Examples of org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory

Package org.jboss.netty.channel.socket.nio

Examples of org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory

org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory
A {@link ServerSocketChannelFactory} which creates a server-side NIO-based{@link ServerSocketChannel}. It utilizes the non-blocking I/O mode which was introduced with NIO to serve many number of concurrent connections efficiently.
How threads work

There are two types of threads in a {@link NioServerSocketChannelFactory}; one is boss thread and the other is worker thread.
Boss threads

Each bound {@link ServerSocketChannel} has its own boss thread.For example, if you opened two server ports such as 80 and 443, you will have two boss threads. A boss thread accepts incoming connections until the port is unbound. Once a connection is accepted successfully, the boss thread passes the accepted {@link Channel} to one of the workerthreads that the {@link NioServerSocketChannelFactory} manages.
Worker threads

One {@link NioServerSocketChannelFactory} can have one or more workerthreads. A worker thread performs non-blocking read and write for one or more {@link Channel}s in a non-blocking mode.
Life cycle of threads and graceful shutdown

All threads are acquired from the {@link Executor}s which were specified when a {@link NioServerSocketChannelFactory} was created. Boss threads areacquired from the {@code bossExecutor}, and worker threads are acquired from the {@code workerExecutor}. Therefore, you should make sure the specified {@link Executor}s are able to lend the sufficient number of threads. It is the best bet to specify {@linkplain Executors#newCachedThreadPool() a cached thread pool}.
Both boss and worker threads are acquired lazily, and then released when there's nothing left to process. All the related resources such as {@link Selector} are also released when the boss and worker threads arereleased. Therefore, to shut down a service gracefully, you should do the following:
1. unbind all channels created by the factory,
2. close all child channels accepted by the unbound channels, and
3. call {@link #releaseExternalResources()}.
Please make sure not to shut down the executor until all channels are closed. Otherwise, you will end up with a {@link RejectedExecutionException}and the related resources might not be released properly. @author The Netty Project (netty-dev@lists.jboss.org) @author Trustin Lee (tlee@redhat.com) @version $Rev: 536 $, $Date: 2008-11-28 20:18:21 +0900 (Fri, 28 Nov 2008) $ @apiviz.landmark

  public void start() {
    logger.info("Starting {}...", this);


    Responder responder = new SpecificResponder(AvroSourceProtocol.class, this);


    NioServerSocketChannelFactory socketChannelFactory = initSocketChannelFactory();


    ChannelPipelineFactory pipelineFactory = initChannelPipelineFactory();


    server = new NettyServer(responder, new InetSocketAddress(bindAddress, port),
          socketChannelFactory, pipelineFactory, null);

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    logger.info("Avro source {} started.", getName());
  }


  private NioServerSocketChannelFactory initSocketChannelFactory() {
    NioServerSocketChannelFactory socketChannelFactory;
    if (maxThreads <= 0) {
      socketChannelFactory = new NioServerSocketChannelFactory
          (Executors .newCachedThreadPool(), Executors.newCachedThreadPool());
    } else {
      socketChannelFactory = new NioServerSocketChannelFactory(
          Executors.newCachedThreadPool(),
          Executors.newFixedThreadPool(maxThreads));
    }
    return socketChannelFactory;
  }

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        handler);
    Server server;
    if (enableCompression) {
      server = new NettyServer(responder,
          new InetSocketAddress(localhost, port),
          new NioServerSocketChannelFactory
          (Executors .newCachedThreadPool(), Executors.newCachedThreadPool()),
          new CompressionChannelPipelineFactory(), null);
    } else {
      server = new NettyServer(responder,
        new InetSocketAddress(localhost, port));

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  private Server createSslServer(AvroSourceProtocol protocol)
      throws IllegalAccessException, InstantiationException {
    Server server = new NettyServer(new SpecificResponder(
        AvroSourceProtocol.class, protocol), new InetSocketAddress(hostname, port),
            new NioServerSocketChannelFactory(
                    Executors.newCachedThreadPool(),
                    Executors.newCachedThreadPool()),
            new SSLChannelPipelineFactory(),
            null);

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      .build();
    ThreadFactory workerFactory = new ThreadFactoryBuilder()
      .setNameFormat("ShuffleHandler Netty Worker #%d")
      .build();
    
    selector = new NioServerSocketChannelFactory(
        Executors.newCachedThreadPool(bossFactory),
        Executors.newCachedThreadPool(workerFactory));
    super.serviceInit(new Configuration(conf));
  }

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      .build();
    ThreadFactory workerFactory = new ThreadFactoryBuilder()
      .setNameFormat("ShuffleHandler Netty Worker #%d")
      .build();
    
    selector = new NioServerSocketChannelFactory(
        Executors.newCachedThreadPool(bossFactory),
        Executors.newCachedThreadPool(workerFactory));
    super.init(new Configuration(conf));
  }

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    /**
     * {@inheritDoc}
     */
    public void start(int port) throws IOException {
        factory = new NioServerSocketChannelFactory();
        ServerBootstrap bootstrap = new ServerBootstrap(factory);
        bootstrap.setOption("receiveBufferSize", 128 * 1024);
        bootstrap.setOption("tcpNoDelay", true);
        bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
            public ChannelPipeline getPipeline() throws Exception {

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                configuration.getCorePoolSize(), configuration.getMaxPoolSize());
        ExecutorService workerExecutor = context.getExecutorServiceManager().newThreadPool(this, "NettyTCPWorker",
                configuration.getCorePoolSize(), configuration.getMaxPoolSize());


        if (configuration.getWorkerCount() == 0) {
            channelFactory = new NioServerSocketChannelFactory(bossExecutor, workerExecutor);
        } else {
            channelFactory = new NioServerSocketChannelFactory(bossExecutor, workerExecutor,
                                                               configuration.getWorkerCount());
        }
        serverBootstrap = new ServerBootstrap(channelFactory);
        if (configuration.getServerPipelineFactory() != null) {
            configuration.getServerPipelineFactory().setConsumer(this);

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            return;
        }


        // Configure the server.
        executionHandler = new ExecutionHandler(new RequestThreadPoolExecutor());
        factory = new NioServerSocketChannelFactory(Executors.newCachedThreadPool(), Executors.newCachedThreadPool());
        ServerBootstrap bootstrap = new ServerBootstrap(factory);


        bootstrap.setOption("child.tcpNoDelay", true);


        // Set up the event pipeline factory.

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      .build();
    ThreadFactory workerFactory = new ThreadFactoryBuilder()
      .setNameFormat("ShuffleHandler Netty Worker #%d")
      .build();
    
    selector = new NioServerSocketChannelFactory(
        Executors.newCachedThreadPool(bossFactory),
        Executors.newCachedThreadPool(workerFactory));
    super.init(new Configuration(conf));
  }

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Examples of org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory

How threads work

Boss threads

Worker threads

Life cycle of threads and graceful shutdown

Related Classes of org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory