Netty心跳检测

Netty提供了一个handler (IdleStateHandler) 可以很方便的来实现心跳检测机制，而心跳检测机制是分布式里面服务存活状态的一种检测机制，非常的重要。

   

public class NettyServer {

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

        NioEventLoopGroup bossGroup = new NioEventLoopGroup(1);
        NioEventLoopGroup workerGroup = new NioEventLoopGroup();

        try {

            ServerBootstrap serverBootstrap = new ServerBootstrap();
            serverBootstrap.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .handler(new LoggingHandler())
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel socketChannel) throws Exception {
                            ChannelPipeline pipeline = socketChannel.pipeline();
                            pipeline.addLast(new IdleStateHandler(3, 5, 7, TimeUnit.SECONDS));