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

         else
         {
            threadsToUse = this.nioRemotingThreads;
         }


         channelFactory = new NioClientSocketChannelFactory(virtualExecutor, virtualExecutor, threadsToUse);
      }
      else
      {
         channelFactory = new OioClientSocketChannelFactory(virtualExecutor);
      }

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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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         else
         {
            threadsToUse = this.nioRemotingThreads;
         }


         channelFactory = new NioClientSocketChannelFactory(virtualExecutor, virtualExecutor, threadsToUse);
      }
      else
      {
         channelFactory = new OioClientSocketChannelFactory(virtualExecutor);
      }

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         else
         {
            threadsToUse = this.nioRemotingThreads;
         }


         channelFactory = new NioClientSocketChannelFactory(virtualExecutor, virtualExecutor, threadsToUse);
      }
      else
      {
         channelFactory = new OioClientSocketChannelFactory(virtualExecutor);
      }

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         else
         {
            threadsToUse = this.nioRemotingThreads;
         }


         channelFactory = new NioClientSocketChannelFactory(virtualExecutor, virtualExecutor, threadsToUse);
      }
      else
      {
         channelFactory = new OioClientSocketChannelFactory(virtualExecutor);
      }

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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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  public void init(InetSocketAddress addr, ChannelPipelineFactory pipeFactory) {
    this.addr = addr;


    this.factory =
        new NioClientSocketChannelFactory(Executors.newCachedThreadPool(),
            Executors.newCachedThreadPool());


    this.bootstrap = new ClientBootstrap(factory);
    this.bootstrap.setPipelineFactory(pipeFactory);
    // TODO - should be configurable

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    }
  }


  public File get() throws IOException {
    ClientBootstrap bootstrap = new ClientBootstrap(
        new NioClientSocketChannelFactory(Executors.newCachedThreadPool(),
            Executors.newCachedThreadPool()));
    bootstrap.setOption("connectTimeoutMillis", 5000L); // set 5 sec
    bootstrap.setOption("receiveBufferSize", 1048576); // set 1M
    ChannelPipelineFactory factory = new HttpClientPipelineFactory(file);
    bootstrap.setPipelineFactory(factory);

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        base_sleep_ms = Utils.getInt(storm_conf.get(Config.STORM_MESSAGING_NETTY_MIN_SLEEP_MS));
        max_sleep_ms = Utils.getInt(storm_conf.get(Config.STORM_MESSAGING_NETTY_MAX_SLEEP_MS));
        int maxWorkers = Utils.getInt(storm_conf.get(Config.STORM_MESSAGING_NETTY_CLIENT_WORKER_THREADS));


        if (maxWorkers > 0) {
            factory = new NioClientSocketChannelFactory(Executors.newCachedThreadPool(), Executors.newCachedThreadPool(), maxWorkers);
        } else {
            factory = new NioClientSocketChannelFactory(Executors.newCachedThreadPool(), Executors.newCachedThreadPool());
        }
        bootstrap = new ClientBootstrap(factory);
        bootstrap.setOption("tcpNoDelay", true);
        bootstrap.setOption("sendBufferSize", buffer_size);
        bootstrap.setOption("keepAlive", true);

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    }


    @SuppressWarnings("unused")
    private static void runSyncClients(InetSocketAddress server, int nClients, int nSelectors)
            throws InterruptedException {
        ChannelFactory channelFactory = new NioClientSocketChannelFactory(
                Executors.newCachedThreadPool(),
                Executors.newCachedThreadPool(),
                nSelectors);
        allConnected = new CountDownLatch(nClients);
        startLatch = new CountDownLatch(1);

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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