public static void shutdown() {
logger_.info("Shutting down ...");
synchronized (MessagingService.class) {
/* Stop listening on any socket */
for (SelectionKey skey : listenSockets_.values()) {
SelectorManager.getSelectorManager().cancel(skey);
}
listenSockets_.clear();
/* Shutdown the threads in the EventQueue's */
messageDeserializationExecutor_.shutdownNow();
messageSerializerExecutor_.shutdownNow();
messageDeserializerExecutor_.shutdownNow();
streamExecutor_.shutdownNow();
/* shut down the cachetables */
taskCompletionMap_.shutdown();
callbackMap_.shutdown();
/* Interrupt the selector manager thread */
SelectorManager.getSelectorManager().interrupt();
poolTable_.clear();
verbHandlers_.clear();
bShutdown_ = true;
}
logger_.debug("Shutdown invocation complete.");
}
protected MessagingService() {
for (ReservedVerbs_ verbs : ReservedVerbs_.values()) {
reservedVerbs_.put(verbs.toString(), verbs.toString());
}
verbHandlers_ = new HashMap<String, IVerbHandler>();
endPoints_ = new HashSet<EndPoint>();
/*
* Leave callbacks in the cachetable long enough that any related messages will arrive
* before the callback is evicted from the table. The concurrency level is set at 128
* which is the sum of the threads in the pool that adds shit into the table and the
* pool that retrives the callback from here.
*/
int maxSize = MessagingConfig.getMessagingThreadCount();
callbackMap_ = new Cachetable<String, IAsyncCallback>(2 * DatabaseDescriptor.getRpcTimeout());
taskCompletionMap_ =
new Cachetable<String, IAsyncResult>(2 * DatabaseDescriptor.getRpcTimeout());
messageDeserializationExecutor_ =
new DebuggableThreadPoolExecutor(
maxSize,
maxSize,
Integer.MAX_VALUE,
TimeUnit.SECONDS,
new LinkedBlockingQueue<Runnable>(),
new ThreadFactoryImpl("MESSAGING-SERVICE-POOL"));
messageSerializerExecutor_ =
new DebuggableThreadPoolExecutor(
maxSize,
maxSize,
Integer.MAX_VALUE,
TimeUnit.SECONDS,
new LinkedBlockingQueue<Runnable>(),
new ThreadFactoryImpl("MESSAGE-SERIALIZER-POOL"));
messageDeserializerExecutor_ =
new DebuggableThreadPoolExecutor(
maxSize,
maxSize,
Integer.MAX_VALUE,
TimeUnit.SECONDS,
new LinkedBlockingQueue<Runnable>(),
new ThreadFactoryImpl("MESSAGE-DESERIALIZER-POOL"));
streamExecutor_ =
new DebuggableThreadPoolExecutor(
1,
1,
Integer.MAX_VALUE,
TimeUnit.SECONDS,
new LinkedBlockingQueue<Runnable>(),
new ThreadFactoryImpl("MESSAGE-STREAMING-POOL"));
protocol_ = hash(HashingSchemes.MD5, "FB-MESSAGING".getBytes());
/* register the response verb handler */
registerVerbHandlers(MessagingService.responseVerbHandler_, new ResponseVerbHandler());
/* register stage for response */
StageManager.registerStage(
MessagingService.responseStage_, new MultiThreadedStage("RESPONSE-STAGE", maxSize));
}
public void deregisterAllVerbHandlers(EndPoint localEndPoint) {
Iterator keys = verbHandlers_.keySet().iterator();
String key = null;
/*
* endpoint specific verbhandlers can be distinguished because
* their key's contain the name of the endpoint.
*/
while (keys.hasNext()) {
key = (String) keys.next();
if (key.contains(localEndPoint.toString())) keys.remove();
}
}
public static TcpConnectionManager getConnectionPool(EndPoint from, EndPoint to) {
String key = from + ":" + to;
TcpConnectionManager cp = poolTable_.get(key);
if (cp == null) {
lock_.lock();
try {
cp = poolTable_.get(key);
if (cp == null) {
cp =
new TcpConnectionManager(
MessagingConfig.getConnectionPoolInitialSize(),
MessagingConfig.getConnectionPoolGrowthFactor(),
MessagingConfig.getConnectionPoolMaxSize(),
from,
to);
poolTable_.put(key, cp);
}
} finally {
lock_.unlock();
}
}
return cp;
}
public static ConnectionStatistics[] getPoolStatistics() {
Set<ConnectionStatistics> stats = new HashSet<ConnectionStatistics>();
Iterator<TcpConnectionManager> it = poolTable_.values().iterator();
while (it.hasNext()) {
TcpConnectionManager cp = it.next();
ConnectionStatistics cs =
new ConnectionStatistics(
cp.getLocalEndPoint(),
cp.getRemoteEndPoint(),
cp.getPoolSize(),
cp.getConnectionsInUse());
stats.add(cs);
}
return stats.toArray(new ConnectionStatistics[0]);
}
public void listen(EndPoint localEp, boolean isHttp) throws IOException {
ServerSocketChannel serverChannel = ServerSocketChannel.open();
ServerSocket ss = serverChannel.socket();
ss.bind(localEp.getInetAddress());
serverChannel.configureBlocking(false);
SelectionKeyHandler handler = null;
if (isHttp) {
handler = new HttpConnectionHandler();
} else {
handler = new TcpConnectionHandler(localEp);
}
SelectionKey key =
SelectorManager.getSelectorManager()
.register(serverChannel, handler, SelectionKey.OP_ACCEPT);
endPoints_.add(localEp);
listenSockets_.put(localEp, key);
}
public IVerbHandler getVerbHandler(String type) {
IVerbHandler handler = (IVerbHandler) verbHandlers_.get(type);
return handler;
}
public void deregisterVerbHandlers(String type) {
verbHandlers_.remove(type);
}
public void registerVerbHandlers(String type, IVerbHandler verbHandler) {
checkForReservedVerb(type);
verbHandlers_.put(type, verbHandler);
}
private void checkForReservedVerb(String type) {
if (reservedVerbs_.get(type) != null && verbHandlers_.get(type) != null) {
throw new IllegalArgumentException(type + " is a reserved verb handler. Scram!");
}
}
