Netty write detection mechanism (heart)

First, create a server

1, MyServer class

public class MyServer {
    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)
                    .handler(new LoggingHandler(LogLevel.INFO)) //增加日志处理器
                    .childHandler(new MyServerInitializer());

            ChannelFuture channelFuture = serverBootstrap.bind(8899).sync();
            channelFuture.channel().closeFuture().sync();
        }finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }
}

　　Increase the log processor

2、MyServerInitializer

public class MyServerInitializer extends ChannelInitializer<SocketChannel>{

    protected void initChannel(SocketChannel socketChannel) throws Exception {
        ChannelPipeline pipeline = socketChannel.pipeline();
        pipeline.addLast(new IdleStateHandler(5, 7, 10, TimeUnit.SECONDS));
        pipeline.addLast(new MyServerHandle());
    }
}

　　5 seconds did not read event

　　7 seconds did not write events

　　10 seconds to read and write no event

3, the processor MyServerHandle

public class MyServerHandle extends ChannelInboundHandlerAdapter  {


    @Override
    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
        if(evt instanceof IdleStateEvent){
            IdleStateEvent event = (IdleStateEvent)evt;

            String eventType = null;

            switch (event.state()){
                case READER_IDLE:
                    eventType = "读空闲";
                    break;
                case WRITER_IDLE:
                    eventType = "写空闲";
                    break;
                case ALL_IDLE:
                    eventType = "读写空闲";
                    break;
            } 

            CommonUtil.println (ctx.channel () of the remoteAddress () + "timeout event:." The eventType +); 
            // close the connection 
            . Ctx.channel () Close (); 
        } 
    } 
}

Second, the client code above a consistent