bitmessage/Jabit
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Code cleanup & improvements

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- most notably removed some unnecessary synchronize blocks in the DefaultNetworkHandler
This commit is contained in:
Christian Basler 2016-02-26 14:34:08 +01:00
parent 382cb80a87
commit bc68a5d3ec
19 changed files with 286 additions and 217 deletions
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3
core/src/main/java/ch/dissem/bitmessage/BitmessageContext.java
View File

@ -302,9 +302,6 @@ public class BitmessageContext {
long connectionTTL = 30 * MINUTE;
boolean sendPubkeyOnIdentityCreation = true;
public Builder() {
}
public Builder port(int port) {
this.port = port;
return this;

3
core/src/main/java/ch/dissem/bitmessage/entity/Addr.java
View File

@ -55,9 +55,6 @@ public class Addr implements MessagePayload {
public static final class Builder {
private List<NetworkAddress> addresses = new ArrayList<NetworkAddress>();
public Builder() {
}
public Builder addresses(Collection<NetworkAddress> addresses){
this.addresses.addAll(addresses);
return this;

2
core/src/main/java/ch/dissem/bitmessage/entity/BitmessageAddress.java
View File

@ -188,7 +188,7 @@ public class BitmessageAddress implements Serializable {
@Override
public String toString() {
return alias != null ? alias : address;
return alias == null ? address : alias;
}
public byte[] getRipe() {

5
core/src/main/java/ch/dissem/bitmessage/entity/GetData.java
View File

@ -28,6 +28,8 @@ import java.util.List;
* The 'getdata' command is used to request objects from a node.
*/
public class GetData implements MessagePayload {
public static final int MAX_INVENTORY_SIZE = 50_000;
List<InventoryVector> inventory;
private GetData(Builder builder) {
@ -54,9 +56,6 @@ public class GetData implements MessagePayload {
public static final class Builder {
private List<InventoryVector> inventory = new LinkedList<>();
public Builder() {
}
public Builder addInventoryVector(InventoryVector inventoryVector) {
this.inventory.add(inventoryVector);
return this;

3
core/src/main/java/ch/dissem/bitmessage/entity/Inv.java
View File

@ -54,9 +54,6 @@ public class Inv implements MessagePayload {
public static final class Builder {
private List<InventoryVector> inventory = new LinkedList<>();
public Builder() {
}
public Builder addInventoryVector(InventoryVector inventoryVector) {
this.inventory.add(inventoryVector);
return this;

6
core/src/main/java/ch/dissem/bitmessage/entity/ObjectMessage.java
View File

@ -156,10 +156,10 @@ public class ObjectMessage implements MessagePayload {
@Override
public void write(OutputStream out) throws IOException {
if (nonce != null) {
out.write(nonce);
} else {
if (nonce == null) {
out.write(new byte[8]);
} else {
out.write(nonce);
}
out.write(getPayloadBytesWithoutNonce());
}

3
core/src/main/java/ch/dissem/bitmessage/entity/Version.java
View File

@ -143,9 +143,6 @@ public class Version implements MessagePayload {
private String userAgent;
private long[] streamNumbers;
public Builder() {
}
public Builder defaults() {
version = BitmessageContext.CURRENT_VERSION;
services = 1;

3
core/src/main/java/ch/dissem/bitmessage/entity/payload/V2Pubkey.java
View File

@ -96,9 +96,6 @@ public class V2Pubkey extends Pubkey {
private byte[] publicSigningKey;
private byte[] publicEncryptionKey;
public Builder() {
}
public Builder stream(long streamNumber) {
this.streamNumber = streamNumber;
return this;

3
core/src/main/java/ch/dissem/bitmessage/entity/payload/V3Pubkey.java
View File

@ -123,9 +123,6 @@ public class V3Pubkey extends V2Pubkey {
private long extraBytes;
private byte[] signature = new byte[0];
public Builder() {
}
public Builder stream(long streamNumber) {
this.streamNumber = streamNumber;
return this;

3
core/src/main/java/ch/dissem/bitmessage/entity/valueobject/NetworkAddress.java
View File

@ -134,9 +134,6 @@ public class NetworkAddress implements Streamable {
private byte[] ipv6;
private int port;
public Builder() {
}
public Builder time(final long time) {
this.time = time;
return this;

12
core/src/main/java/ch/dissem/bitmessage/ports/SimplePOWEngine.java
View File

@ -20,6 +20,7 @@ import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.utils.Bytes;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import static ch.dissem.bitmessage.utils.Bytes.inc;
@ -33,18 +34,17 @@ import static ch.dissem.bitmessage.utils.Bytes.inc;
public class SimplePOWEngine implements ProofOfWorkEngine {
@Override
public void calculateNonce(byte[] initialHash, byte[] target, Callback callback) {
byte[] nonce = new byte[8];
MessageDigest mda;
try {
mda = MessageDigest.getInstance("SHA-512");
} catch (Exception e) {
throw new ApplicationException(e);
}
MessageDigest mda = MessageDigest.getInstance("SHA-512");
byte[] nonce = new byte[8];
do {
inc(nonce);
mda.update(nonce);
mda.update(initialHash);
} while (Bytes.lt(target, mda.digest(mda.digest()), 8));
callback.onNonceCalculated(initialHash, nonce);
} catch (NoSuchAlgorithmException e) {
throw new ApplicationException(e);
}
}
}

8
demo/src/main/java/ch/dissem/bitmessage/demo/Application.java
View File

@ -289,18 +289,18 @@ public class Application {
System.out.println("Stream: " + address.getStream());
System.out.println("Version: " + address.getVersion());
if (address.getPrivateKey() == null) {
if (address.getPubkey() != null) {
System.out.println("Public key available");
} else {
if (address.getPubkey() == null) {
System.out.println("Public key still missing");
} else {
System.out.println("Public key available");
}
}
}
private void messages() {
String command;
List<Plaintext> messages = ctx.messages().findMessages(Plaintext.Status.RECEIVED);
do {
List<Plaintext> messages = ctx.messages().findMessages(Plaintext.Status.RECEIVED);
System.out.println();
int i = 0;
for (Plaintext message : messages) {

1
networking/src/main/java/ch/dissem/bitmessage/networking/Connection.java
View File

@ -21,7 +21,6 @@ import ch.dissem.bitmessage.InternalContext;
import ch.dissem.bitmessage.entity.*;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.exception.InsufficientProofOfWorkException;
import ch.dissem.bitmessage.exception.NodeException;
import ch.dissem.bitmessage.factory.Factory;

120
networking/src/main/java/ch/dissem/bitmessage/networking/ConnectionOrganizer.java Normal file
View File

@ -0,0 +1,120 @@
/*
* Copyright 2016 Christian Basler
*
* 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 ch.dissem.bitmessage.networking;
import ch.dissem.bitmessage.InternalContext;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.ports.NetworkHandler;
import ch.dissem.bitmessage.utils.UnixTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Iterator;
import java.util.List;
import static ch.dissem.bitmessage.networking.Connection.Mode.CLIENT;
import static ch.dissem.bitmessage.networking.DefaultNetworkHandler.NETWORK_MAGIC_NUMBER;
/**
* @author Christian Basler
*/
public class ConnectionOrganizer implements Runnable {
private static final Logger LOG = LoggerFactory.getLogger(ConnectionOrganizer.class);
private final InternalContext ctx;
private final DefaultNetworkHandler networkHandler;
private final NetworkHandler.MessageListener listener;
private Connection initialConnection;
public ConnectionOrganizer(InternalContext ctx,
DefaultNetworkHandler networkHandler,
NetworkHandler.MessageListener listener) {
this.ctx = ctx;
this.networkHandler = networkHandler;
this.listener = listener;
}
@Override
public void run() {
try {
while (networkHandler.isRunning()) {
try {
int active = 0;
long now = UnixTime.now();
int diff = networkHandler.connections.size() - ctx.getConnectionLimit();
if (diff > 0) {
for (Connection c : networkHandler.connections) {
c.disconnect();
diff--;
if (diff == 0) break;
}
}
boolean forcedDisconnect = false;
for (Iterator<Connection> iterator = networkHandler.connections.iterator(); iterator.hasNext(); ) {
Connection c = iterator.next();
// Just in case they were all created at the same time, don't disconnect
// all at once.
if (!forcedDisconnect && now - c.getStartTime() > ctx.getConnectionTTL()) {
c.disconnect();
forcedDisconnect = true;
}
switch (c.getState()) {
case DISCONNECTED:
iterator.remove();
break;
case ACTIVE:
active++;
break;
default:
// nothing to do
}
}
if (active < NETWORK_MAGIC_NUMBER) {
List<NetworkAddress> addresses = ctx.getNodeRegistry().getKnownAddresses(
NETWORK_MAGIC_NUMBER - active, ctx.getStreams());
boolean first = active == 0 && initialConnection == null;
for (NetworkAddress address : addresses) {
Connection c = new Connection(ctx, CLIENT, address, listener, networkHandler.requestedObjects);
if (first) {
initialConnection = c;
first = false;
}
networkHandler.startConnection(c);
}
Thread.sleep(10000);
} else if (initialConnection != null) {
initialConnection.disconnect();
initialConnection = null;
Thread.sleep(10000);
} else {
Thread.sleep(30000);
}
} catch (InterruptedException e) {
networkHandler.stop();
} catch (Exception e) {
LOG.error("Error in connection manager. Ignored.", e);
}
}
} finally {
LOG.debug("Connection manager shutting down.");
networkHandler.stop();
}
}
}

148
networking/src/main/java/ch/dissem/bitmessage/networking/DefaultNetworkHandler.java
View File

@ -22,25 +22,21 @@ import ch.dissem.bitmessage.entity.CustomMessage;
import ch.dissem.bitmessage.entity.GetData;
import ch.dissem.bitmessage.entity.NetworkMessage;
import ch.dissem.bitmessage.entity.valueobject.InventoryVector;
import ch.dissem.bitmessage.entity.valueobject.NetworkAddress;
import ch.dissem.bitmessage.exception.ApplicationException;
import ch.dissem.bitmessage.exception.NodeException;
import ch.dissem.bitmessage.factory.Factory;
import ch.dissem.bitmessage.ports.NetworkHandler;
import ch.dissem.bitmessage.utils.Collections;
import ch.dissem.bitmessage.utils.Property;
import ch.dissem.bitmessage.utils.UnixTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.*;
import java.util.concurrent.*;
import static ch.dissem.bitmessage.networking.Connection.Mode.CLIENT;
import static ch.dissem.bitmessage.networking.Connection.Mode.SERVER;
import static ch.dissem.bitmessage.networking.Connection.State.ACTIVE;
import static ch.dissem.bitmessage.utils.DebugUtils.inc;
@ -54,13 +50,13 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
public final static int NETWORK_MAGIC_NUMBER = 8;
private final Collection<Connection> connections = new ConcurrentLinkedQueue<>();
final Collection<Connection> connections = new ConcurrentLinkedQueue<>();
private final ExecutorService pool;
private InternalContext ctx;
private ServerSocket serverSocket;
private ServerRunnable server;
private volatile boolean running;
private Set<InventoryVector> requestedObjects = newSetFromMap(new ConcurrentHashMap<InventoryVector, Boolean>(50_000));
final Set<InventoryVector> requestedObjects = newSetFromMap(new ConcurrentHashMap<InventoryVector, Boolean>(50_000));
public DefaultNetworkHandler() {
pool = Executors.newCachedThreadPool(new ThreadFactory() {
@ -122,93 +118,9 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
try {
running = true;
connections.clear();
serverSocket = new ServerSocket(ctx.getPort());
pool.execute(new Runnable() {
@Override
public void run() {
while (!serverSocket.isClosed()) {
try {
Socket socket = serverSocket.accept();
socket.setSoTimeout(Connection.READ_TIMEOUT);
startConnection(new Connection(ctx, SERVER, socket, listener, requestedObjects));
} catch (IOException e) {
LOG.debug(e.getMessage(), e);
}
}
}
});
pool.execute(new Runnable() {
public Connection initialConnection;
@Override
public void run() {
try {
while (running) {
try {
int active = 0;
long now = UnixTime.now();
synchronized (connections) {
int diff = connections.size() - ctx.getConnectionLimit();
if (diff > 0) {
for (Connection c : connections) {
c.disconnect();
diff--;
if (diff == 0) break;
}
}
boolean forcedDisconnect = false;
for (Iterator<Connection> iterator = connections.iterator(); iterator.hasNext(); ) {
Connection c = iterator.next();
// Just in case they were all created at the same time, don't disconnect
// all at once.
if (!forcedDisconnect && now - c.getStartTime() > ctx.getConnectionTTL()) {
c.disconnect();
forcedDisconnect = true;
}
switch (c.getState()) {
case DISCONNECTED:
iterator.remove();
break;
case ACTIVE:
active++;
break;
default:
// nothing to do
}
}
}
if (active < NETWORK_MAGIC_NUMBER) {
List<NetworkAddress> addresses = ctx.getNodeRegistry().getKnownAddresses(
NETWORK_MAGIC_NUMBER - active, ctx.getStreams());
boolean first = active == 0 && initialConnection == null;
for (NetworkAddress address : addresses) {
Connection c = new Connection(ctx, CLIENT, address, listener, requestedObjects);
if (first) {
initialConnection = c;
first = false;
}
startConnection(c);
}
Thread.sleep(10000);
} else if (initialConnection != null) {
initialConnection.disconnect();
initialConnection = null;
Thread.sleep(10000);
} else {
Thread.sleep(30000);
}
} catch (InterruptedException e) {
running = false;
} catch (Exception e) {
LOG.error("Error in connection manager. Ignored.", e);
}
}
} finally {
LOG.debug("Connection manager shutting down.");
running = false;
}
}
});
server = new ServerRunnable(ctx, this, listener);
pool.execute(server);
pool.execute(new ConnectionOrganizer(ctx, this, listener));
} catch (IOException e) {
throw new ApplicationException(e);
}
@ -221,13 +133,9 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
@Override
public void stop() {
running = false;
try {
serverSocket.close();
} catch (IOException e) {
LOG.debug(e.getMessage(), e);
}
server.close();
synchronized (connections) {
running = false;
for (Connection c : connections) {
c.disconnect();
}
@ -235,8 +143,12 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
requestedObjects.clear();
}
private void startConnection(Connection c) {
void startConnection(Connection c) {
if (!running) return;
synchronized (connections) {
if (!running) return;
// prevent connecting twice to the same node
if (connections.contains(c)) {
return;
@ -250,13 +162,11 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
@Override
public void offer(final InventoryVector iv) {
List<Connection> target = new LinkedList<>();
synchronized (connections) {
for (Connection connection : connections) {
if (connection.getState() == ACTIVE && !connection.knowsOf(iv)) {
target.add(connection);
}
}
}
List<Connection> randomSubset = Collections.selectRandom(NETWORK_MAGIC_NUMBER, target);
for (Connection connection : randomSubset) {
connection.offer(iv);
@ -269,7 +179,6 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
TreeMap<Long, Integer> incomingConnections = new TreeMap<>();
TreeMap<Long, Integer> outgoingConnections = new TreeMap<>();
synchronized (connections) {
for (Connection connection : connections) {
if (connection.getState() == ACTIVE) {
long stream = connection.getNode().getStream();
@ -281,7 +190,6 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
}
}
}
}
Property[] streamProperties = new Property[streams.size()];
int i = 0;
for (Long stream : streams) {
@ -303,7 +211,7 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
void request(Set<InventoryVector> inventoryVectors) {
if (!running || inventoryVectors.isEmpty()) return;
synchronized (connections) {
Map<Connection, List<InventoryVector>> distribution = new HashMap<>();
for (Connection connection : connections) {
if (connection.getState() == ACTIVE) {
@ -311,24 +219,19 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
}
}
Iterator<InventoryVector> iterator = inventoryVectors.iterator();
InventoryVector next;
if (iterator.hasNext()) {
next = iterator.next();
} else {
if (!iterator.hasNext()) {
return;
}
boolean firstRound = true;
while (firstRound || iterator.hasNext()) {
if (!firstRound) {
next = iterator.next();
firstRound = true;
} else {
firstRound = false;
}
InventoryVector next = iterator.next();
Connection previous = null;
do {
for (Connection connection : distribution.keySet()) {
if (connection == previous) {
next = iterator.next();
}
if (connection.knowsOf(next)) {
List<InventoryVector> ivs = distribution.get(connection);
if (ivs.size() == 50_000) {
if (ivs.size() == GetData.MAX_INVENTORY_SIZE) {
connection.send(new GetData.Builder().inventory(ivs).build());
ivs.clear();
}
@ -337,14 +240,14 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
if (iterator.hasNext()) {
next = iterator.next();
firstRound = true;
previous = connection;
} else {
firstRound = false;
break;
}
}
}
}
} while (iterator.hasNext());
for (Connection connection : distribution.keySet()) {
List<InventoryVector> ivs = distribution.get(connection);
if (!ivs.isEmpty()) {
@ -352,5 +255,4 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
}
}
}
}
}

70
networking/src/main/java/ch/dissem/bitmessage/networking/ServerRunnable.java Normal file
View File

@ -0,0 +1,70 @@
/*
* Copyright 2016 Christian Basler
*
* 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 ch.dissem.bitmessage.networking;
import ch.dissem.bitmessage.InternalContext;
import ch.dissem.bitmessage.ports.NetworkHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.Closeable;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import static ch.dissem.bitmessage.networking.Connection.Mode.SERVER;
/**
* @author Christian Basler
*/
public class ServerRunnable implements Runnable, Closeable {
private static final Logger LOG = LoggerFactory.getLogger(ServerRunnable.class);
private final InternalContext ctx;
private final ServerSocket serverSocket;
private final DefaultNetworkHandler networkHandler;
private final NetworkHandler.MessageListener listener;
public ServerRunnable(InternalContext ctx, DefaultNetworkHandler networkHandler, NetworkHandler.MessageListener listener) throws IOException {
this.ctx = ctx;
this.networkHandler = networkHandler;
this.listener = listener;
this.serverSocket = new ServerSocket(ctx.getPort());
}
@Override
public void run() {
while (!serverSocket.isClosed()) {
try {
Socket socket = serverSocket.accept();
socket.setSoTimeout(Connection.READ_TIMEOUT);
networkHandler.startConnection(new Connection(ctx, SERVER, socket, listener,
networkHandler.requestedObjects));
} catch (IOException e) {
LOG.debug(e.getMessage(), e);
}
}
}
@Override
public void close() {
try {
serverSocket.close();
} catch (IOException e) {
LOG.debug(e.getMessage(), e);
}
}
}

8
repositories/src/main/java/ch/dissem/bitmessage/repository/JdbcAddressRepository.java
View File

@ -99,10 +99,7 @@ public class JdbcAddressRepository extends JdbcHelper implements AddressReposito
BitmessageAddress address;
InputStream privateKeyStream = rs.getBinaryStream("private_key");
if (privateKeyStream != null) {
PrivateKey privateKey = PrivateKey.read(privateKeyStream);
address = new BitmessageAddress(privateKey);
} else {
if (privateKeyStream == null) {
address = new BitmessageAddress(rs.getString("address"));
Blob publicKeyBlob = rs.getBlob("public_key");
if (publicKeyBlob != null) {
@ -113,6 +110,9 @@ public class JdbcAddressRepository extends JdbcHelper implements AddressReposito
}
address.setPubkey(pubkey);
}
} else {
PrivateKey privateKey = PrivateKey.read(privateKeyStream);
address = new BitmessageAddress(privateKey);
}
address.setAlias(rs.getString("alias"));
address.setSubscribed(rs.getBoolean("subscribed"));

6
repositories/src/main/java/ch/dissem/bitmessage/repository/JdbcHelper.java
View File

@ -77,12 +77,12 @@ public abstract class JdbcHelper {
}
protected void writeBlob(PreparedStatement ps, int parameterIndex, Streamable data) throws SQLException, IOException {
if (data != null) {
if (data == null) {
ps.setBytes(parameterIndex, null);
} else {
ByteArrayOutputStream os = new ByteArrayOutputStream();
data.write(os);
ps.setBytes(parameterIndex, os.toByteArray());
} else {
ps.setBytes(parameterIndex, null);
}
}
}

16
repositories/src/main/java/ch/dissem/bitmessage/repository/JdbcMessageRepository.java
View File

@ -90,10 +90,10 @@ public class JdbcMessageRepository extends JdbcHelper implements MessageReposito
@Override
public int countUnread(Label label) {
String where;
if (label != null) {
where = "id IN (SELECT message_id FROM Message_Label WHERE label_id=" + label.getId() + ") AND ";
} else {
if (label == null) {
where = "";
} else {
where = "id IN (SELECT message_id FROM Message_Label WHERE label_id=" + label.getId() + ") AND ";
}
where += "id IN (SELECT message_id FROM Message_Label WHERE label_id IN (" +
"SELECT id FROM Label WHERE type = '" + Label.Type.UNREAD.name() + "'))";
@ -237,14 +237,14 @@ public class JdbcMessageRepository extends JdbcHelper implements MessageReposito
PreparedStatement ps = connection.prepareStatement(
"INSERT INTO Message (iv, type, sender, recipient, data, sent, received, status, initial_hash) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)",
Statement.RETURN_GENERATED_KEYS);
ps.setBytes(1, message.getInventoryVector() != null ? message.getInventoryVector().getHash() : null);
ps.setBytes(1, message.getInventoryVector() == null ? null : message.getInventoryVector().getHash());
ps.setString(2, message.getType().name());
ps.setString(3, message.getFrom().getAddress());
ps.setString(4, message.getTo() != null ? message.getTo().getAddress() : null);
ps.setString(4, message.getTo() == null ? null : message.getTo().getAddress());
writeBlob(ps, 5, message);
ps.setLong(6, message.getSent());
ps.setLong(7, message.getReceived());
ps.setString(8, message.getStatus() != null ? message.getStatus().name() : null);
ps.setString(8, message.getStatus() == null ? null : message.getStatus().name());
ps.setBytes(9, message.getInitialHash());
ps.executeUpdate();
@ -258,10 +258,10 @@ public class JdbcMessageRepository extends JdbcHelper implements MessageReposito
private void update(Connection connection, Plaintext message) throws SQLException, IOException {
PreparedStatement ps = connection.prepareStatement(
"UPDATE Message SET iv=?, sent=?, received=?, status=?, initial_hash=? WHERE id=?");
ps.setBytes(1, message.getInventoryVector() != null ? message.getInventoryVector().getHash() : null);
ps.setBytes(1, message.getInventoryVector() == null ? null : message.getInventoryVector().getHash());
ps.setLong(2, message.getSent());
ps.setLong(3, message.getReceived());
ps.setString(4, message.getStatus() != null ? message.getStatus().name() : null);
ps.setString(4, message.getStatus() == null ? null : message.getStatus().name());
ps.setBytes(5, message.getInitialHash());
ps.setLong(6, (Long) message.getId());
ps.executeUpdate();