Examples of io.netty.channel.ChannelFuture

io.netty.channel.ChannelFuture
- NEVER DO THIS {@code @Override}public void messageReceived( {@link ChannelHandlerContext} ctx, GoodByeMessage msg) {{@link ChannelFuture} future = ctx.channel().close();future.awaitUninterruptibly(); // Perform post-closure operation // ... } // GOOD {@code @Override}public void messageReceived( {@link ChannelHandlerContext} ctx, GoodByeMessage msg) {{@link ChannelFuture} future = ctx.channel().close();future.addListener(new {@link ChannelFutureListener}() { public void operationComplete( {@link ChannelFuture} future) {// Perform post-closure operation // ... } }); }
In spite of the disadvantages mentioned above, there are certainly the cases where it is more convenient to call {@link #await()}. In such a case, please make sure you do not call {@link #await()} in an I/O thread. Otherwise,{@link BlockingOperationException} will be raised to prevent a dead lock.
Do not confuse I/O timeout and await timeout
The timeout value you specify with {@link #await(long)}, {@link #await(long,TimeUnit)}, {@link #awaitUninterruptibly(long)}, or {@link #awaitUninterruptibly(long,TimeUnit)} are not related with I/Otimeout at all. If an I/O operation times out, the future will be marked as 'completed with failure,' as depicted in the diagram above. For example, connect timeout should be configured via a transport-specific option:
```
 // BAD - NEVER DO THIS {@link Bootstrap} b = ...;{@link ChannelFuture} f = b.connect(...);f.awaitUninterruptibly(10, TimeUnit.SECONDS); if (f.isCancelled()) { // Connection attempt cancelled by user } else if (!f.isSuccess()) { // You might get a NullPointerException here because the future // might not be completed yet. f.getCause().printStackTrace(); } else { // Connection established successfully } // GOOD {@link Bootstrap} b = ...;// Configure the connect timeout option. b.setOption( {@link ChannelOption}.CONNECT_TIMEOUT_MILLIS, 10000); {@link ChannelFuture} f = b.connect(...);f.awaitUninterruptibly(); // Now we are sure the future is completed. assert f.isDone(); if (f.isCancelled()) { // Connection attempt cancelled by user } else if (!f.isSuccess()) { f.getCause().printStackTrace(); } else { // Connection established successfully } 
```

                ch.pipeline().addLast("handler",new MessageHandler(server,allClientChannels));
            }
        });


        // Bind and start to accept incoming connections.
        ChannelFuture f = b.bind(port).sync();


        serverChannel = f.channel();


        logger.info("Netty server started on port "+port);


        // Wait until the server socket is closed.
        //serverChannel.closeFuture().sync();

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    @Test
    public void nodeStartsMinConnections() throws InterruptedException, UnknownHostException
    {
        final int MIN_CONNECTIONS = 5;


        ChannelFuture future = mock(ChannelFuture.class);
        Channel c = mock(Channel.class);
        Bootstrap bootstrap = PowerMockito.spy(new Bootstrap());


        doReturn(future).when(c).closeFuture();
        doReturn(true).when(c).isOpen();

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    @Test
    public void NodeRespectsMax() throws InterruptedException, UnknownHostException, Exception
    {
        final int MAX_CONNECTIONS = 2;


        ChannelFuture future = mock(ChannelFuture.class);
        Channel c = mock(Channel.class);
        Bootstrap bootstrap = PowerMockito.spy(new Bootstrap());


        doReturn(future).when(c).closeFuture();
        doReturn(true).when(c).isOpen();

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    @Test
    public void channelsReturnedCorrectly() throws InterruptedException, UnknownHostException, Exception
    {
        final int MAX_CONNECTIONS = 1;


        ChannelFuture future = mock(ChannelFuture.class);
        Channel c = mock(Channel.class);
        Bootstrap bootstrap = PowerMockito.spy(new Bootstrap());


        doReturn(future).when(c).closeFuture();
        doReturn(true).when(c).isOpen();

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    @Test
    public void healthCheckChangesState()
        throws InterruptedException, UnknownHostException, Exception
    {
        ChannelFuture future = mock(ChannelFuture.class);
        Channel c = mock(Channel.class);
        Bootstrap bootstrap = PowerMockito.spy(new Bootstrap());


        doReturn(future).when(c).closeFuture();
        doReturn(true).when(c).isOpen();

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    @Test
    public void idleReaperTest() throws InterruptedException, UnknownHostException, Exception
    {


        ChannelFuture future = mock(ChannelFuture.class);
        Channel c = mock(Channel.class);
        Bootstrap bootstrap = PowerMockito.spy(new Bootstrap());


        doReturn(future).when(c).closeFuture();
        doReturn(true).when(c).isOpen();

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    @Test
    public void nodeExecutesOperation() throws InterruptedException, UnknownHostException
    {
        Channel channel = mock(Channel.class);
        ChannelPipeline channelPipeline = mock(ChannelPipeline.class);
        ChannelFuture future = mock(ChannelFuture.class);
        FutureOperation operation = PowerMockito.spy(new FutureOperationImpl());
        RiakMessage response = PowerMockito.mock(RiakMessage.class);
        Bootstrap bootstrap = PowerMockito.spy(new Bootstrap());


        doReturn(future).when(channel).closeFuture();

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    @Test
    public void nodeFailsOperation() throws InterruptedException, UnknownHostException
    {
        Channel channel = mock(Channel.class);
        ChannelPipeline channelPipeline = mock(ChannelPipeline.class);
        ChannelFuture future = mock(ChannelFuture.class);
        FutureOperation operation = PowerMockito.spy(new FutureOperationImpl());
        Throwable t = mock(Throwable.class);
        Bootstrap bootstrap = PowerMockito.spy(new Bootstrap());


        doReturn(future).when(channel).closeFuture();

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    final WebSocketServerHandler webSocketHandler = new WebSocketServerHandler(svc);


    try {
      final NioEventLoopGroup bossGroup = new NioEventLoopGroup();
      final NioEventLoopGroup workerGroup = new NioEventLoopGroup();
      final ChannelFuture channelFuture = bootstrap.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
              .childHandler(new ChannelInitializer() {
                @Override
                protected void initChannel(Channel ch) throws Exception {
                  if (useSecureWebSocket) {
                    final SslHandler sslHandler = SslHandlerFactory.buildSslHandler(esc);
                    ch.pipeline().addLast("ssl", sslHandler);
                  }
                  ch.pipeline().addLast("codec-http", new HttpServerCodec());
                  ch.pipeline().addLast("aggregator", new HttpObjectAggregator(65536));
                  ch.pipeline().addLast("handler", webSocketHandler);
                }


              }).bind(port).sync();


      svc.addShutdownHook(new Runnable() {
        @Override
        public void run() {
          try {
            webSocketHandler.stop();
            channelFuture.channel().close();
            log.info("web socket server stopped.");
          } 
          catch (Exception e) {
            throw new RuntimeException(e);
          }

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                config.webSocketProtocolCSV(), false);
        handshaker = wsFactory.newHandshaker(req);
        if (handshaker == null) {
            WebSocketServerHandshakerFactory.sendUnsupportedWebSocketVersionResponse(ctx.channel());
        } else {
            final ChannelFuture handshakeFuture = handshaker.handshake(ctx.channel(), req);
            handshakeFuture.addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(final ChannelFuture future) throws Exception {
                    if (future.isSuccess()) {
                        ctx.pipeline().remove(SockJsHandler.class);
                        ctx.pipeline().remove(CorsInboundHandler.class);

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Examples of io.netty.channel.ChannelFuture

Do not confuse I/O timeout and await timeout

Related Classes of io.netty.channel.ChannelFuture