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


    private static DuplexTcpServerBootstrap startProtoServer(int port) {
        PeerInfo serverInfo = new PeerInfo("0.0.0.0", port);
        DuplexTcpServerBootstrap bootstrap = new DuplexTcpServerBootstrap(
                serverInfo,
                new NioServerSocketChannelFactory(
                        Executors.newCachedThreadPool(),
                        Executors.newCachedThreadPool())
        );
        ThreadPoolCallExecutor pool = new ThreadPoolCallExecutor(10, 10);
        bootstrap.setRpcServerCallExecutor(pool);

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    }


    @Override
    protected Bootstrap getBootstrap() {
        final ServerBootstrap bootstrap =
                new ServerBootstrap(new NioServerSocketChannelFactory(bossExecutor, workerExecutor));


        bootstrap.setOption("receiveBufferSizePredictorFactory", new FixedReceiveBufferSizePredictorFactory(8192));
        bootstrap.setOption("child.receiveBufferSize", getRecvBufferSize());


        return bootstrap;

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        return new InstrumentedThreadFactory(
                new ThreadFactoryBuilder().setNameFormat(nameFormat).build(), metricRegistry);
    }


    private static ServerBootstrap buildServerBootStrap(final ExecutorService bossExecutor, final ExecutorService workerExecutor) {
        return new ServerBootstrap(new NioServerSocketChannelFactory(bossExecutor, workerExecutor));
    }

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    private static DuplexTcpServerBootstrap startProtoServer(int port) {
        PeerInfo serverInfo = new PeerInfo("0.0.0.0", port);
        DuplexTcpServerBootstrap bootstrap = new DuplexTcpServerBootstrap(
                serverInfo,
                new NioServerSocketChannelFactory(
                        Executors.newCachedThreadPool(),
                        Executors.newCachedThreadPool())
        );
        bootstrap.setRpcServerCallExecutor(new ThreadPoolCallExecutor(10, 10));
        return bootstrap;

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  }
  
  public static void bootServer() {
    // More terse code to setup the server
    ServerBootstrap bootstrap = new ServerBootstrap(
        new NioServerSocketChannelFactory(
            Executors.newCachedThreadPool(),
            Executors.newCachedThreadPool()));


    // Set up the pipeline factory.
    bootstrap.setPipelineFactory(new ChannelPipelineFactory() {

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  public static void bootServer() {
    
    // More terse code to setup the server
    ServerBootstrap bootstrap = new ServerBootstrap(
        new NioServerSocketChannelFactory(
            Executors.newCachedThreadPool(),
            Executors.newCachedThreadPool()));


    // Set up the pipeline factory.
    bootstrap.setPipelineFactory(new ChannelPipelineFactory() {

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  public Bootstrap createServerBootstrap()
  {
    // TODO The thread pools should be injected from spring.
    serverBootstrap = new ServerBootstrap(
        new NioServerSocketChannelFactory(Executors
            .newCachedThreadPool(new NamedThreadFactory(
                "TCP-Server-Boss")), Executors
            .newCachedThreadPool(new NamedThreadFactory(
                "TCP-Server-Worker"))));

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  public Bootstrap createServerBootstrap()
  {
    // TODO The thread pools should be injected from spring.
    serverBootstrap = new ServerBootstrap(
        
        new NioServerSocketChannelFactory(Executors
            .newFixedThreadPool(1,new NamedThreadFactory(
                "Flash-Server-Boss")), Executors
            .newFixedThreadPool(1,new NamedThreadFactory(
                "Flash-Server-Worker"))));

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  public static synchronized void startupNettyServer(int httpPort) {
    if (nettyStarted)
      return;
    nettyStarted = true;
    ServerBootstrap server = new ServerBootstrap(
        new NioServerSocketChannelFactory(
            Executors.newCachedThreadPool(),
            Executors.newCachedThreadPool()));


    server.setPipelineFactory(new CountandraHttpServerPipelineFactory());
    server.bind(new InetSocketAddress(httpPort));

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        ThreadFactory bossFactory = new NettyRenameThreadFactory(name() + "-boss");
        ThreadFactory workerFactory = new NettyRenameThreadFactory(name() + "-worker");
        
        if (maxWorkers > 0) {
            factory = new NioServerSocketChannelFactory(Executors.newCachedThreadPool(bossFactory), 
                Executors.newCachedThreadPool(workerFactory), maxWorkers);
        } else {
            factory = new NioServerSocketChannelFactory(Executors.newCachedThreadPool(bossFactory), 
                Executors.newCachedThreadPool(workerFactory));
        }
        
        LOG.info("Create Netty Server " + name() + ", buffer_size: " + buffer_size + ", maxWorkers: " + maxWorkers);

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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