imple
     }
 
     @Override
-    public void postBatchData(BatchIdentifier batchIdentifier, List<BatchChunk> batchChunkList,
+    public void postBatchData(byte[] signerId, int batchId, List<BatchData> batchDataList,
-                              int startPosition, FutureCallback<Boolean> callback) throws IllegalArgumentException {
+                              int startPosition, FutureCallback<Boolean> callback) {
 
-        // Cast identifier to usable form
+        BatchDataContainer batchDataContainer = new BatchDataContainer(signerId, batchId, batchDataList, startPosition);
-
-        if (!(batchIdentifier instanceof MultiServerBatchIdentifier)){
-            throw new IllegalArgumentException("Error: batch identifier supplied was not created by this class.");
-        }
-
-        MultiServerBatchIdentifier identifier = (MultiServerBatchIdentifier) batchIdentifier;
-
-        BatchDataContainer batchDataContainer = new BatchDataContainer(identifier, batchChunkList, startPosition);
 
         // Create job
         MultiServerPostBatchDataWorker worker =
@@ -166,26 +144,33 @@ public class ThreadedBulletinBoardClient extends SimpleBulletinBoardClient imple
     }
 
     @Override
-    public void postBatchData(BatchIdentifier batchIdentifier, List<BatchChunk> batchChunkList, FutureCallback<Boolean> callback)
+    public void postBatchData(byte[] signerId, int batchId, List<BatchData> batchDataList, FutureCallback<Boolean> callback) {
-            throws IllegalArgumentException {
 
-        postBatchData(batchIdentifier, batchChunkList, 0, callback);
+        postBatchData(signerId, batchId, batchDataList, 0, callback);
 
     }
 
     @Override
-    public void closeBatch(BatchIdentifier payload, Timestamp timestamp, Iterable<Signature> signatures, FutureCallback<Boolean> callback)
+    public void postBatchData(ByteString signerId, int batchId, List<BatchData> batchDataList,
-        throws IllegalArgumentException{
+                              int startPosition, FutureCallback<Boolean> callback) {
+
+        postBatchData(signerId.toByteArray(), batchId, batchDataList, startPosition, callback);
 
-        if (!(payload instanceof MultiServerBatchIdentifier)) {
-            throw new IllegalArgumentException("Error: batch identifier supplied was not created by this class.");
     }
 
-        MultiServerBatchIdentifier identifier = (MultiServerBatchIdentifier) payload;
+    @Override
+    public void postBatchData(ByteString signerId, int batchId, List<BatchData> batchDataList, FutureCallback<Boolean> callback) {
+
+        postBatchData(signerId, batchId, batchDataList, 0, callback);
+
+    }
+
+    @Override
+    public void closeBatch(CloseBatchMessage closeBatchMessage, FutureCallback<Boolean> callback) {
 
         // Create job
         MultiServerCloseBatchWorker worker =
-                new MultiServerCloseBatchWorker(clients, minAbsoluteRedundancy, identifier, timestamp, signatures, POST_MESSAGE_RETRY_NUM, callback);
+                new MultiServerCloseBatchWorker(clients, minAbsoluteRedundancy, closeBatchMessage, POST_MESSAGE_RETRY_NUM, callback);
 
         // Submit job
         executorService.submit(worker);
@@ -228,27 +213,11 @@ public class ThreadedBulletinBoardClient extends SimpleBulletinBoardClient imple
     }
 
     @Override
-    public void readMessage(MessageID msgID, FutureCallback<BulletinBoardMessage> callback) {
+    public void readBatch(BatchSpecificationMessage batchSpecificationMessage, FutureCallback<CompleteBatch> callback) {
 
         // Create job
-        MultiServerReadMessageWorker worker =
+        MultiServerReadBatchWorker worker =
-                new MultiServerReadMessageWorker(clients, minAbsoluteRedundancy, msgID, READ_MESSAGES_RETRY_NUM, callback);
+                new MultiServerReadBatchWorker(clients, minAbsoluteRedundancy, batchSpecificationMessage, READ_MESSAGES_RETRY_NUM, callback);
-
-        // Submit job
-        executorService.submit(worker);
-
-    }
-
-    @Override
-    public void readBatchData(BulletinBoardMessage stub, FutureCallback<BulletinBoardMessage> callback) throws IllegalArgumentException {
-
-        if (stub.getMsg().getDataTypeCase() != UnsignedBulletinBoardMessage.DataTypeCase.MSGID) {
-            throw new IllegalArgumentException("Message is not a stub and does not contain the required message ID");
-        }
-
-        // Create job
-        MultiServerReadBatchDataWorker worker =
-                new MultiServerReadBatchDataWorker(clients, minAbsoluteRedundancy, stub, READ_MESSAGES_RETRY_NUM, callback);
 
         // Submit job
         executorService.submit(worker);

bulletin-board-client/src/main/java/meerkat/bulletinboard/ThreadedBulletinBoardSubscriber.java

@@ -3,11 +3,12 @@ package meerkat.bulletinboard;
 import com.google.common.util.concurrent.FutureCallback;
 import com.google.protobuf.Timestamp;
 import meerkat.comm.CommunicationException;
-import meerkat.protobuf.BulletinBoardApi.*;
+import meerkat.protobuf.BulletinBoardAPI.*;
 import meerkat.util.BulletinBoardUtils;
 
-import static meerkat.protobuf.BulletinBoardApi.FilterType.*;
+import static meerkat.protobuf.BulletinBoardAPI.FilterType.*;
 
+import java.sql.Time;
 import java.util.*;
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -18,22 +19,20 @@ import java.util.concurrent.atomic.AtomicBoolean;
  */
 public class ThreadedBulletinBoardSubscriber implements BulletinBoardSubscriber {
 
-    protected final Collection<SubscriptionBulletinBoardClient> clients;
+    protected final Collection<SubscriptionAsyncBulletinBoardClient> clients;
     protected final BulletinBoardClient localClient;
 
-    protected Iterator<SubscriptionBulletinBoardClient> clientIterator;
+    protected Iterator<SubscriptionAsyncBulletinBoardClient> clientIterator;
-    protected SubscriptionBulletinBoardClient currentClient;
+    protected SubscriptionAsyncBulletinBoardClient currentClient;
 
     private long lastServerSwitchTime;
 
     private AtomicBoolean isSyncInProgress;
     private Semaphore rescheduleSemaphore;
 
-    private AtomicBoolean stopped;
-
     private static final Float[] BREAKPOINTS = {0.5f, 0.75f, 0.9f, 0.95f, 0.99f, 0.999f};
 
-    public ThreadedBulletinBoardSubscriber(Collection<SubscriptionBulletinBoardClient> clients, BulletinBoardClient localClient) {
+    public ThreadedBulletinBoardSubscriber(Collection<SubscriptionAsyncBulletinBoardClient> clients, BulletinBoardClient localClient) {
 
         this.clients = clients;
         this.localClient = localClient;
@@ -46,8 +45,6 @@ public class ThreadedBulletinBoardSubscriber implements BulletinBoardSubscriber
         isSyncInProgress = new AtomicBoolean(false);
         rescheduleSemaphore = new Semaphore(1);
 
-        stopped = new AtomicBoolean(false);
-
     }
 
     /**
@@ -135,7 +132,6 @@ public class ThreadedBulletinBoardSubscriber implements BulletinBoardSubscriber
 
                 //TODO: log
 
-                if (callback != null)
                 callback.onFailure(e); // Hard error: Cannot guarantee subscription safety
 
             }
@@ -222,7 +218,6 @@ public class ThreadedBulletinBoardSubscriber implements BulletinBoardSubscriber
         public void onSuccess(List<BulletinBoardMessage> result) {
 
             // Propagate result to caller
-            if (callback != null)
             callback.onSuccess(result);
 
             // Renew subscription
@@ -250,11 +245,11 @@ public class ThreadedBulletinBoardSubscriber implements BulletinBoardSubscriber
             super(filterList, callback);
         }
 
+
         @Override
         public void onSuccess(List<BulletinBoardMessage> result) {
 
             // Propagate result to caller
-            if (callback != null)
             callback.onSuccess(result);
 
         }
@@ -273,4 +268,5 @@ public class ThreadedBulletinBoardSubscriber implements BulletinBoardSubscriber
         subscribe(filterList, 0, callback);
     }
 
+
 }

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/multiserver/MultiServerBeginBatchWorker.java

@@ -1,96 +1,28 @@
 package meerkat.bulletinboard.workers.multiserver;
 
 import com.google.common.util.concurrent.FutureCallback;
-import meerkat.bulletinboard.MultiServerBatchIdentifier;
-import meerkat.bulletinboard.MultiServerWorker;
 import meerkat.bulletinboard.SingleServerBulletinBoardClient;
-import meerkat.bulletinboard.AsyncBulletinBoardClient.BatchIdentifier;
+import meerkat.protobuf.BulletinBoardAPI.BeginBatchMessage;
-import meerkat.comm.CommunicationException;
 
 import java.util.List;
-import java.util.concurrent.atomic.AtomicInteger;
 
 /**
  * Created by Arbel Deutsch Peled on 27-Dec-15.
  */
-public class MultiServerBeginBatchWorker extends MultiServerWorker<Iterable<String>, BatchIdentifier> {
+public class MultiServerBeginBatchWorker extends MultiServerGenericPostWorker<BeginBatchMessage> {
-
-    private BatchIdentifier[] identifiers;
-    private AtomicInteger remainingServers;
 
     public MultiServerBeginBatchWorker(List<SingleServerBulletinBoardClient> clients,
-                                       int minServers, Iterable<String> payload, int maxRetry,
+                                       int minServers, BeginBatchMessage payload, int maxRetry,
-                                       FutureCallback<BatchIdentifier> futureCallback) {
+                                       FutureCallback<Boolean> futureCallback) {
 
         super(clients, minServers, payload, maxRetry, futureCallback);
 
-        identifiers = new BatchIdentifier[clients.size()];
-
-        for (int i = 0 ; i < identifiers.length ; i++) {
-            identifiers[i] = null;
-        }
-
-        remainingServers = new AtomicInteger(clients.size());
-
-    }
-
-    private class BeginBatchCallback implements FutureCallback<BatchIdentifier> {
-
-        private final int clientNum;
-
-        public BeginBatchCallback(int clientNum) {
-            this.clientNum = clientNum;
-        }
-
-        private void finishPost() {
-
-            if (remainingServers.decrementAndGet() <= 0){
-
-                if (minServers.decrementAndGet() <= 0) {
-                    MultiServerBeginBatchWorker.this.onSuccess(new MultiServerBatchIdentifier(identifiers));
-                } else {
-                    MultiServerBeginBatchWorker.this.onFailure(new CommunicationException("Could not open batch in enough servers"));
-                }
-            }
-
     }
 
     @Override
-        public void onSuccess(BatchIdentifier result) {
+    protected void doPost(SingleServerBulletinBoardClient client, BeginBatchMessage payload) {
-
+        client.beginBatch(payload, this);
-            identifiers[clientNum] = result;
-            finishPost();
-
     }
 
-        @Override
-        public void onFailure(Throwable t) {
-            finishPost();
-        }
-    }
-
-    @Override
-    public void onSuccess(BatchIdentifier result) {
-        succeed(result);
-    }
-
-    @Override
-    public void onFailure(Throwable t) {
-        fail(t);
-    }
-
-    @Override
-    public void run() {
-
-        int clientNum = 0;
-
-        for (SingleServerBulletinBoardClient client : clients){
-
-            client.beginBatch(payload, new BeginBatchCallback(clientNum));
-
-            clientNum++;
 
 }
-
-    }
-}

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/multiserver/MultiServerCloseBatchWorker.java

@@ -1,83 +1,27 @@
 package meerkat.bulletinboard.workers.multiserver;
 
 import com.google.common.util.concurrent.FutureCallback;
-import com.google.protobuf.Timestamp;
-import meerkat.bulletinboard.AsyncBulletinBoardClient.BatchIdentifier;
-import meerkat.bulletinboard.BatchDataContainer;
-import meerkat.bulletinboard.MultiServerBatchIdentifier;
-import meerkat.bulletinboard.MultiServerWorker;
 import meerkat.bulletinboard.SingleServerBulletinBoardClient;
-import meerkat.crypto.DigitalSignature;
+import meerkat.protobuf.BulletinBoardAPI.CloseBatchMessage;
-import meerkat.protobuf.Crypto;
-import meerkat.protobuf.Crypto.Signature;
 
-import java.util.Iterator;
 import java.util.List;
 
 /**
  * Created by Arbel Deutsch Peled on 27-Dec-15.
  */
-public class MultiServerCloseBatchWorker extends MultiServerWorker<MultiServerBatchIdentifier, Boolean> {
+public class MultiServerCloseBatchWorker extends MultiServerGenericPostWorker<CloseBatchMessage> {
-
-    private final Timestamp timestamp;
-    private final Iterable<Crypto.Signature> signatures;
 
     public MultiServerCloseBatchWorker(List<SingleServerBulletinBoardClient> clients,
-                                       int minServers, MultiServerBatchIdentifier payload, Timestamp timestamp, Iterable<Crypto.Signature> signatures,
+                                       int minServers, CloseBatchMessage payload, int maxRetry,
-                                       int maxRetry, FutureCallback<Boolean> futureCallback) {
+                                       FutureCallback<Boolean> futureCallback) {
 
         super(clients, minServers, payload, maxRetry, futureCallback);
 
-        this.timestamp = timestamp;
-        this.signatures = signatures;
-
     }
 
     @Override
-    public void run() {
+    protected void doPost(SingleServerBulletinBoardClient client, CloseBatchMessage payload) {
-
+        client.closeBatch(payload, this);
-        Iterator<BatchIdentifier> identifierIterator = payload.getIdentifiers().iterator();
-
-        // Iterate through client
-
-        for (SingleServerBulletinBoardClient client : clients) {
-
-            if (identifierIterator.hasNext()) {
-
-                // Fetch the batch identifier supplied by the specific client (may be null if batch open failed on client
-
-                BatchIdentifier identifier = identifierIterator.next();
-
-                if (identifier != null) {
-
-                    // Post the data with the matching identifier to the client
-                    client.closeBatch(identifier, timestamp, signatures, this);
-
-                } else {
-
-                    // Count servers with no batch identifier as failed
-                    maxFailedServers.decrementAndGet();
-
-                }
-
-            }
-
-        }
-
-    }
-
-    @Override
-    public void onSuccess(Boolean result) {
-        if (minServers.decrementAndGet() <= 0){
-            succeed(result);
-        }
-    }
-
-    @Override
-    public void onFailure(Throwable t) {
-        if (maxFailedServers.decrementAndGet() <= 0){
-            fail(t);
-        }
     }
 
 

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/multiserver/MultiServerGenericPostWorker.java

@@ -35,9 +35,14 @@ public abstract class MultiServerGenericPostWorker<T> extends MultiServerWorker<
     public void run() {
 
         // Iterate through servers
-        for (SingleServerBulletinBoardClient client : clients) {
+
+        Iterator<SingleServerBulletinBoardClient> clientIterator = getClientIterator();
+
+        while (clientIterator.hasNext()) {
 
             // Send request to Server
+            SingleServerBulletinBoardClient client = clientIterator.next();
+
             doPost(client, payload);
 
         }

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/multiserver/MultiServerGenericReadWorker.java

@@ -14,9 +14,7 @@ import java.util.List;
  */
 public abstract class MultiServerGenericReadWorker<IN, OUT> extends MultiServerWorker<IN, OUT>{
 
-    private Iterator<SingleServerBulletinBoardClient> clientIterator;
+    private final Iterator<SingleServerBulletinBoardClient> clientIterator;
-
-    private String errorString;
 
     public MultiServerGenericReadWorker(List<SingleServerBulletinBoardClient> clients,
                                         int minServers, IN payload, int maxRetry,
@@ -24,8 +22,7 @@ public abstract class MultiServerGenericReadWorker<IN, OUT> extends MultiServerW
 
         super(clients, true, minServers, payload, maxRetry, futureCallback); // Shuffle clients on creation to balance load
 
-        clientIterator = clients.iterator();
+        clientIterator = getClientIterator();
-        errorString = "";
 
     }
 
@@ -49,7 +46,7 @@ public abstract class MultiServerGenericReadWorker<IN, OUT> extends MultiServerW
             doRead(payload, client);
 
         } else {
-            fail(new CommunicationException("Could not contact any server. Errors follow:\n" + errorString));
+            fail(new CommunicationException("Could not contact any server"));
         }
 
     }
@@ -61,8 +58,6 @@ public abstract class MultiServerGenericReadWorker<IN, OUT> extends MultiServerW
 
     @Override
     public void onFailure(Throwable t) {
-        //TODO: log
-        errorString += t.getCause() + " " + t.getMessage() + "\n";
         run(); // Retry with next server
     }
 

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/multiserver/MultiServerGetRedundancyWorker.java

@@ -4,7 +4,7 @@ import com.google.common.util.concurrent.FutureCallback;
 import meerkat.bulletinboard.MultiServerWorker;
 import meerkat.bulletinboard.SingleServerBulletinBoardClient;
 import meerkat.comm.CommunicationException;
-import meerkat.protobuf.BulletinBoardApi.*;
+import meerkat.protobuf.BulletinBoardAPI.*;
 
 import java.util.Iterator;
 import java.util.List;
@@ -36,8 +36,13 @@ public class MultiServerGetRedundancyWorker extends MultiServerWorker<MessageID,
      */
     public void run(){
 
+        Iterator<SingleServerBulletinBoardClient> clientIterator = getClientIterator();
+
         // Iterate through clients
-        for (SingleServerBulletinBoardClient client : clients) {
+
+        while (clientIterator.hasNext()) {
+
+            SingleServerBulletinBoardClient client = clientIterator.next();
 
             // Send request to client
             client.getRedundancy(payload,this);

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/multiserver/MultiServerPostBatchDataWorker.java

@@ -1,18 +1,15 @@
 package meerkat.bulletinboard.workers.multiserver;
 
 import com.google.common.util.concurrent.FutureCallback;
-import meerkat.bulletinboard.AsyncBulletinBoardClient.BatchIdentifier;
-import meerkat.bulletinboard.MultiServerWorker;
 import meerkat.bulletinboard.SingleServerBulletinBoardClient;
 import meerkat.bulletinboard.BatchDataContainer;
 
-import java.util.Iterator;
 import java.util.List;
 
 /**
  * Created by Arbel Deutsch Peled on 27-Dec-15.
  */
-public class MultiServerPostBatchDataWorker extends MultiServerWorker<BatchDataContainer, Boolean> {
+public class MultiServerPostBatchDataWorker extends MultiServerGenericPostWorker<BatchDataContainer> {
 
     public MultiServerPostBatchDataWorker(List<SingleServerBulletinBoardClient> clients,
                                           int minServers, BatchDataContainer payload, int maxRetry,
@@ -23,50 +20,9 @@ public class MultiServerPostBatchDataWorker extends MultiServerWorker<BatchDataC
     }
 
     @Override
-    public void run() {
+    protected void doPost(SingleServerBulletinBoardClient client, BatchDataContainer payload) {
-
+        client.postBatchData(payload.signerId, payload.batchId, payload.batchDataList, payload.startPosition, this);
-        Iterator<BatchIdentifier> identifierIterator = payload.batchId.getIdentifiers().iterator();
-
-        // Iterate through client
-
-        for (SingleServerBulletinBoardClient client : clients) {
-
-            if (identifierIterator.hasNext()) {
-
-                // Fetch the batch identifier supplied by the specific client (may be null if batch open failed on client
-
-                BatchIdentifier identifier = identifierIterator.next();
-
-                if (identifier != null) {
-
-                    // Post the data with the matching identifier to the client
-                    client.postBatchData(identifier, payload.batchChunkList, payload.startPosition, this);
-
-                } else {
-
-                    // Count servers with no batch identifier as failed
-                    maxFailedServers.decrementAndGet();
-
     }
 
-            }
-
-        }
-
-    }
-
-    @Override
-    public void onSuccess(Boolean result) {
-        if (minServers.decrementAndGet() <= 0){
-            succeed(result);
-        }
-    }
-
-    @Override
-    public void onFailure(Throwable t) {
-        if (maxFailedServers.decrementAndGet() <= 0){
-            fail(t);
-        }
-    }
 
 }

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/multiserver/MultiServerPostBatchWorker.java

@@ -1,33 +1,27 @@
 package meerkat.bulletinboard.workers.multiserver;
 
 import com.google.common.util.concurrent.FutureCallback;
+import meerkat.bulletinboard.CompleteBatch;
 import meerkat.bulletinboard.SingleServerBulletinBoardClient;
-import meerkat.protobuf.BulletinBoardApi.BulletinBoardMessage;
 
 import java.util.List;
 
 /**
  * Created by Arbel Deutsch Peled on 27-Dec-15.
  */
-public class MultiServerPostBatchWorker extends MultiServerGenericPostWorker<BulletinBoardMessage> {
+public class MultiServerPostBatchWorker extends MultiServerGenericPostWorker<CompleteBatch> {
-
-    private final int chunkSize;
 
     public MultiServerPostBatchWorker(List<SingleServerBulletinBoardClient> clients,
-                                      int minServers, BulletinBoardMessage payload, int chunkSize, int maxRetry,
+                                      int minServers, CompleteBatch payload, int maxRetry,
                                       FutureCallback<Boolean> futureCallback) {
 
         super(clients, minServers, payload, maxRetry, futureCallback);
 
-        this.chunkSize = chunkSize;
-
     }
 
     @Override
-    protected void doPost(SingleServerBulletinBoardClient client, BulletinBoardMessage payload) {
+    protected void doPost(SingleServerBulletinBoardClient client, CompleteBatch payload) {
-
+        client.postBatch(payload, this);
-        client.postAsBatch(payload, chunkSize, this);
-
     }
 
 

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/multiserver/MultiServerPostMessageWorker.java

@@ -2,7 +2,7 @@ package meerkat.bulletinboard.workers.multiserver;
 
 import com.google.common.util.concurrent.FutureCallback;
 import meerkat.bulletinboard.SingleServerBulletinBoardClient;
-import meerkat.protobuf.BulletinBoardApi.*;
+import meerkat.protobuf.BulletinBoardAPI.*;
 
 import java.util.List;
 

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/multiserver/MultiServerReadBatchDataWorker.java

@@ -1,29 +0,0 @@
-package meerkat.bulletinboard.workers.multiserver;
-
-import com.google.common.util.concurrent.FutureCallback;
-import meerkat.bulletinboard.SingleServerBulletinBoardClient;
-import meerkat.protobuf.BulletinBoardApi.*;
-
-import java.util.List;
-
-
-/**
- * Created by Arbel Deutsch Peled on 27-Dec-15.
- */
-public class MultiServerReadBatchDataWorker extends MultiServerGenericReadWorker<BulletinBoardMessage, BulletinBoardMessage> {
-
-    public MultiServerReadBatchDataWorker(List<SingleServerBulletinBoardClient> clients,
-                                          int minServers, BulletinBoardMessage payload, int maxRetry,
-                                          FutureCallback<BulletinBoardMessage> futureCallback) {
-
-        super(clients, minServers, payload, maxRetry, futureCallback);
-
-    }
-
-    @Override
-    protected void doRead(BulletinBoardMessage payload, SingleServerBulletinBoardClient client) {
-        client.readBatchData(payload, this);
-    }
-
-
-}

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/multiserver/MultiServerReadBatchWorker.java

@@ -0,0 +1,30 @@
+package meerkat.bulletinboard.workers.multiserver;
+
+import com.google.common.util.concurrent.FutureCallback;
+import meerkat.bulletinboard.CompleteBatch;
+import meerkat.bulletinboard.SingleServerBulletinBoardClient;
+import meerkat.protobuf.BulletinBoardAPI.BatchSpecificationMessage;
+
+import java.util.List;
+
+
+/**
+ * Created by Arbel Deutsch Peled on 27-Dec-15.
+ */
+public class MultiServerReadBatchWorker extends MultiServerGenericReadWorker<BatchSpecificationMessage, CompleteBatch> {
+
+    public MultiServerReadBatchWorker(List<SingleServerBulletinBoardClient> clients,
+                                      int minServers, BatchSpecificationMessage payload, int maxRetry,
+                                      FutureCallback<CompleteBatch> futureCallback) {
+
+        super(clients, minServers, payload, maxRetry, futureCallback);
+
+    }
+
+    @Override
+    protected void doRead(BatchSpecificationMessage payload, SingleServerBulletinBoardClient client) {
+        client.readBatch(payload, this);
+    }
+
+
+}

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/multiserver/MultiServerReadMessageWorker.java

@@ -1,30 +0,0 @@
-package meerkat.bulletinboard.workers.multiserver;
-
-import com.google.common.util.concurrent.FutureCallback;
-import meerkat.bulletinboard.SingleServerBulletinBoardClient;
-import meerkat.protobuf.BulletinBoardApi.BulletinBoardMessage;
-import meerkat.protobuf.BulletinBoardApi.MessageID;
-
-import java.util.List;
-
-
-/**
- * Created by Arbel Deutsch Peled on 27-Dec-15.
- */
-public class MultiServerReadMessageWorker extends MultiServerGenericReadWorker<MessageID, BulletinBoardMessage> {
-
-    public MultiServerReadMessageWorker(List<SingleServerBulletinBoardClient> clients,
-                                        int minServers, MessageID payload, int maxRetry,
-                                        FutureCallback<BulletinBoardMessage> futureCallback) {
-
-        super(clients, minServers, payload, maxRetry, futureCallback);
-
-    }
-
-    @Override
-    protected void doRead(MessageID payload, SingleServerBulletinBoardClient client) {
-        client.readMessage(payload, this);
-    }
-
-
-}

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/multiserver/MultiServerReadMessagesWorker.java

@@ -2,7 +2,7 @@ package meerkat.bulletinboard.workers.multiserver;
 
 import com.google.common.util.concurrent.FutureCallback;
 import meerkat.bulletinboard.SingleServerBulletinBoardClient;
-import meerkat.protobuf.BulletinBoardApi.*;
+import meerkat.protobuf.BulletinBoardAPI.*;
 
 import java.util.List;
 

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/singleserver/SingleServerBeginBatchWorker.java

@@ -1,53 +1,17 @@
 package meerkat.bulletinboard.workers.singleserver;
 
-import com.google.protobuf.Int64Value;
+import meerkat.protobuf.BulletinBoardAPI.BeginBatchMessage;
-import meerkat.bulletinboard.SingleServerWorker;
-import meerkat.comm.CommunicationException;
-import meerkat.protobuf.BulletinBoardApi.BeginBatchMessage;
-import meerkat.rest.Constants;
-
-import javax.ws.rs.ProcessingException;
-import javax.ws.rs.client.Client;
-import javax.ws.rs.client.Entity;
-import javax.ws.rs.client.WebTarget;
-import javax.ws.rs.core.Response;
 
 import static meerkat.bulletinboard.BulletinBoardConstants.BEGIN_BATCH_PATH;
-import static meerkat.bulletinboard.BulletinBoardConstants.BULLETIN_BOARD_SERVER_PATH;
 
 /**
  * Created by Arbel Deutsch Peled on 27-Dec-15.
  * Tries to contact server once and perform a post operation
  */
-public class SingleServerBeginBatchWorker extends SingleServerWorker<BeginBatchMessage,Int64Value> {
+public class SingleServerBeginBatchWorker extends SingleServerGenericPostWorker<BeginBatchMessage> {
 
     public SingleServerBeginBatchWorker(String serverAddress, BeginBatchMessage payload, int maxRetry) {
-        super(serverAddress, payload, maxRetry);
+        super(serverAddress, BEGIN_BATCH_PATH, payload, maxRetry);
     }
 
-    @Override
-    public Int64Value call() throws Exception {
-        Client client = clientLocal.get();
-
-        WebTarget webTarget = client.target(serverAddress).path(BULLETIN_BOARD_SERVER_PATH).path(BEGIN_BATCH_PATH);
-        Response response = webTarget.request(Constants.MEDIATYPE_PROTOBUF).post(
-                Entity.entity(payload, Constants.MEDIATYPE_PROTOBUF));
-
-        try {
-
-            Int64Value result =  response.readEntity(Int64Value.class);
-            return result;
-
-        } catch (ProcessingException | IllegalStateException e) {
-
-            // Post to this server failed
-            throw new CommunicationException("Could not contact the server. Original error: " + e.getMessage());
-
-        } catch (Exception e) {
-            throw new CommunicationException("Could not contact the server. Original error: " + e.getMessage());
-        }
-        finally {
-            response.close();
-        }
-    }
 }

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/singleserver/SingleServerCloseBatchWorker.java

@@ -1,12 +1,12 @@
 package meerkat.bulletinboard.workers.singleserver;
 
-import meerkat.protobuf.BulletinBoardApi.CloseBatchMessage;
+import meerkat.protobuf.BulletinBoardAPI.CloseBatchMessage;
 
 import static meerkat.bulletinboard.BulletinBoardConstants.CLOSE_BATCH_PATH;
 
 /**
  * Created by Arbel Deutsch Peled on 27-Dec-15.
- * Tries to contact server once and perform a stop batch operation
+ * Tries to contact server once and perform a close batch operation
  */
 public class SingleServerCloseBatchWorker extends SingleServerGenericPostWorker<CloseBatchMessage> {
 

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/singleserver/SingleServerGenerateSyncQueryWorker.java

@@ -1,55 +0,0 @@
-package meerkat.bulletinboard.workers.singleserver;
-
-import com.google.protobuf.Int64Value;
-import meerkat.bulletinboard.SingleServerWorker;
-import meerkat.comm.CommunicationException;
-import meerkat.protobuf.BulletinBoardApi.SyncQuery;
-import meerkat.protobuf.BulletinBoardApi.GenerateSyncQueryParams;
-import meerkat.rest.Constants;
-
-import javax.ws.rs.ProcessingException;
-import javax.ws.rs.client.Client;
-import javax.ws.rs.client.Entity;
-import javax.ws.rs.client.WebTarget;
-import javax.ws.rs.core.Response;
-
-import static meerkat.bulletinboard.BulletinBoardConstants.BULLETIN_BOARD_SERVER_PATH;
-import static meerkat.bulletinboard.BulletinBoardConstants.GENERATE_SYNC_QUERY_PATH;
-
-/**
- * Created by Arbel Deutsch Peled on 27-Dec-15.
- * Tries to contact server once and perform a Sync Query Generation operation
- */
-public class SingleServerGenerateSyncQueryWorker extends SingleServerWorker<GenerateSyncQueryParams,SyncQuery> {
-
-    public SingleServerGenerateSyncQueryWorker(String serverAddress, GenerateSyncQueryParams payload, int maxRetry) {
-        super(serverAddress, payload, maxRetry);
-    }
-
-    @Override
-    public SyncQuery call() throws Exception {
-
-        Client client = clientLocal.get();
-
-        WebTarget webTarget = client.target(serverAddress).path(BULLETIN_BOARD_SERVER_PATH).path(GENERATE_SYNC_QUERY_PATH);
-
-        Response response = webTarget.request(Constants.MEDIATYPE_PROTOBUF).post(Entity.entity(payload, Constants.MEDIATYPE_PROTOBUF));
-
-        try {
-
-            SyncQuery result = response.readEntity(SyncQuery.class);
-            return result;
-
-        } catch (ProcessingException | IllegalStateException e) {
-
-            // Post to this server failed
-            throw new CommunicationException("Could not contact the server. Original error: " + e.getMessage());
-
-        } catch (Exception e) {
-            throw new CommunicationException("Could not contact the server. Original error: " + e.getMessage());
-        }
-        finally {
-            response.close();
-        }
-    }
-}

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/singleserver/SingleServerGenericPostWorker.java

@@ -1,9 +1,8 @@
 package meerkat.bulletinboard.workers.singleserver;
 
-import com.google.protobuf.BoolValue;
 import meerkat.bulletinboard.SingleServerWorker;
 import meerkat.comm.CommunicationException;
-import meerkat.protobuf.Comm.*;
+import meerkat.protobuf.BulletinBoardAPI.BoolMsg;
 import meerkat.rest.Constants;
 
 import javax.ws.rs.ProcessingException;
@@ -44,8 +43,8 @@ public class SingleServerGenericPostWorker<T> extends SingleServerWorker<T, Bool
 
         try {
 
-            // If a BoolValue entity is returned: the post was successful
+            // If a BoolMsg entity is returned: the post was successful
-            response.readEntity(BoolValue.class);
+            response.readEntity(BoolMsg.class);
             return Boolean.TRUE;
 
         } catch (ProcessingException | IllegalStateException e) {

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/singleserver/SingleServerGetRedundancyWorker.java

@@ -3,9 +3,10 @@ package meerkat.bulletinboard.workers.singleserver;
 import meerkat.bulletinboard.SingleServerWorker;
 import meerkat.comm.CommunicationException;
 import meerkat.comm.MessageInputStream;
-import meerkat.protobuf.BulletinBoardApi.*;
+import meerkat.protobuf.BulletinBoardAPI.*;
 import meerkat.rest.Constants;
 
+import javax.ws.rs.ProcessingException;
 import javax.ws.rs.client.Client;
 import javax.ws.rs.client.Entity;
 import javax.ws.rs.client.WebTarget;
@@ -13,6 +14,7 @@ import javax.ws.rs.core.Response;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.lang.reflect.InvocationTargetException;
 
 import static meerkat.bulletinboard.BulletinBoardConstants.BULLETIN_BOARD_SERVER_PATH;
 import static meerkat.bulletinboard.BulletinBoardConstants.READ_MESSAGES_PATH;

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/singleserver/SingleServerPostBatchWorker.java

@@ -1,6 +1,6 @@
 package meerkat.bulletinboard.workers.singleserver;
 
-import meerkat.protobuf.BulletinBoardApi.BatchMessage;
+import meerkat.protobuf.BulletinBoardAPI.BatchMessage;
 
 import static meerkat.bulletinboard.BulletinBoardConstants.POST_BATCH_PATH;
 

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/singleserver/SingleServerPostMessageWorker.java

@@ -1,6 +1,6 @@
 package meerkat.bulletinboard.workers.singleserver;
 
-import meerkat.protobuf.BulletinBoardApi.BulletinBoardMessage;
+import meerkat.protobuf.BulletinBoardAPI.BulletinBoardMessage;
 
 import static meerkat.bulletinboard.BulletinBoardConstants.POST_MESSAGE_PATH;
 

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/singleserver/SingleServerQuerySyncWorker.java

@@ -2,8 +2,8 @@ package meerkat.bulletinboard.workers.singleserver;
 
 import meerkat.bulletinboard.SingleServerWorker;
 import meerkat.comm.CommunicationException;
-import meerkat.protobuf.BulletinBoardApi.SyncQuery;
+import meerkat.protobuf.BulletinBoardAPI.SyncQuery;
-import meerkat.protobuf.BulletinBoardApi.SyncQueryResponse;
+import meerkat.protobuf.BulletinBoardAPI.SyncQueryResponse;
 import meerkat.rest.Constants;
 
 import javax.ws.rs.ProcessingException;

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/singleserver/SingleServerReadBatchWorker.java

@@ -1,28 +1,35 @@
 package meerkat.bulletinboard.workers.singleserver;
 
+import meerkat.bulletinboard.CompleteBatch;
 import meerkat.bulletinboard.SingleServerWorker;
 import meerkat.comm.CommunicationException;
 import meerkat.comm.MessageInputStream;
-import meerkat.protobuf.BulletinBoardApi.*;
+import meerkat.protobuf.BulletinBoardAPI.*;
 import meerkat.rest.Constants;
 
+import javax.ws.rs.ProcessingException;
 import javax.ws.rs.client.Client;
 import javax.ws.rs.client.Entity;
 import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.core.GenericType;
+import javax.ws.rs.core.Response;
 import java.io.IOException;
 import java.io.InputStream;
 import java.lang.reflect.InvocationTargetException;
 import java.util.List;
 
 import static meerkat.bulletinboard.BulletinBoardConstants.BULLETIN_BOARD_SERVER_PATH;
+import static meerkat.bulletinboard.BulletinBoardConstants.READ_MESSAGES_PATH;
 import static meerkat.bulletinboard.BulletinBoardConstants.READ_BATCH_PATH;
 
+import static meerkat.bulletinboard.BulletinBoardConstants.BATCH_ID_TAG_PREFIX;
+
 /**
  * Created by Arbel Deutsch Peled on 27-Dec-15.
  */
-public class SingleServerReadBatchWorker extends SingleServerWorker<BatchQuery, List<BatchChunk>> {
+public class SingleServerReadBatchWorker extends SingleServerWorker<BatchSpecificationMessage, List<BatchData>> {
 
-    public SingleServerReadBatchWorker(String serverAddress, BatchQuery payload, int maxRetry) {
+    public SingleServerReadBatchWorker(String serverAddress, BatchSpecificationMessage payload, int maxRetry) {
         super(serverAddress, payload, maxRetry);
     }
 
@@ -32,7 +39,7 @@ public class SingleServerReadBatchWorker extends SingleServerWorker<BatchQuery,
      * @return the complete batch as read from the server
      * @throws CommunicationException if the server's response is invalid
      */
-    public List<BatchChunk> call() throws CommunicationException{
+    public List<BatchData> call() throws CommunicationException{
 
         Client client = clientLocal.get();
 
@@ -43,11 +50,11 @@ public class SingleServerReadBatchWorker extends SingleServerWorker<BatchQuery,
         webTarget = client.target(serverAddress).path(BULLETIN_BOARD_SERVER_PATH).path(READ_BATCH_PATH);
         InputStream in = webTarget.request(Constants.MEDIATYPE_PROTOBUF).post(Entity.entity(payload, Constants.MEDIATYPE_PROTOBUF), InputStream.class);
 
-        MessageInputStream<BatchChunk> inputStream = null;
+        MessageInputStream<BatchData> inputStream = null;
 
         try {
 
-            inputStream = MessageInputStream.MessageInputStreamFactory.createMessageInputStream(in, BatchChunk.class);
+            inputStream = MessageInputStream.MessageInputStreamFactory.createMessageInputStream(in, BatchData.class);
 
             return inputStream.asList();
 

bulletin-board-client/src/main/java/meerkat/bulletinboard/workers/singleserver/SingleServerReadMessagesWorker.java

@@ -3,10 +3,10 @@ package meerkat.bulletinboard.workers.singleserver;
 import meerkat.bulletinboard.SingleServerWorker;
 import meerkat.comm.CommunicationException;
 import meerkat.comm.MessageInputStream;
-import meerkat.protobuf.BulletinBoardApi;
+import meerkat.protobuf.BulletinBoardAPI;
-import meerkat.protobuf.BulletinBoardApi.BulletinBoardMessageList;
+import meerkat.protobuf.BulletinBoardAPI.BulletinBoardMessageList;
-import meerkat.protobuf.BulletinBoardApi.MessageFilterList;
+import meerkat.protobuf.BulletinBoardAPI.MessageFilterList;
-import meerkat.protobuf.BulletinBoardApi.BulletinBoardMessage;
+import meerkat.protobuf.BulletinBoardAPI.BulletinBoardMessage;
 import meerkat.rest.Constants;
 
 import javax.ws.rs.ProcessingException;

bulletin-board-client/src/test/java/meerkat/bulletinboard/BulletinBoardSynchronizerTest.java

@@ -1,318 +0,0 @@
-package meerkat.bulletinboard;
-
-import com.google.common.util.concurrent.FutureCallback;
-import com.google.protobuf.*;
-import com.google.protobuf.Timestamp;
-
-import static meerkat.bulletinboard.BulletinBoardSynchronizer.SyncStatus;
-
-import meerkat.bulletinboard.sqlserver.BulletinBoardSQLServer;
-import meerkat.bulletinboard.sqlserver.H2QueryProvider;
-
-import meerkat.comm.CommunicationException;
-import meerkat.crypto.concrete.ECDSASignature;
-import meerkat.protobuf.BulletinBoardApi.*;
-import meerkat.util.BulletinBoardMessageComparator;
-import meerkat.util.BulletinBoardMessageGenerator;
-import org.junit.*;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.security.*;
-import java.security.cert.CertificateException;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Random;
-import java.util.concurrent.Semaphore;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.TimeoutException;
-import java.util.concurrent.atomic.AtomicBoolean;
-
-import static org.hamcrest.MatcherAssert.assertThat;
-import static org.junit.Assert.fail;
-
-/**
- * Created by Arbel on 6/1/2016.
- */
-public class BulletinBoardSynchronizerTest {
-
-    private static final String REMOTE_SERVER_ADDRESS = "remoteDB";
-    private static final String LOCAL_SERVER_ADDRESS = "localDB";
-    private static int testCount;
-
-    private static final int THREAD_NUM = 3;
-    private static final int SUBSCRIPTION_INTERVAL = 1000;
-
-    private static final int SYNC_SLEEP_INTERVAL = 500;
-    private static final int SYNC_WAIT_CAP = 1000;
-
-    private DeletableSubscriptionBulletinBoardClient localClient;
-    private AsyncBulletinBoardClient remoteClient;
-
-    private BulletinBoardSynchronizer synchronizer;
-
-    private static BulletinBoardMessageGenerator messageGenerator;
-    private static BulletinBoardMessageComparator messageComparator;
-
-    private static String KEYFILE_EXAMPLE = "/certs/enduser-certs/user1-key-with-password-secret.p12";
-    private static String KEYFILE_PASSWORD1 = "secret";
-    private static String CERT1_PEM_EXAMPLE = "/certs/enduser-certs/user1.crt";
-
-    private static BulletinBoardSignature[] signers;
-    private static ByteString[] signerIDs;
-
-    private Semaphore semaphore;
-    private List<Throwable> thrown;
-
-    @BeforeClass
-    public static void build() {
-
-        messageGenerator = new BulletinBoardMessageGenerator(new Random(0));
-        messageComparator = new BulletinBoardMessageComparator();
-
-        signers = new BulletinBoardSignature[1];
-        signerIDs = new ByteString[1];
-
-        signers[0] = new GenericBulletinBoardSignature(new ECDSASignature());
-        signerIDs[0] = signers[0].getSignerID();
-
-        InputStream keyStream = BulletinBoardSynchronizerTest.class.getResourceAsStream(KEYFILE_EXAMPLE);
-        char[] password = KEYFILE_PASSWORD1.toCharArray();
-
-        try {
-
-            KeyStore.Builder keyStoreBuilder = signers[0].getPKCS12KeyStoreBuilder(keyStream, password);
-
-            signers[0].loadSigningCertificate(keyStoreBuilder);
-
-            signers[0].loadVerificationCertificates(BulletinBoardSynchronizerTest.class.getResourceAsStream(CERT1_PEM_EXAMPLE));
-
-        } catch (IOException e) {
-            System.err.println("Failed reading from signature file " + e.getMessage());
-            fail("Failed reading from signature file " + e.getMessage());
-        } catch (CertificateException e) {
-            System.err.println("Failed reading certificate " + e.getMessage());
-            fail("Failed reading certificate " + e.getMessage());
-        } catch (KeyStoreException e) {
-            System.err.println("Failed reading keystore " + e.getMessage());
-            fail("Failed reading keystore " + e.getMessage());
-        } catch (NoSuchAlgorithmException e) {
-            System.err.println("Couldn't find signing algorithm " + e.getMessage());
-            fail("Couldn't find signing algorithm " + e.getMessage());
-        } catch (UnrecoverableKeyException e) {
-            System.err.println("Couldn't find signing key " + e.getMessage());
-            fail("Couldn't find signing key " + e.getMessage());
-        }
-
-        signerIDs[0] = signers[0].getSignerID();
-
-        testCount = 0;
-
-    }
-
-    @Before
-    public void init() throws CommunicationException {
-
-        DeletableBulletinBoardServer remoteServer = new BulletinBoardSQLServer(new H2QueryProvider(REMOTE_SERVER_ADDRESS + testCount));
-        remoteServer.init();
-
-        remoteClient = new LocalBulletinBoardClient(
-                remoteServer,
-                THREAD_NUM,
-                SUBSCRIPTION_INTERVAL);
-
-        DeletableBulletinBoardServer localServer = new BulletinBoardSQLServer(new H2QueryProvider(LOCAL_SERVER_ADDRESS + testCount));
-        localServer.init();
-
-        localClient = new LocalBulletinBoardClient(
-                localServer,
-                THREAD_NUM,
-                SUBSCRIPTION_INTERVAL);
-
-        synchronizer = new SimpleBulletinBoardSynchronizer(SYNC_SLEEP_INTERVAL, SYNC_WAIT_CAP);
-        synchronizer.init(localClient, remoteClient);
-
-        semaphore = new Semaphore(0);
-        thrown = new LinkedList<>();
-
-        testCount++;
-
-    }
-
-    private class SyncStatusCallback implements FutureCallback<SyncStatus> {
-
-        private final SyncStatus statusToWaitFor;
-        private AtomicBoolean stillWaiting;
-
-        public SyncStatusCallback(SyncStatus statusToWaitFor) {
-            this.statusToWaitFor = statusToWaitFor;
-            stillWaiting = new AtomicBoolean(true);
-        }
-
-        @Override
-        public void onSuccess(SyncStatus result) {
-
-            if (result == statusToWaitFor && stillWaiting.compareAndSet(true, false)){
-                semaphore.release();
-            }
-
-        }
-
-        @Override
-        public void onFailure(Throwable t) {
-            thrown.add(t);
-            if (stillWaiting.compareAndSet(true,false)) {
-                semaphore.release();
-            }
-        }
-    }
-
-    private class MessageCountCallback implements FutureCallback<Integer> {
-
-        private int[] expectedCounts;
-        private int currentIteration;
-
-        public MessageCountCallback(int[] expectedCounts) {
-            this.expectedCounts = expectedCounts;
-            this.currentIteration = 0;
-        }
-
-        @Override
-        public void onSuccess(Integer result) {
-
-            if (currentIteration < expectedCounts.length){
-                if (result != expectedCounts[currentIteration]){
-                    onFailure(new AssertionError("Wrong message count. Expected " + expectedCounts[currentIteration] + " but received " + result));
-                    currentIteration = expectedCounts.length;
-                    return;
-                }
-            }
-
-            currentIteration++;
-
-            if (currentIteration == expectedCounts.length)
-                semaphore.release();
-        }
-
-        @Override
-        public void onFailure(Throwable t) {
-            thrown.add(t);
-            semaphore.release();
-        }
-    }
-
-    @Test
-    public void testSync() throws SignatureException, CommunicationException, InterruptedException {
-
-        Timestamp timestamp = Timestamp.newBuilder()
-                .setSeconds(15252162)
-                .setNanos(85914)
-                .build();
-
-        BulletinBoardMessage msg = messageGenerator.generateRandomMessage(signers, timestamp, 10, 10);
-
-        MessageID msgID = localClient.postMessage(msg);
-
-        timestamp = Timestamp.newBuilder()
-                .setSeconds(51511653)
-                .setNanos(3625)
-                .build();
-
-        BulletinBoardMessage batchMessage = messageGenerator.generateRandomMessage(signers,timestamp,  100, 10);
-
-        MessageID batchMsgID = localClient.postAsBatch(batchMessage, 10);
-
-        BulletinBoardMessage test = localClient.readMessage(batchMsgID);
-
-        BulletinBoardMessage stub = localClient.readMessages(MessageFilterList.newBuilder()
-                .addFilter(MessageFilter.newBuilder()
-                        .setType(FilterType.MSG_ID)
-                        .setId(batchMsgID.getID())
-                        .build())
-                .build()).get(0);
-
-        BulletinBoardMessage test2 = localClient.readBatchData(stub);
-
-        synchronizer.subscribeToSyncStatus(new SyncStatusCallback(SyncStatus.SYNCHRONIZED));
-
-        int[] expectedCounts = {2,0};
-        synchronizer.subscribeToRemainingMessagesCount(new MessageCountCallback(expectedCounts));
-
-        Thread syncThread = new Thread(synchronizer);
-        syncThread.start();
-
-        if (!semaphore.tryAcquire(2, 4000, TimeUnit.MILLISECONDS)) {
-            thrown.add(new TimeoutException("Timeout occurred while waiting for synchronizer to sync."));
-        }
-
-        synchronizer.stop();
-        syncThread.join();
-
-        if (thrown.size() > 0) {
-            for (Throwable t : thrown)
-                System.err.println(t.getMessage());
-            assertThat("Exception thrown by Synchronizer: " + thrown.get(0).getMessage(), false);
-        }
-
-        List<BulletinBoardMessage> msgList = remoteClient.readMessages(MessageFilterList.newBuilder()
-                .addFilter(MessageFilter.newBuilder()
-                        .setType(FilterType.MSG_ID)
-                        .setId(msgID.getID())
-                        .build())
-                .build());
-
-        assertThat("Wrong number of messages returned.", msgList.size() == 1);
-        assertThat("Returned message is not equal to original one", messageComparator.compare(msgList.get(0),msg) == 0);
-
-        BulletinBoardMessage returnedBatchMsg = remoteClient.readMessage(batchMsgID);
-
-        assertThat("Returned batch does not equal original one.", messageComparator.compare(returnedBatchMsg, batchMessage) == 0);
-
-    }
-
-    @Test
-    public void testServerError() throws SignatureException, CommunicationException, InterruptedException {
-
-        Timestamp timestamp = Timestamp.newBuilder()
-                .setSeconds(945736256)
-                .setNanos(276788)
-                .build();
-
-        BulletinBoardMessage msg = messageGenerator.generateRandomMessage(signers, timestamp, 10, 10);
-
-        remoteClient.close();
-
-        synchronizer.subscribeToSyncStatus(new SyncStatusCallback(SyncStatus.SERVER_ERROR));
-
-        localClient.postMessage(msg);
-
-        Thread thread = new Thread(synchronizer);
-
-        thread.start();
-
-        if (!semaphore.tryAcquire(4000, TimeUnit.MILLISECONDS)) {
-            thrown.add(new TimeoutException("Timeout occurred while waiting for synchronizer to sync."));
-        }
-
-        synchronizer.stop();
-        thread.join();
-
-    }
-
-    @After
-    public void close() {
-
-        if (thrown.size() > 0) {
-            for (Throwable t : thrown) {
-                System.err.println(t.getMessage());
-            }
-            assertThat("Exception thrown by Synchronizer: " + thrown.get(0).getMessage(), false);
-        }
-
-        synchronizer.stop();
-        localClient.close();
-        remoteClient.close();
-
-    }
-
-}

bulletin-board-client/src/test/java/meerkat/bulletinboard/CachedBulletinBoardClientTest.java

@@ -1,111 +0,0 @@
-package meerkat.bulletinboard;
-
-import meerkat.bulletinboard.sqlserver.BulletinBoardSQLServer;
-import meerkat.bulletinboard.sqlserver.H2QueryProvider;
-import meerkat.comm.CommunicationException;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-
-import java.security.SignatureException;
-import java.util.LinkedList;
-import java.util.List;
-
-/**
- * Created by Arbel on 6/27/2016.
- */
-public class CachedBulletinBoardClientTest {
-
-    private static final int THREAD_NUM = 3;
-
-    private static final String LOCAL_DB_NAME = "localDB";
-    private static final String REMOTE_DB_NAME = "remoteDB";
-    private static final String QUEUE_DB_NAME = "queueDB";
-
-    private static final int SUBSRCIPTION_DELAY = 500;
-    private static final int SYNC_DELAY = 500;
-
-    // Testers
-    private CachedBulletinBoardClient cachedClient;
-    private GenericBulletinBoardClientTester clientTest;
-    private GenericSubscriptionClientTester subscriptionTester;
-
-    public CachedBulletinBoardClientTest() throws CommunicationException {
-
-        DeletableBulletinBoardServer localServer = new BulletinBoardSQLServer(new H2QueryProvider(LOCAL_DB_NAME));
-        localServer.init();
-        LocalBulletinBoardClient localClient = new LocalBulletinBoardClient(localServer, THREAD_NUM, SUBSRCIPTION_DELAY);
-
-        DeletableBulletinBoardServer remoteServer = new BulletinBoardSQLServer(new H2QueryProvider(REMOTE_DB_NAME));
-        remoteServer.init();
-        LocalBulletinBoardClient remoteClient = new LocalBulletinBoardClient(remoteServer, THREAD_NUM, SUBSRCIPTION_DELAY);
-
-        DeletableBulletinBoardServer queueServer = new BulletinBoardSQLServer(new H2QueryProvider(QUEUE_DB_NAME));
-        queueServer.init();
-        LocalBulletinBoardClient queueClient = new LocalBulletinBoardClient(queueServer, THREAD_NUM, SUBSRCIPTION_DELAY);
-
-        List<SubscriptionBulletinBoardClient> clientList = new LinkedList<>();
-        clientList.add(remoteClient);
-
-        BulletinBoardSubscriber subscriber = new ThreadedBulletinBoardSubscriber(clientList, localClient);
-
-        cachedClient = new CachedBulletinBoardClient(localClient, remoteClient, subscriber, queueClient, SYNC_DELAY, SYNC_DELAY);
-        subscriptionTester = new GenericSubscriptionClientTester(cachedClient);
-        clientTest = new GenericBulletinBoardClientTester(cachedClient, 87351);
-
-    }
-
-    // Test methods
-
-    /**
-     * Takes care of initializing the client and the test resources
-     */
-    @Before
-    public void init(){
-
-        clientTest.init();
-
-    }
-
-    /**
-     * Closes the client and makes sure the test fails when an exception occurred in a separate thread
-     */
-
-    @After
-    public void close() {
-
-        cachedClient.close();
-        clientTest.close();
-
-    }
-
-    @Test
-    public void testPost() {
-
-        clientTest.testPost();
-
-    }
-
-    @Test
-    public void testBatchPost() throws CommunicationException, SignatureException, InterruptedException {
-
-        clientTest.testBatchPost();
-    }
-
-    @Test
-    public void testCompleteBatchPost() throws CommunicationException, SignatureException, InterruptedException {
-
-        clientTest.testCompleteBatchPost();
-
-    }
-
-    @Test
-    public void testSubscription() throws SignatureException, CommunicationException {
-
-//        subscriptionTester.init();
-//        subscriptionTester.subscriptionTest();
-//        subscriptionTester.close();
-
-    }
-
-}

bulletin-board-client/src/test/java/meerkat/bulletinboard/GenericBulletinBoardClientTester.java

@@ -5,13 +5,10 @@ import com.google.protobuf.ByteString;
 import com.google.protobuf.Timestamp;
 import meerkat.comm.CommunicationException;
 import meerkat.crypto.concrete.ECDSASignature;
-import meerkat.crypto.concrete.SHA256Digest;
+import meerkat.protobuf.BulletinBoardAPI.*;
-import meerkat.protobuf.BulletinBoardApi.*;
 import meerkat.protobuf.Crypto;
 import meerkat.util.BulletinBoardMessageComparator;
 import meerkat.util.BulletinBoardMessageGenerator;
-import meerkat.util.BulletinBoardUtils;
-import meerkat.bulletinboard.AsyncBulletinBoardClient.BatchIdentifier;
 
 import java.io.IOException;
 import java.io.InputStream;
@@ -31,7 +28,7 @@ public class GenericBulletinBoardClientTester {
 
     // Signature resources
 
-    private BulletinBoardSignature signers[];
+    private GenericBatchDigitalSignature signers[];
     private ByteString[] signerIDs;
 
     private static String KEYFILE_EXAMPLE = "/certs/enduser-certs/user1-key-with-password-secret.p12";
@@ -48,29 +45,28 @@ public class GenericBulletinBoardClientTester {
     private AsyncBulletinBoardClient bulletinBoardClient;
 
     private PostCallback postCallback;
+    private PostCallback failPostCallback = new PostCallback(true,false);
 
     private RedundancyCallback redundancyCallback;
     private ReadCallback readCallback;
+    private ReadBatchCallback readBatchCallback;
 
     // Sync and misc
 
     private Semaphore jobSemaphore;
     private Vector<Throwable> thrown;
     private Random random;
-    private BulletinBoardMessageGenerator generator;
-
-    private BulletinBoardDigest digest;
 
     // Constructor
 
-    public GenericBulletinBoardClientTester(AsyncBulletinBoardClient bulletinBoardClient, int seed){
+    public GenericBulletinBoardClientTester(AsyncBulletinBoardClient bulletinBoardClient){
 
         this.bulletinBoardClient = bulletinBoardClient;
 
-        signers = new GenericBulletinBoardSignature[2];
+        signers = new GenericBatchDigitalSignature[2];
         signerIDs = new ByteString[signers.length];
-        signers[0] = new GenericBulletinBoardSignature(new ECDSASignature());
+        signers[0] = new GenericBatchDigitalSignature(new ECDSASignature());
-        signers[1] = new GenericBulletinBoardSignature(new ECDSASignature());
+        signers[1] = new GenericBatchDigitalSignature(new ECDSASignature());
 
         InputStream keyStream = getClass().getResourceAsStream(KEYFILE_EXAMPLE);
         char[] password = KEYFILE_PASSWORD1.toCharArray();
@@ -112,10 +108,6 @@ public class GenericBulletinBoardClientTester {
             fail("Couldn't find signing key " + e.getMessage());
         }
 
-        this.random = new Random(seed);
-        this.generator = new BulletinBoardMessageGenerator(random);
-        this.digest = new GenericBulletinBoardDigest(new SHA256Digest());
-
     }
 
     // Callback definitions
@@ -146,21 +138,16 @@ public class GenericBulletinBoardClientTester {
 
         @Override
         public void onSuccess(Boolean msg) {
-
             System.err.println("Post operation completed");
-
+            jobSemaphore.release();
+            //TODO: Change Assert mechanism to exception one
             if (isAssert) {
-                if (assertValue && !msg) {
+                if (assertValue) {
-                    genericHandleFailure(new AssertionError("Post operation failed"));
+                    assertThat("Post operation failed", msg, is(Boolean.TRUE));
-                } else if (!assertValue && msg){
-                    genericHandleFailure(new AssertionError("Post operation succeeded unexpectedly"));
                 } else {
-                    jobSemaphore.release();
+                    assertThat("Post operation succeeded unexpectedly", msg, is(Boolean.FALSE));
                 }
-            } else {
-                jobSemaphore.release();
             }
-
         }
 
         @Override
@@ -223,24 +210,21 @@ public class GenericBulletinBoardClientTester {
         }
     }
 
-    private class ReadBatchCallback implements FutureCallback<BulletinBoardMessage>{
+    private class ReadBatchCallback implements FutureCallback<CompleteBatch> {
 
-        private BulletinBoardMessage expectedMsg;
+        private CompleteBatch expectedBatch;
 
-        public ReadBatchCallback(BulletinBoardMessage expectedMsg) {
+        public ReadBatchCallback(CompleteBatch expectedBatch) {
-            this.expectedMsg = expectedMsg;
+            this.expectedBatch = expectedBatch;
         }
 
         @Override
-        public void onSuccess(BulletinBoardMessage msg) {
+        public void onSuccess(CompleteBatch batch) {
 
-            BulletinBoardMessageComparator msgComparator = new BulletinBoardMessageComparator();
+            System.err.println(batch);
-
-            if (msgComparator.compare(msg, expectedMsg) != 0) {
-                genericHandleFailure(new AssertionError("Batch read returned different message.\nExpected:" + expectedMsg + "\nRecieved:" + msg + "\n"));
-            } else {
             jobSemaphore.release();
-            }
+
+            assertThat("Batch returned is incorrect", batch, is(equalTo(expectedBatch)));
 
         }
 
@@ -250,6 +234,59 @@ public class GenericBulletinBoardClientTester {
         }
     }
 
+    // Randomness generators
+
+    private byte randomByte(){
+        return (byte) random.nextInt();
+    }
+
+    private byte[] randomByteArray(int length) {
+
+        byte[] randomBytes = new byte[length];
+
+        for (int i = 0; i < length ; i++){
+            randomBytes[i] = randomByte();
+        }
+
+        return randomBytes;
+
+    }
+
+    private CompleteBatch createRandomBatch(int signer, int batchId, int length) throws SignatureException {
+
+        CompleteBatch completeBatch = new CompleteBatch();
+
+        // Create data
+
+        completeBatch.setBeginBatchMessage(BeginBatchMessage.newBuilder()
+                .setSignerId(signerIDs[signer])
+                .setBatchId(batchId)
+                .addTag("Test")
+                .build());
+
+        for (int i = 0 ; i < length ; i++){
+
+            BatchData batchData = BatchData.newBuilder()
+                    .setData(ByteString.copyFrom(randomByteArray(i)))
+                    .build();
+
+            completeBatch.appendBatchData(batchData);
+
+        }
+
+        completeBatch.setTimestamp(Timestamp.newBuilder()
+                .setSeconds(Math.abs(90))
+                .setNanos(50)
+                .build());
+
+        signers[signer].updateContent(completeBatch);
+
+        completeBatch.setSignature(signers[signer].sign());
+
+        return completeBatch;
+
+    }
+
     // Test methods
 
     /**
@@ -274,13 +311,7 @@ public class GenericBulletinBoardClientTester {
     public void close() {
 
         if (thrown.size() > 0) {
-
-            for (Throwable t : thrown){
-                System.err.println(t.getMessage());
-            }
-
             assert false;
-
         }
 
     }
@@ -288,7 +319,7 @@ public class GenericBulletinBoardClientTester {
     /**
      * Tests the standard post, redundancy and read methods
      */
-    public void testPost() {
+    public void postTest() {
 
         byte[] b1 = {(byte) 1, (byte) 2, (byte) 3, (byte) 4};
         byte[] b2 = {(byte) 11, (byte) 12, (byte) 13, (byte) 14};
@@ -364,69 +395,59 @@ public class GenericBulletinBoardClientTester {
 
     /**
      * Tests posting a batch by parts
+     * Also tests not being able to post to a closed batch
      * @throws CommunicationException, SignatureException, InterruptedException
      */
     public void testBatchPost() throws CommunicationException, SignatureException, InterruptedException {
 
+        final int SIGNER = 1;
+        final int BATCH_ID = 100;
         final int BATCH_LENGTH = 100;
-        final int CHUNK_SIZE = 10;
-        final int TAG_NUM = 10;
 
-        final Timestamp timestamp = Timestamp.newBuilder()
+        CompleteBatch completeBatch = createRandomBatch(SIGNER, BATCH_ID, BATCH_LENGTH);
-                .setSeconds(141515)
-                .setNanos(859018)
-                .build();
-
-        final BulletinBoardMessage msg = generator.generateRandomMessage(signers, timestamp, BATCH_LENGTH, TAG_NUM);
 
         // Begin batch
 
-        bulletinBoardClient.beginBatch(msg.getMsg().getTagList(), new FutureCallback<BatchIdentifier>() {
+        bulletinBoardClient.beginBatch(completeBatch.getBeginBatchMessage(), postCallback);
-
-            @Override
-            public void onSuccess(final BatchIdentifier identifier) {
-
-                bulletinBoardClient.postBatchData(identifier, BulletinBoardUtils.breakToBatch(msg, CHUNK_SIZE), new FutureCallback<Boolean>() {
-
-                    @Override
-                    public void onSuccess(Boolean result) {
-
-                        bulletinBoardClient.closeBatch(identifier, msg.getMsg().getTimestamp(), msg.getSigList(), new FutureCallback<Boolean>() {
-                            @Override
-                            public void onSuccess(Boolean result) {
-                                jobSemaphore.release();
-                            }
-
-                            @Override
-                            public void onFailure(Throwable t) {
-                                genericHandleFailure(t);
-                            }
-                        });
-
-                    }
-
-                    @Override
-                    public void onFailure(Throwable t) {
-                        genericHandleFailure(t);
-                    }
-
-                });
-
-            }
-
-            @Override
-            public void onFailure(Throwable t) {
-                genericHandleFailure(t);
-            }
-
-        });
 
         jobSemaphore.acquire();
 
-        digest.reset();
+        // Post data
-        digest.update(msg);
 
-        bulletinBoardClient.readMessage(digest.digestAsMessageID(), new ReadBatchCallback(msg));
+        bulletinBoardClient.postBatchData(signerIDs[SIGNER], BATCH_ID, completeBatch.getBatchDataList(), postCallback);
+
+        jobSemaphore.acquire();
+
+        // Close batch
+
+        CloseBatchMessage closeBatchMessage = completeBatch.getCloseBatchMessage();
+
+        bulletinBoardClient.closeBatch(closeBatchMessage, postCallback);
+
+        jobSemaphore.acquire();
+
+        // Attempt to open batch again
+
+        bulletinBoardClient.beginBatch(completeBatch.getBeginBatchMessage(), failPostCallback);
+
+        // Attempt to add batch data
+
+        bulletinBoardClient.postBatchData(signerIDs[SIGNER], BATCH_ID, completeBatch.getBatchDataList(), failPostCallback);
+
+        jobSemaphore.acquire(2);
+
+        // Read batch data
+
+        BatchSpecificationMessage batchSpecificationMessage =
+                BatchSpecificationMessage.newBuilder()
+                        .setSignerId(signerIDs[SIGNER])
+                        .setBatchId(BATCH_ID)
+                        .setStartPosition(0)
+                        .build();
+
+        readBatchCallback = new ReadBatchCallback(completeBatch);
+
+        bulletinBoardClient.readBatch(batchSpecificationMessage, readBatchCallback);
 
         jobSemaphore.acquire();
 
@@ -434,61 +455,62 @@ public class GenericBulletinBoardClientTester {
 
     /**
      * Posts a complete batch message
-     * Checks reading of the message in two parts
+     * Checks reading of the message
      * @throws CommunicationException, SignatureException, InterruptedException
      */
     public void testCompleteBatchPost() throws CommunicationException, SignatureException, InterruptedException {
 
-        final int BATCH_LENGTH = 100;
+        final int SIGNER = 0;
-        final int CHUNK_SIZE = 99;
+        final int BATCH_ID = 101;
-        final int TAG_NUM = 8;
+        final int BATCH_LENGTH = 50;
-
-        final Timestamp timestamp = Timestamp.newBuilder()
-                .setSeconds(7776151)
-                .setNanos(252616)
-                .build();
-
-        final BulletinBoardMessage msg = generator.generateRandomMessage(signers, timestamp, BATCH_LENGTH, TAG_NUM);
 
         // Post batch
 
-        MessageID msgID = bulletinBoardClient.postAsBatch(msg, CHUNK_SIZE, postCallback);
+        CompleteBatch completeBatch = createRandomBatch(SIGNER, BATCH_ID, BATCH_LENGTH);
+
+        bulletinBoardClient.postBatch(completeBatch,postCallback);
 
         jobSemaphore.acquire();
 
         // Read batch
 
-        MessageFilterList filterList = MessageFilterList.newBuilder()
+        BatchSpecificationMessage batchSpecificationMessage =
-                .addFilter(MessageFilter.newBuilder()
+                BatchSpecificationMessage.newBuilder()
-                        .setType(FilterType.MSG_ID)
+                        .setSignerId(signerIDs[SIGNER])
-                        .setId(msgID.getID())
+                        .setBatchId(BATCH_ID)
+                        .setStartPosition(0)
+                        .build();
+
+        readBatchCallback = new ReadBatchCallback(completeBatch);
+
+        bulletinBoardClient.readBatch(batchSpecificationMessage, readBatchCallback);
+
+        jobSemaphore.acquire();
+
+    }
+
+    /**
+     * Tests that an unopened batch cannot be closed
+     * @throws CommunicationException, InterruptedException
+     */
+    public void testInvalidBatchClose() throws CommunicationException, InterruptedException {
+
+        final int NON_EXISTENT_BATCH_ID = 999;
+
+        CloseBatchMessage closeBatchMessage =
+                CloseBatchMessage.newBuilder()
+                        .setBatchId(NON_EXISTENT_BATCH_ID)
+                        .setBatchLength(1)
+                        .setSig(Crypto.Signature.getDefaultInstance())
+                        .setTimestamp(Timestamp.newBuilder()
+                                .setSeconds(9)
+                                .setNanos(12)
                                 .build())
                         .build();
 
-        bulletinBoardClient.readMessages(filterList, new FutureCallback<List<BulletinBoardMessage>>() {
+        // Try to close the (unopened) batch;
 
-            @Override
+        bulletinBoardClient.closeBatch(closeBatchMessage, failPostCallback);
-            public void onSuccess(List<BulletinBoardMessage> msgList) {
-
-                if (msgList.size() != 1) {
-
-                    genericHandleFailure(new AssertionError("Wrong number of stubs returned. Expected: 1; Found: " + msgList.size()));
-
-                } else {
-
-                    BulletinBoardMessage retrievedMsg = msgList.get(0);
-                    bulletinBoardClient.readBatchData(retrievedMsg, new ReadBatchCallback(msg));
-
-                }
-
-            }
-
-            @Override
-            public void onFailure(Throwable t) {
-                genericHandleFailure(t);
-            }
-
-        });
 
         jobSemaphore.acquire();
 

bulletin-board-client/src/test/java/meerkat/bulletinboard/GenericSubscriptionClientTester.java

@@ -5,7 +5,7 @@ import com.google.protobuf.ByteString;
 import com.google.protobuf.Timestamp;
 import meerkat.comm.CommunicationException;
 import meerkat.crypto.concrete.ECDSASignature;
-import meerkat.protobuf.BulletinBoardApi.*;
+import meerkat.protobuf.BulletinBoardAPI.*;
 import meerkat.util.BulletinBoardMessageComparator;
 import meerkat.util.BulletinBoardMessageGenerator;
 
@@ -16,6 +16,9 @@ import java.security.cert.CertificateException;
 import java.util.*;
 import java.util.concurrent.Semaphore;
 
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.startsWith;
+import static org.junit.Assert.assertThat;
 import static org.junit.Assert.fail;
 
 /**
@@ -23,7 +26,7 @@ import static org.junit.Assert.fail;
  */
 public class GenericSubscriptionClientTester {
 
-    private BulletinBoardSignature signers[];
+    private GenericBatchDigitalSignature signers[];
     private ByteString[] signerIDs;
 
     private static String KEYFILE_EXAMPLE = "/certs/enduser-certs/user1-key-with-password-secret.p12";
@@ -35,7 +38,7 @@ public class GenericSubscriptionClientTester {
     private static String CERT1_PEM_EXAMPLE = "/certs/enduser-certs/user1.crt";
     private static String CERT3_PEM_EXAMPLE = "/certs/enduser-certs/user3.crt";
 
-    private SubscriptionBulletinBoardClient bulletinBoardClient;
+    private SubscriptionAsyncBulletinBoardClient bulletinBoardClient;
 
     private Random random;
     private BulletinBoardMessageGenerator generator;
@@ -43,14 +46,14 @@ public class GenericSubscriptionClientTester {
     private Semaphore jobSemaphore;
     private Vector<Throwable> thrown;
 
-    public GenericSubscriptionClientTester(SubscriptionBulletinBoardClient bulletinBoardClient){
+    public GenericSubscriptionClientTester(SubscriptionAsyncBulletinBoardClient bulletinBoardClient){
 
         this.bulletinBoardClient = bulletinBoardClient;
 
-        signers = new BulletinBoardSignature[2];
+        signers = new GenericBatchDigitalSignature[2];
         signerIDs = new ByteString[signers.length];
-        signers[0] = new GenericBulletinBoardSignature(new ECDSASignature());
+        signers[0] = new GenericBatchDigitalSignature(new ECDSASignature());
-        signers[1] = new GenericBulletinBoardSignature(new ECDSASignature());
+        signers[1] = new GenericBatchDigitalSignature(new ECDSASignature());
 
         InputStream keyStream = getClass().getResourceAsStream(KEYFILE_EXAMPLE);
         char[] password = KEYFILE_PASSWORD1.toCharArray();
@@ -178,13 +181,15 @@ public class GenericSubscriptionClientTester {
         public void onFailure(Throwable t) {
             System.err.println(t.getCause() + " " + t.getMessage());
             thrown.add(t);
-            jobSemaphore.release();
+            jobSemaphore.release(expectedMessages.size());
             stage = expectedMessages.size();
         }
     }
 
     public void subscriptionTest() throws SignatureException, CommunicationException {
 
+        final int FIRST_POST_ID = 201;
+        final int SECOND_POST_ID = 202;
         final String COMMON_TAG = "SUBSCRIPTION_TEST";
 
         List<String> tags = new LinkedList<>();
@@ -202,9 +207,9 @@ public class GenericSubscriptionClientTester {
                 .build();
 
         List<List<BulletinBoardMessage>> expectedMessages = new ArrayList<>(3);
-        expectedMessages.add(new LinkedList<>());
+        expectedMessages.add(new LinkedList<BulletinBoardMessage>());
-        expectedMessages.add(new LinkedList<>());
+        expectedMessages.add(new LinkedList<BulletinBoardMessage>());
-        expectedMessages.add(new LinkedList<>());
+        expectedMessages.add(new LinkedList<BulletinBoardMessage>());
         expectedMessages.get(0).add(msg1);
         expectedMessages.get(2).add(msg3);
 

bulletin-board-client/src/test/java/meerkat/bulletinboard/LocalBulletinBoardClientTest.java

@@ -7,6 +7,12 @@ import org.junit.Before;
 import org.junit.Test;
 
 import java.security.SignatureException;
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.List;
+
+import static org.junit.Assert.fail;
 
 /**
  * Created by Arbel Deutsch Peled on 05-Dec-15.
@@ -26,12 +32,28 @@ public class LocalBulletinBoardClientTest {
 
         H2QueryProvider queryProvider = new H2QueryProvider(DB_NAME) ;
 
-        DeletableBulletinBoardServer server = new BulletinBoardSQLServer(queryProvider);
+        try {
-        server.init();
+
+            Connection conn = queryProvider.getDataSource().getConnection();
+            Statement stmt = conn.createStatement();
+
+            List<String> deletionQueries = queryProvider.getSchemaDeletionCommands();
+
+            for (String deletionQuery : deletionQueries) {
+                stmt.execute(deletionQuery);
+            }
+
+        } catch (SQLException e) {
+            System.err.println(e.getMessage());
+            throw new CommunicationException(e.getCause() + " " + e.getMessage());
+        }
+
+        BulletinBoardServer server = new BulletinBoardSQLServer(queryProvider);
+        server.init(DB_NAME);
 
         LocalBulletinBoardClient client = new LocalBulletinBoardClient(server, THREAD_NUM, SUBSRCIPTION_DELAY);
         subscriptionTester = new GenericSubscriptionClientTester(client);
-        clientTest = new GenericBulletinBoardClientTester(client, 98354);
+        clientTest = new GenericBulletinBoardClientTester(client);
 
     }
 
@@ -59,9 +81,9 @@ public class LocalBulletinBoardClientTest {
     }
 
     @Test
-    public void testPost() {
+    public void postTest() {
 
-        clientTest.testPost();
+        clientTest.postTest();
 
     }
 
@@ -79,8 +101,14 @@ public class LocalBulletinBoardClientTest {
     }
 
     @Test
-    public void testSubscription() throws SignatureException, CommunicationException {
+    public void testInvalidBatchClose() throws CommunicationException, InterruptedException {
 
+        clientTest.testInvalidBatchClose();
+
+    }
+
+    @Test
+    public void testSubscription() throws SignatureException, CommunicationException {
         subscriptionTester.init();
         subscriptionTester.subscriptionTest();
         subscriptionTester.close();

bulletin-board-client/src/test/java/meerkat/bulletinboard/SingleServerBulletinBoardClientIntegrationTest.java

@@ -1,104 +0,0 @@
-package meerkat.bulletinboard;
-
-import com.google.common.util.concurrent.ListeningExecutorService;
-import com.google.common.util.concurrent.MoreExecutors;
-import meerkat.comm.CommunicationException;
-import meerkat.protobuf.Voting.BulletinBoardClientParams;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-
-import java.security.SignatureException;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.concurrent.Executors;
-
-/**
- * Created by Arbel Deutsch Peled on 05-Dec-15.
- */
-public class SingleServerBulletinBoardClientIntegrationTest {
-
-    // Server data
-
-    private static final String PROP_GETTY_URL = "gretty.httpBaseURI";
-    private static final String DEFAULT_BASE_URL = "http://localhost:8081";
-    private static final String BASE_URL =  System.getProperty(PROP_GETTY_URL, DEFAULT_BASE_URL);
-
-    private static final int THREAD_NUM = 3;
-    private static final long FAIL_DELAY = 3000;
-    private static final long SUBSCRIPTION_INTERVAL = 500;
-
-    // Testers
-    private GenericBulletinBoardClientTester clientTest;
-    private GenericSubscriptionClientTester subscriptionTester;
-
-    public SingleServerBulletinBoardClientIntegrationTest(){
-
-        SingleServerBulletinBoardClient client = new SingleServerBulletinBoardClient(THREAD_NUM, FAIL_DELAY, SUBSCRIPTION_INTERVAL);
-
-        List<String> testDB = new LinkedList<>();
-        testDB.add(BASE_URL);
-
-        client.init(BulletinBoardClientParams.newBuilder()
-                .addAllBulletinBoardAddress(testDB)
-                .setMinRedundancy((float) 1.0)
-                .build());
-
-        clientTest = new GenericBulletinBoardClientTester(client, 981541);
-        subscriptionTester = new GenericSubscriptionClientTester(client);
-
-    }
-
-    // Test methods
-
-    /**
-     * Takes care of initializing the client and the test resources
-     */
-    @Before
-    public void init(){
-
-        clientTest.init();
-
-    }
-
-    /**
-     * Closes the client and makes sure the test fails when an exception occurred in a separate thread
-     */
-
-    @After
-    public void close() {
-
-        clientTest.close();
-
-    }
-
-    @Test
-    public void testPost() {
-
-        clientTest.testPost();
-
-    }
-
-    @Test
-    public void testBatchPost() throws CommunicationException, SignatureException, InterruptedException {
-
-        clientTest.testBatchPost();
-    }
-
-    @Test
-    public void testCompleteBatchPost() throws CommunicationException, SignatureException, InterruptedException {
-
-        clientTest.testCompleteBatchPost();
-
-    }
-
-    @Test
-    public void testSubscription() throws SignatureException, CommunicationException {
-
-        subscriptionTester.init();
-        subscriptionTester.subscriptionTest();
-        subscriptionTester.close();
-
-    }
-
-}

bulletin-board-client/src/test/java/meerkat/bulletinboard/ThreadedBulletinBoardClientIntegrationTest.java

@@ -28,7 +28,7 @@ public class ThreadedBulletinBoardClientIntegrationTest {
 
     public ThreadedBulletinBoardClientIntegrationTest(){
 
-        ThreadedBulletinBoardClient client = new ThreadedBulletinBoardClient(3,0,500);
+        ThreadedBulletinBoardClient client = new ThreadedBulletinBoardClient();
 
         List<String> testDB = new LinkedList<>();
         testDB.add(BASE_URL);
@@ -38,7 +38,7 @@ public class ThreadedBulletinBoardClientIntegrationTest {
                 .setMinRedundancy((float) 1.0)
                 .build());
 
-        clientTest = new GenericBulletinBoardClientTester(client, 52351);
+        clientTest = new GenericBulletinBoardClientTester(client);
 
     }
 
@@ -66,9 +66,9 @@ public class ThreadedBulletinBoardClientIntegrationTest {
     }
 
     @Test
-    public void testPost() {
+    public void postTest() {
 
-        clientTest.testPost();
+        clientTest.postTest();
 
     }
 
@@ -76,7 +76,6 @@ public class ThreadedBulletinBoardClientIntegrationTest {
     public void testBatchPost() throws CommunicationException, SignatureException, InterruptedException {
 
         clientTest.testBatchPost();
-
     }
 
     @Test
@@ -86,4 +85,11 @@ public class ThreadedBulletinBoardClientIntegrationTest {
 
     }
 
+    @Test
+    public void testInvalidBatchClose() throws CommunicationException, InterruptedException {
+
+        clientTest.testInvalidBatchClose();
+
+    }
+
 }

bulletin-board-server-frontend/.angular-cli.json

@@ -1,57 +0,0 @@
-{
-  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
-  "project": {
-    "name": "bulletin-board-server-frontend"
-  },
-  "apps": [
-    {
-      "root": "src",
-      "outDir": "dist",
-      "assets": [
-        "assets",
-        "favicon.ico"
-      ],
-      "index": "index.html",
-      "main": "main.ts",
-      "polyfills": "polyfills.ts",
-      "test": "test.ts",
-      "tsconfig": "tsconfig.app.json",
-      "testTsconfig": "tsconfig.spec.json",
-      "prefix": "app",
-      "styles": [
-        "styles.css"
-      ],
-      "scripts": [],
-      "environmentSource": "environments/environment.ts",
-      "environments": {
-        "dev": "environments/environment.ts",
-        "prod": "environments/environment.prod.ts"
-      }
-    }
-  ],
-  "e2e": {
-    "protractor": {
-      "config": "./protractor.conf.js"
-    }
-  },
-  "lint": [
-    {
-      "project": "src/tsconfig.app.json"
-    },
-    {
-      "project": "src/tsconfig.spec.json"
-    },
-    {
-      "project": "e2e/tsconfig.e2e.json"
-    }
-  ],
-  "test": {
-    "karma": {
-      "config": "./karma.conf.js"
-    }
-  },
-  "defaults": {
-    "styleExt": "css",
-    "component": {}
-  }
-}

bulletin-board-server-frontend/.editorconfig

@@ -1,13 +0,0 @@
-# Editor configuration, see http://editorconfig.org
-root = true
-
-[*]
-charset = utf-8
-indent_style = space
-indent_size = 2
-insert_final_newline = true
-trim_trailing_whitespace = true
-
-[*.md]
-max_line_length = off
-trim_trailing_whitespace = false

bulletin-board-server-frontend/.gitignore

@@ -1,42 +0,0 @@
-# See http://help.github.com/ignore-files/ for more about ignoring files.
-
-# compiled output
-/dist
-/tmp
-/out-tsc
-
-# dependencies
-/node_modules
-
-# IDEs and editors
-/.idea
-.project
-.classpath
-.c9/
-*.launch
-.settings/
-*.sublime-workspace
-
-# IDE - VSCode
-.vscode/*
-!.vscode/settings.json
-!.vscode/tasks.json
-!.vscode/launch.json
-!.vscode/extensions.json
-
-# misc
-/.sass-cache
-/connect.lock
-/coverage
-/libpeerconnection.log
-npm-debug.log
-testem.log
-/typings
-
-# e2e
-/e2e/*.js
-/e2e/*.map
-
-# System Files
-.DS_Store
-Thumbs.db

bulletin-board-server-frontend/README.md

@@ -1,28 +0,0 @@
-# BulletinBoardServerFrontend
-
-This project was generated with [Angular CLI](https://github.com/angular/angular-cli) version 1.2.0.
-
-## Development server
-
-Run `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.
-
-## Code scaffolding
-
-Run `ng generate component component-name` to generate a new component. You can also use `ng generate directive|pipe|service|class|module`.
-
-## Build
-
-Run `ng build` to build the project. The build artifacts will be stored in the `dist/` directory. Use the `-prod` flag for a production build.
-
-## Running unit tests
-
-Run `ng test` to execute the unit tests via [Karma](https://karma-runner.github.io).
-
-## Running end-to-end tests
-
-Run `ng e2e` to execute the end-to-end tests via [Protractor](http://www.protractortest.org/).
-Before running the tests make sure you are serving the app via `ng serve`.
-
-## Further help
-
-To get more help on the Angular CLI use `ng help` or go check out the [Angular CLI README](https://github.com/angular/angular-cli/blob/master/README.md).

bulletin-board-server-frontend/build.gradle

@@ -1,60 +0,0 @@
-plugins {
-  id "com.moowork.node" version "1.2.0"
-}
-
-node {
-  download = true;
-}
-
-ext {
-  bundlejs = "src/app/bundle.js"
-  bundlets = "src/app/bundle.d.ts"
-}
-
-//task installAngularCli(type: NpmTask) {
-//  args = ['install', '@angular/cli']
-//}
-//npm_install.dependsOn(installAngularCli);
-
-task printProtos {
-  doLast {
-    println getProtoFiles().join(" ")
-  }
-}
-printProtos.description = "List all the .proto files we can find."
-
-
-def getProtoFiles() {
-  def protoFiles = []
-
-  rootProject.subprojects { proj ->
-    if (proj.hasProperty('sourceSets') && proj.sourceSets.hasProperty('main') &&
-      proj.sourceSets.main.hasProperty('proto')) {
-      protoFiles = protoFiles + proj.sourceSets.main.proto.getFiles();
-    }
-  }
-  return protoFiles;
-}
-
-
-task generateProtobufBundle(type: NpmTask) {
-  doFirst {
-    // We need do this in doFirst since getProtoFiles won't find all subprojects
-    // until after configuration is complete
-    def protoFiles = getProtoFiles()
-    generateProtobufBundle.args = ['run', 'protoc', '--' ] + protoFiles;
-  }
-
-  dependsOn npm_install
-}
-generateProtobufBundle.description = "Generate the bundle.js/bundle.d.ts files containing compiled protobufs"
-
-
-npm_run_build.dependsOn(npm_install)
-npm_run_build.dependsOn(generateProtobufBundle)
-npm_start.dependsOn(generateProtobufBundle)
-
-
-// It would be nice if this worked, but it seems to get stuck:
-//npm_start.dependsOn(project(':bulletin-board-server').jettyStart);
-

bulletin-board-server-frontend/e2e/app.e2e-spec.ts

@@ -1,14 +0,0 @@
-import { BulletinBoardServerFrontendPage } from './app.po';
-
-describe('bulletin-board-server-frontend App', () => {
-  let page: BulletinBoardServerFrontendPage;
-
-  beforeEach(() => {
-    page = new BulletinBoardServerFrontendPage();
-  });
-
-  it('should display welcome message', () => {
-    page.navigateTo();
-    expect(page.getParagraphText()).toEqual('Welcome to app!!');
-  });
-});

bulletin-board-server-frontend/e2e/app.po.ts

@@ -1,11 +0,0 @@
-import { browser, by, element } from 'protractor';
-
-export class BulletinBoardServerFrontendPage {
-  navigateTo() {
-    return browser.get('/');
-  }
-
-  getParagraphText() {
-    return element(by.css('app-root h1')).getText();
-  }
-}

bulletin-board-server-frontend/e2e/tsconfig.e2e.json

@@ -1,13 +0,0 @@
-{
-  "extends": "../tsconfig.json",
-  "compilerOptions": {
-    "outDir": "../out-tsc/e2e",
-    "module": "commonjs",
-    "target": "es5",
-    "types": [
-      "jasmine",
-      "jasminewd2",
-      "node"
-    ]
-  }
-}

bulletin-board-server-frontend/generate-protobuf.js

@@ -1,32 +0,0 @@
-#!/usr/bin/env node
-const { execFileSync } = require('child_process');
-const  path  = require('path');
-
-const isWin = (process.platform === 'win32');
-
-const bundlejs = 'src/app/bundle.js'
-const bundlets = 'src/app/bundle.d.ts'
-
-const npm = isWin ? 'npm.cmd' : 'npm';
-
-
-var args = process.argv.slice(2).map(function(x) {
-  return path.normalize(x);
-});
-
-
-var pbjs_args = [
-  '-t', 'static-module', '-w', 'commonjs', '-o', bundlejs
-].concat(args);
-
-console.log("Running pbjs " + pbjs_args.join(" "));
-var out = execFileSync(npm, ['run', 'pbjs', '--'].concat(pbjs_args));
-console.log("" + out);
-
-var pbts_args = [
-  '-o', bundlets, bundlejs
-];
-
-console.log("Running pbts " + pbts_args.join(" "));
-out = execFileSync(npm, ['run', 'pbts', '--'].concat(pbts_args));
-console.log("" + out);

bulletin-board-server-frontend/gradlew

@@ -1 +0,0 @@
-../gradlew

bulletin-board-server-frontend/karma.conf.js

@@ -1,33 +0,0 @@
-// Karma configuration file, see link for more information
-// https://karma-runner.github.io/0.13/config/configuration-file.html
-
-module.exports = function (config) {
-  config.set({
-    basePath: '',
-    frameworks: ['jasmine', '@angular/cli'],
-    plugins: [
-      require('karma-jasmine'),
-      require('karma-chrome-launcher'),
-      require('karma-jasmine-html-reporter'),
-      require('karma-coverage-istanbul-reporter'),
-      require('@angular/cli/plugins/karma')
-    ],
-    client:{
-      clearContext: false // leave Jasmine Spec Runner output visible in browser
-    },
-    coverageIstanbulReporter: {
-      reports: [ 'html', 'lcovonly' ],
-      fixWebpackSourcePaths: true
-    },
-    angularCli: {
-      environment: 'dev'
-    },
-    reporters: ['progress', 'kjhtml'],
-    port: 9876,
-    colors: true,
-    logLevel: config.LOG_INFO,
-    autoWatch: true,
-    browsers: ['Chrome'],
-    singleRun: false
-  });
-};

bulletin-board-server-frontend/package.json

@@ -1,53 +0,0 @@
-{
-  "name": "bulletin-board-server-frontend",
-  "version": "0.0.0",
-  "license": "MIT",
-  "scripts": {
-    "ng": "ng",
-    "start": "ng serve --proxy-config proxy.conf.json",
-    "build": "ng build",
-    "test": "ng test",
-    "lint": "ng e2e",
-    "pbts": "pbts",
-    "pbjs": "pbjs",
-    "protoc" : "node ./generate-protobuf.js"
-  },
-  "private": true,
-  "dependencies": {
-    "@angular/animations": "^4.0.0",
-    "@angular/common": "^4.0.0",
-    "@angular/compiler": "^4.0.0",
-    "@angular/core": "^4.0.0",
-    "@angular/forms": "^4.0.0",
-    "@angular/http": "^4.0.0",
-    "@angular/platform-browser": "^4.0.0",
-    "@angular/platform-browser-dynamic": "^4.0.0",
-    "@angular/router": "^4.0.0",
-    "@types/long": "^3.0.31",
-    "core-js": "^2.4.1",
-    "protobufjs": "^6.8.0",
-    "rxjs": "^5.1.0",
-    "zone.js": "^0.8.4"
-  },
-  "devDependencies": {
-    "@angular/cli": "^1.2.0",
-    "@angular/compiler-cli": "^4.0.0",
-    "@angular/language-service": "^4.0.0",
-    "@types/jasmine": "~2.5.53",
-    "@types/jasminewd2": "~2.0.2",
-    "@types/node": "~6.0.60",
-    "codelyzer": "~3.0.1",
-    "jasmine-core": "~2.6.2",
-    "jasmine-spec-reporter": "~4.1.0",
-    "karma": "~1.7.0",
-    "karma-chrome-launcher": "~2.1.1",
-    "karma-cli": "~1.0.1",
-    "karma-coverage-istanbul-reporter": "^1.2.1",
-    "karma-jasmine": "~1.1.0",
-    "karma-jasmine-html-reporter": "^0.2.2",
-    "protractor": "~5.1.2",
-    "ts-node": "~3.0.4",
-    "tslint": "~5.3.2",
-    "typescript": "~2.3.3"
-  }
-}

bulletin-board-server-frontend/protractor.conf.js

@@ -1,28 +0,0 @@
-// Protractor configuration file, see link for more information
-// https://github.com/angular/protractor/blob/master/lib/config.ts
-
-const { SpecReporter } = require('jasmine-spec-reporter');
-
-exports.config = {
-  allScriptsTimeout: 11000,
-  specs: [
-    './e2e/**/*.e2e-spec.ts'
-  ],
-  capabilities: {
-    'browserName': 'chrome'
-  },
-  directConnect: true,
-  baseUrl: 'http://localhost:4200/',
-  framework: 'jasmine',
-  jasmineNodeOpts: {
-    showColors: true,
-    defaultTimeoutInterval: 30000,
-    print: function() {}
-  },
-  onPrepare() {
-    require('ts-node').register({
-      project: 'e2e/tsconfig.e2e.json'
-    });
-    jasmine.getEnv().addReporter(new SpecReporter({ spec: { displayStacktrace: true } }));
-  }
-};

bulletin-board-server-frontend/proxy.conf.json

@@ -1,6 +0,0 @@
-{
-  "/bbserver" : {
-    "target" : "http://localhost:8081/",
-    "secure" : false
-  }
-}

bulletin-board-server-frontend/src/app/app.component.html

@@ -1,12 +0,0 @@
-<!--The content below is only a placeholder and can be replaced.-->
-<div style="text-align:center">
-  <h1>
-    Welcome to {{title}}!!
-  </h1>
-
-  <h3>Current status: {{status}}</h3>
-  <img width="300" src="assets/meerkat-logo.svg">
-  <hr>
-  {{errorMessage}}
-</div>
-

bulletin-board-server-frontend/src/app/app.component.spec.ts

@@ -1,32 +0,0 @@
-import { TestBed, async } from '@angular/core/testing';
-
-import { AppComponent } from './app.component';
-
-describe('AppComponent', () => {
-  beforeEach(async(() => {
-    TestBed.configureTestingModule({
-      declarations: [
-        AppComponent
-      ],
-    }).compileComponents();
-  }));
-
-  it('should create the app', async(() => {
-    const fixture = TestBed.createComponent(AppComponent);
-    const app = fixture.debugElement.componentInstance;
-    expect(app).toBeTruthy();
-  }));
-
-  it(`should have as title 'app'`, async(() => {
-    const fixture = TestBed.createComponent(AppComponent);
-    const app = fixture.debugElement.componentInstance;
-    expect(app.title).toEqual('app');
-  }));
-
-  it('should render title in a h1 tag', async(() => {
-    const fixture = TestBed.createComponent(AppComponent);
-    fixture.detectChanges();
-    const compiled = fixture.debugElement.nativeElement;
-    expect(compiled.querySelector('h1').textContent).toContain('Welcome to app!!');
-  }));
-});