Java Code Examples for io.netty.channel.EventLoopGroup#shutdownGracefully()

public static void main(String[] args) throws Exception {
    ResourceLeakDetector.setLevel(ResourceLeakDetector.Level.valueOf(leakDetectorLevel.toUpperCase()));

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

    try {
        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup,workerGroup)
                .channel(NioServerSocketChannel.class)
                .handler(new LoggingHandler(LogLevel.INFO))
                .childHandler(new CustomProtocolInitializer(maxPayloadSize));
        ChannelFuture f = b.bind(PORT);
        f.channel().closeFuture().sync();
    } finally {
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}
 

@Test
public void testTooManyAcceptedChannels() throws Exception {
    EventLoopGroup g = new OioEventLoopGroup(1);
    ServerBootstrap sb = new ServerBootstrap();
    sb.channel(OioServerSocketChannel.class);
    sb.group(g);
    sb.childHandler(new ChannelInboundHandlerAdapter());
    ChannelFuture f1 = sb.bind(0);
    f1.sync();

    Socket s = new Socket(NetUtil.LOCALHOST, ((InetSocketAddress) f1.channel().localAddress()).getPort());
    assertThat(s.getInputStream().read(), is(-1));
    s.close();

    g.shutdownGracefully();
}
 

public static void main(String[] args) throws Exception {
    // Configure the server.
    EventLoopGroup bossGroup = new NioEventLoopGroup(1);
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    try {
        ServerBootstrap b = new ServerBootstrap();
        b.option(ChannelOption.SO_BACKLOG, 1024);
        b.childOption(ChannelOption.TCP_NODELAY,true);
        b.childOption(ChannelOption.SO_KEEPALIVE,true);
        b.group(bossGroup, workerGroup)
                .channel(NioServerSocketChannel.class)
                .handler(new LoggingHandler(LogLevel.INFO))
                .childHandler(new HttpHelloWorldServerInitializer());

        Channel ch = b.bind(PORT).sync().channel();
        logger.info("Netty http server listening on port "+ PORT);
        ch.closeFuture().sync();
    } finally {
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}
 

public static void main(String[] args) throws Exception {
    // Configure SSL.
    final SslContext sslCtx;
    if (SSL) {
        SelfSignedCertificate ssc = new SelfSignedCertificate();
        sslCtx = SslContext.newServerContext(ssc.certificate(), ssc.privateKey());
    } else {
        sslCtx = null;
    }

    EventLoopGroup bossGroup = new NioEventLoopGroup(1);
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    try {
        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup)
         .channel(NioServerSocketChannel.class)
         .handler(new LoggingHandler(LogLevel.INFO))
         .childHandler(new HttpCorsServerInitializer(sslCtx));

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

public static void main(String[] args) throws Exception {
    SelfSignedCertificate ssc = new SelfSignedCertificate();
    SslContext sslCtx = SslContext.newServerContext(ssc.certificate(), ssc.privateKey());

    EventLoopGroup bossGroup = new NioEventLoopGroup(1);
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    try {
        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup)
         .channel(NioServerSocketChannel.class)
         .handler(new LoggingHandler(LogLevel.INFO))
         .childHandler(new SecureChatServerInitializer(sslCtx));

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

public static void main(String[] args) throws Exception {
    // Configure SSL context
    SelfSignedCertificate ssc = new SelfSignedCertificate();
    final SslContext sslCtx = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey())
        .build();

    EventLoopGroup bossGroup = new NioEventLoopGroup(1);
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    try {
        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup)
         .channel(NioServerSocketChannel.class)
         .handler(new LoggingHandler(LogLevel.INFO))
         .childHandler(new ChannelInitializer<SocketChannel>() {
            @Override
            public void initChannel(SocketChannel ch) throws Exception {
                ch.pipeline().addLast(new PortUnificationServerHandler(sslCtx));
            }
        });

        // Bind and start to accept incoming connections.
        b.bind(PORT).sync().channel().closeFuture().sync();
    } finally {
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}
 

public static void main(String[] args) throws Exception {
    // Configure SSL.
    final SslContext sslCtx;
    if (SSL) {
        SelfSignedCertificate ssc = new SelfSignedCertificate();
        sslCtx = SslContext.newServerContext(ssc.certificate(), ssc.privateKey());
    } else {
        sslCtx = null;
    }

    // Configure the server.
    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 HttpHelloWorldServerInitializer(sslCtx));

        Channel ch = b.bind(PORT).sync().channel();

        System.err.println("Open your web browser and navigate to " +
                (SSL? "https" : "http") + "://127.0.0.1:" + PORT + '/');

        ch.closeFuture().sync();
    } finally {
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}
 

public void start(InetSocketAddress address){
    EventLoopGroup bossGroup = new NioEventLoopGroup(1);
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    try {
    	//重置客户端状态
    	List<Client> clientList = clientMapper.selectClientList(new Client());
    	for(Client client:clientList){
    		client.setStatus(1);
    		client.setRemark("服务端启动重新初始化");
    		clientMapper.updateClient(client);
    	}
    	
        ServerBootstrap bootstrap = new ServerBootstrap()
                .group(bossGroup,workerGroup)
                .channel(NioServerSocketChannel.class)
                .childOption(ChannelOption.SO_KEEPALIVE, true)
                .option(ChannelOption.SO_BACKLOG, 1024)
                .childHandler(serverChannelInitializer);
        // 绑定端口，开始接收进来的连接
        ChannelFuture future = bootstrap.bind(address).sync();
        log.info("服务端启动成功，监听端口 " + address.getPort());
        future.channel().closeFuture().sync();
    } catch (Exception e) {
        e.printStackTrace();
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}
 

public static void main(String[] args) throws Exception {
    // Configure SSL.
    final SslContext sslCtx;
    if (SSL) {
        SelfSignedCertificate ssc = new SelfSignedCertificate();
        sslCtx = SslContext.newServerContext(SslProvider.JDK, ssc.certificate(), ssc.privateKey());
    } else {
        sslCtx = null;
    }

    EventLoopGroup bossGroup = new NioEventLoopGroup(1);
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    try {
        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup)
         .channel(NioServerSocketChannel.class)
         .handler(new LoggingHandler(LogLevel.INFO))
         .childHandler(new HttpStaticFileServerInitializer(sslCtx));

        Channel ch = b.bind(PORT).sync().channel();

        System.err.println("Open your web browser and navigate to " +
                (SSL? "https" : "http") + "://127.0.0.1:" + PORT + '/');

        ch.closeFuture().sync();
    } finally {
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}
 

public void run(final int port) 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>() {
                    @Override
                    protected void initChannel(SocketChannel ch)
                            throws Exception {
                        ch.pipeline().addLast("http-decoder",
                                new HttpRequestDecoder());
                        ch.pipeline().addLast("http-aggregator",
                                new HttpObjectAggregator(65536));
                        ch.pipeline()
                                .addLast(
                                        "xml-decoder",
                                        new HttpXmlRequestDecoder(
                                                Order.class, true));
                        ch.pipeline().addLast("http-encoder",
                                new HttpResponseEncoder());
                        ch.pipeline().addLast("xml-encoder",
                                new HttpXmlResponseEncoder());
                        ch.pipeline().addLast("xmlServerHandler",
                                new HttpXmlServerHandler());
                    }
                });
        ChannelFuture future = b.bind(new InetSocketAddress(port)).sync();
        System.out.println("HTTP订购服务器启动，网址是 : " + "http://localhost:"
                + port);
        future.channel().closeFuture().sync();
    } finally {
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}
 

public static void main(String[] args) throws Exception {
    // Configure the server.
    EventLoopGroup group = new NioEventLoopGroup();
    try {
        UkcpServerBootstrap b = new UkcpServerBootstrap();
        b.group(group)
                .channel(UkcpServerChannel.class)
                .childHandler(new ChannelInitializer<UkcpChannel>() {
                    @Override
                    public void initChannel(UkcpChannel ch) throws Exception {
                        ChannelPipeline p = ch.pipeline();
                        p.addLast(new KcpRttServerHandler());
                    }
                });
        ChannelOptionHelper.nodelay(b, true, 20, 2, true)
                .childOption(UkcpChannelOption.UKCP_MTU, 512);

        // Start the server.
        ChannelFuture f = b.bind(PORT).sync();

        // Wait until the server socket is closed.
        f.channel().closeFuture().sync();
    } finally {
        // Shut down all event loops to terminate all threads.
        group.shutdownGracefully();
    }
}
 

protected void execute(){
	if(clientHandler == null){
		throw new IllegalArgumentException("clientHandler is NULL, please define a tcpClientChannelHandler !");
	}
	
	// Configure the client.
    EventLoopGroup group = new NioEventLoopGroup();
    try {
        Bootstrap b = new Bootstrap();
        b.group(group)
         .channel(NioSocketChannel.class)
         .option(ChannelOption.TCP_NODELAY, true)
         // Configure the connect timeout option.
         .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000)
         .handler(new ChannelInitializer<SocketChannel>() {
             @Override
             public void initChannel(SocketChannel ch) throws Exception {
                 ChannelPipeline p = ch.pipeline();
                 // Decoder
                 p.addLast("stringDecoder", new StringDecoder(CharsetUtil.UTF_8));

                 // Encoder
                 p.addLast("stringEncoder", new StringEncoder(CharsetUtil.UTF_8));  
                 
                 // the handler for client
                 p.addLast(clientHandler);
             }
         });

        // Start the client.
        ChannelFuture f = b.connect(host, port).sync();
                              
        // Wait until the connection is closed.
        f.channel().closeFuture().sync();            
    } catch (Exception e){   
        e.printStackTrace();
    } finally {
        // Shut down the event loop to terminate all threads.        	
        group.shutdownGracefully();
    }
}
 

protected void execute(){
	if(clientHandler == null){
		throw new IllegalArgumentException("clientHandler is NULL, please define a tcpClientChannelHandler !");
	}
	
	// Configure the client.
    EventLoopGroup group = new NioEventLoopGroup();
    try {
        Bootstrap b = new Bootstrap();
        b.group(group)
         .channel(NioSocketChannel.class)
         .option(ChannelOption.TCP_NODELAY, true)
         // Configure the connect timeout option.
         .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000)
         .handler(new ChannelInitializer<SocketChannel>() {
             @Override
             public void initChannel(SocketChannel ch) throws Exception {
                 ChannelPipeline p = ch.pipeline();
                 // Decoder
                 p.addLast("stringDecoder", new StringDecoder(CharsetUtil.UTF_8));

                 // Encoder
                 p.addLast("stringEncoder", new StringEncoder(CharsetUtil.UTF_8));  
                 
                 // the handler for client
                 p.addLast(clientHandler);
             }
         });

        // Start the client.
        ChannelFuture f = b.connect(HOST, PORT).sync();
                              
        // Wait until the connection is closed.
        f.channel().closeFuture().sync();            
    } catch (Exception e){   
        e.printStackTrace();
    } finally {
        // Shut down the event loop to terminate all threads.        	
        group.shutdownGracefully();
    }
}
 

@Test
public void waitUntilActiveHandler_firesNegotiation() throws Exception {
  EventLoopGroup elg = new DefaultEventLoopGroup(1);
  SocketAddress addr = new LocalAddress("addr");
  final AtomicReference<Object> event = new AtomicReference<>();
  ChannelHandler next = new ChannelInboundHandlerAdapter() {
    @Override
    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) {
      event.set(evt);
      ctx.close();
    }
  };
  Channel s = new ServerBootstrap()
      .childHandler(new ChannelInboundHandlerAdapter())
      .group(elg)
      .channel(LocalServerChannel.class)
      .bind(addr)
      .sync()
      .channel();
  Channel c = new Bootstrap()
      .handler(new WaitUntilActiveHandler(next))
      .channel(LocalChannel.class).group(group)
      .connect(addr)
      .sync()
      .channel();
  c.pipeline().fireUserEventTriggered(ProtocolNegotiationEvent.DEFAULT);
  SocketAddress localAddr = c.localAddress();
  ProtocolNegotiationEvent expectedEvent = ProtocolNegotiationEvent.DEFAULT
      .withAttributes(
          Attributes.newBuilder()
              .set(Grpc.TRANSPORT_ATTR_LOCAL_ADDR, localAddr)
              .set(Grpc.TRANSPORT_ATTR_REMOTE_ADDR, addr)
              .set(GrpcAttributes.ATTR_SECURITY_LEVEL, SecurityLevel.NONE)
              .build());

  c.closeFuture().sync();
  assertThat(event.get()).isInstanceOf(ProtocolNegotiationEvent.class);
  ProtocolNegotiationEvent actual = (ProtocolNegotiationEvent) event.get();
  assertThat(actual).isEqualTo(expectedEvent);

  s.close();
  elg.shutdownGracefully();
}
 

@Override
public void close(EventLoopGroup instance) {
  instance.shutdownGracefully(0, 0, TimeUnit.SECONDS);
}
 

public static void main(String[] args) throws Exception {
    // Configure SSL.
    final SslContext sslCtx = SslContext.newClientContext(InsecureTrustManagerFactory.INSTANCE);

    EventLoopGroup group = new NioEventLoopGroup();
    try {
        Bootstrap b = new Bootstrap();
        b.group(group)
         .channel(NioSocketChannel.class)
         .handler(new SecureChatClientInitializer(sslCtx));

        // Start the connection attempt.
        Channel ch = b.connect(HOST, PORT).sync().channel();

        // Read commands from the stdin.
        ChannelFuture lastWriteFuture = null;
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        for (;;) {
            String line = in.readLine();
            if (line == null) {
                break;
            }

            // Sends the received line to the server.
            lastWriteFuture = ch.writeAndFlush(line + "\r\n");

            // If user typed the 'bye' command, wait until the server closes
            // the connection.
            if ("bye".equals(line.toLowerCase())) {
                ch.closeFuture().sync();
                break;
            }
        }

        // Wait until all messages are flushed before closing the channel.
        if (lastWriteFuture != null) {
            lastWriteFuture.sync();
        }
    } finally {
        // The connection is closed automatically on shutdown.
        group.shutdownGracefully();
    }
}
 

public static void newHttpClientBootstrap(String url, ChannelHandler handler) throws Exception{
	URI uri = new URI(url);
	String scheme = uri.getScheme() == null ? "http" : uri.getScheme();
	String host = uri.getHost() == null ? "127.0.0.1" : uri.getHost();
	int port = uri.getPort();
	if (port == -1) {
		if ("http".equalsIgnoreCase(scheme)) {
			port = 80;
		} else if ("https".equalsIgnoreCase(scheme)) {
			port = 443;
		}
	}

	if (!"http".equalsIgnoreCase(scheme)
			&& !"https".equalsIgnoreCase(scheme)) {
		System.err.println("Only HTTP(S) is supported.");
		return;
	}

	// Configure SSL context if necessary.
	final boolean ssl = "https".equalsIgnoreCase(scheme);
	final SslContext sslCtx;
	if (ssl) {
		sslCtx = SslContext.newClientContext(InsecureTrustManagerFactory.INSTANCE);
	} else {
		sslCtx = null;
	}

	// Configure the client.
	EventLoopGroup group = new NioEventLoopGroup();
	try {
		Bootstrap b = new Bootstrap();
		b.group(group).channel(NioSocketChannel.class)
				.handler(new HttpDownloadertInitializer(sslCtx,handler));
		// Make the connection attempt.
		Channel ch = b.connect(host, port).sync().channel();
		// Prepare the HTTP request.
		HttpRequest request = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.GET, uri.getRawPath());
		HttpHeaders headers = request.headers();
		headers.set(HttpHeaders.Names.HOST, host);
		headers.set(HttpHeaders.Names.CONNECTION,HttpHeaders.Values.CLOSE);
		headers.set(HttpHeaders.Names.ACCEPT_ENCODING,HttpHeaders.Values.GZIP);
		// Set some example cookies.
		headers.set(HttpHeaders.Names.COOKIE, ClientCookieEncoder.encode(new DefaultCookie("my-cookie", "foo")));
		ch.writeAndFlush(request);
		// Wait for the server to close the connection.
		ch.closeFuture().sync();
		Thread.sleep(1000);
	} finally {
		// Shut down executor threads to exit.
		group.shutdownGracefully();
	}	
}
 

public static void main(String[] args) throws Exception {
    // Configure SSL.
    final SslContext sslCtx;
    if (SSL) {
        SslProvider provider = OpenSsl.isAlpnSupported() ? SslProvider.OPENSSL : SslProvider.JDK;
        SelfSignedCertificate ssc = new SelfSignedCertificate();
        sslCtx = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey())
            .sslProvider(provider)
            /* NOTE: the cipher filter may not include all ciphers required by the HTTP/2 specification.
             * Please refer to the HTTP/2 specification for cipher requirements. */
            .ciphers(Http2SecurityUtil.CIPHERS, SupportedCipherSuiteFilter.INSTANCE)
            .applicationProtocolConfig(new ApplicationProtocolConfig(
                Protocol.ALPN,
                // NO_ADVERTISE is currently the only mode supported by both OpenSsl and JDK providers.
                SelectorFailureBehavior.NO_ADVERTISE,
                // ACCEPT is currently the only mode supported by both OpenSsl and JDK providers.
                SelectedListenerFailureBehavior.ACCEPT,
                ApplicationProtocolNames.HTTP_2,
                ApplicationProtocolNames.HTTP_1_1))
            .build();
    } else {
        sslCtx = null;
    }
    // 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(sslCtx));

        Channel ch = b.bind(PORT).sync().channel();

        System.err.println("Open your HTTP/2-enabled web browser and navigate to " +
                (SSL? "https" : "http") + "://127.0.0.1:" + PORT + '/');

        ch.closeFuture().sync();
    } finally {
        group.shutdownGracefully();
    }
}
 

public static void main(String[] args) throws Exception {
    // Configure SSL.
    final SslContext sslCtx;
    if (SSL) {
        SelfSignedCertificate ssc = new SelfSignedCertificate();
        sslCtx = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey()).build();
    } else {
        sslCtx = null;
    }

    // Configure the server.
    EventLoopGroup bossGroup = new NioEventLoopGroup(1);
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    try {
        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup)
         .channel(NioServerSocketChannel.class)
         .option(ChannelOption.SO_BACKLOG, 100)
         .handler(new LoggingHandler(LogLevel.INFO))
         .childHandler(new ChannelInitializer<SocketChannel>() {
             @Override
             public void initChannel(SocketChannel ch) throws Exception {
                 ChannelPipeline p = ch.pipeline();
                 if (sslCtx != null) {
                     p.addLast(sslCtx.newHandler(ch.alloc()));
                 }
                 //p.addLast(new LoggingHandler(LogLevel.INFO));
                 p.addLast(new EchoServerHandler());
             }
         });

        // Start the server.
        ChannelFuture f = b.bind(PORT).sync();

        // Wait until the server socket is closed.
        f.channel().closeFuture().sync();
    } finally {
        // Shut down all event loops to terminate all threads.
        bossGroup.shutdownGracefully();
        workerGroup.shutdownGracefully();
    }
}
 

protected void execute(){
	if(clientHandler == null){
		throw new IllegalArgumentException("clientHandler is NULL, please define a tcpClientChannelHandler !");
	}
	
	// Configure the client.
    EventLoopGroup group = new NioEventLoopGroup();
    try {
        Bootstrap b = new Bootstrap();
        b.group(group)
         .channel(NioSocketChannel.class)
         .option(ChannelOption.TCP_NODELAY, true)
         // Configure the connect timeout option.
         .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000)
         .handler(new ChannelInitializer<SocketChannel>() {
             @Override
             public void initChannel(SocketChannel ch) throws Exception {
                 ChannelPipeline p = ch.pipeline();
                 // Decoder
                 p.addLast("stringDecoder", new StringDecoder(CharsetUtil.UTF_8));

                 // Encoder
                 p.addLast("stringEncoder", new StringEncoder(CharsetUtil.UTF_8));  
                 
                 // the handler for client
                 p.addLast(clientHandler);
             }
         });

        // Start the client.
        ChannelFuture f = b.connect(host, port).sync();
                              
        // Wait until the connection is closed.
        f.channel().closeFuture().sync();            
    } catch (Exception e){   
        e.printStackTrace();
    } finally {
        // Shut down the event loop to terminate all threads.        	
        group.shutdownGracefully();
    }
}