Use the nio network listener.

app/build.gradle

@@ -11,7 +11,7 @@ if (project.hasProperty("project.configs")
 
 android {
     compileSdkVersion 24
-    buildToolsVersion "24.0.1"
+    buildToolsVersion "24.0.2"
 
     defaultConfig {
         applicationId "ch.dissem.apps." + appName.toLowerCase()
@@ -29,12 +29,12 @@ android {
     }
 }
 
-ext.jabitVersion = 'develop-SNAPSHOT'
+ext.jabitVersion = 'feature-nio-SNAPSHOT'
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:24.1.1'
+    compile 'com.android.support:appcompat-v7:24.2.0'
-    compile 'com.android.support:support-v4:24.1.1'
+    compile 'com.android.support:support-v4:24.2.0'
-    compile 'com.android.support:design:24.1.1'
+    compile 'com.android.support:design:24.2.0'
 
     compile "ch.dissem.jabit:jabit-core:$jabitVersion"
     compile "ch.dissem.jabit:jabit-networking:$jabitVersion"

app/src/main/assets/db/migration/V3.3__Create_table_node.sql

@@ -0,0 +1,9 @@
+CREATE TABLE Node (
+  stream   BIGINT     NOT NULL,
+  address  BINARY(32) NOT NULL,
+  port     INT        NOT NULL,
+  services BIGINT     NOT NULL,
+  time     BIGINT     NOT NULL,
+  PRIMARY KEY (stream, address, port)
+);
+CREATE INDEX idx_time on Node(time);

app/src/main/java/ch/dissem/apps/abit/ComposeMessageActivity.java

@@ -27,6 +27,7 @@ public class ComposeMessageActivity extends AppCompatActivity {
     public static final String EXTRA_IDENTITY = "ch.dissem.abit.Message.SENDER";
     public static final String EXTRA_RECIPIENT = "ch.dissem.abit.Message.RECIPIENT";
     public static final String EXTRA_SUBJECT = "ch.dissem.abit.Message.SUBJECT";
+    public static final String EXTRA_CONTENT = "ch.dissem.abit.Message.CONTENT";
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {

app/src/main/java/ch/dissem/apps/abit/ComposeMessageFragment.java

@@ -18,6 +18,7 @@ package ch.dissem.apps.abit;
 
 import android.os.Bundle;
 import android.support.v4.app.Fragment;
+import android.text.Selection;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -34,6 +35,7 @@ import ch.dissem.apps.abit.adapter.ContactAdapter;
 import ch.dissem.apps.abit.service.Singleton;
 import ch.dissem.bitmessage.entity.BitmessageAddress;
 
+import static ch.dissem.apps.abit.ComposeMessageActivity.EXTRA_CONTENT;
 import static ch.dissem.apps.abit.ComposeMessageActivity.EXTRA_IDENTITY;
 import static ch.dissem.apps.abit.ComposeMessageActivity.EXTRA_RECIPIENT;
 import static ch.dissem.apps.abit.ComposeMessageActivity.EXTRA_SUBJECT;
@@ -45,6 +47,7 @@ public class ComposeMessageFragment extends Fragment {
     private BitmessageAddress identity;
     private BitmessageAddress recipient;
     private String subject;
+    private String content;
     private AutoCompleteTextView recipientInput;
     private EditText subjectInput;
     private EditText bodyInput;
@@ -71,6 +74,9 @@ public class ComposeMessageFragment extends Fragment {
             if (getArguments().containsKey(EXTRA_SUBJECT)) {
                 subject = getArguments().getString(EXTRA_SUBJECT);
             }
+            if (getArguments().containsKey(EXTRA_CONTENT)) {
+                content = getArguments().getString(EXTRA_CONTENT);
+            }
         } else {
             throw new RuntimeException("No identity set for ComposeMessageFragment");
         }
@@ -106,6 +112,16 @@ public class ComposeMessageFragment extends Fragment {
         subjectInput = (EditText) rootView.findViewById(R.id.subject);
         subjectInput.setText(subject);
         bodyInput = (EditText) rootView.findViewById(R.id.body);
+        bodyInput.setText(content);
+
+        if (recipient == null) {
+            recipientInput.requestFocus();
+        } else if (subject == null || subject.isEmpty()) {
+            subjectInput.requestFocus();
+        } else {
+            bodyInput.requestFocus();
+            bodyInput.setSelection(0);
+        }
 
         return rootView;
     }

app/src/main/java/ch/dissem/apps/abit/MessageDetailFragment.java

@@ -44,6 +44,7 @@ import ch.dissem.bitmessage.entity.valueobject.Label;
 import ch.dissem.bitmessage.ports.MessageRepository;
 
 import static android.text.util.Linkify.WEB_URLS;
+import static ch.dissem.apps.abit.ComposeMessageActivity.EXTRA_CONTENT;
 import static ch.dissem.apps.abit.ComposeMessageActivity.EXTRA_IDENTITY;
 import static ch.dissem.apps.abit.ComposeMessageActivity.EXTRA_RECIPIENT;
 import static ch.dissem.apps.abit.ComposeMessageActivity.EXTRA_SUBJECT;
@@ -169,6 +170,9 @@ public class MessageDetailFragment extends Fragment {
                     prefix = "RE: ";
                 }
                 replyIntent.putExtra(EXTRA_SUBJECT, prefix + item.getSubject());
+                replyIntent.putExtra(EXTRA_CONTENT,
+                    "\n\n------------------------------------------------------\n"
+                        + item.getText());
                 startActivity(replyIntent);
                 return true;
             case R.id.delete:

app/src/main/java/ch/dissem/apps/abit/repository/AndroidAddressRepository.java

@@ -133,8 +133,7 @@ public class AndroidAddressRepository implements AddressRepository {
             where,
             null, null, null, null
         )) {
-            c.moveToFirst();
+            while (c.moveToNext()) {
-            while (!c.isAfterLast()) {
                 BitmessageAddress address;
 
                 byte[] privateKeyBytes = c.getBlob(c.getColumnIndex(COLUMN_PRIVATE_KEY));
@@ -161,7 +160,6 @@ public class AndroidAddressRepository implements AddressRepository {
                 address.setSubscribed(c.getInt(c.getColumnIndex(COLUMN_SUBSCRIBED)) == 1);
 
                 result.add(address);
-                c.moveToNext();
             }
         } catch (IOException e) {
             LOG.error(e.getMessage(), e);
@@ -184,8 +182,10 @@ public class AndroidAddressRepository implements AddressRepository {
 
     private boolean exists(BitmessageAddress address) {
         SQLiteDatabase db = sql.getReadableDatabase();
-        try (Cursor cursor = db.rawQuery("SELECT COUNT(*) FROM Address WHERE address='" + address
+        try (Cursor cursor = db.rawQuery(
-                .getAddress() + "'", null)) {
+            "SELECT COUNT(*) FROM Address WHERE address=?",
+            new String[]{address.getAddress()}
+        )) {
             cursor.moveToFirst();
             return cursor.getInt(0) > 0;
         }
@@ -210,8 +210,8 @@ public class AndroidAddressRepository implements AddressRepository {
             values.put(COLUMN_CHAN, address.isChan());
             values.put(COLUMN_SUBSCRIBED, address.isSubscribed());
 
-            int update = db.update(TABLE_NAME, values, "address = '" + address.getAddress() +
+            int update = db.update(TABLE_NAME, values, "address=?",
-                    "'", null);
+                new String[]{address.getAddress()});
             if (update < 0) {
                 LOG.error("Could not update address " + address);
             }

app/src/main/java/ch/dissem/apps/abit/repository/AndroidInventory.java

@@ -25,7 +25,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.ByteArrayInputStream;
-import java.io.IOException;
 import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.List;
@@ -42,6 +41,7 @@ import ch.dissem.bitmessage.utils.Encode;
 import static ch.dissem.apps.abit.repository.SqlHelper.join;
 import static ch.dissem.bitmessage.utils.UnixTime.MINUTE;
 import static ch.dissem.bitmessage.utils.UnixTime.now;
+import static java.lang.String.valueOf;
 
 /**
  * {@link Inventory} implementation using the Android SQL API.
@@ -97,12 +97,10 @@ public class AndroidInventory implements Inventory {
                         "stream = " + stream,
                         null, null, null, null
                     )) {
-                        c.moveToFirst();
+                        while (c.moveToNext()) {
-                        while (!c.isAfterLast()) {
                             byte[] blob = c.getBlob(c.getColumnIndex(COLUMN_HASH));
                             long expires = c.getLong(c.getColumnIndex(COLUMN_EXPIRES));
                             result.put(new InventoryVector(blob), expires);
-                            c.moveToNext();
                         }
                     }
                     LOG.info("Stream #" + stream + " inventory size: " + result.size());
@@ -136,8 +134,7 @@ public class AndroidInventory implements Inventory {
             "hash = X'" + vector + "'",
             null, null, null, null
         )) {
-            c.moveToFirst();
+            if (!c.moveToFirst()) {
-            if (c.isAfterLast()) {
                 LOG.info("Object requested that we don't have. IV: " + vector);
                 return null;
             }
@@ -174,13 +171,11 @@ public class AndroidInventory implements Inventory {
             where.toString(),
             null, null, null, null
         )) {
-            c.moveToFirst();
+            while (c.moveToNext()) {
-            while (!c.isAfterLast()) {
                 int objectVersion = c.getInt(c.getColumnIndex(COLUMN_VERSION));
                 byte[] blob = c.getBlob(c.getColumnIndex(COLUMN_DATA));
                 result.add(Factory.getObjectMessage(objectVersion, new ByteArrayInputStream(blob),
                     blob.length));
-                c.moveToNext();
             }
         }
         return result;
@@ -211,8 +206,6 @@ public class AndroidInventory implements Inventory {
             getCache(object.getStream()).put(iv, object.getExpiresTime());
         } catch (SQLiteConstraintException e) {
             LOG.trace(e.getMessage(), e);
-        } catch (IOException e) {
-            LOG.error(e.getMessage(), e);
         }
     }
 
@@ -225,7 +218,7 @@ public class AndroidInventory implements Inventory {
     public void cleanup() {
         long fiveMinutesAgo = now() - 5 * MINUTE;
         SQLiteDatabase db = sql.getWritableDatabase();
-        db.delete(TABLE_NAME, "expires < " + fiveMinutesAgo, null);
+        db.delete(TABLE_NAME, "expires < ?", new String[]{valueOf(fiveMinutesAgo)});
 
         for (Map<InventoryVector, Long> c : cache.values()) {
             Iterator<Map.Entry<InventoryVector, Long>> iterator = c.entrySet().iterator();

app/src/main/java/ch/dissem/apps/abit/repository/AndroidMessageRepository.java

@@ -41,6 +41,8 @@ import ch.dissem.bitmessage.ports.AbstractMessageRepository;
 import ch.dissem.bitmessage.ports.MessageRepository;
 import ch.dissem.bitmessage.utils.Encode;
 
+import static java.lang.String.valueOf;
+
 /**
  * {@link MessageRepository} implementation using the Android SQL API.
  */
@@ -100,10 +102,8 @@ public class AndroidMessageRepository extends AbstractMessageRepository {
             null, null, null,
             LBL_COLUMN_ORDER
         )) {
-            c.moveToFirst();
+            while (c.moveToNext()) {
-            while (!c.isAfterLast()) {
                 result.add(getLabel(c));
-                c.moveToNext();
             }
         }
         return result;
@@ -149,17 +149,25 @@ public class AndroidMessageRepository extends AbstractMessageRepository {
 
     @Override
     public int countUnread(Label label) {
+        String[] args;
         String where;
         if (label != null) {
-            where = "id IN (SELECT message_id FROM Message_Label WHERE label_id=" + label.getId()
+            where = "id IN (SELECT message_id FROM Message_Label WHERE label_id=?) AND ";
-                    + ") AND ";
+            args = new String[]{
+                label.getId().toString(),
+                Label.Type.UNREAD.name()
+            };
         } else {
             where = "";
+            args = new String[]{
+                Label.Type.UNREAD.name()
+            };
         }
         SQLiteDatabase db = sql.getReadableDatabase();
         return (int) DatabaseUtils.queryNumEntries(db, TABLE_NAME,
             where + "id IN (SELECT message_id FROM Message_Label WHERE label_id IN (" +
-                        "SELECT id FROM Label WHERE type = '" + Label.Type.UNREAD.name() + "'))"
+                "SELECT id FROM Label WHERE type=?))",
+            args
         );
     }
 
@@ -191,8 +199,7 @@ public class AndroidMessageRepository extends AbstractMessageRepository {
             null, null, null,
             COLUMN_RECEIVED + " DESC"
         )) {
-            c.moveToFirst();
+            while (c.moveToNext()) {
-            while (!c.isAfterLast()) {
                 byte[] iv = c.getBlob(c.getColumnIndex(COLUMN_IV));
                 byte[] data = c.getBlob(c.getColumnIndex(COLUMN_DATA));
                 Plaintext.Type type = Plaintext.Type.valueOf(c.getString(c.getColumnIndex
@@ -219,7 +226,6 @@ public class AndroidMessageRepository extends AbstractMessageRepository {
                 }
                 builder.labels(findLabels(id));
                 result.add(builder.build());
-                c.moveToNext();
             }
         } catch (IOException e) {
             LOG.error(e.getMessage(), e);
@@ -257,7 +263,7 @@ public class AndroidMessageRepository extends AbstractMessageRepository {
             }
 
             // remove existing labels
-            db.delete(JOIN_TABLE_NAME, "message_id=" + message.getId(), null);
+            db.delete(JOIN_TABLE_NAME, "message_id=?", new String[]{valueOf(message.getId())});
 
             // save labels
             ContentValues values = new ContentValues();
@@ -284,10 +290,14 @@ public class AndroidMessageRepository extends AbstractMessageRepository {
         values.put(COLUMN_SENDER, message.getFrom().getAddress());
         values.put(COLUMN_RECIPIENT, message.getTo() == null ? null : message.getTo().getAddress());
         values.put(COLUMN_DATA, Encode.bytes(message));
+        values.put(COLUMN_ACK_DATA, message.getAckData());
         values.put(COLUMN_SENT, message.getSent());
         values.put(COLUMN_RECEIVED, message.getReceived());
         values.put(COLUMN_STATUS, message.getStatus() == null ? null : message.getStatus().name());
         values.put(COLUMN_INITIAL_HASH, message.getInitialHash());
+        values.put(COLUMN_TTL, message.getTTL());
+        values.put(COLUMN_RETRIES, message.getRetries());
+        values.put(COLUMN_NEXT_TRY, message.getNextTry());
         long id = db.insertOrThrow(TABLE_NAME, null, values);
         message.setId(id);
     }
@@ -300,10 +310,14 @@ public class AndroidMessageRepository extends AbstractMessageRepository {
         values.put(COLUMN_SENDER, message.getFrom().getAddress());
         values.put(COLUMN_RECIPIENT, message.getTo() == null ? null : message.getTo().getAddress());
         values.put(COLUMN_DATA, Encode.bytes(message));
+        values.put(COLUMN_ACK_DATA, message.getAckData());
         values.put(COLUMN_SENT, message.getSent());
         values.put(COLUMN_RECEIVED, message.getReceived());
         values.put(COLUMN_STATUS, message.getStatus() == null ? null : message.getStatus().name());
         values.put(COLUMN_INITIAL_HASH, message.getInitialHash());
+        values.put(COLUMN_TTL, message.getTTL());
+        values.put(COLUMN_RETRIES, message.getRetries());
+        values.put(COLUMN_NEXT_TRY, message.getNextTry());
         db.update(TABLE_NAME, values, "id = " + message.getId(), null);
     }
 

app/src/main/java/ch/dissem/apps/abit/repository/AndroidNodeRegistry.java

@@ -0,0 +1,187 @@
+package ch.dissem.apps.abit.repository;
+
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteConstraintException;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteDoneException;
+import android.database.sqlite.SQLiteStatement;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
+import ch.dissem.bitmessage.exception.ApplicationException;
+import ch.dissem.bitmessage.ports.NodeRegistry;
+import ch.dissem.bitmessage.utils.Collections;
+import ch.dissem.bitmessage.utils.SqlStrings;
+
+import static ch.dissem.bitmessage.ports.NodeRegistryHelper.loadStableNodes;
+import static ch.dissem.bitmessage.utils.Strings.hex;
+import static ch.dissem.bitmessage.utils.UnixTime.DAY;
+import static ch.dissem.bitmessage.utils.UnixTime.MINUTE;
+import static ch.dissem.bitmessage.utils.UnixTime.now;
+import static java.lang.String.valueOf;
+
+/**
+ * @author Christian Basler
+ */
+public class AndroidNodeRegistry implements NodeRegistry {
+    private static final Logger LOG = LoggerFactory.getLogger(AndroidInventory.class);
+
+    private static final String TABLE_NAME = "Node";
+    private static final String COLUMN_STREAM = "stream";
+    private static final String COLUMN_ADDRESS = "address";
+    private static final String COLUMN_PORT = "port";
+    private static final String COLUMN_SERVICES = "services";
+    private static final String COLUMN_TIME = "time";
+
+    private final ThreadLocal<SQLiteStatement> loadExistingStatement = new ThreadLocal<>();
+
+    private final SqlHelper sql;
+    private Map<Long, Set<NetworkAddress>> stableNodes;
+
+    public AndroidNodeRegistry(SqlHelper sql) {
+        this.sql = sql;
+        cleanUp();
+    }
+
+    private void cleanUp() {
+        SQLiteDatabase db = sql.getWritableDatabase();
+        db.delete(TABLE_NAME, "time < ?", new String[]{valueOf(now(-28 * DAY))});
+    }
+
+    private Long loadExistingTime(NetworkAddress node) {
+        SQLiteStatement statement = loadExistingStatement.get();
+        if (statement == null) {
+            statement = sql.getWritableDatabase().compileStatement(
+                "SELECT " + COLUMN_TIME +
+                    " FROM " + TABLE_NAME +
+                    " WHERE stream=? AND address=? AND port=?"
+            );
+            loadExistingStatement.set(statement);
+        }
+        statement.bindLong(1, node.getStream());
+        statement.bindBlob(2, node.getIPv6());
+        statement.bindLong(3, node.getPort());
+        try {
+            return statement.simpleQueryForLong();
+        } catch (SQLiteDoneException e) {
+            return null;
+        }
+    }
+
+    @Override
+    public List<NetworkAddress> getKnownAddresses(int limit, long... streams) {
+        String[] projection = {
+            COLUMN_STREAM,
+            COLUMN_ADDRESS,
+            COLUMN_PORT,
+            COLUMN_SERVICES,
+            COLUMN_TIME
+        };
+
+        List<NetworkAddress> result = new LinkedList<>();
+        SQLiteDatabase db = sql.getReadableDatabase();
+        try (Cursor c = db.query(
+            TABLE_NAME, projection,
+            "stream IN (?)",
+            new String[]{SqlStrings.join(streams).toString()},
+            null, null,
+            "time DESC",
+            valueOf(limit)
+        )) {
+            while (c.moveToNext()) {
+                result.add(
+                    new NetworkAddress.Builder()
+                        .stream(c.getLong(c.getColumnIndex(COLUMN_STREAM)))
+                        .ipv6(c.getBlob(c.getColumnIndex(COLUMN_ADDRESS)))
+                        .port(c.getInt(c.getColumnIndex(COLUMN_PORT)))
+                        .services(c.getLong(c.getColumnIndex(COLUMN_SERVICES)))
+                        .time(c.getLong(c.getColumnIndex(COLUMN_TIME)))
+                        .build()
+                );
+            }
+        } catch (Exception e) {
+            LOG.error(e.getMessage(), e);
+            throw new ApplicationException(e);
+        }
+        if (result.isEmpty()) {
+            synchronized (this) {
+                if (stableNodes == null) {
+                    stableNodes = loadStableNodes();
+                }
+            }
+            for (long stream : streams) {
+                Set<NetworkAddress> nodes = stableNodes.get(stream);
+                if (nodes != null && !nodes.isEmpty()) {
+                    result.add(Collections.selectRandom(nodes));
+                }
+            }
+        }
+        return result;
+    }
+
+    @Override
+    public void offerAddresses(List<NetworkAddress> nodes) {
+        SQLiteDatabase db = sql.getWritableDatabase();
+        db.beginTransaction();
+        try {
+            cleanUp();
+            for (NetworkAddress node : nodes) {
+                if (node.getTime() < now(+5 * MINUTE) && node.getTime() > now(-28 * DAY)) {
+                    synchronized (this) {
+                        Long existing = loadExistingTime(node);
+                        if (existing == null) {
+                            insert(node);
+                        } else if (node.getTime() > existing) {
+                            update(node);
+                        }
+                    }
+                }
+            }
+            db.setTransactionSuccessful();
+        } finally {
+            db.endTransaction();
+        }
+    }
+
+    private void insert(NetworkAddress node) {
+        try {
+            SQLiteDatabase db = sql.getWritableDatabase();
+            // Create a new map of values, where column names are the keys
+            ContentValues values = new ContentValues();
+            values.put(COLUMN_STREAM, node.getStream());
+            values.put(COLUMN_ADDRESS, node.getIPv6());
+            values.put(COLUMN_PORT, node.getPort());
+            values.put(COLUMN_SERVICES, node.getServices());
+            values.put(COLUMN_TIME, node.getTime());
+
+            db.insertOrThrow(TABLE_NAME, null, values);
+        } catch (SQLiteConstraintException e) {
+            LOG.trace(e.getMessage(), e);
+        }
+    }
+
+    private void update(NetworkAddress node) {
+        try {
+            SQLiteDatabase db = sql.getWritableDatabase();
+            // Create a new map of values, where column names are the keys
+            ContentValues values = new ContentValues();
+            values.put(COLUMN_SERVICES, node.getServices());
+            values.put(COLUMN_TIME, node.getTime());
+
+            db.update(TABLE_NAME, values,
+                "stream=" + node.getStream() + " AND address=X'" + hex(node.getIPv6()) + "' AND " +
+                    "port=" + node.getPort(),
+                null);
+        } catch (SQLiteConstraintException e) {
+            LOG.trace(e.getMessage(), e);
+        }
+    }
+}

app/src/main/java/ch/dissem/apps/abit/repository/AndroidProofOfWorkRepository.java

@@ -25,7 +25,6 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.ByteArrayInputStream;
-import java.io.IOException;
 import java.util.LinkedList;
 import java.util.List;
 
@@ -37,6 +36,7 @@ import ch.dissem.bitmessage.utils.Encode;
 import ch.dissem.bitmessage.utils.Strings;
 
 import static ch.dissem.bitmessage.utils.Singleton.cryptography;
+import static ch.dissem.bitmessage.utils.Strings.hex;
 
 /**
  * @author Christian Basler
@@ -82,11 +82,10 @@ public class AndroidProofOfWorkRepository implements ProofOfWorkRepository, Inte
         SQLiteDatabase db = sql.getReadableDatabase();
         try (Cursor c = db.query(
             TABLE_NAME, projection,
-                "initial_hash = X'" + Strings.hex(initialHash) + "'",
+            "initial_hash=X'" + hex(initialHash) + "'",
             null, null, null, null
         )) {
-            c.moveToFirst();
+            if (c.moveToFirst()) {
-            if (!c.isAfterLast()) {
                 int version = c.getInt(c.getColumnIndex(COLUMN_VERSION));
                 byte[] blob = c.getBlob(c.getColumnIndex(COLUMN_DATA));
                 if (c.isNull(c.getColumnIndex(COLUMN_MESSAGE_ID))) {
@@ -110,7 +109,7 @@ public class AndroidProofOfWorkRepository implements ProofOfWorkRepository, Inte
             }
         }
         throw new RuntimeException("Object requested that we don't have. Initial hash: " +
-                Strings.hex(initialHash));
+            hex(initialHash));
     }
 
     @Override
@@ -127,11 +126,9 @@ public class AndroidProofOfWorkRepository implements ProofOfWorkRepository, Inte
             TABLE_NAME, projection,
             null, null, null, null, null
         )) {
-            c.moveToFirst();
+            while (c.moveToNext()) {
-            while (!c.isAfterLast()) {
                 byte[] initialHash = c.getBlob(c.getColumnIndex(COLUMN_INITIAL_HASH));
                 result.add(initialHash);
-                c.moveToNext();
             }
         }
         return result;
@@ -156,8 +153,6 @@ public class AndroidProofOfWorkRepository implements ProofOfWorkRepository, Inte
             db.insertOrThrow(TABLE_NAME, null, values);
         } catch (SQLiteConstraintException e) {
             LOG.trace(e.getMessage(), e);
-        } catch (IOException e) {
-            LOG.error(e.getMessage(), e);
         }
     }
 
@@ -169,8 +164,10 @@ public class AndroidProofOfWorkRepository implements ProofOfWorkRepository, Inte
     @Override
     public void removeObject(byte[] initialHash) {
         SQLiteDatabase db = sql.getWritableDatabase();
-        db.delete(TABLE_NAME,
+        db.delete(
-                "initial_hash = X'" + Strings.hex(initialHash) + "'",
+            TABLE_NAME,
-                null);
+            "initial_hash=X'" + hex(initialHash) + "'",
+            null
+        );
     }
 }

app/src/main/java/ch/dissem/apps/abit/repository/SqlHelper.java

@@ -19,6 +19,7 @@ package ch.dissem.apps.abit.repository;
 import android.content.Context;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;
+
 import ch.dissem.apps.abit.util.Assets;
 
 /**
@@ -26,7 +27,7 @@ import ch.dissem.apps.abit.util.Assets;
  */
 public class SqlHelper extends SQLiteOpenHelper {
     // If you change the database schema, you must increment the database version.
-    public static final int DATABASE_VERSION = 4;
+    public static final int DATABASE_VERSION = 5;
     public static final String DATABASE_NAME = "jabit.db";
 
     protected final Context ctx;
@@ -38,7 +39,7 @@ public class SqlHelper extends SQLiteOpenHelper {
 
     @Override
     public void onCreate(SQLiteDatabase db) {
-        onUpgrade(db, 0, 2);
+        onUpgrade(db, 0, DATABASE_VERSION);
     }
 
     @Override
@@ -56,8 +57,11 @@ public class SqlHelper extends SQLiteOpenHelper {
             case 3:
                 executeMigration(db, "V3.1__Update_table_POW");
                 executeMigration(db, "V3.2__Update_table_message");
+            case 4:
+                executeMigration(db, "V3.3__Create_table_node");
             default:
-                // Nothing to do. Let's assume we won't upgrade from a version that's newer than DATABASE_VERSION.
+                // Nothing to do. Let's assume we won't upgrade from a version that's newer than
+                // DATABASE_VERSION.
         }
     }
 

app/src/main/java/ch/dissem/apps/abit/service/Singleton.java

@@ -28,16 +28,17 @@ import ch.dissem.apps.abit.pow.ServerPowEngine;
 import ch.dissem.apps.abit.repository.AndroidAddressRepository;
 import ch.dissem.apps.abit.repository.AndroidInventory;
 import ch.dissem.apps.abit.repository.AndroidMessageRepository;
+import ch.dissem.apps.abit.repository.AndroidNodeRegistry;
 import ch.dissem.apps.abit.repository.AndroidProofOfWorkRepository;
 import ch.dissem.apps.abit.repository.SqlHelper;
 import ch.dissem.apps.abit.util.Constants;
 import ch.dissem.bitmessage.BitmessageContext;
 import ch.dissem.bitmessage.entity.BitmessageAddress;
-import ch.dissem.bitmessage.networking.DefaultNetworkHandler;
+import ch.dissem.bitmessage.networking.nio.NioNetworkHandler;
 import ch.dissem.bitmessage.ports.AddressRepository;
-import ch.dissem.bitmessage.ports.MemoryNodeRegistry;
 import ch.dissem.bitmessage.ports.MessageRepository;
 import ch.dissem.bitmessage.ports.ProofOfWorkRepository;
+import ch.dissem.bitmessage.utils.TTL;
 
 import static ch.dissem.bitmessage.utils.UnixTime.DAY;
 
@@ -58,6 +59,7 @@ public class Singleton {
                     final Context ctx = context.getApplicationContext();
                     SqlHelper sqlHelper = new SqlHelper(ctx);
                     powRepo = new AndroidProofOfWorkRepository(sqlHelper);
+                    TTL.pubkey(2 * DAY);
                     bitmessageContext = new BitmessageContext.Builder()
                             .proofOfWorkEngine(new SwitchingProofOfWorkEngine(
                                     ctx, Constants.PREFERENCE_SERVER_POW,
@@ -65,15 +67,14 @@ public class Singleton {
                                     new ServicePowEngine(ctx)
                             ))
                             .cryptography(new AndroidCryptography())
-                            .nodeRegistry(new MemoryNodeRegistry())
+                            .nodeRegistry(new AndroidNodeRegistry(sqlHelper))
                             .inventory(new AndroidInventory(sqlHelper))
                             .addressRepo(new AndroidAddressRepository(sqlHelper))
                             .messageRepo(new AndroidMessageRepository(sqlHelper, ctx))
                             .powRepo(powRepo)
-                            .networkHandler(new DefaultNetworkHandler())
+                            .networkHandler(new NioNetworkHandler())
                             .listener(getMessageListener(ctx))
                             .doNotSendPubkeyOnIdentityCreation()
-                            .pubkeyTTL(2 * DAY)
                             .build();
                 }
             }

build.gradle

@@ -9,7 +9,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.2'
+        classpath 'com.android.tools.build:gradle:2.1.3'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files