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 static void initializeConnections() throws Exception {
    // start server
    System.out.println("starting server...");
    mailService = new MailImpl();
    Responder responder = new SpecificResponder(Mail.class, mailService);
    ChannelFactory channelFactory = new NioServerSocketChannelFactory(
        Executors.newCachedThreadPool(),
        Executors.newCachedThreadPool()
    );
    server = new NettyServer(responder, new InetSocketAddress(0),
                             channelFactory, new SSLChannelPipelineFactory(),

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          .build();
      ThreadFactory workerFactory = new ThreadFactoryBuilder()
          .setNameFormat("PullServerAuxService Netty Worker #%d")
          .build();


      selector = new NioServerSocketChannelFactory(
          Executors.newCachedThreadPool(bossFactory),
          Executors.newCachedThreadPool(workerFactory));


      localFS = new LocalFileSystem();
      super.init(new Configuration(conf));

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          .build();
      ThreadFactory workerFactory = new ThreadFactoryBuilder()
          .setNameFormat("PullServerAuxService Netty Worker #%d")
          .build();


      selector = new NioServerSocketChannelFactory(
          Executors.newCachedThreadPool(bossFactory),
          Executors.newCachedThreadPool(workerFactory));


      localFS = new LocalFileSystem();
      super.init(new Configuration(conf));

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  private ChannelGroup channelGroup = null;


  public HttpDataServer(final InetSocketAddress addr, 
      final DataRetriever retriever) {
    this.addr = addr;
    this.factory = new NioServerSocketChannelFactory(
        Executors.newCachedThreadPool(), Executors.newCachedThreadPool(),
        Runtime.getRuntime().availableProcessors() * 2);


    // Configure the server.
    this.bootstrap = new ServerBootstrap(factory);

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        // Configure the server.
        int buffer_size = Utils.getInt(storm_conf.get(Config.STORM_MESSAGING_NETTY_BUFFER_SIZE));
        int maxWorkers = Utils.getInt(storm_conf.get(Config.STORM_MESSAGING_NETTY_SERVER_WORKER_THREADS));


        if (maxWorkers > 0) {
            factory = new NioServerSocketChannelFactory(Executors.newCachedThreadPool(), Executors.newCachedThreadPool(), maxWorkers);
        } else {
            factory = new NioServerSocketChannelFactory(Executors.newCachedThreadPool(), Executors.newCachedThreadPool());
        }
        bootstrap = new ServerBootstrap(factory);
        bootstrap.setOption("child.tcpNoDelay", true);
        bootstrap.setOption("child.receiveBufferSize", buffer_size);
        bootstrap.setOption("child.keepAlive", true);

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  }


  private ServerBootstrap startHttpServer(int port,
      final Token<DelegationTokenIdentifier> token, final URI url) {
    ServerBootstrap bootstrap = new ServerBootstrap(
        new NioServerSocketChannelFactory(Executors.newCachedThreadPool(),
            Executors.newCachedThreadPool()));


    bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
      @Override
      public ChannelPipeline getPipeline() throws Exception {

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

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public class RpcServer extends RpcPeer {


    ServerBootstrap bootstrap;


    public RpcServer() {
        ChannelFactory channelFactory = new NioServerSocketChannelFactory(
                Executors.newCachedThreadPool(),
                Executors.newCachedThreadPool());
        bootstrap = new ServerBootstrap(channelFactory);
        bootstrap.setPipelineFactory(new RpcChannelPiplineFactory(this));
    }

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         else
         {
            threadsToUse = this.nioRemotingThreads;
         }


         channelFactory = new NioServerSocketChannelFactory(bossExecutor, workerExecutor, threadsToUse);
      }
      else
      {
         channelFactory = new OioServerSocketChannelFactory(bossExecutor, workerExecutor);
      }

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    @Override
    protected void startInner() {


        // Configure the server.
        this.workerPool = (ThreadPoolExecutor) Executors.newFixedThreadPool(config.getNumRestServiceNettyWorkerThreads());
        this.bootstrap = new ServerBootstrap(new NioServerSocketChannelFactory(Executors.newFixedThreadPool(config.getNumRestServiceNettyBossThreads()),
                                                                               workerPool));
        this.bootstrap.setOption("backlog", config.getRestServiceNettyServerBacklog());
        this.bootstrap.setOption("child.tcpNoDelay", true);
        this.bootstrap.setOption("child.keepAlive", true);
        this.bootstrap.setOption("child.reuseAddress", true);

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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