io.netty.channel.ChannelInitializer#io.netty.channel.ChannelOption源码实例Demo

public synchronized void start(NettyClientConfig config) {
    if (started.get()) {
        return;
    }
    initHandler();
    Bootstrap bootstrap = new Bootstrap();
    eventLoopGroup = new NioEventLoopGroup(1, new DefaultThreadFactory(clientName + "-boss"));
    eventExecutors = new DefaultEventExecutorGroup(config.getClientWorkerThreads(), new DefaultThreadFactory(clientName + "-worker"));
    connectManager = new NettyConnectManageHandler(bootstrap, config.getConnectTimeoutMillis());
    bootstrap.group(this.eventLoopGroup)
            .channel(NioSocketChannel.class)
            .option(ChannelOption.TCP_NODELAY, true)
            .option(ChannelOption.SO_KEEPALIVE, false)
            .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, config.getConnectTimeoutMillis())
            .option(ChannelOption.SO_SNDBUF, config.getClientSocketSndBufSize())
            .option(ChannelOption.SO_RCVBUF, config.getClientSocketRcvBufSize())
            .handler(newChannelInitializer(config, eventExecutors, connectManager));
    started.set(true);
}
 

/**
 * Connect to MySQL.
 */
public synchronized void connect() {
    responseCallback = new DefaultPromise<>(eventLoopGroup.next());
    channel = new Bootstrap()
            .group(eventLoopGroup)
            .channel(NioSocketChannel.class)
            .handler(new ChannelInitializer<SocketChannel>() {
                @Override
                protected void initChannel(final SocketChannel socketChannel) {
                    socketChannel.pipeline().addLast(new PacketCodec(new MySQLPacketCodecEngine()));
                    socketChannel.pipeline().addLast(new MySQLCommandPacketDecoder());
                    socketChannel.pipeline().addLast(new MySQLNegotiateHandler(username, password, responseCallback));
                    socketChannel.pipeline().addLast(new MySQLCommandResponseHandler());
                }
            })
            .option(ChannelOption.AUTO_READ, true)
            .connect(host, port).channel();
    serverInfo = waitExpectedResponse(ServerInfo.class);
}
 

public static void main(String[] args) throws Exception {       
    EventLoopGroup mainLoop = new NioEventLoopGroup(1);
    EventLoopGroup workerLoop = new NioEventLoopGroup();
    try {
    	ChannelFuture f = new ServerBootstrap().group(mainLoop, workerLoop)
         .channel(NioSctpServerChannel.class)
         .option(ChannelOption.SO_BACKLOG, 100)
         .handler(new LoggingHandler(LogLevel.INFO))
         .childHandler(new ChannelInitializer<SctpChannel>() {
             @Override
             public void initChannel(SctpChannel ch) throws Exception {
            	 ChannelPipeline p = ch.pipeline();                	
                 p.addLast(new SimpleSctpServerHandler());
             }
         }).bind(PORT).sync();            
        f.channel().closeFuture().sync();
    } finally {            
        mainLoop.shutdownGracefully();
        workerLoop.shutdownGracefully();
    }
}
 

private NettyClientTransport newTransport(ProtocolNegotiator negotiator, int maxMsgSize,
    int maxHeaderListSize, String userAgent, boolean enableKeepAlive) {
  long keepAliveTimeNano = KEEPALIVE_TIME_NANOS_DISABLED;
  long keepAliveTimeoutNano = TimeUnit.SECONDS.toNanos(1L);
  if (enableKeepAlive) {
    keepAliveTimeNano = TimeUnit.SECONDS.toNanos(10L);
  }
  NettyClientTransport transport = new NettyClientTransport(
      address, NioSocketChannel.class, new HashMap<ChannelOption<?>, Object>(), group, negotiator,
      DEFAULT_WINDOW_SIZE, maxMsgSize, maxHeaderListSize,
      keepAliveTimeNano, keepAliveTimeoutNano,
      false, authority, userAgent, tooManyPingsRunnable,
      new TransportTracer(), eagAttributes, new SocketPicker());
  transports.add(transport);
  return transport;
}
 

private void startServer(int maxStreamsPerConnection, int maxHeaderListSize) throws IOException {
  server = new NettyServer(
      TestUtils.testServerAddress(0),
      NioServerSocketChannel.class,
      new HashMap<ChannelOption<?>, Object>(),
      group, group, negotiator,
      Collections.<ServerStreamTracer.Factory>emptyList(),
      TransportTracer.getDefaultFactory(),
      maxStreamsPerConnection,
      DEFAULT_WINDOW_SIZE, DEFAULT_MAX_MESSAGE_SIZE, maxHeaderListSize,
      DEFAULT_SERVER_KEEPALIVE_TIME_NANOS, DEFAULT_SERVER_KEEPALIVE_TIMEOUT_NANOS,
      MAX_CONNECTION_IDLE_NANOS_DISABLED,
      MAX_CONNECTION_AGE_NANOS_DISABLED, MAX_CONNECTION_AGE_GRACE_NANOS_INFINITE, true, 0,
      channelz);
  server.start(serverListener);
  address = TestUtils.testServerAddress(server.getPort());
  authority = GrpcUtil.authorityFromHostAndPort(address.getHostString(), address.getPort());
}
 

private void buildServerAndRun(EventLoopGroup bossGroup, EventLoopGroup workerGroup,
                               Class<? extends ServerChannel> channelClass) throws Exception {

    var b = new ServerBootstrap();
    try {
        b.group(bossGroup, workerGroup)
                .channel(channelClass)
                .childOption(ChannelOption.SO_KEEPALIVE, true)
                .childHandler(getChannelInitializer());

        var listenTo = (listenAddress == null || listenAddress.isEmpty())
                ? new InetSocketAddress(port)
                : new InetSocketAddress(listenAddress, port);
        this.cf = b.bind(listenTo).sync();
    } catch (Exception e) {
        log.error("Error initializing {}, port {}", getServerName(), port, e);
        throw e;
    }

    log.info("{} server listening at {} port.", getServerName(), port);
}
 

public void run() throws Exception {
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    try {
        Bootstrap b = new Bootstrap(); // (2)
        b.group(workerGroup)
                .channel(NioSocketChannel.class) // (3)
                .handler(new ChannelInitializer<SocketChannel>() { // (4)
                    @Override
                    public void initChannel(SocketChannel ch) throws Exception {
                        ch.pipeline().addLast(clientHandler);

                    }
                })
                .option(ChannelOption.SO_KEEPALIVE, true); // (6)

        // Bind and start to accept incoming connections.
        ChannelFuture f = b.connect("localhost", port).sync(); // (7)

        // Wait until the server socket is closed.
        // In this example, this does not happen, but you can do that to gracefully
        // shut down your server.
        f.channel().closeFuture().sync();
    } finally {
        workerGroup.shutdownGracefully();
    }
}
 

ServerBootstrapAcceptor(
        EventLoopGroup childGroup, ChannelHandler childHandler,
        Entry<ChannelOption<?>, Object>[] childOptions, Entry<AttributeKey<?>, Object>[] childAttrs,

        // IRIS UPDATE
        RateLimiter acceptRateLimiter, NetworkClock acceptNetworkClock
        // END IRIS UPDATE
        
        ) {
    this.childGroup = childGroup;
    this.childHandler = childHandler;
    this.childOptions = childOptions;
    this.childAttrs = childAttrs;

    // IRIS UPDATE
    this.acceptRateLimiter = acceptRateLimiter;
    this.acceptNetworkClock = acceptNetworkClock;
    // END IRIS UPDATE
}
 

@Override
protected FastdfsPool newPool(InetSocketAddress addr) {
    if (LOG.isDebugEnabled()) {
        LOG.debug("channel pool created : {}", addr);
    }

    Bootstrap bootstrap = new Bootstrap().channel(NioSocketChannel.class).group(loopGroup);
    bootstrap.remoteAddress(addr);
    bootstrap.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, (int) connectTimeout);
    bootstrap.option(ChannelOption.TCP_NODELAY, true);
    bootstrap.option(ChannelOption.SO_KEEPALIVE, true);
    return new FastdfsPool(
            bootstrap,
            readTimeout,
            idleTimeout,
            maxConnPerHost,
            maxPendingRequests
    );
}
 

public boolean connect() {
    clientGroup = new NioEventLoopGroup();
    try {
        Bootstrap b = new Bootstrap();  //服务引导程序，服务器端快速启动程序
        b.group(clientGroup)
                .channel(NioSocketChannel.class)
                .option(ChannelOption.SO_KEEPALIVE, true)
                .handler(new SynapseClientInitializer(this));

        b.connect(this.interfaz, this.port).get();
        // 等待服务端监听端口关闭，等待服务端链路关闭之后main函数才退出
        //future.channel().closeFuture().sync();
        return true;
    } catch (Exception e) {
        Server.getInstance().getLogger().alert("Synapse Client can't connect to server: " + this.interfaz + ":" + this.port);
        Server.getInstance().getLogger().alert("Reason: " + e.getLocalizedMessage());
        Server.getInstance().getLogger().warning("We will reconnect in 3 seconds");
        this.reconnect();
        return false;
    }
}
 

private void acceptConnections(@Nonnull MixServerInitializer initializer, int port,
        @Nonnegative int numWorkers) throws InterruptedException {
    final EventLoopGroup bossGroup = new NioEventLoopGroup(1);
    final EventLoopGroup workerGroup = new NioEventLoopGroup(numWorkers);
    try {
        ServerBootstrap b = new ServerBootstrap();
        b.option(ChannelOption.SO_KEEPALIVE, true);
        b.group(bossGroup, workerGroup);
        b.channel(NioServerSocketChannel.class);
        b.handler(new LoggingHandler(LogLevel.INFO));
        b.childHandler(initializer);

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

        // Wait until the server socket is closed.
        // In this example, this does not happen, but you can do that to gracefully
        // shut down your server.
        f.channel().closeFuture().sync();
    } finally {
        this.state = ServerState.STOPPING;
        workerGroup.shutdownGracefully();
        bossGroup.shutdownGracefully();
    }
}
 

public void start() {
    EventLoopGroup bossGroup = new NioEventLoopGroup(1);
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    try {
        ServerBootstrap b = new ServerBootstrap();
        b.option(ChannelOption.SO_BACKLOG, 1024);
        b.group(bossGroup, workerGroup)
                .channel(NioServerSocketChannel.class)
                .handler(new LoggingHandler(LogLevel.INFO))
                .childHandler(new ServerInitializer());

        Channel ch = b.bind(Config.getInt("server.port")).sync().channel();

        ch.closeFuture().sync();
    } catch (InterruptedException e) {
        e.printStackTrace();
    } finally {
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}
 

@Override
public void channelActive(ChannelHandlerContext ctx) {
    final Channel inboundChannel = ctx.channel();

    // Start the connection attempt.
    Bootstrap b = new Bootstrap();
    b.group(inboundChannel.eventLoop())
     .channel(ctx.channel().getClass())
     .handler(new HexDumpProxyBackendHandler(inboundChannel))
     .option(ChannelOption.AUTO_READ, false);
    ChannelFuture f = b.connect(remoteHost, remotePort);
    outboundChannel = f.channel();
    f.addListener(new ChannelFutureListener() {
        @Override
        public void operationComplete(ChannelFuture future) {
            if (future.isSuccess()) {
                // connection complete start to read first data
                inboundChannel.read();
            } else {
                // Close the connection if the connection attempt has failed.
                inboundChannel.close();
            }
        }
    });
}
 

@Override
@SuppressWarnings("unchecked")
void init(Channel channel) throws Exception {
    ChannelPipeline p = channel.pipeline();
    p.addLast(config.handler());

    final Map<ChannelOption<?>, Object> options = options0();
    synchronized (options) {
        setChannelOptions(channel, options, logger);
    }

    final Map<AttributeKey<?>, Object> attrs = attrs0();
    synchronized (attrs) {
        for (Entry<AttributeKey<?>, Object> e: attrs.entrySet()) {
            channel.attr((AttributeKey<Object>) e.getKey()).set(e.getValue());
        }
    }
}
 

public Sender(final String source, final String destination) {
  this.destination = destination;
  bootstrap = new Bootstrap();
  bootstrap.group(workerGroup);
  bootstrap.channel(NioSocketChannel.class);
  bootstrap.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 1000);
  bootstrap.option(ChannelOption.SO_KEEPALIVE, true);
  bootstrap.option(ChannelOption.TCP_NODELAY, true);
  bootstrap.handler(new ChannelInitializer<SocketChannel>() {
    @Override
    public void initChannel(SocketChannel ch) throws Exception {
      if (isSslEnabled()) {
        SSLEngine engine = serverContext.createSSLEngine();
        engine.setUseClientMode(true);
        ch.pipeline().addLast(new SslHandler(engine));
      }
      // Inbound handlers.
      ch.pipeline().addLast("clientError", new ClientErrorHandler());
      // Outbound handlers.
      ch.pipeline().addLast("frameEncoder", new LengthFieldPrepender(4));
    }
  });
}
 

private void run() throws Exception {

        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();

        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class).childHandler(new ChannelInitializer<SocketChannel>() {
                public void initChannel(SocketChannel ch) throws Exception {
                    ch.pipeline().addLast(new ChannelHandlerA(), new ChannelHandlerB());
                }
            }).option(ChannelOption.SO_BACKLOG, 128).childOption(ChannelOption.SO_KEEPALIVE, true);
            ChannelFuture f = b.bind(port).sync(); // (7)
            f.channel().closeFuture().sync();
        } finally {
            workerGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }
    }
 

/**
 * Bootstraps a server.
 *
 * @return a future to be completed once the server has been bound to all interfaces
 */
private CompletableFuture<Void> bootstrapServer() {
  ServerBootstrap b = new ServerBootstrap();
  b.option(ChannelOption.SO_REUSEADDR, true);
  b.option(ChannelOption.SO_BACKLOG, 128);
  b.childOption(ChannelOption.WRITE_BUFFER_WATER_MARK,
      new WriteBufferWaterMark(8 * 1024, 32 * 1024));
  b.childOption(ChannelOption.SO_RCVBUF, 1024 * 1024);
  b.childOption(ChannelOption.SO_SNDBUF, 1024 * 1024);
  b.childOption(ChannelOption.SO_KEEPALIVE, true);
  b.childOption(ChannelOption.TCP_NODELAY, true);
  b.childOption(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
  b.group(serverGroup, clientGroup);
  b.channel(serverChannelClass);
  if (enableNettyTls) {
    try {
      b.childHandler(new SslServerChannelInitializer());
    } catch (SSLException e) {
      return Futures.exceptionalFuture(e);
    }
  } else {
    b.childHandler(new BasicServerChannelInitializer());
  }
  return bind(b);
}
 

@Override
public <T> boolean setOption(ChannelOption<T> option, T value) {
    validate(option, value);

    if (option == SO_RCVBUF) {
        setReceiveBufferSize((Integer) value);
    } else if (option == SO_SNDBUF) {
        setSendBufferSize((Integer) value);
    } else if (option == SCTP_NODELAY) {
        setSctpNoDelay((Boolean) value);
    } else if (option == SCTP_INIT_MAXSTREAMS) {
        setInitMaxStreams((SctpStandardSocketOptions.InitMaxStreams) value);
    } else {
        return super.setOption(option, value);
    }

    return true;
}
 

private @NotNull ServerBootstrap serverBootstrap(@NotNull TChannel topChannel) {
    return new ServerBootstrap()
        .group(this.bossGroup, this.childGroup)
        .channel(useEpoll ? EpollServerSocketChannel.class : NioServerSocketChannel.class)
        .handler(new LoggingHandler(LogLevel.INFO))
        .option(ChannelOption.SO_BACKLOG, 128)
        .childHandler(this.channelInitializer(true, topChannel))
        .childOption(ChannelOption.SO_KEEPALIVE, true)
        .childOption(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT)
        .childOption(
            ChannelOption.WRITE_BUFFER_WATER_MARK,
            new WriteBufferWaterMark(WRITE_BUFFER_LOW_WATER_MARK, WRITE_BUFFER_HIGH_WATER_MARK)
        )
        .validate();
}
 

@Test
public void getPort_notStarted() {
  InetSocketAddress addr = new InetSocketAddress(0);
  NettyServer ns = new NettyServer(
      addr,
      new ReflectiveChannelFactory<>(NioServerSocketChannel.class),
      new HashMap<ChannelOption<?>, Object>(),
      new HashMap<ChannelOption<?>, Object>(),
      new FixedObjectPool<>(eventLoop),
      new FixedObjectPool<>(eventLoop),
      false,
      ProtocolNegotiators.plaintext(),
      Collections.<ServerStreamTracer.Factory>emptyList(),
      TransportTracer.getDefaultFactory(),
      1, // ignore
      false, // ignore
      1, // ignore
      1, // ignore
      1, // ignore
      1, // ignore
      1, 1, // ignore
      1, 1, // ignore
      true, 0, // ignore
      channelz);

  assertThat(ns.getListenSocketAddress()).isEqualTo(addr);
}
 

private void closeOnRead(ChannelPipeline pipeline) {
    SelectionKey key = selectionKey();
    setInputShutdown();
    if (isOpen()) {
        if (Boolean.TRUE.equals(config().getOption(ChannelOption.ALLOW_HALF_CLOSURE))) {
            key.interestOps(key.interestOps() & ~readInterestOp);
            pipeline.fireUserEventTriggered(ChannelInputShutdownEvent.INSTANCE);
        } else {
            close(voidPromise());
        }
    }
}
 

@Override
protected Bootstrap createBootstrap() {
    final var b = new Bootstrap();

    final boolean tcpNoDelay = Boolean.parseBoolean(System.getProperty("nfs.rpc.tcp.nodelay", "true"));

    b.group(getBossEventLoopGroup())
            .channel(NioSocketChannel.class)
            .option(ChannelOption.SO_KEEPALIVE, true)
            .option(ChannelOption.TCP_NODELAY, tcpNoDelay)
            .remoteAddress(getSocketAddress())

            .handler(new Iso8583ChannelInitializer<>(
                    getConfiguration(),
                    getConfigurer(),
                    getWorkerEventLoopGroup(),
                    getIsoMessageFactory(),
                    getMessageHandler()
            ));

    configureBootstrap(b);

    b.validate();

    reconnectOnCloseListener = new ReconnectOnCloseListener(this,
            getConfiguration().getReconnectInterval(),
            getBossEventLoopGroup()
    );

    return b;
}
 

public static ChannelFuture newBootstrapUDP(EventLoopGroup loopGroup, SimpleChannelInboundHandler<DatagramPacket> handler, int port){
	return new Bootstrap().group(loopGroup)
			.channel(NioDatagramChannel.class)
			.option(ChannelOption.SO_BROADCAST, true)
			.handler(handler)
			.bind(port);
}
 

NettyServer(
    SocketAddress address, Class<? extends ServerChannel> channelType,
    Map<ChannelOption<?>, ?> channelOptions,
    @Nullable EventLoopGroup bossGroup, @Nullable EventLoopGroup workerGroup,
    ProtocolNegotiator protocolNegotiator, List<ServerStreamTracer.Factory> streamTracerFactories,
    TransportTracer.Factory transportTracerFactory,
    int maxStreamsPerConnection, int flowControlWindow, int maxMessageSize, int maxHeaderListSize,
    long keepAliveTimeInNanos, long keepAliveTimeoutInNanos,
    long maxConnectionIdleInNanos,
    long maxConnectionAgeInNanos, long maxConnectionAgeGraceInNanos,
    boolean permitKeepAliveWithoutCalls, long permitKeepAliveTimeInNanos,
    InternalChannelz channelz) {
  this.address = address;
  this.channelType = checkNotNull(channelType, "channelType");
  checkNotNull(channelOptions, "channelOptions");
  this.channelOptions = new HashMap<ChannelOption<?>, Object>(channelOptions);
  this.bossGroup = bossGroup;
  this.workerGroup = workerGroup;
  this.protocolNegotiator = checkNotNull(protocolNegotiator, "protocolNegotiator");
  this.streamTracerFactories = checkNotNull(streamTracerFactories, "streamTracerFactories");
  this.usingSharedBossGroup = bossGroup == null;
  this.usingSharedWorkerGroup = workerGroup == null;
  this.transportTracerFactory = transportTracerFactory;
  this.maxStreamsPerConnection = maxStreamsPerConnection;
  this.flowControlWindow = flowControlWindow;
  this.maxMessageSize = maxMessageSize;
  this.maxHeaderListSize = maxHeaderListSize;
  this.keepAliveTimeInNanos = keepAliveTimeInNanos;
  this.keepAliveTimeoutInNanos = keepAliveTimeoutInNanos;
  this.maxConnectionIdleInNanos = maxConnectionIdleInNanos;
  this.maxConnectionAgeInNanos = maxConnectionAgeInNanos;
  this.maxConnectionAgeGraceInNanos = maxConnectionAgeGraceInNanos;
  this.permitKeepAliveWithoutCalls = permitKeepAliveWithoutCalls;
  this.permitKeepAliveTimeInNanos = permitKeepAliveTimeInNanos;
  this.channelz = Preconditions.checkNotNull(channelz);
}
 

public void testShutdownOutput(ServerBootstrap sb) throws Throwable {
    TestHandler h = new TestHandler();
    Socket s = new Socket();
    Channel sc = null;
    try {
        sc = sb.childHandler(h).childOption(ChannelOption.ALLOW_HALF_CLOSURE, true).bind().sync().channel();

        SocketUtils.connect(s, sc.localAddress(), 10000);
        s.getOutputStream().write(1);

        assertEquals(1, (int) h.queue.take());

        assertTrue(h.ch.isOpen());
        assertTrue(h.ch.isActive());
        assertFalse(h.ch.isInputShutdown());
        assertFalse(h.ch.isOutputShutdown());

        s.shutdownOutput();

        h.halfClosure.await();

        assertTrue(h.ch.isOpen());
        assertTrue(h.ch.isActive());
        assertTrue(h.ch.isInputShutdown());
        assertFalse(h.ch.isOutputShutdown());
        assertEquals(1, h.closure.getCount());
        Thread.sleep(100);
        assertEquals(1, h.halfClosureCount.intValue());
    } finally {
        if (sc != null) {
            sc.close();
        }
        s.close();
    }
}
 

@Test
public void additionalSdkSocketOptionsPresent() {
    SdkChannelOptions channelOptions = new SdkChannelOptions();
    channelOptions.putOption(ChannelOption.SO_LINGER, 0);

    Map<ChannelOption, Object> expectedOptions = new HashMap<>();
    expectedOptions.put(ChannelOption.TCP_NODELAY, Boolean.TRUE);
    expectedOptions.put(ChannelOption.SO_LINGER, 0);

    assertEquals(expectedOptions, channelOptions.channelOptions());
}
 

/**
 * 创建bootstrap
 *
 * @param boss 连接线程数
 * @param work 工作线程数
 */
void createServerBootstrap(int boss, int work) {
    bootstrap = new ServerBootstrap();
    if (epollIsAvailable()) {
        createEpollGroup(boss, work);
    } else {
        createNioGroup(boss, work);
    }

    bootstrap.option(ChannelOption.TCP_NODELAY, true)
            .option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT)
            .childOption(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT)
            .childOption(ChannelOption.SO_KEEPALIVE, true);

}
 

public void run() throws Exception {
     // Configure the server.
     EventLoopGroup bossGroup = new NioEventLoopGroup(8);
     EventLoopGroup workerGroup = new NioEventLoopGroup(8);
     try {        	
     	//public service processor
         ServerBootstrap publicServerBootstrap = new ServerBootstrap();            
         publicServerBootstrap.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class);
         publicServerBootstrap.childOption(ChannelOption.TCP_NODELAY, false)
         .childOption(ChannelOption.SO_KEEPALIVE, false);
         //FIXME
         //.childHandler(new PublicHttpServerInitializer()); 
         
         //bind to public access host info
         Channel ch1;
         if("*".equals(ip)){
         	ch1 = publicServerBootstrap.bind(port).sync().channel();
         } else {
         	ch1 = publicServerBootstrap.bind(ip, port).sync().channel();
         }
         System.out.println(String.format("Started OK HttpServer at %s:%d", ip, port));
         ch1.config().setConnectTimeoutMillis(1800);            
         ch1.closeFuture().sync();             
         System.out.println("Shutdown...");
         
     } catch (Throwable e) {
e.printStackTrace();
System.exit(1);
     } finally {
         bossGroup.shutdownGracefully();
         workerGroup.shutdownGracefully();
     }
 }
 

@Test
void shouldPreserveChannelOptionInClientFactory() {
    final ClientFactory factory = ClientFactory.builder()
            .options(ClientFactoryOptions.of())
            .build();
    final Map<ChannelOption<?>, Object> channelOptions =
            factory.options().get(ClientFactoryOption.CHANNEL_OPTIONS);
    final int connectTimeoutMillis = (int) channelOptions.get(ChannelOption.CONNECT_TIMEOUT_MILLIS);
    assertThat(connectTimeoutMillis).isEqualTo(Flags.defaultConnectTimeoutMillis());
}
 

@Override
protected Future<?> execute() {
    Bootstrap cb = new Bootstrap()
            .group(proxyServer.getProxyToServerWorkerFor(transportProtocol))
            .resolver(remoteAddressResolver);

    switch (transportProtocol) {
        case TCP:
            LOG.debug("Connecting to server with TCP");
            cb.channelFactory(NioSocketChannel::new);
            break;
        case UDT:
            LOG.debug("Connecting to server with UDT");
            cb.channelFactory(NioUdtProvider.BYTE_CONNECTOR)
                    .option(ChannelOption.SO_REUSEADDR, true);
            break;
        default:
            throw new UnknownTransportProtocolException(transportProtocol);
    }

    cb.handler(new ChannelInitializer<Channel>() {
        protected void initChannel(Channel ch) {
            initChannelPipeline(ch.pipeline(), initialRequest);
        }
    });
    cb.option(ChannelOption.CONNECT_TIMEOUT_MILLIS,
            proxyServer.getConnectTimeout());

    if (localAddress != null) {
        return cb.connect(remoteAddress, localAddress);
    } else {
        return cb.connect(remoteAddress);
    }
}