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

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

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

org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory
A {@link ClientSocketChannelFactory} which creates a client-side NIO-based{@link SocketChannel}. 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 NioClientSocketChannelFactory}; one is boss thread and the other is worker thread.
Boss thread

One {@link NioClientSocketChannelFactory} has one boss thread. It makesa connection attempt on request. Once a connection attempt succeeds, the boss thread passes the connected {@link Channel} to one of the workerthreads that the {@link NioClientSocketChannelFactory} manages.
Worker threads

One {@link NioClientSocketChannelFactory} 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 NioClientSocketChannelFactory} was created. A boss thread isacquired 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. close all channels created by the factory, and
2. 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 void runAsyncClients(SocketAddress server, int nClients, int nSelectors)
            throws Exception {
        ChannelFactory channelFactory = new NioClientSocketChannelFactory(
                Executors.newCachedThreadPool(),
                Executors.newCachedThreadPool(),
                nSelectors);
        allConnected = new CountDownLatch(nClients);
        allFinished = new CountDownLatch(nClients);

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    ClientBootstrap bootstrap;
    private volatile RpcChannel rpcChannel;


    public RpcClient() {
        ChannelFactory channelFactory = new NioClientSocketChannelFactory(
                Executors.newCachedThreadPool(),
                Executors.newCachedThreadPool());


        bootstrap = new ClientBootstrap(channelFactory);
        bootstrap.setPipelineFactory(new RpcChannelPiplineFactory(this));

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    {
      this.channelFactory = channelFactory;
    }
    else
    {
      this.channelFactory = new NioClientSocketChannelFactory(boss,
          worker);
    }
    this.bootstrap = new ClientBootstrap(this.channelFactory);
    // At client side option is tcpNoDelay and at server child.tcpNoDelay
    this.bootstrap.setOption("tcpNoDelay", true);

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    {
      this.channelFactory = channelFactory;
    }
    else
    {
      this.channelFactory = new NioClientSocketChannelFactory(boss,
          worker);
    }
    this.bootstrap = new ClientBootstrap(this.channelFactory);
    // At client side option is tcpNoDelay and at server child.tcpNoDelay
    this.bootstrap.setOption("tcpNoDelay", true);

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  }


  @Override
  protected void startUp() throws Exception {
    executionHandler = new ExecutionHandler(new OrderedMemoryAwareThreadPoolExecutor(4, 0, 0));
    bootstrap = new ClientBootstrap(new NioClientSocketChannelFactory(Executors.newCachedThreadPool(), Executors.newCachedThreadPool()));
    bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
      @Override
      public ChannelPipeline getPipeline() throws Exception {
        final ChannelPipeline pipeline = Channels.pipeline();

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      Configuration conf = HBaseConfiguration.create();
      conf.set("tso.host", "localhost");
      conf.setInt("tso.port", 1234);


      // Start client with Nb of active threads = 3 as maximum.
      channelFactory = new NioClientSocketChannelFactory(Executors.newCachedThreadPool(),
            Executors.newCachedThreadPool(), 3);
      // Create the bootstrap
      // Create the global ChannelGroup
      channelGroup = new DefaultChannelGroup(TransactionClient.class.getName());
      // Create the associated Handler

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               if(nioBossPool == null)
               {
                  //only used for connect so 1 will do
                  nioBossPool = new NioClientBossPool(virtualExecutor, 1);
               }
               channelFactory = new NioClientSocketChannelFactory(nioBossPool, nioWorkerPool);
               nioChannelFactoryCount.incrementAndGet();
            }
         }
         else
         {
            channelFactory = new NioClientSocketChannelFactory(virtualExecutor, virtualExecutor, threadsToUse);
         }


      }
      else
      {

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  }
  
  public StrestClient(String host, ExecutorService threadPool) {
    this.host = host;
        bootstrap = new ClientBootstrap(
                new NioClientSocketChannelFactory(
                    threadPool,
                        threadPool));
    
  }

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        if (channelFactory == null) {
            ExecutorService bossExecutor = context.getExecutorServiceStrategy().newThreadPool(this, "NettyTCPBoss",
                    configuration.getCorePoolSize(), configuration.getMaxPoolSize());
            ExecutorService workerExecutor = context.getExecutorServiceStrategy().newThreadPool(this, "NettyTCPWorker",
                    configuration.getCorePoolSize(), configuration.getMaxPoolSize());
            channelFactory = new NioClientSocketChannelFactory(bossExecutor, workerExecutor);
        }
    }

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  private Protocol remote;


  NettyTransceiver() {}
  
  public NettyTransceiver(InetSocketAddress addr) {
    this(addr, new NioClientSocketChannelFactory(Executors.
        newCachedThreadPool(), Executors.newCachedThreadPool()));
  }

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

How threads work

Boss thread

Worker threads

Life cycle of threads and graceful shutdown

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