java类io.netty.channel.socket.nio.NioServerSocketChannel的实例源码

public void start(SlaveNode slaveNode) {
    if(slaveNode==null){
        throw new IllegalArgumentException("slaveNode is null");
    }
    EventLoopGroup bossGroup = new NioEventLoopGroup(CommonConstants.BOSS_GROUP_SIZE, new DefaultThreadFactory("boss", true));
    EventLoopGroup workerGroup = new NioEventLoopGroup(CommonConstants.WORKER_GROUP_SIZE, new DefaultThreadFactory("worker", true));
    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 SlaveServerInitializer());

        ChannelFuture future = b.bind(slaveNode.getPort()).sync();
        LOGGER.info("SlaveServer Startup at port:{}",slaveNode.getPort());

        // 等待服务端Socket关闭
        future.channel().closeFuture().sync();
    } catch (InterruptedException e) {
        LOGGER.error("InterruptedException:",e);
    } finally {
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}

public void start() {
    EventLoopGroup bossGroup = new NioEventLoopGroup(CommonConstants.BOSS_GROUP_SIZE, new DefaultThreadFactory("boss", true));
    EventLoopGroup workerGroup = new NioEventLoopGroup(CommonConstants.WORKER_GROUP_SIZE, new DefaultThreadFactory("worker", true));
    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 MasterServerInitializer());

        ChannelFuture future = b.bind(CommonConstants.SERVER_PORT).sync();
        LOGGER.info("MasterServer Startup at port:{}",CommonConstants.SERVER_PORT);

        // 等待服务端Socket关闭
        future.channel().closeFuture().sync();
    } catch (InterruptedException e) {
        LOGGER.error("InterruptedException:",e);
    } finally {
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}

public void start() {
    EventLoopGroup bossGroup = new NioEventLoopGroup(CommonConstants.BOSS_GROUP_SIZE, new DefaultThreadFactory("boss", true));
    EventLoopGroup workerGroup = new NioEventLoopGroup(CommonConstants.WORKER_GROUP_SIZE, new DefaultThreadFactory("worker", true));
    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());

        ChannelFuture future = b.bind(CommonConstants.SERVER_PORT).sync();
        logger.info("NettyServer Startup at port:{}",CommonConstants.SERVER_PORT);

        // 等待服务端Socket关闭
        future.channel().closeFuture().sync();
    } catch (InterruptedException e) {
        logger.error("InterruptedException:",e);
    } finally {
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}

@Override
public void bind(int port) {
    EventLoopGroup bossGroup = new NioEventLoopGroup(1);  
    EventLoopGroup workerGroup = new NioEventLoopGroup();  
    ServerBootstrap bootstrap = new ServerBootstrap()
            .group(bossGroup, workerGroup)
            .channel(NioServerSocketChannel.class).localAddress(new InetSocketAddress(8888))
            .childHandler(new ChannelInitializer<SocketChannel>() {

                @Override
                protected void initChannel(SocketChannel ch) throws Exception {
                    ch.pipeline().addLast(new Encoder(serializer), new Decoder(serializer), new ProviderHandler());
                }

            });

    bootstrap.bind(port);
}

@Override
public void start() throws Exception {
    try {
        ServerBootstrap b = new ServerBootstrap()
                .group(bossGroup, workGroup)
                .channel(NioServerSocketChannel.class)
                .childHandler(serverInitializer);

        logger.info("Starting TcpChatServer... Port: " + port);

        channelFuture = b.bind(port).sync();

    } finally {
        Runtime.getRuntime().addShutdownHook(new Thread() {
            @Override
            public void run() {
                shutdown();
            }
        });
    }
}

@Override
public void start() throws Exception {
    try {
        ServerBootstrap b = new ServerBootstrap()
                .group(bossGroup, workGroup)
                .channel(NioServerSocketChannel.class)
                .childHandler(serverInitializer);

        logger.info("Starting WebSocketChatServer... Port: " + port);

        channelFuture = b.bind(port).sync();
    } finally {
        Runtime.getRuntime().addShutdownHook(new Thread() {
            @Override
            public void run() {
                shutdown();
            }
        });
    }
}

private NettyServer(){
    pGroup = new NioEventLoopGroup();
    cGroup = new NioEventLoopGroup();
    serverBootstrap = new ServerBootstrap();
    serverBootstrap.group(pGroup, cGroup)
     .channel(NioServerSocketChannel.class)
     .option(ChannelOption.SO_BACKLOG, 1024)
     //设置日志
     .handler(new LoggingHandler(LogLevel.INFO))
     .childHandler(new ChannelInitializer<SocketChannel>() {
        protected void initChannel(SocketChannel sc) throws Exception {
            sc.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingDecoder());
            sc.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingEncoder());
            sc.pipeline().addLast(new ReadTimeoutHandler(60));
            sc.pipeline().addLast(new NettyServerHandler());
        }
    });     
}

public static void main(String[] args) throws Exception {

        EventLoopGroup bossGroup = new NioEventLoopGroup(1);
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup)
                .channel(NioServerSocketChannel.class)
                .option(ChannelOption.SO_REUSEADDR, true)
                .childHandler(new ChannelInitializer<NioSocketChannel>() {
                    @Override
                    protected void initChannel(NioSocketChannel ch) throws Exception {
                        ch.pipeline().addLast(new SimpleServerHandler());
                    }
                });
        b.bind(8090).sync().channel().closeFuture().sync();
    }

protected AbstractNettyServer(String serverName) {
    this.serverName = Objects.requireNonNull(serverName, "server name");
    bootstrap = new ServerBootstrap();
    if (Epoll.isAvailable()) {
        bootstrap.option(ChannelOption.SO_BACKLOG, 1024).channel(EpollServerSocketChannel.class)
                .childOption(ChannelOption.SO_LINGER, 0).childOption(ChannelOption.SO_REUSEADDR, true)
                .childOption(ChannelOption.SO_KEEPALIVE, true);
        log.info(serverName + " epoll init");
    } else {
        bootstrap.channel(NioServerSocketChannel.class);
        log.info(serverName + " nio init");
    }
    bootstrap.group(bossGroup, workerGroup).option(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT)
            .childOption(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT)
            .childOption(ChannelOption.TCP_NODELAY, true).childHandler(new ChannelInitializer<SocketChannel>() {

                @Override
                protected void initChannel(SocketChannel ch) throws Exception {
                    initPipeline(ch.pipeline());
                }
            });
}

@Override
public void start(final int port) {
    bossGroup = new NioEventLoopGroup(bossGroupThreads);
    workerGroup = new NioEventLoopGroup(workerGroupThreads);
    ServerBootstrap serverBootstrap = new ServerBootstrap();
    try {
    serverBootstrap
        .group(bossGroup, workerGroup)
        .channel(NioServerSocketChannel.class)
        .option(ChannelOption.SO_BACKLOG, backlogSize)
        .childOption(ChannelOption.SO_KEEPALIVE, true)
        .childOption(ChannelOption.TCP_NODELAY, true)
        .childHandler(serializeType.getServerChannelInitializer().newInstance());
        channel = serverBootstrap.bind(port).sync().channel();
    } catch (final Exception ex) {
        throw new ServerException(Server.SYSTEM_MESSAGE_ID, ex);
    }
}

public void doOpen() throws InterruptedException {
    EventLoopGroup bossGroup = new NioEventLoopGroup();
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    try{
        ServerBootstrap serverBootstrap = new ServerBootstrap();
        serverBootstrap.group(bossGroup,workerGroup);
        serverBootstrap.channel(NioServerSocketChannel.class);
        serverBootstrap.childHandler(new ChannelInitializer<SocketChannel>() {
            protected void initChannel(SocketChannel socketChannel) throws Exception {
                ChannelPipeline pipeline = socketChannel.pipeline();
                pipeline.addLast(new ObjectDecoder(1024*1024, ClassResolvers.weakCachingConcurrentResolver(this.getClass().getClassLoader())));
                pipeline.addLast(new ObjectEncoder());
                pipeline.addLast((SimpleChannelInboundHandler)handler);
            }
        });
        serverBootstrap.option(ChannelOption.SO_BACKLOG,1024);
        serverBootstrap.childOption(ChannelOption.SO_KEEPALIVE,true);
        ChannelFuture future = serverBootstrap.bind(address,port).sync();
        //future.channel().closeFuture().sync();
    }finally{
        //workerGroup.shutdownGracefully();
        //bossGroup.shutdownGracefully();
    }
}

/**
 * 启动服务
 *
 * @throws Exception 异常
 */
public void start() throws Exception {
    try {
        ServerBootstrap bootstrap = new ServerBootstrap();
        bootstrap.group(bossGroup, workerGroup)
                .channel(NioServerSocketChannel.class)
                .childHandler(channelInitializer)
                .option(ChannelOption.SO_BACKLOG, aceServerConfig.getBackSize())
                .childOption(ChannelOption.SO_KEEPALIVE, true)
                .childOption(ChannelOption.ALLOCATOR, PooledByteBufAllocator.DEFAULT);
        ChannelFuture future = bootstrap.bind(aceServerConfig.getPort()).sync();
        System.out.println("ace server starter on port : " + aceServerConfig.getPort());
        future.channel().closeFuture().sync();
    } finally {
        close();
    }


}

public Receiver ( final ReceiverHandlerFactory factory, final SocketAddress addr )
{
    this.factory = factory;

    this.bossGroup = new NioEventLoopGroup ();
    this.workerGroup = new NioEventLoopGroup ();
    this.bootstrap = new ServerBootstrap ();
    this.bootstrap.group ( this.bossGroup, this.workerGroup );
    this.bootstrap.channel ( NioServerSocketChannel.class );
    this.bootstrap.option ( ChannelOption.SO_BACKLOG, 5 );
    this.bootstrap.option ( ChannelOption.SO_REUSEADDR, true );
    this.bootstrap.childHandler ( new ChannelInitializer<SocketChannel> () {

        @Override
        protected void initChannel ( final SocketChannel ch ) throws Exception
        {
            handleInitChannel ( ch );
        }
    } );

    this.channel = this.bootstrap.bind ( addr ).channel ();

    logger.info ( "Receiver running ..." );
}

@Override
public synchronized void start() {
    bossGroup = new NioEventLoopGroup(); // (1)
    workerGroup = new NioEventLoopGroup();
    try {
        b = new ServerBootstrap(); // (2)
        b.group(bossGroup, workerGroup)
                .channel(NioServerSocketChannel.class)
                .option(ChannelOption.SO_BACKLOG, 100)
                .handler(new LoggingHandler(LogLevel.INFO))
                .childHandler(new SocketServerChannelInitializer(heartTime,socketService,applicationContext));
        // Bind and start to accept incoming connections.
        b.bind(port);

        logger.info("socket: "+port+" starting....");
        // Wait until the server socket is closed.
        // In this example, this does not happen, but you can do that to gracefully
    } catch (Exception e) {
        e.printStackTrace();
    }
}

private ChannelFuture bindToPlainSocket() throws InterruptedException {
    String hostname = configuration.getHostName();
    int port = Integer.parseInt(configuration.getPlain().getPort());

    ServerBootstrap b = new ServerBootstrap();
    b.group(bossGroup, workerGroup)
            .channel(NioServerSocketChannel.class)
            .childHandler(new SocketChannelInitializer(ioExecutors))
            .option(ChannelOption.SO_BACKLOG, 128)
            .childOption(ChannelOption.SO_KEEPALIVE, true);

    // Bind and start to accept incoming connections.
    ChannelFuture future = b.bind(hostname, port).sync();
    LOGGER.info("Listening AMQP on " + hostname + ":" + port);
    return future;
}

private ChannelFuture bindToSslSocket()
        throws InterruptedException, CertificateException, UnrecoverableKeyException, NoSuchAlgorithmException,
        KeyStoreException, KeyManagementException, IOException {
    String hostname = configuration.getHostName();
    int port = Integer.parseInt(configuration.getSsl().getPort());

    ServerBootstrap b = new ServerBootstrap();
    b.group(bossGroup, workerGroup)
     .channel(NioServerSocketChannel.class)
     .childHandler(new SslSocketChannelInitializer(ioExecutors, new SslHandlerFactory(configuration)))
     .option(ChannelOption.SO_BACKLOG, 128)
     .childOption(ChannelOption.SO_KEEPALIVE, true);

    // Bind and start to accept incoming connections.
    ChannelFuture future = b.bind(hostname, port).sync();
    LOGGER.info("Listening AMQP/" + configuration.getSsl().getProtocol() + " on " + hostname + ":" + port);
    return future;
}

public void run() {
    try {
        // Configure the server.
        EventLoopGroup group = new NioEventLoopGroup();
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.option(ChannelOption.SO_BACKLOG, 1024);
            b.group(group)
                    .channel(NioServerSocketChannel.class)
                    .handler(new LoggingHandler(LogLevel.INFO))
                    .childHandler(new Http2ServerInitializer(mSslCtx));

            sServerChannel = b.bind(PORT).sync().channel();
            Log.i(TAG, "Netty HTTP/2 server started on " + getServerUrl());
            sBlock.open();
            sServerChannel.closeFuture().sync();
        } finally {
            group.shutdownGracefully();
        }
        Log.i(TAG, "Stopped Http2TestServerRunnable!");
    } catch (Exception e) {
        Log.e(TAG, e.toString());
    }
}

public void start() {
    bossGroup = new NioEventLoopGroup();
    workerGroup = new NioEventLoopGroup();

    ServerBootstrap bootstrap = new ServerBootstrap();
    bootstrap
            .group(bossGroup, workerGroup)
            .channel(NioServerSocketChannel.class)
            .option(ChannelOption.SO_BACKLOG, 1024)
            .childOption(ChannelOption.SO_KEEPALIVE, true)
            .childHandler(new PlayerInitializer(this));

    try {
        channel = bootstrap.bind(server.getConfig().get("server.port").getAsShort()).sync().channel();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

public void start() throws InterruptedException {
    EventLoopGroup acceptors = new NioEventLoopGroup(socksProperties.getAcceptors());
    EventLoopGroup workers = new NioEventLoopGroup();
    EventLoopGroup forwarders = new NioEventLoopGroup();
    try {
        ServerBootstrap bootstrap = new ServerBootstrap();
        bootstrap.group(acceptors, workers)
                .channel(NioServerSocketChannel.class)
                .option(ChannelOption.SO_BACKLOG, socksProperties.getBacklog())
                .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, socksProperties.getConnectTimeoutMillis())
                .childHandler(new Socks5WorkerChannelInitializer(socksProperties, forwarders));

        Address address = socksProperties.getListen();
        ChannelFuture future = bootstrap.bind(address.getHost(), address.getPort()).sync();
        future.channel().closeFuture().sync();
    } finally {
        forwarders.shutdownGracefully();
        workers.shutdownGracefully();
        acceptors.shutdownGracefully();
    }
}

@Override
public void run(String... args) throws Exception {
    NioEventLoopGroup group = new NioEventLoopGroup();
    ServerBootstrap bootstrap = new ServerBootstrap();
    bootstrap.group(group)
            .channel(NioServerSocketChannel.class)
            .childHandler(serverChannelInitializer);
    ChannelFuture channelFuture = bootstrap.bind(new InetSocketAddress(30232));
    channelFuture.addListener(future -> {
        if (future.isSuccess()) {
            logger.info("「Netty」服务器启动成功");
        } else {
            logger.info("「Netty」服务器启动失败");
        }
    });
}

public static void main(String[] args) throws Exception {
    EventLoopGroup bossGroup = new NioEventLoopGroup();
       EventLoopGroup workerGroup = new NioEventLoopGroup();

       try{
           ServerBootstrap serverBootstrap = new ServerBootstrap();
           serverBootstrap.group(bossGroup,workerGroup)
                .channel(NioServerSocketChannel.class)
                .childHandler(new HttpServer());
           ChannelFuture channelFuture = serverBootstrap
                .bind(new InetSocketAddress("0.0.0.0", PORT))
                .sync();
           channelFuture.channel().closeFuture().sync();
       } finally {
           bossGroup.shutdownGracefully();
           workerGroup.shutdownGracefully();
       }
}

public void start() {
    ServerBootstrap b = new ServerBootstrap();

    b.group(workerGroup)
            .channel(NioServerSocketChannel.class)
            .option(ChannelOption.SO_KEEPALIVE, true)
            .childHandler(new ChannelInitializer<SocketChannel>() {
                @Override
                protected void initChannel(SocketChannel socketChannel) throws Exception {
                    System.out.println("New client connected! (" + socketChannel.localAddress() + ")");

                    socketChannel.pipeline().addLast(new StringEncoder()).addLast(new StringEncoder()).addLast(new EchoServerHandler());
                }
            });

    f = b.bind(port);
}

private void startServer() throws Exception {

        Runtime.getRuntime().addShutdownHook(new Thread(this::shutdown));

        try {

            ServerBootstrap bootstrap = new ServerBootstrap();

            bootstrap.group(masterGroup, slaveGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new HttpServerInitializer(razor))
                    .option(ChannelOption.SO_BACKLOG, 128)
                    .childOption(ChannelOption.SO_KEEPALIVE, true);

            this.channel = bootstrap.bind(env.get(ENV_KEY_SERVER_HOST, DEFAULT_SERVER_HOST), env.getInt(ENV_KEY_SERVER_PORT, DEFAULT_SERVER_PORT)).sync().channel();
            log.info("{} started and listen on {}", HttpServerHandler.class.getName(), channel.localAddress());
        } catch (final InterruptedException e){

            log.error("Netty server startup failed, error: {}", e.getMessage());
        }
    }

public void start(){
    ServerBootstrap bootstrap = new ServerBootstrap();
    bootstrap.group(workerGroup,bossGroup)
            .channel(NioServerSocketChannel.class)
            .childHandler(new TCPHandlerInitializer(this))
            .option(ChannelOption.SO_BACKLOG, 512)
            .childOption(ChannelOption.SO_KEEPALIVE, true);
    Channel serverChannel = bootstrap.bind(new InetSocketAddress(port)).channel();
    ChannelFuture future = serverChannel.closeFuture();
    try {
        System.out.println("MQTT服务器已启动...");
        future.sync();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

@Override
public void init() {
    super.init();
    b.group(bossGroup, workGroup)
            .channel(NioServerSocketChannel.class)
            .option(ChannelOption.SO_KEEPALIVE, true)
            .option(ChannelOption.TCP_NODELAY, true)
            .option(ChannelOption.SO_BACKLOG, 1024)
            .localAddress(new InetSocketAddress(port))
            .childHandler(new ChannelInitializer<SocketChannel>() {

                @Override
                protected void initChannel(SocketChannel ch) throws Exception {
                    ch.pipeline().addLast(defLoopGroup,
                            new SdkServerDecoder(12),  // 自定义解码器
                            new SdkServerEncoder(),    // 自定义编码器
                            new SdkServerHandler(snowFlake) // 自定义处理器
                    );
                }
            });
}

public void start() {

        EventLoopGroup boss = new NioEventLoopGroup(1);
        EventLoopGroup worker = new NioEventLoopGroup();
        try {
            ServerBootstrap bootstrap = new ServerBootstrap();
            bootstrap.group(boss,worker)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new HttpChannelInitializer(list));
            ChannelFuture future = bootstrap.bind(port).sync();
            log.info("start listen in port {}", port);
            future.channel().closeFuture().sync();
        } catch (Exception e ) {
            e.printStackTrace();
        } finally {
            boss.shutdownGracefully();
            worker.shutdownGracefully();
        }
    }

/**
 *@description 监听指定端口
 *@time 创建时间:2017年7月21日下午3:50:26
 *@param port
 *@throws InterruptedException
 *@author dzn
 */
public void bind(int port) throws InterruptedException{
    EventLoopGroup bossGroup = new NioEventLoopGroup();
    EventLoopGroup workGroup = new NioEventLoopGroup();
    try{
        ServerBootstrap server = new ServerBootstrap();
        server.group(bossGroup, workGroup)
            .channel(NioServerSocketChannel.class)
            .option(ChannelOption.SO_BACKLOG, 1024)
            .childHandler(new ChildChannelHandler());
        ChannelFuture cf = server.bind(port).sync();
        System.out.println("服务器已启动, 监控端口号为 : " + port);
        cf.channel().closeFuture().sync();
    }finally{
        bossGroup.shutdownGracefully();
        workGroup.shutdownGracefully();
    }
}

/**
 *@description 监听指定端口
 *@time 创建时间:2017年7月21日下午3:50:26
 *@param port
 *@throws InterruptedException
 *@author dzn
 */
public void bind(int port) throws InterruptedException{
    //分配任务线程池
    EventLoopGroup bossGroup = new NioEventLoopGroup();

    //执行任务线程池
    EventLoopGroup workGroup = new NioEventLoopGroup();
    try{
        //netty Server端
        ServerBootstrap server = new ServerBootstrap();
        server.group(bossGroup, workGroup)
            .channel(NioServerSocketChannel.class)
            .option(ChannelOption.SO_BACKLOG, 1024)
            .childHandler(new ChildChannelHandler());

        //启动netty服务器
        ChannelFuture cf = server.bind(port).sync();
        System.out.println("服务器已启动, 监控端口号为 : " + port);

        //等待服务器端关闭
        cf.channel().closeFuture().sync();
    }finally{
        bossGroup.shutdownGracefully();
        workGroup.shutdownGracefully();
    }
}

/**
 *@description 监听指定端口
 *@time 创建时间:2017年7月21日下午3:50:26
 *@param port
 *@throws InterruptedException
 *@author dzn
 */
public void bind(int port) throws InterruptedException{
    EventLoopGroup bossGroup = new NioEventLoopGroup();
    EventLoopGroup workGroup = new NioEventLoopGroup();
    try{
        ServerBootstrap server = new ServerBootstrap();
        server.group(bossGroup, workGroup)
            .channel(NioServerSocketChannel.class)
            .option(ChannelOption.SO_BACKLOG, 1024)
            .childHandler(new ChildChannelHandler());
        ChannelFuture cf = server.bind(port).sync();
        System.out.println("服务器已启动, 监控端口号为 : " + port);
        cf.channel().closeFuture().sync();
    }finally{
        bossGroup.shutdownGracefully();
        workGroup.shutdownGracefully();
    }
}

@Override
public void start(Config config) throws Exception {
    EventLoopGroup bossGroup = new NioEventLoopGroup(1);
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    int port = config.getPort();
    try {
        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup)
                .channel(NioServerSocketChannel.class)
                .option(ChannelOption.SO_BACKLOG, 1024)
                .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 1000)
                .childHandler(new SocksServerInitializer(config));

        log.info("Socks5 server bind port: {}", port);

        b.bind(port).sync().channel().closeFuture().sync();
    } finally {
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}