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

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

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

org.jboss.netty.channel.socket.nio.NioDatagramChannelFactory
A {@link DatagramChannelFactory} that creates a NIO-based connectionless{@link DatagramChannel}. 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 is only one thread type in a {@link NioDatagramChannelFactory}; worker threads.
Worker threads

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

All worker threads are acquired from the {@link Executor} which was specifiedwhen a {@link NioDatagramChannelFactory} was created. Therefore, you shouldmake sure the specified {@link Executor} is able to lend the sufficientnumber of threads. It is the best bet to specify {@linkplain Executors#newCachedThreadPool() a cached thread pool}.
All 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 worker threads are released. Therefore, to shut down a service gracefully, you should do the following:
1. close all channels created by the factory usually using {@link ChannelGroup#close()}, 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.
Limitation

Multicast is not supported. Please use {@link OioDatagramChannelFactory}instead. @author The Netty Project (netty-dev@lists.jboss.org) @author Trustin Lee (tlee@redhat.com) @author Daniel Bevenius (dbevenius@jboss.com) @version $Rev: 1580 $, $Date: 2009-07-17 21:49:32 +0900 (Fri, 17 Jul 2009) $ @apiviz.landmark

        configureThreadPool(getWorkerExecutorName(), workerExecutor);


        if (receiveExecutor != null)
            configureThreadPool(getReceiveExecutorName(), receiveExecutor);


        this.channelFactory = isSendToServerInsteadOfMulticast() ? new NioDatagramChannelFactory(workerExecutor) : new OioDatagramChannelFactory(workerExecutor);
        this.bootstrap = new ConnectionlessBootstrap(channelFactory);
        this.bootstrap.setOption("receiveBufferSizePredictorFactory", new FixedReceiveBufferSizePredictorFactory(4096));


        bootstrap.setPipelineFactory(new UdpMessagePipelineFactory(LOG, new ChannelNodeAddressResolver(addressResolver), receiveExecutor) {

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            @ChannelFactoryResource Executor executor) {
        super(executor);
    }


    public NioDatagramChannelFactory get() {
        return new NioDatagramChannelFactory(executor);
    }

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    /**
     * {@inheritDoc}
     */
    public void start(int port) throws IOException {
        factory = new NioDatagramChannelFactory();
        ConnectionlessBootstrap bootstrap = new ConnectionlessBootstrap(factory);
        bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
            public ChannelPipeline getPipeline() throws Exception {
                return Channels.pipeline(new SimpleChannelUpstreamHandler() {
                    @Override

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                LocalServerChannelFactory.class);


        // Miscellaneous transports
        register(ctx, new OioClientSocketChannelFactory(executor));
        register(ctx, new OioServerSocketChannelFactory(executor, executor));
        register(ctx, new NioDatagramChannelFactory(executor));
    }

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        return channelFactory;
    }
    
    public static DatagramChannelFactory getDatagramFactory() {
        if (datagramChannelFactory == null) {
            datagramChannelFactory = new NioDatagramChannelFactory();
        }
        return datagramChannelFactory;
    }

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    @Inject
    private NetworkChannel(NetworkSettings settings, Provider<MessageHandler> handler) {
        this.handler = handler;


        bootstrap = new ClientBootstrap(new NioDatagramChannelFactory(
                Executors.newSingleThreadExecutor()));
        bootstrap.setPipelineFactory(pipelineFactory);


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

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    protected void setupUDPCommunication() throws Exception {
        if (datagramChannelFactory == null) {
            int count = configuration.getWorkerCount() > 0 ? configuration.getWorkerCount() : NettyHelper.DEFAULT_IO_THREADS;
            workerPool = new NioDatagramWorkerPool(Executors.newCachedThreadPool(), count);
            datagramChannelFactory = new NioDatagramChannelFactory(workerPool);
        }
    }

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    protected void setupUDPCommunication() throws Exception {
        if (datagramChannelFactory == null) {
            ExecutorService workerExecutor = context.getExecutorServiceStrategy().newThreadPool(this, "NettyUDPWorker",
                    configuration.getCorePoolSize(), configuration.getMaxPoolSize());
            datagramChannelFactory = new NioDatagramChannelFactory(workerExecutor);
        }
    }

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    private void initializeUDPServerSocketCommunicationLayer() throws Exception {
        ExecutorService workerExecutor = context.getExecutorServiceStrategy().newThreadPool(this, "NettyUDPWorker",
                configuration.getCorePoolSize(), configuration.getMaxPoolSize());


        datagramChannelFactory = new NioDatagramChannelFactory(workerExecutor);
        connectionlessServerBootstrap = new ConnectionlessBootstrap(datagramChannelFactory);
        if (configuration.getServerPipelineFactory() != null) {
            configuration.getServerPipelineFactory().setConsumer(this);
            connectionlessServerBootstrap.setPipelineFactory(configuration.getServerPipelineFactory());
        } else {

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    }


    protected void setupUDPCommunication() throws Exception {
        if (datagramChannelFactory == null) {
            workerExecutor = context.getExecutorServiceManager().newCachedThreadPool(this, "NettyUDPWorker");
            datagramChannelFactory = new NioDatagramChannelFactory(workerExecutor);
        }
    }

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

How threads work

Worker threads

Life cycle of threads and graceful shutdown

Limitation

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