org.jboss.netty.channel.ChannelPipeline Java Examples

@Override
public void operationComplete(ChannelFuture future) throws Exception {
  if (!future.isSuccess()) {
    future.getChannel().close();
    return;
  }
  int waitCount = this.reduceContext.getMapsToWait().decrementAndGet();
  if (waitCount == 0) {
    metrics.operationComplete(future);
    // Let the idle timer handler close keep-alive connections
    if (reduceContext.getKeepAlive()) {
      ChannelPipeline pipeline = future.getChannel().getPipeline();
      TimeoutHandler timeoutHandler =
          (TimeoutHandler) pipeline.get(TIMEOUT_HANDLER);
      timeoutHandler.setEnabledTimeout(true);
    } else {
      future.getChannel().close();
    }
  } else {
    pipelineFact.getSHUFFLE().sendMap(reduceContext);
  }
}
 

@Override
public ChannelPipeline getPipeline() throws Exception {
    ChannelPipeline channelPipeline = Channels.pipeline();
    channelPipeline.addLast("openChannels", nettyTransport.serverOpenChannels);
    SizeHeaderFrameDecoder sizeHeader = new SizeHeaderFrameDecoder();
    if (nettyTransport.maxCumulationBufferCapacity != null) {
        if (nettyTransport.maxCumulationBufferCapacity.bytes() > Integer.MAX_VALUE) {
            sizeHeader.setMaxCumulationBufferCapacity(Integer.MAX_VALUE);
        } else {
            sizeHeader.setMaxCumulationBufferCapacity((int) nettyTransport.maxCumulationBufferCapacity.bytes());
        }
    }
    if (nettyTransport.maxCompositeBufferComponents != -1) {
        sizeHeader.setMaxCumulationBufferComponents(nettyTransport.maxCompositeBufferComponents);
    }
    channelPipeline.addLast("size", sizeHeader);
    channelPipeline.addLast("dispatcher", new MessageChannelHandler(nettyTransport, nettyTransport.logger, name));
    return channelPipeline;
}
 

@Override
protected void doOpen() throws Throwable {
    NettyHelper.setNettyLoggerFactory();
    bootstrap = new ClientBootstrap(channelFactory);
    // config
    // @see org.jboss.netty.channel.socket.SocketChannelConfig
    bootstrap.setOption("keepAlive", true);
    bootstrap.setOption("tcpNoDelay", true);
    bootstrap.setOption("connectTimeoutMillis", getTimeout());
    final NettyHandler nettyHandler = new NettyHandler(getUrl(), this);
    bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
        public ChannelPipeline getPipeline() {
            NettyCodecAdapter adapter = new NettyCodecAdapter(getCodec(), getUrl(), NettyClient.this);
            ChannelPipeline pipeline = Channels.pipeline();
            pipeline.addLast("decoder", adapter.getDecoder());
            pipeline.addLast("encoder", adapter.getEncoder());
            pipeline.addLast("handler", nettyHandler);
            return pipeline;
        }
    });
}
 

@Override
public ChannelPipeline getPipeline() throws Exception {
    ChannelPipeline channelPipeline = Channels.pipeline();
    SizeHeaderFrameDecoder sizeHeader = new SizeHeaderFrameDecoder();
    if (nettyTransport.maxCumulationBufferCapacity != null) {
        if (nettyTransport.maxCumulationBufferCapacity.bytes() > Integer.MAX_VALUE) {
            sizeHeader.setMaxCumulationBufferCapacity(Integer.MAX_VALUE);
        } else {
            sizeHeader.setMaxCumulationBufferCapacity((int) nettyTransport.maxCumulationBufferCapacity.bytes());
        }
    }
    if (nettyTransport.maxCompositeBufferComponents != -1) {
        sizeHeader.setMaxCumulationBufferComponents(nettyTransport.maxCompositeBufferComponents);
    }
    channelPipeline.addLast("size", sizeHeader);
    // using a dot as a prefix means, this cannot come from any settings parsed
    channelPipeline.addLast("dispatcher", new MessageChannelHandler(nettyTransport, nettyTransport.logger, ".client"));
    return channelPipeline;
}
 

/**
  * Starts the BGP peer.
  *
  * @param connectToSocket the socket to connect to
  */
 private void connect(InetSocketAddress connectToSocket)
     throws InterruptedException {

     ChannelFactory channelFactory =
         new NioClientSocketChannelFactory(
                 Executors.newCachedThreadPool(),
                 Executors.newCachedThreadPool());
     ChannelPipelineFactory pipelineFactory = () -> {
         ChannelPipeline pipeline = Channels.pipeline();
         pipeline.addLast("BgpPeerFrameDecoderTest",
                 peerFrameDecoder);
         pipeline.addLast("BgpPeerChannelHandlerTest",
                 peerChannelHandler);
         return pipeline;
     };

     peerBootstrap = new ClientBootstrap(channelFactory);
     peerBootstrap.setOption("child.keepAlive", true);
     peerBootstrap.setOption("child.tcpNoDelay", true);
     peerBootstrap.setPipelineFactory(pipelineFactory);
     peerBootstrap.connect(connectToSocket);
}
 

public void startup(int port) {		
	
	final int maxContentLength = 1024 * 1024 * 1024;
	
	bootstrap = new ServerBootstrap( new NioServerSocketChannelFactory(bossExecutor,  workerExecutor));

	bootstrap.setOption("connectTimeoutMillis", 10000);
	bootstrap.setOption("reuseAddress", true); 	// kernel optimization
	bootstrap.setOption("keepAlive", true); 	// for mobiles & our
	bootstrap.setOption("tcpNoDelay", true); 	// better latency over
	
	bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
		@Override
		public ChannelPipeline getPipeline() throws Exception {
			ChannelPipeline p = Channels.pipeline();
			p.addLast("http-encoder", new HttpResponseEncoder());
			p.addLast("http-decoder", new HttpRequestDecoder());
			p.addLast("http-aggregator", new HttpChunkAggregator( maxContentLength ));
			p.addLast("server-handler", new HttpServerRequestHandler());
			return p;
		}
	});
	channel = bootstrap.bind(new InetSocketAddress(port));

}
 

/**
 * Replace this {@link FrameDecoder} in the {@link ChannelPipeline} with the
 * given {@link ChannelHandler}. All remaining bytes in the
 * {@link ChannelBuffer} will get send to the new {@link ChannelHandler}
 * that was used as replacement
 * 
 */
public void replace(String handlerName, ChannelHandler handler) {
	if (ctx == null) {
		throw new IllegalStateException("Replace cann only be called once the FrameDecoder is added to the ChannelPipeline");
	}
	ChannelPipeline pipeline = ctx.getPipeline();
	pipeline.addAfter(ctx.getName(), handlerName, handler);

	try {
		if (cumulation != null) {
			Channels.fireMessageReceived(ctx, cumulation.readBytes(actualReadableBytes()));
		}
	} finally {
		pipeline.remove(this);
	}
}
 

public void startup(int port) {
	
	ChannelFactory channelFactory = new NioDatagramChannelFactory(Executors.newCachedThreadPool());
	
	bootstrap = new ConnectionlessBootstrap( channelFactory );
	bootstrap.setOption("reuseAddress", false);
	bootstrap.setOption("child.reuseAddress", false);		
	bootstrap.setOption("readBufferSize", 1024 * 1024 * 15); //15M
	bootstrap.setOption("writeBufferSize", 1024 * 20);		
	bootstrap.setOption("receiveBufferSizePredictor", new FixedReceiveBufferSizePredictor(1024 * 3));
	bootstrap.setOption("receiveBufferSizePredictorFactory", new FixedReceiveBufferSizePredictorFactory(1024 * 3));
	bootstrap.setPipelineFactory( new ChannelPipelineFactory() {
		@Override
		public ChannelPipeline getPipeline() throws Exception {
			ChannelPipeline pipeline = Channels.pipeline();
			pipeline.addLast("handler", new UdpServerChannelHandler());
			return pipeline;
		}			
	});		
	datagramChannel = (DatagramChannel) bootstrap.bind( new InetSocketAddress( port ) );
}
 

@Override
public void start() {
  ChannelFactory factory = new NioServerSocketChannelFactory(
      Executors.newCachedThreadPool(), Executors.newCachedThreadPool());

  ServerBootstrap serverBootstrap = new ServerBootstrap(factory);
  serverBootstrap.setPipelineFactory(new ChannelPipelineFactory() {
    @Override
    public ChannelPipeline getPipeline() {
      syslogTcpHandler handler = new syslogTcpHandler();
      handler.setEventSize(eventSize);
      handler.setFormater(formaterProp);
      return Channels.pipeline(handler);
    }
  });

  logger.info("Syslog TCP Source starting...");

  if (host == null) {
    nettyChannel = serverBootstrap.bind(new InetSocketAddress(port));
  } else {
    nettyChannel = serverBootstrap.bind(new InetSocketAddress(host, port));
  }

  super.start();
}
 

public ChannelPipeline getPipeline() throws Exception {
  // Create a default pipeline implementation.
  ChannelPipeline pipeline = pipeline();

  // Uncomment the following line if you want HTTPS
  // SSLEngine engine =
  // SecureChatSslContextFactory.getServerContext().createSSLEngine();
  // engine.setUseClientMode(false);
  // pipeline.addLast("ssl", new SslHandler(engine));

  pipeline.addLast("decoder", new HttpRequestDecoder());
  //pipeline.addLast("aggregator", new HttpChunkAggregator(65536));
  pipeline.addLast("encoder", new HttpResponseEncoder());
  pipeline.addLast("chunkedWriter", new ChunkedWriteHandler());
  pipeline.addLast("deflater", new HttpContentCompressor());
  pipeline.addLast("handler", new HttpDataServerHandler(userName, appId));
  return pipeline;
}
 

/**
 * creates a new pipeline for interacting with the
 * controller.  This is where the controllerHandler and
 * the timeouthandler come into play
 * @return the pipeline (ChannelPipeline) for a new Socket.
 */
private ChannelPipeline getPipeline(){
	ChannelPipeline pipe = Channels.pipeline();
    
	ChannelHandler idleHandler = new IdleStateHandler(timer, 20, 25, 0);
    ChannelHandler readTimeoutHandler = new ReadTimeoutHandler(timer, 30);
    OFControllerChannelHandler controllerHandler = new OFControllerChannelHandler();
	
       pipe.addLast("ofmessagedecoder", new OFMessageDecoder());
       pipe.addLast("ofmessageencoder", new OFMessageEncoder());
       pipe.addLast("idle", idleHandler);
       pipe.addLast("timeout", readTimeoutHandler);
       pipe.addLast("handshaketimeout",
                    new ControllerHandshakeTimeoutHandler(controllerHandler, timer, 15));
       pipe.addLast("handler", controllerHandler);
       return pipe;
}
 

@Override
protected void doOpen() throws Throwable {
    NettyHelper.setNettyLoggerFactory();
    bootstrap = new ClientBootstrap(channelFactory);
    // config
    // @see org.jboss.netty.channel.socket.SocketChannelConfig
    bootstrap.setOption("keepAlive", true);
    bootstrap.setOption("tcpNoDelay", true);
    bootstrap.setOption("connectTimeoutMillis", getTimeout());
    final NettyHandler nettyHandler = new NettyHandler(getUrl(), this);
    bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
        public ChannelPipeline getPipeline() {
            NettyCodecAdapter adapter = new NettyCodecAdapter(getCodec(), getUrl(), NettyClient.this);
            ChannelPipeline pipeline = Channels.pipeline();
            pipeline.addLast("decoder", adapter.getDecoder());
            pipeline.addLast("encoder", adapter.getEncoder());
            pipeline.addLast("handler", nettyHandler);
            return pipeline;
        }
    });
}
 

@Override
public ChannelPipeline getPipeline() throws Exception {
    OFChannelHandler handler = new OFChannelHandler(controller);
    
    ChannelPipeline pipeline = Channels.pipeline();
    pipeline.addLast("ofmessagedecoder", new OFMessageDecoder());
    pipeline.addLast("ofmessageencoder", new OFMessageEncoder());
    pipeline.addLast("idle", idleHandler);
    pipeline.addLast("timeout", readTimeoutHandler);
    pipeline.addLast("handshaketimeout",
                     new HandshakeTimeoutHandler(handler, timer, 15));
    if (pipelineExecutor != null)
        pipeline.addLast("pipelineExecutor",
                         new ExecutionHandler(pipelineExecutor));
    pipeline.addLast("handler", handler);
    return pipeline;
}
 

/**
 * Dependency injection friendly convenience method for
 * {@link #setPipeline(ChannelPipeline)} which sets the default pipeline of
 * this bootstrap from an ordered map.
 * <p>
 * Please note that this method is a convenience method that works only
 * when <b>1)</b> you create only one channel from this bootstrap (e.g.
 * one-time client-side or connectionless channel) or <b>2)</b> all handlers
 * in the pipeline is stateless.  You have to use
 * {@link #setPipelineFactory(ChannelPipelineFactory)} if <b>1)</b> your
 * pipeline contains a stateful {@link ChannelHandler} and <b>2)</b> one or
 * more channels are going to be created by this bootstrap (e.g. server-side
 * channels).
 *
 * @throws IllegalArgumentException
 *         if the specified map is not an ordered map
 */
public void setPipelineAsMap(Map<String, ChannelHandler> pipelineMap) {
    if (pipelineMap == null) {
        throw new NullPointerException("pipelineMap");
    }

    if (!isOrderedMap(pipelineMap)) {
        throw new IllegalArgumentException(
                "pipelineMap is not an ordered map. " +
                "Please use " +
                LinkedHashMap.class.getName() + '.');
    }

    ChannelPipeline pipeline = pipeline();
    for (Map.Entry<String, ChannelHandler> e: pipelineMap.entrySet()) {
        pipeline.addLast(e.getKey(), e.getValue());
    }

    setPipeline(pipeline);
}
 

@Override
protected void doOpen() throws Throwable {
    NettyHelper.setNettyLoggerFactory();
    bootstrap = new ClientBootstrap(channelFactory);
    // config
    // @see org.jboss.netty.channel.socket.SocketChannelConfig
    bootstrap.setOption("keepAlive", true);
    bootstrap.setOption("tcpNoDelay", true);
    bootstrap.setOption("connectTimeoutMillis", getConnectTimeout());
    final NettyHandler nettyHandler = new NettyHandler(getUrl(), this);
    bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
        @Override
        public ChannelPipeline getPipeline() {
            NettyCodecAdapter adapter = new NettyCodecAdapter(getCodec(), getUrl(), NettyClient.this);
            ChannelPipeline pipeline = Channels.pipeline();
            pipeline.addLast("decoder", adapter.getDecoder());
            pipeline.addLast("encoder", adapter.getEncoder());
            pipeline.addLast("handler", nettyHandler);
            return pipeline;
        }
    });
}
 

@Override
public ChannelPipeline getPipeline() throws Exception {
    // Create a default pipeline implementation.
    ChannelPipeline pipeline = pipeline();
    if ( ssl ) {
        SSLEngine sslEngine = WebSocketSslContextFactory.getServerContext().createSSLEngine();
        sslEngine.setUseClientMode( false );
        pipeline.addLast( "ssl", new SslHandler( sslEngine ) );
    }
    pipeline.addLast( "decoder", new HttpRequestDecoder() );
    pipeline.addLast( "aggregator", new HttpChunkAggregator( 65536 ) );
    pipeline.addLast( "encoder", new HttpResponseEncoder() );
    pipeline.addLast( "execution", executionHandler );
    pipeline.addLast( "handler", new WebSocketChannelHandler( emf, smf, management, securityManager, ssl ) );
    return pipeline;
}
 

public ChannelPipeline getPipeline() throws Exception {

        Integer max = Integer.valueOf(Play.configuration.getProperty("play.netty.maxContentLength", "-1"));
           
        ChannelPipeline pipeline = pipeline();
        PlayHandler playHandler = new PlayHandler();
        
        pipeline.addLast("flashPolicy", new FlashPolicyHandler()); 
        pipeline.addLast("decoder", new HttpRequestDecoder());
        pipeline.addLast("aggregator", new StreamChunkAggregator(max));
        pipeline.addLast("encoder", new HttpResponseEncoder());
        pipeline.addLast("chunkedWriter", playHandler.chunkedWriteHandler);
        pipeline.addLast("handler", playHandler);

        return pipeline;
    }
 

@Override
protected void doOpen() throws Throwable {
    NettyHelper.setNettyLoggerFactory();
    bootstrap = new ClientBootstrap(channelFactory);
    // config
    // @see org.jboss.netty.channel.socket.SocketChannelConfig
    bootstrap.setOption("keepAlive", true);
    bootstrap.setOption("tcpNoDelay", true);
    bootstrap.setOption("connectTimeoutMillis", getTimeout());
    final NettyHandler nettyHandler = new NettyHandler(getUrl(), this);
    bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
        public ChannelPipeline getPipeline() {
            NettyCodecAdapter adapter = new NettyCodecAdapter(getCodec(), getUrl(), NettyClient.this);
            ChannelPipeline pipeline = Channels.pipeline();
            pipeline.addLast("decoder", adapter.getDecoder());
            pipeline.addLast("encoder", adapter.getEncoder());
            pipeline.addLast("handler", nettyHandler);
            return pipeline;
        }
    });
}
 

private Channel connectFrom(InetSocketAddress connectToSocket, SocketAddress localAddress)
     throws InterruptedException {

     ChannelFactory channelFactory =
         new NioClientSocketChannelFactory(
                 Executors.newCachedThreadPool(),
                 Executors.newCachedThreadPool());
     ChannelPipelineFactory pipelineFactory = () -> {
         ChannelPipeline pipeline = Channels.pipeline();
         pipeline.addLast("BgpPeerFrameDecoderTest",
                 peerFrameDecoder);
         pipeline.addLast("BgpPeerChannelHandlerTest",
                 peerChannelHandler);
         return pipeline;
     };

     peerBootstrap = new ClientBootstrap(channelFactory);
     peerBootstrap.setOption("child.keepAlive", true);
     peerBootstrap.setOption("child.tcpNoDelay", true);
     peerBootstrap.setPipelineFactory(pipelineFactory);
     Channel channel = peerBootstrap.connect(connectToSocket, localAddress).getChannel();
     return channel;
}
 

@Override
public SocketChannel newChannel(ChannelPipeline pipeline) {
  try {
    SSLContext sslContext = SSLContext.getInstance("TLS");
    sslContext.init(null, new TrustManager[]{new PermissiveTrustManager()},
                    null);
    SSLEngine sslEngine = sslContext.createSSLEngine();
    sslEngine.setUseClientMode(true);
    // addFirst() will make SSL handling the first stage of decoding
    // and the last stage of encoding
    pipeline.addFirst("ssl", new SslHandler(sslEngine));
    return super.newChannel(pipeline);
  } catch (Exception ex) {
    throw new RuntimeException("Cannot create SSL channel", ex);
  }
}
 

@Override
public ChannelPipeline getPipeline() throws Exception {
  ChannelPipeline pipeline = Channels.pipeline();
  if (sslFactory != null) {
    pipeline.addLast("ssl", new SslHandler(sslFactory.createSSLEngine()));
  }
  pipeline.addLast("decoder", new HttpRequestDecoder());
  pipeline.addLast("aggregator", new HttpChunkAggregator(1 << 16));
  pipeline.addLast("encoder", new HttpResponseEncoder());
  pipeline.addLast("chunking", new ChunkedWriteHandler());
  pipeline.addLast("shuffle", SHUFFLE);
  return pipeline;
  // TODO factor security manager into pipeline
  // TODO factor out encode/decode to permit binary shuffle
  // TODO factor out decode of index to permit alt. models
}
 

@Override
public ChannelPipeline getPipeline() throws Exception {
    RPCChannelHandler channelHandler = 
            new RPCChannelHandler(syncManager, rpcService);

    IdleStateHandler idleHandler = 
            new IdleStateHandler(timer, 5, 10, 0);
    ReadTimeoutHandler readTimeoutHandler = 
            new ReadTimeoutHandler(timer, 30);
    
    ChannelPipeline pipeline = Channels.pipeline();
    pipeline.addLast("idle", idleHandler);
    pipeline.addLast("timeout", readTimeoutHandler);
    pipeline.addLast("handshaketimeout",
                     new HandshakeTimeoutHandler(channelHandler, timer, 10));

    pipeline.addLast("frameDecoder",
                     new ThriftFrameDecoder(maxFrameSize));
    pipeline.addLast("frameEncoder",
                     new ThriftFrameEncoder());

    pipeline.addLast("handler", channelHandler);
    return pipeline;
}
 

@Override
public ChannelPipeline getPipeline() throws Exception {
    ChannelPipeline pipeline = pipeline();

    pipeline.addLast("idle-detection", IDLE_STATE_HANDLER);
    pipeline.addLast("logging", new LoggingHandler(InternalLogLevel.DEBUG));
    pipeline.addLast("http-deflater", new HttpContentCompressor());
    pipeline.addLast("decoder", new HttpResponseDecoder(RESPONSE_MAX_INITIAL_LINE_LENGTH, RESPONSE_MAX_HEADER_SIZE, RESPONSE_MAX_CHUNK_SIZE));
    pipeline.addLast("encoder", new HttpRequestEncoder());
    pipeline.addLast("http-inflater", new HttpContentDecompressor());
    pipeline.addLast("remote-hop-timer", new ClientTimingHandler("outbound"));
    pipeline.addLast("exception-surfacer", EXCEPTION_SURFACER);
    pipeline.addLast("idle-watchdog", new IdleChannelWatchdog("outbound"));

    return pipeline;
}
 

@Override
public ChannelPipeline getPipeline() throws Exception {
  ChannelPipeline pipeline = Channels.pipeline();
  if (enableCompression) {
    ZlibEncoder encoder = new ZlibEncoder(6);
    pipeline.addFirst("deflater", encoder);
    pipeline.addFirst("inflater", new ZlibDecoder());
  }
  if (enableSsl) {
    SSLEngine sslEngine = createServerSSLContext().createSSLEngine();
    sslEngine.setUseClientMode(false);
    // addFirst() will make SSL handling the first stage of decoding
    // and the last stage of encoding this must be added after
    // adding compression handling above
    pipeline.addFirst("ssl", new SslHandler(sslEngine));
  }
  return pipeline;
}
 

public ChannelPipeline getPipeline() throws Exception {
    // this is pretty verbose from the netty examples
    ChannelPipeline pipeline = Channels.pipeline();
    pipeline.addLast("framer", new DelimiterBasedFrameDecoder(8192, Delimiters.lineDelimiter()));
    pipeline.addLast("decoder", new StringDecoder());
    pipeline.addLast("encoder", new StringEncoder());
    pipeline.addLast("handler", new FakeCarbonHandler(appConfig));
    return pipeline;
}
 

@Override
public ChannelPipeline getPipeline() throws Exception {
  ChannelPipeline pipeline = Channels.pipeline();
  pipeline.addLast("decoder", new HttpRequestDecoder());
  pipeline.addLast("aggregator", new HttpChunkAggregator(1 << 16));
  pipeline.addLast("encoder", new HttpResponseEncoder());
  pipeline.addLast("chunking", new ChunkedWriteHandler());
  pipeline.addLast("shuffle", SHUFFLE);
  return pipeline;
  // TODO factor security manager into pipeline
  // TODO factor out encode/decode to permit binary shuffle
  // TODO factor out decode of index to permit alt. models
}
 

public final ChannelPipeline getPipeline() throws Exception {
	SessionStatus status = new SessionStatus().ready();

	return Channels.pipeline(new MemcachedFrameDecoder(status, frameSize),
			new MemcachedCommandDecoder(status), memcachedCommandHandler,
			memcachedResponseEncoder);
}
 

@Override
public SocketChannel newChannel(ChannelPipeline pipeline) {
  try {

    ZlibEncoder encoder = new ZlibEncoder(compressionLevel);
    pipeline.addFirst("deflater", encoder);
    pipeline.addFirst("inflater", new ZlibDecoder());
    return super.newChannel(pipeline);
  } catch (Exception ex) {
    throw new RuntimeException("Cannot create Compression channel", ex);
  }
}
 

public NetworkFailuresProxy(int localPort, String remoteHost, int remotePort) {
	// Configure the bootstrap.
	serverBootstrap = new ServerBootstrap(
		new NioServerSocketChannelFactory(executor, executor));

	// Set up the event pipeline factory.
	ClientSocketChannelFactory channelFactory = new NioClientSocketChannelFactory(executor, executor);
	serverBootstrap.setOption("child.tcpNoDelay", true);
	serverBootstrap.setOption("child.keepAlive", true);
	serverBootstrap.setPipelineFactory(new ChannelPipelineFactory() {
		public ChannelPipeline getPipeline() throws Exception {
			ChannelPipeline pipeline = Channels.pipeline();

			// synchronized for a race between blocking and creating new handlers
			synchronized (networkFailureHandlers) {
				NetworkFailureHandler failureHandler = new NetworkFailureHandler(
					blocked,
					networkFailureHandler -> networkFailureHandlers.remove(networkFailureHandler),
					channelFactory,
					remoteHost,
					remotePort);
				networkFailureHandlers.add(failureHandler);
				pipeline.addLast(NETWORK_FAILURE_HANDLER_NAME, failureHandler);
			}
			return pipeline;
		}
	});
	channel = serverBootstrap.bind(new InetSocketAddress(localPort));

	LOG.info("Proxying [*:{}] to [{}:{}]", getLocalPort(), remoteHost, remotePort);
}
 

@Override
public ChannelPipeline getPipeline() {

    // cannot have the DelimiterBasedFrameDecoder! does not work with
    // UDP; make packet missing.
    ChannelPipeline pipeline = Channels.pipeline();
    // ORDER matters!!! put the channdler first
    pipeline.addLast("idleTimer", idleStateHandler);
    pipeline.addLast("idleHandler", myIdleHandler);
    pipeline.addLast("stringDecoder", UdpMeta.stringDecoder);
    pipeline.addLast("stringEncoder", UdpMeta.stringEncoder);
    pipeline.addLast("UDPUpstreamHandler", new UdpChannelHandler(
            udpWorker));
    return pipeline;
}