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Connections now use two separate threads for writing and listening 

- this should avoid dead locks, specifically when connecting to Jabit :/
- also, Java 8 features are now allowed in modules not needed by Android clients
This commit is contained in:
Christian Basler 2015-10-14 18:37:43 +02:00
parent 117ac3ca73
commit 511b3c1754
9 changed files with 246 additions and 180 deletions
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2
demo/build.gradle
View File

@ -14,6 +14,8 @@ uploadArchives {
}
}
sourceCompatibility = 1.8
task fatCapsule(type: FatCapsule) {
applicationClass 'ch.dissem.bitmessage.demo.Main'
}

2
demo/src/main/java/ch/dissem/bitmessage/demo/Application.java
View File

@ -52,7 +52,7 @@ public class Application {
.messageRepo(new JdbcMessageRepository(jdbcConfig))
.networkHandler(new DefaultNetworkHandler())
.security(new BouncySecurity())
// .port(48444)
.port(48444)
.listener(new BitmessageContext.Listener() {
@Override
public void receive(Plaintext plaintext) {

3
domain/src/main/java/ch/dissem/bitmessage/factory/Factory.java
View File

@ -23,7 +23,6 @@ import ch.dissem.bitmessage.entity.Plaintext;
import ch.dissem.bitmessage.entity.payload.*;
import ch.dissem.bitmessage.entity.valueobject.PrivateKey;
import ch.dissem.bitmessage.exception.NodeException;
import ch.dissem.bitmessage.ports.Security;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@ -155,7 +154,7 @@ public class Factory {
}
}
// fallback: just store the message - we don't really care what it is
// LOG.info("Unexpected object type: " + objectType);
LOG.trace("Unexpected object type: " + objectType);
return GenericPayload.read(version, stream, streamNumber, length);
}

15
domain/src/main/java/ch/dissem/bitmessage/ports/Inventory.java
View File

@ -26,17 +26,32 @@ import java.util.List;
* The Inventory stores and retrieves objects, cleans up outdated objects and can tell which objects are still missing.
*/
public interface Inventory {
/**
* Returns the IVs of all valid objects we have for the given streams
*/
List<InventoryVector> getInventory(long... streams);
/**
* Returns the IVs of all objects in the offer that we don't have already. Implementations are allowed to
* ignore the streams parameter, but it must be set when calling this method.
*/
List<InventoryVector> getMissing(List<InventoryVector> offer, long... streams);
ObjectMessage getObject(InventoryVector vector);
/**
* This method is mainly used to search for public keys to newly added addresses or broadcasts from new
* subscriptions.
*/
List<ObjectMessage> getObjects(long stream, long version, ObjectType... types);
void storeObject(ObjectMessage object);
boolean contains(ObjectMessage object);
/**
* Deletes all objects that expired 5 minutes ago or earlier
* (so we don't accidentally request objects we just deleted)
*/
void cleanup();
}

1
domain/src/main/resources/nodes.txt
View File

@ -12,7 +12,6 @@
109.147.204.113:1195
178.11.46.221:8444
# Add named nodes at the end, as resolving them might take time
dissem.ch:8444
[stream 2]

234
networking/src/main/java/ch/dissem/bitmessage/networking/Connection.java
View File

@ -49,7 +49,7 @@ import static ch.dissem.bitmessage.utils.UnixTime.MINUTE;
/**
* A connection to a specific node
*/
public class Connection implements Runnable {
public class Connection {
public static final int READ_TIMEOUT = 2000;
private final static Logger LOG = LoggerFactory.getLogger(Connection.class);
private static final int CONNECT_TIMEOUT = 5000;
@ -63,13 +63,16 @@ public class Connection implements Runnable {
private final Queue<MessagePayload> sendingQueue = new ConcurrentLinkedDeque<>();
private final Map<InventoryVector, Long> requestedObjects;
private final long syncTimeout;
private final ReaderRunnable reader = new ReaderRunnable();
private final WriterRunnable writer = new WriterRunnable();
private State state;
private volatile State state;
private InputStream in;
private OutputStream out;
private int version;
private long[] streams;
private int readTimeoutCounter;
private boolean socketInitialized;
public Connection(InternalContext context, Mode mode, Socket socket, MessageListener listener,
ConcurrentMap<InventoryVector, Long> requestedObjectsMap) throws IOException {
@ -118,86 +121,6 @@ public class Connection implements Runnable {
return node;
}
@Override
public void run() {
try (Socket socket = this.socket) {
if (!socket.isConnected()) {
LOG.debug("Trying to connect to node " + node);
socket.connect(new InetSocketAddress(node.toInetAddress(), node.getPort()), CONNECT_TIMEOUT);
}
socket.setSoTimeout(READ_TIMEOUT);
this.in = socket.getInputStream();
this.out = socket.getOutputStream();
if (mode == CLIENT) {
send(new Version.Builder().defaults().addrFrom(host).addrRecv(node).build());
}
while (state != DISCONNECTED) {
try {
NetworkMessage msg = Factory.getNetworkMessage(version, in);
if (msg == null)
continue;
switch (state) {
case ACTIVE:
receiveMessage(msg.getPayload());
sendQueue();
break;
default:
switch (msg.getPayload().getCommand()) {
case VERSION:
Version payload = (Version) msg.getPayload();
if (payload.getNonce() == ctx.getClientNonce()) {
LOG.info("Tried to connect to self, disconnecting.");
disconnect();
} else if (payload.getVersion() >= BitmessageContext.CURRENT_VERSION) {
this.version = payload.getVersion();
this.streams = payload.getStreams();
send(new VerAck());
switch (mode) {
case SERVER:
send(new Version.Builder().defaults().addrFrom(host).addrRecv(node).build());
break;
case CLIENT:
activateConnection();
break;
}
} else {
LOG.info("Received unsupported version " + payload.getVersion() + ", disconnecting.");
disconnect();
}
break;
case VERACK:
switch (mode) {
case SERVER:
activateConnection();
break;
case CLIENT:
// NO OP
break;
}
break;
default:
throw new NodeException("Command 'version' or 'verack' expected, but was '"
+ msg.getPayload().getCommand() + "'");
}
}
if (socket.isClosed() || syncFinished(msg)) disconnect();
} catch (SocketTimeoutException ignore) {
if (state == ACTIVE) {
sendQueue();
if (syncFinished(null)) disconnect();
}
}
}
} catch (IOException | NodeException e) {
disconnect();
LOG.debug("Disconnected from node " + node + ": " + e.getMessage());
} catch (RuntimeException e) {
disconnect();
throw e;
}
}
@SuppressWarnings("RedundantIfStatement")
private boolean syncFinished(NetworkMessage msg) {
if (syncTimeout == 0 || state != ACTIVE) {
@ -229,15 +152,6 @@ public class Connection implements Runnable {
ctx.getNodeRegistry().offerAddresses(Collections.singletonList(node));
}
private void sendQueue() {
if (sendingQueue.size() > 0) {
LOG.debug("Sending " + sendingQueue.size() + " messages to node " + node);
}
for (MessagePayload msg = sendingQueue.poll(); msg != null; msg = sendingQueue.poll()) {
send(msg);
}
}
private void cleanupIvCache() {
Long fiveMinutesAgo = UnixTime.now(-5 * MINUTE);
for (Map.Entry<InventoryVector, Long> entry : ivCache.entrySet()) {
@ -310,10 +224,12 @@ public class Connection implements Runnable {
case OBJECT:
ObjectMessage objectMessage = (ObjectMessage) messagePayload;
try {
if (ctx.getInventory().contains(objectMessage)) {
LOG.debug("Received object " + objectMessage.getInventoryVector() + " - already in inventory");
break;
}
LOG.debug("Received object " + objectMessage.getInventoryVector());
security().checkProofOfWork(objectMessage, ctx.getNetworkNonceTrialsPerByte(), ctx.getNetworkExtraBytes());
if (ctx.getInventory().contains(objectMessage))
break;
listener.receive(objectMessage);
ctx.getInventory().storeObject(objectMessage);
// offer object to some random nodes so it gets distributed throughout the network:
@ -392,14 +308,136 @@ public class Connection implements Runnable {
return Objects.hash(node);
}
public void request(InventoryVector key) {
sendingQueue.offer(new GetData.Builder()
.addInventoryVector(key)
.build()
);
private synchronized void initSocket(Socket socket) throws IOException {
if (!socketInitialized) {
if (!socket.isConnected()) {
LOG.debug("Trying to connect to node " + node);
socket.connect(new InetSocketAddress(node.toInetAddress(), node.getPort()), CONNECT_TIMEOUT);
}
socket.setSoTimeout(READ_TIMEOUT);
in = socket.getInputStream();
out = socket.getOutputStream();
if (!socket.isConnected()) {
LOG.debug("Trying to connect to node " + node);
socket.connect(new InetSocketAddress(node.toInetAddress(), node.getPort()), CONNECT_TIMEOUT);
}
socket.setSoTimeout(READ_TIMEOUT);
in = socket.getInputStream();
out = socket.getOutputStream();
socketInitialized = true;
}
}
public ReaderRunnable getReader() {
return reader;
}
public WriterRunnable getWriter() {
return writer;
}
public enum Mode {SERVER, CLIENT}
public enum State {CONNECTING, ACTIVE, DISCONNECTED}
public class ReaderRunnable implements Runnable {
@Override
public void run() {
try (Socket socket = Connection.this.socket) {
initSocket(socket);
if (mode == CLIENT) {
send(new Version.Builder().defaults().addrFrom(host).addrRecv(node).build());
}
while (state != DISCONNECTED) {
try {
NetworkMessage msg = Factory.getNetworkMessage(version, in);
if (msg == null)
continue;
switch (state) {
case ACTIVE:
receiveMessage(msg.getPayload());
break;
default:
switch (msg.getPayload().getCommand()) {
case VERSION:
Version payload = (Version) msg.getPayload();
if (payload.getNonce() == ctx.getClientNonce()) {
LOG.info("Tried to connect to self, disconnecting.");
disconnect();
} else if (payload.getVersion() >= BitmessageContext.CURRENT_VERSION) {
version = payload.getVersion();
streams = payload.getStreams();
send(new VerAck());
switch (mode) {
case SERVER:
send(new Version.Builder().defaults().addrFrom(host).addrRecv(node).build());
break;
case CLIENT:
activateConnection();
break;
}
} else {
LOG.info("Received unsupported version " + payload.getVersion() + ", disconnecting.");
disconnect();
}
break;
case VERACK:
switch (mode) {
case SERVER:
activateConnection();
break;
case CLIENT:
// NO OP
break;
}
break;
default:
throw new NodeException("Command 'version' or 'verack' expected, but was '"
+ msg.getPayload().getCommand() + "'");
}
}
if (socket.isClosed() || syncFinished(msg)) disconnect();
} catch (SocketTimeoutException ignore) {
if (state == ACTIVE) {
if (syncFinished(null)) disconnect();
}
}
Thread.yield();
}
} catch (IOException | NodeException e) {
disconnect();
LOG.debug("Reader disconnected from node " + node + ": " + e.getMessage());
} catch (RuntimeException e) {
LOG.debug("Reader disconnecting from node " + node + " due to error: " + e.getMessage(), e);
disconnect();
} finally {
try {
socket.close();
} catch (Exception e) {
LOG.debug(e.getMessage(), e);
}
}
}
}
public class WriterRunnable implements Runnable {
@Override
public void run() {
try (Socket socket = Connection.this.socket) {
initSocket(socket);
while (state != DISCONNECTED) {
if (sendingQueue.size() > 0) {
LOG.debug("Sending " + sendingQueue.size() + " messages to node " + node);
send(sendingQueue.poll());
} else {
Thread.sleep(100);
}
}
} catch (IOException | InterruptedException e) {
LOG.debug("Writer disconnected from node " + node + ": " + e.getMessage());
disconnect();
}
}
}
}

95
networking/src/main/java/ch/dissem/bitmessage/networking/DefaultNetworkHandler.java
View File

@ -49,14 +49,17 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
public final static int NETWORK_MAGIC_NUMBER = 8;
private final static Logger LOG = LoggerFactory.getLogger(DefaultNetworkHandler.class);
private final List<Connection> connections = new LinkedList<>();
private final ExecutorService pool;
private InternalContext ctx;
private ServerSocket serverSocket;
private ExecutorService pool;
private Thread serverThread;
private Thread connectionManager;
private volatile boolean running;
private ConcurrentMap<InventoryVector, Long> requestedObjects = new ConcurrentHashMap<>();
public DefaultNetworkHandler() {
pool = Executors.newCachedThreadPool();
}
@Override
public void setContext(InternalContext context) {
this.ctx = context;
@ -65,9 +68,12 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
@Override
public Thread synchronize(InetAddress trustedHost, int port, MessageListener listener, long timeoutInSeconds) {
try {
Thread t = new Thread(Connection.sync(ctx, trustedHost, port, listener, timeoutInSeconds));
t.start();
return t;
Connection connection = Connection.sync(ctx, trustedHost, port, listener, timeoutInSeconds);
Thread tr = new Thread(connection.getReader());
Thread tw = new Thread(connection.getWriter());
tr.start();
tw.start();
return tr;
} catch (IOException e) {
throw new RuntimeException(e);
}
@ -78,14 +84,14 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
if (listener == null) {
throw new IllegalStateException("Listener must be set at start");
}
if (pool != null && !pool.isShutdown()) {
if (running) {
throw new IllegalStateException("Network already running - you need to stop first.");
}
try {
pool = Executors.newCachedThreadPool();
running = true;
connections.clear();
serverSocket = new ServerSocket(ctx.getPort());
serverThread = new Thread(new Runnable() {
pool.execute(new Runnable() {
@Override
public void run() {
while (!serverSocket.isClosed()) {
@ -98,44 +104,46 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
}
}
}
}, "server");
serverThread.start();
connectionManager = new Thread(new Runnable() {
});
pool.execute(new Runnable() {
@Override
public void run() {
while (!Thread.interrupted()) {
try {
int active = 0;
synchronized (connections) {
for (Iterator<Connection> iterator = connections.iterator(); iterator.hasNext(); ) {
Connection c = iterator.next();
if (c.getState() == DISCONNECTED) {
// Remove the current element from the iterator and the list.
iterator.remove();
}
if (c.getState() == ACTIVE) {
active++;
try {
while (running) {
try {
int active = 0;
synchronized (connections) {
for (Iterator<Connection> iterator = connections.iterator(); iterator.hasNext(); ) {
Connection c = iterator.next();
if (c.getState() == DISCONNECTED) {
// Remove the current element from the iterator and the list.
iterator.remove();
}
if (c.getState() == ACTIVE) {
active++;
}
}
}
}
if (active < NETWORK_MAGIC_NUMBER) {
List<NetworkAddress> addresses = ctx.getNodeRegistry().getKnownAddresses(
NETWORK_MAGIC_NUMBER - active, ctx.getStreams());
for (NetworkAddress address : addresses) {
startConnection(new Connection(ctx, CLIENT, address, listener, requestedObjects));
if (active < NETWORK_MAGIC_NUMBER) {
List<NetworkAddress> addresses = ctx.getNodeRegistry().getKnownAddresses(
NETWORK_MAGIC_NUMBER - active, ctx.getStreams());
for (NetworkAddress address : addresses) {
startConnection(new Connection(ctx, CLIENT, address, listener, requestedObjects));
}
}
Thread.sleep(30000);
} catch (InterruptedException e) {
running = false;
} catch (Exception e) {
LOG.error("Error in connection manager. Ignored.", e);
}
Thread.sleep(30000);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
} catch (Exception e) {
LOG.error("Error in connection manager. Ignored.", e);
}
} finally {
LOG.debug("Connection manager shutting down.");
running = false;
}
LOG.debug("Connection manager shutting down.");
}
}, "connection-manager");
connectionManager.start();
});
} catch (IOException e) {
throw new RuntimeException(e);
}
@ -143,18 +151,17 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
@Override
public boolean isRunning() {
return connectionManager != null && connectionManager.isAlive();
return running;
}
@Override
public void stop() {
connectionManager.interrupt();
running = false;
try {
serverSocket.close();
} catch (IOException e) {
LOG.debug(e.getMessage(), e);
}
pool.shutdown();
synchronized (connections) {
for (Connection c : connections) {
c.disconnect();
@ -170,7 +177,8 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
}
connections.add(c);
}
pool.execute(c);
pool.execute(c.getReader());
pool.execute(c.getWriter());
}
@Override
@ -222,8 +230,7 @@ public class DefaultNetworkHandler implements NetworkHandler, ContextHolder {
i++;
}
return new Property("network", null,
new Property("connectionManager",
connectionManager != null && connectionManager.isAlive() ? "running" : "stopped"),
new Property("connectionManager", running ? "running" : "stopped"),
new Property("connections", null, streamProperties)
);
}

2
repositories/build.gradle
View File

@ -10,6 +10,8 @@ uploadArchives {
}
}
sourceCompatibility = 1.8
dependencies {
compile project(':domain')
compile 'org.flywaydb:flyway-core:3.2.1'

72
repositories/src/main/java/ch/dissem/bitmessage/repository/JdbcInventory.java
View File

@ -27,12 +27,17 @@ import org.slf4j.LoggerFactory;
import java.sql.*;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import static ch.dissem.bitmessage.utils.UnixTime.MINUTE;
import static ch.dissem.bitmessage.utils.UnixTime.now;
public class JdbcInventory extends JdbcHelper implements Inventory {
private static final Logger LOG = LoggerFactory.getLogger(JdbcInventory.class);
private final Map<Long, Map<InventoryVector, Long>> cache = new ConcurrentHashMap<>();
public JdbcInventory(JdbcConfig config) {
super(config);
}
@ -40,36 +45,43 @@ public class JdbcInventory extends JdbcHelper implements Inventory {
@Override
public List<InventoryVector> getInventory(long... streams) {
List<InventoryVector> result = new LinkedList<>();
try (Connection connection = config.getConnection()) {
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT hash FROM Inventory WHERE expires > " + now() +
" AND stream IN (" + join(streams) + ")");
while (rs.next()) {
result.add(new InventoryVector(rs.getBytes("hash")));
}
} catch (SQLException e) {
LOG.error(e.getMessage(), e);
for (long stream : streams) {
getCache(stream).entrySet().stream()
.filter(e -> e.getValue() > now())
.forEach(e -> result.add(e.getKey()));
}
return result;
}
private List<InventoryVector> getFullInventory(long... streams) {
List<InventoryVector> result = new LinkedList<>();
try (Connection connection = config.getConnection()) {
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT hash FROM Inventory WHERE stream IN (" + join(streams) + ")");
while (rs.next()) {
result.add(new InventoryVector(rs.getBytes("hash")));
private Map<InventoryVector, Long> getCache(long stream) {
Map<InventoryVector, Long> result = cache.get(stream);
if (result == null) {
synchronized (cache) {
if (cache.get(stream) == null) {
result = new ConcurrentHashMap<>();
cache.put(stream, result);
try (Connection connection = config.getConnection()) {
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT hash, expires FROM Inventory WHERE expires > "
+ now(-5 * MINUTE) + " AND stream = " + stream);
while (rs.next()) {
result.put(new InventoryVector(rs.getBytes("hash")), rs.getLong("expires"));
}
} catch (SQLException e) {
LOG.error(e.getMessage(), e);
}
}
}
} catch (SQLException e) {
LOG.error(e.getMessage(), e);
}
return result;
}
@Override
public List<InventoryVector> getMissing(List<InventoryVector> offer, long... streams) {
offer.removeAll(getFullInventory(streams));
for (long stream : streams) {
getCache(stream).forEach((iv, t) -> offer.remove(iv));
}
return offer;
}
@ -131,6 +143,7 @@ public class JdbcInventory extends JdbcHelper implements Inventory {
ps.setLong(5, object.getType());
ps.setLong(6, object.getVersion());
ps.executeUpdate();
getCache(object.getStream()).put(iv, object.getExpiresTime());
} catch (SQLException e) {
LOG.debug("Error storing object of type " + object.getPayload().getClass().getSimpleName(), e);
} catch (Exception e) {
@ -140,28 +153,19 @@ public class JdbcInventory extends JdbcHelper implements Inventory {
@Override
public boolean contains(ObjectMessage object) {
try (Connection connection = config.getConnection()) {
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT count(1) FROM Inventory WHERE hash = X'"
+ object.getInventoryVector() + "'");
if (rs.next()) {
return rs.getInt(1) > 0;
} else {
throw new RuntimeException("Couldn't query if inventory contains " + object.getInventoryVector());
}
} catch (Exception e) {
LOG.error(e.getMessage(), e);
throw new RuntimeException(e);
}
return getCache(object.getStream()).entrySet().stream()
.anyMatch(x -> x.getKey().equals(object.getInventoryVector()));
}
@Override
public void cleanup() {
try (Connection connection = config.getConnection()) {
// We delete only objects that expired 5 minutes ago or earlier, so we don't request objects we just deleted
connection.createStatement().executeUpdate("DELETE FROM Inventory WHERE expires < " + (now() - 300));
connection.createStatement().executeUpdate("DELETE FROM Inventory WHERE expires < " + now(-5 * MINUTE));
} catch (SQLException e) {
LOG.debug(e.getMessage(), e);
}
for (Map<InventoryVector, Long> c : cache.values()) {
c.entrySet().removeIf(e -> e.getValue() < now(-5 * MINUTE));
}
}
}