List of usage examples for io.netty.bootstrap ServerBootstrap childHandler
ChannelHandler childHandler
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From source file:com.foilen.smalltools.net.netty.NettyServer.java
License:Open Source License
/** * Start the server.// www . j a v a2 s. c o m * * @param port * the port to listen on (0 for a random port ; get it with {@link #getPort()}) * @param trustedCertificates * (optional) the certificate to trust connections from * @param certificate * (optional) the server's certificate * @param channelHandlerContainers * the channel handlers for the incoming connections */ public void start(final int port, final RSATrustedCertificates trustedCertificates, final RSACertificate certificate, final List<ChannelHandlerContainer> channelHandlerContainers) { AssertTools.assertNull(thread, "Server is already started"); final CountDownLatch countDownLatch = new CountDownLatch(1); thread = new Thread(() -> { try { ServerBootstrap serverBootstrap = new ServerBootstrap(); serverBootstrap.group(NettyCommon.EVENT_LOOP_GROUP, NettyCommon.EVENT_LOOP_GROUP); serverBootstrap.channel(NioServerSocketChannel.class); serverBootstrap.childHandler(new ChannelInitializer<SocketChannel>() { @Override protected void initChannel(SocketChannel socketChannel) throws Exception { InetSocketAddress remoteAddress = socketChannel.remoteAddress(); logger.info("Got a connection from {}:{}", remoteAddress.getHostName(), remoteAddress.getPort()); // Add sslCtx if needed if (trustedCertificates != null || certificate != null) { TrustManagerFactory trustManagerFactory = trustedCertificates == null ? null : RSATools.createTrustManagerFactory(trustedCertificates); KeyManagerFactory keyManagerFactory = certificate == null ? null : RSATools.createKeyManagerFactory(certificate); CipherSuiteFilter cipherFilter = IdentityCipherSuiteFilter.INSTANCE; SslContext sslCtx = SslContext.newServerContext(SslProvider.JDK, null, trustManagerFactory, null, null, null, keyManagerFactory, null, cipherFilter, null, 0, 0); SslHandler sslHandler = sslCtx.newHandler(socketChannel.alloc()); if (trustManagerFactory == null) { logger.debug("Will not verify client's identity"); } else { logger.debug("Will verify client's identity"); SSLEngine sslEngine = sslHandler.engine(); sslEngine.setNeedClientAuth(true); } socketChannel.pipeline().addLast(sslHandler); } // Add the channel handlers for (ChannelHandlerContainer channelHandlerContainer : channelHandlerContainers) { socketChannel.pipeline() .addLast(ReflectionTools.instantiate( channelHandlerContainer.getChannelHandlerClass(), channelHandlerContainer.getConstructorParams())); } } }) // .option(ChannelOption.SO_BACKLOG, 128) // .childOption(ChannelOption.SO_KEEPALIVE, true); bindedPort = port; logger.info("Server on port {} is starting...", port); ChannelFuture channelFuture = serverBootstrap.bind(port).sync(); SocketAddress socketAddress = channelFuture.channel().localAddress(); if (socketAddress instanceof InetSocketAddress) { InetSocketAddress inetSocketAddress = (InetSocketAddress) socketAddress; bindedPort = inetSocketAddress.getPort(); } logger.info("Server on port {} is started", bindedPort); countDownLatch.countDown(); channelFuture.channel().closeFuture().sync(); } catch (InterruptedException e) { logger.info("Server on port {} is interrupted", bindedPort); } finally { countDownLatch.countDown(); } logger.info("Server on port {} is stopped", bindedPort); }); thread.setName("Netty Server-" + bindedPort); thread.start(); try { countDownLatch.await(); } catch (InterruptedException e) { logger.error("Interrupted while waiting for the server to start"); } }
From source file:com.github.sinsinpub.pero.manual.proxyhandler.ProxyServer.java
License:Apache License
/** * Starts a new proxy server with disabled authentication for testing purpose. * //from w ww.j ava2 s . c om * @param useSsl {@code true} if and only if implicit SSL is enabled * @param testMode the test mode * @param username the expected username. If the client tries to authenticate with a different * username, this server will fail the authentication request. * @param password the expected password. If the client tries to authenticate with a different * password, this server will fail the authentication request. * @param destination the expected destination. If the client requests proxying to a different * destination, this server will reject the connection request. */ protected ProxyServer(final boolean useSsl, TestMode testMode, InetSocketAddress destination, String username, String password, int bindPort, boolean logging) { this.testMode = testMode; this.destination = destination; this.username = username; this.password = password; ServerBootstrap b = new ServerBootstrap(); b.channel(NioServerSocketChannel.class); if (logging) { b.handler(new LoggingHandler(LogLevel.INFO)); } b.group(StaticContextProvider.group); b.childHandler(new ChannelInitializer<SocketChannel>() { @Override protected void initChannel(SocketChannel ch) throws Exception { ChannelPipeline p = ch.pipeline(); if (useSsl) { p.addLast(StaticContextProvider.serverSslCtx.newHandler(ch.alloc())); } configure(ch); } }); ch = (ServerSocketChannel) b.bind(NetUtil.LOCALHOST, bindPort).syncUninterruptibly().channel(); }
From source file:com.googlecode.protobuf.pro.duplex.example.DuplexPingPongServer.java
License:Apache License
public static void main(String[] args) throws Exception { if (args.length < 4) { System.err.println("usage: <serverHostname> <serverPort> <ssl=Y/N> <nodelay=Y/N>"); System.exit(-1);/*from w w w . j a va 2 s . c o m*/ } String serverHostname = args[0]; int serverPort = Integer.parseInt(args[1]); boolean secure = "Y".equals(args[2]); boolean nodelay = "Y".equals(args[3]); long runDuration = 0; if (args.length > 4) { runDuration = Long.parseLong(args[4]); } log.info("DuplexPingPongServer " + serverHostname + ":" + serverPort + " ssl=" + (secure ? "Y" : "N") + " nodelay=" + (nodelay ? "Y" : "N")); PeerInfo serverInfo = new PeerInfo(serverHostname, serverPort); RpcServerCallExecutor executor = new ThreadPoolCallExecutor(3, 200); DuplexTcpServerPipelineFactory serverFactory = new DuplexTcpServerPipelineFactory(serverInfo); serverFactory.setRpcServerCallExecutor(executor); if (secure) { RpcSSLContext sslCtx = new RpcSSLContext(); sslCtx.setKeystorePassword("changeme"); sslCtx.setKeystorePath("./lib/server.keystore"); sslCtx.setTruststorePassword("changeme"); sslCtx.setTruststorePath("./lib/truststore"); sslCtx.init(); serverFactory.setSslContext(sslCtx); } NullLogger logger = new NullLogger(); serverFactory.setLogger(logger); RpcTimeoutExecutor timeoutExecutor = new TimeoutExecutor(1, 5); RpcTimeoutChecker timeoutChecker = new TimeoutChecker(); timeoutChecker.setTimeoutExecutor(timeoutExecutor); timeoutChecker.startChecking(serverFactory.getRpcClientRegistry()); // setup a RPC event listener - it just logs what happens RpcConnectionEventNotifier rpcEventNotifier = new RpcConnectionEventNotifier(); RpcConnectionEventListener listener = new RpcConnectionEventListener() { @Override public void connectionReestablished(RpcClientChannel clientChannel) { log.info("connectionReestablished " + clientChannel); } @Override public void connectionOpened(RpcClientChannel clientChannel) { log.info("connectionOpened " + clientChannel); } @Override public void connectionLost(RpcClientChannel clientChannel) { log.info("connectionLost " + clientChannel); } @Override public void connectionChanged(RpcClientChannel clientChannel) { log.info("connectionChanged " + clientChannel); } }; rpcEventNotifier.setEventListener(listener); serverFactory.registerConnectionEventListener(rpcEventNotifier); // we give the server a blocking and non blocking (pong capable) Ping Service BlockingService bPingService = BlockingPingService .newReflectiveBlockingService(new PingPongServiceFactory.BlockingPongingPingServer()); serverFactory.getRpcServiceRegistry().registerService(bPingService); Service nbPingService = NonBlockingPingService .newReflectiveService(new PingPongServiceFactory.NonBlockingPongingPingServer()); serverFactory.getRpcServiceRegistry().registerService(nbPingService); // Configure the server to provide a Pong Service in both blocking an non blocking varieties BlockingService bPongService = BlockingPongService .newReflectiveBlockingService(new PingPongServiceFactory.BlockingPongServer()); serverFactory.getRpcServiceRegistry().registerService(bPongService); Service nbPongService = NonBlockingPongService .newReflectiveService(new PingPongServiceFactory.NonBlockingPongServer()); serverFactory.getRpcServiceRegistry().registerService(nbPongService); // Configure the server. ServerBootstrap bootstrap = new ServerBootstrap(); NioEventLoopGroup boss = new NioEventLoopGroup(2, new RenamingThreadFactoryProxy("boss", Executors.defaultThreadFactory())); NioEventLoopGroup workers = new NioEventLoopGroup(16, new RenamingThreadFactoryProxy("worker", Executors.defaultThreadFactory())); bootstrap.group(boss, workers); bootstrap.channel(NioServerSocketChannel.class); bootstrap.option(ChannelOption.SO_SNDBUF, 1048576); bootstrap.option(ChannelOption.SO_RCVBUF, 1048576); bootstrap.childOption(ChannelOption.SO_RCVBUF, 1048576); bootstrap.childOption(ChannelOption.SO_SNDBUF, 1048576); bootstrap.option(ChannelOption.TCP_NODELAY, nodelay); bootstrap.childHandler(serverFactory); bootstrap.localAddress(serverInfo.getPort()); // Bind and start to accept incoming connections. CleanShutdownHandler shutdownHandler = new CleanShutdownHandler(); shutdownHandler.addResource(boss); shutdownHandler.addResource(workers); shutdownHandler.addResource(executor); shutdownHandler.addResource(timeoutChecker); shutdownHandler.addResource(timeoutExecutor); bootstrap.bind(); log.info("Serving " + serverInfo); if (runDuration > 0) { Thread.sleep(runDuration); System.exit(0); } else { while (true) { try { log.info("Sleeping 60s before retesting clients."); Thread.sleep(60000); new ShortTests().execute(serverFactory.getRpcClientRegistry()); } catch (Throwable e) { log.warn("Throwable.", e); } } } }
From source file:com.googlecode.protobuf.pro.duplex.example.nonrpc.StatusServer.java
License:Apache License
public static void main(String[] args) throws Exception { if (args.length != 2) { System.err.println("usage: <serverHostname> <serverPort>"); System.exit(-1);//from ww w . j av a 2s. c om } String serverHostname = args[0]; int serverPort = Integer.parseInt(args[1]); PeerInfo serverInfo = new PeerInfo(serverHostname, serverPort); // RPC payloads are uncompressed when logged - so reduce logging CategoryPerServiceLogger logger = new CategoryPerServiceLogger(); logger.setLogRequestProto(false); logger.setLogResponseProto(false); // Configure the server. DuplexTcpServerPipelineFactory serverFactory = new DuplexTcpServerPipelineFactory(serverInfo); RpcServerCallExecutor rpcExecutor = new ThreadPoolCallExecutor(10, 10); serverFactory.setRpcServerCallExecutor(rpcExecutor); serverFactory.setLogger(logger); final RpcCallback<PingPong.Status> clientStatusCallback = new RpcCallback<PingPong.Status>() { @Override public void run(PingPong.Status parameter) { log.info("Received " + parameter); } }; // setup a RPC event listener - it just logs what happens RpcConnectionEventNotifier rpcEventNotifier = new RpcConnectionEventNotifier(); RpcConnectionEventListener listener = new RpcConnectionEventListener() { @Override public void connectionReestablished(RpcClientChannel clientChannel) { log.info("connectionReestablished " + clientChannel); clientChannel.setOobMessageCallback(Status.getDefaultInstance(), clientStatusCallback); } @Override public void connectionOpened(RpcClientChannel clientChannel) { log.info("connectionOpened " + clientChannel); clientChannel.setOobMessageCallback(Status.getDefaultInstance(), clientStatusCallback); } @Override public void connectionLost(RpcClientChannel clientChannel) { log.info("connectionLost " + clientChannel); } @Override public void connectionChanged(RpcClientChannel clientChannel) { log.info("connectionChanged " + clientChannel); clientChannel.setOobMessageCallback(Status.getDefaultInstance(), clientStatusCallback); } }; rpcEventNotifier.setEventListener(listener); serverFactory.registerConnectionEventListener(rpcEventNotifier); ServerBootstrap bootstrap = new ServerBootstrap(); EventLoopGroup boss = new NioEventLoopGroup(2, new RenamingThreadFactoryProxy("boss", Executors.defaultThreadFactory())); EventLoopGroup workers = new NioEventLoopGroup(16, new RenamingThreadFactoryProxy("worker", Executors.defaultThreadFactory())); bootstrap.group(boss, workers); bootstrap.channel(NioServerSocketChannel.class); bootstrap.option(ChannelOption.SO_SNDBUF, 1048576); bootstrap.option(ChannelOption.SO_RCVBUF, 1048576); bootstrap.childOption(ChannelOption.SO_RCVBUF, 1048576); bootstrap.childOption(ChannelOption.SO_SNDBUF, 1048576); bootstrap.option(ChannelOption.TCP_NODELAY, true); bootstrap.childHandler(serverFactory); bootstrap.localAddress(serverInfo.getPort()); CleanShutdownHandler shutdownHandler = new CleanShutdownHandler(); shutdownHandler.addResource(boss); shutdownHandler.addResource(workers); shutdownHandler.addResource(rpcExecutor); // Bind and start to accept incoming connections. bootstrap.bind(); log.info("Serving " + bootstrap); while (true) { List<RpcClientChannel> clients = serverFactory.getRpcClientRegistry().getAllClients(); for (RpcClientChannel client : clients) { PingPong.Status serverStatus = PingPong.Status.newBuilder() .setMessage("Server " + serverFactory.getServerInfo() + " OK@" + System.currentTimeMillis()) .build(); ChannelFuture oobSend = client.sendOobMessage(serverStatus); if (!oobSend.isDone()) { log.info("Waiting for completion."); oobSend.syncUninterruptibly(); } if (!oobSend.isSuccess()) { log.warn("OobMessage send failed.", oobSend.cause()); } } log.info("Sleeping 5s before sending serverStatus to all clients."); Thread.sleep(5000); } }
From source file:com.googlecode.protobuf.pro.duplex.example.simple.SimpleServer.java
License:Apache License
public static void main(String[] args) throws Exception { if (args.length != 2) { System.err.println("usage: <serverHostname> <serverPort>"); System.exit(-1);/* w ww. j a v a 2s . com*/ } String serverHostname = args[0]; int serverPort = Integer.parseInt(args[1]); PeerInfo serverInfo = new PeerInfo(serverHostname, serverPort); // RPC payloads are uncompressed when logged - so reduce logging CategoryPerServiceLogger logger = new CategoryPerServiceLogger(); logger.setLogRequestProto(false); logger.setLogResponseProto(false); // Configure the server. DuplexTcpServerPipelineFactory serverFactory = new DuplexTcpServerPipelineFactory(serverInfo); ExtensionRegistry r = ExtensionRegistry.newInstance(); PingPong.registerAllExtensions(r); serverFactory.setExtensionRegistry(r); RpcServerCallExecutor rpcExecutor = new ThreadPoolCallExecutor(10, 10); serverFactory.setRpcServerCallExecutor(rpcExecutor); serverFactory.setLogger(logger); // setup a RPC event listener - it just logs what happens RpcConnectionEventNotifier rpcEventNotifier = new RpcConnectionEventNotifier(); RpcConnectionEventListener listener = new RpcConnectionEventListener() { @Override public void connectionReestablished(RpcClientChannel clientChannel) { log.info("connectionReestablished " + clientChannel); } @Override public void connectionOpened(RpcClientChannel clientChannel) { log.info("connectionOpened " + clientChannel); } @Override public void connectionLost(RpcClientChannel clientChannel) { log.info("connectionLost " + clientChannel); } @Override public void connectionChanged(RpcClientChannel clientChannel) { log.info("connectionChanged " + clientChannel); } }; rpcEventNotifier.setEventListener(listener); serverFactory.registerConnectionEventListener(rpcEventNotifier); // we give the server a blocking and non blocking (pong capable) Ping Service BlockingService bPingService = BlockingPingService .newReflectiveBlockingService(new PingPongServiceFactory.BlockingPongingPingServer()); serverFactory.getRpcServiceRegistry().registerService(true, bPingService); Service nbPingService = NonBlockingPingService .newReflectiveService(new PingPongServiceFactory.NonBlockingPongingPingServer()); serverFactory.getRpcServiceRegistry().registerService(true, nbPingService); ServerBootstrap bootstrap = new ServerBootstrap(); EventLoopGroup boss = new NioEventLoopGroup(2, new RenamingThreadFactoryProxy("boss", Executors.defaultThreadFactory())); EventLoopGroup workers = new NioEventLoopGroup(2, new RenamingThreadFactoryProxy("worker", Executors.defaultThreadFactory())); bootstrap.group(boss, workers); bootstrap.channel(NioServerSocketChannel.class); bootstrap.option(ChannelOption.SO_SNDBUF, 1048576); bootstrap.option(ChannelOption.SO_RCVBUF, 1048576); bootstrap.childOption(ChannelOption.SO_RCVBUF, 1048576); bootstrap.childOption(ChannelOption.SO_SNDBUF, 1048576); bootstrap.option(ChannelOption.TCP_NODELAY, true); bootstrap.childHandler(serverFactory); bootstrap.localAddress(serverInfo.getPort()); CleanShutdownHandler shutdownHandler = new CleanShutdownHandler(); shutdownHandler.addResource(boss); shutdownHandler.addResource(workers); shutdownHandler.addResource(rpcExecutor); // Bind and start to accept incoming connections. bootstrap.bind(); log.info("Serving " + bootstrap); while (true) { List<RpcClientChannel> clients = serverFactory.getRpcClientRegistry().getAllClients(); log.info("Number of clients=" + clients.size()); Thread.sleep(5000); } }
From source file:com.ibm.crail.datanode.netty.server.NettyServer.java
License:Apache License
public void run() { /* start the netty server */ EventLoopGroup acceptGroup = new NioEventLoopGroup(); EventLoopGroup workerGroup = new NioEventLoopGroup(); try {//from w ww . j a v a 2 s. com ServerBootstrap boot = new ServerBootstrap(); boot.group(acceptGroup, workerGroup); /* we use sockets */ boot.channel(NioServerSocketChannel.class); /* for new incoming connection */ boot.childHandler(new ChannelInitializer<SocketChannel>() { @Override public void initChannel(SocketChannel ch) throws Exception { LOG.info("TID: " + Thread.currentThread().getId() + " , a new client connection has arrived from : " + ch.remoteAddress().toString()); /* incoming pipeline */ ch.pipeline().addLast(new RdmaDecoderRx(), /* this makes full RDMA messages */ new IncomingRequestHandler(ch, dataNode)); /* outgoing pipeline */ //ch.pipeline().addLast(new RdmaEncoderTx()); } }); /* general optimization settings */ boot.option(ChannelOption.SO_BACKLOG, 1024); boot.childOption(ChannelOption.SO_KEEPALIVE, true); /* now we bind the server and start */ ChannelFuture f = boot.bind(this.inetSocketAddress.getAddress(), this.inetSocketAddress.getPort()) .sync(); LOG.info("Datanode binded to : " + this.inetSocketAddress); /* at this point we are binded and ready */ f.channel().closeFuture().sync(); } catch (InterruptedException e) { e.printStackTrace(); } finally { workerGroup.shutdownGracefully(); acceptGroup.shutdownGracefully(); LOG.info("Datanode at " + this.inetSocketAddress + " is shutdown"); } }
From source file:com.ibm.crail.namenode.rpc.netty.NettyNameNode.java
License:Apache License
public void run(final RpcNameNodeService service) { /* here we run the incoming RPC service */ InetSocketAddress inetSocketAddress = CrailUtils.getNameNodeAddress(); LOG.info("Starting the NettyNamenode service at : " + inetSocketAddress); /* start the netty server */ EventLoopGroup acceptGroup = new NioEventLoopGroup(); EventLoopGroup workerGroup = new NioEventLoopGroup(); try {//from w ww .j a v a2 s. c om ServerBootstrap boot = new ServerBootstrap(); boot.group(acceptGroup, workerGroup); /* we use sockets */ boot.channel(NioServerSocketChannel.class); /* for new incoming connection */ boot.childHandler(new ChannelInitializer<SocketChannel>() { @Override public void initChannel(SocketChannel ch) throws Exception { LOG.info("A new connection has arrived from : " + ch.remoteAddress().toString()); /* incoming pipeline */ ch.pipeline().addLast("RequestDecoder", new RequestDecoder()); ch.pipeline().addLast("NNProcessor", new NamenodeProcessor(service)); /* outgoing pipeline */ ch.pipeline().addLast("ResponseEncoder", new ResponseEncoder()); } }); /* general optimization settings */ boot.option(ChannelOption.SO_BACKLOG, 1024); boot.childOption(ChannelOption.SO_KEEPALIVE, true); /* now we bind the server and start */ ChannelFuture f = boot.bind(inetSocketAddress.getAddress(), inetSocketAddress.getPort()).sync(); /* at this point we are binded and ready */ f.channel().closeFuture().sync(); } catch (InterruptedException e) { e.printStackTrace(); } finally { workerGroup.shutdownGracefully(); acceptGroup.shutdownGracefully(); LOG.info("Netty namenode at " + inetSocketAddress + " is shutdown"); } }
From source file:com.im.test.WebSocketServer.java
License:Apache License
public static void main(String[] args) throws Exception { // Configure SSL. EventLoopGroup bossGroup = new NioEventLoopGroup(1); EventLoopGroup workerGroup = new NioEventLoopGroup(); try {/*from w w w .j av a 2 s . c o m*/ ServerBootstrap server = new ServerBootstrap(); server.group(bossGroup, workerGroup); server.channel(NioServerSocketChannel.class); server.handler(new LoggingHandler(LogLevel.INFO)); server.childHandler(new WebSocketServerInitializer()); Channel ch = server.bind(PORT).sync().channel(); System.out.println("Open your web browser and navigate to " + (SSL ? "https" : "http") + "://127.0.0.1:" + PORT + '/'); ch.closeFuture().sync(); } finally { bossGroup.shutdownGracefully(); workerGroup.shutdownGracefully(); } }
From source file:com.kixeye.kixmpp.p2p.node.NodeServer.java
License:Apache License
public void initialize(final String host, final int port, final EventLoopGroup bossGroup, final EventLoopGroup workerGroup, final MessageRegistry messageRegistry, final ChannelInboundHandlerAdapter channelListener) { ServerBootstrap boot = new ServerBootstrap(); boot.group(bossGroup, workerGroup);// w w w .ja v a 2 s . com boot.channel(NioServerSocketChannel.class); boot.option(ChannelOption.SO_BACKLOG, 32); boot.childOption(ChannelOption.SO_KEEPALIVE, true); boot.childOption(ChannelOption.TCP_NODELAY, true); boot.childHandler(new ChannelInitializer<SocketChannel>() { @Override public void initChannel(SocketChannel ch) throws Exception { ChannelPipeline p = ch.pipeline(); //p.addLast(new LoggingHandler()); // encoders p.addLast(new LengthFieldPrepender(4)); p.addLast(new ProtostuffEncoder(messageRegistry)); // decoders p.addLast(new LengthFieldBasedFrameDecoder(0x100000, 0, 4, 0, 4)); p.addLast(new ProtostuffDecoder(messageRegistry)); p.addLast(channelListener); } }); // start accepting connection try { logger.info("Starting NodeServer on [{}]...", port); if (host == null) { acceptChannel = boot.bind(port).sync().channel(); } else { acceptChannel = boot.bind(host, port).sync().channel(); } logger.info("NodeServer listening on [{}]...", port); } catch (InterruptedException e) { logger.error("Binding to port {} failed", port, e); } }
From source file:com.liferay.nativity.control.findersync.FSNativityControlImpl.java
License:Open Source License
@Override public boolean connect() { if (_connected) { return true; }/*from w w w . j av a 2s. c o m*/ _childEventLoopGroup = new NioEventLoopGroup(); _parentEventLoopGroup = new NioEventLoopGroup(); try { ServerBootstrap serverBootstrap = new ServerBootstrap(); serverBootstrap.group(_parentEventLoopGroup, _childEventLoopGroup); serverBootstrap.channel(NioServerSocketChannel.class); ChannelInitializer channelInitializer = new ChannelInitializer<SocketChannel>() { @Override protected void initChannel(SocketChannel socketChannel) throws Exception { DelimiterBasedFrameDecoder messageDecoder = new DelimiterBasedFrameDecoder(Integer.MAX_VALUE, Delimiters.lineDelimiter()); FinderSyncChannelHandler finderSyncChannelHandler = new FinderSyncChannelHandler(); socketChannel.pipeline().addLast(messageDecoder, finderSyncChannelHandler); } }; serverBootstrap.childHandler(channelInitializer); serverBootstrap.childOption(ChannelOption.SO_KEEPALIVE, true); ChannelFuture channelFuture = serverBootstrap.bind(0).sync(); InetSocketAddress inetSocketAddress = (InetSocketAddress) channelFuture.channel().localAddress(); _writePortToFile(inetSocketAddress.getPort()); } catch (Exception e) { _logger.error(e.getMessage(), e); _connected = false; return false; } _connected = true; return true; }