DotNetty使用之心跳机制

因为DotNetty是从java的Netty框架仿写过来的，介绍的文档特别少，加之官方也没有提供api文档，所以之前一直不理解心跳的用法。最近忙里偷闲，稍稍研究了一番，终于有点明白了。

现在将代码复制上来，留作日后查看（ps:精髓都在代码里）：

Uptime.Client：

public class Program
    {
        const string HOST = "127.0.0.1";
        const int PORT = 8045;
        // Sleep 5 seconds before a reconnection attempt.
        public const int RECONNECT_DELAY = 5;
        // Reconnect when the server sends nothing for 10 seconds.
        private const int READ_TIMEOUT = 10;

        private static UptimeClientHandler handler = new UptimeClientHandler();
        private static Bootstrap bs = new Bootstrap();

        static void Main(string[] args)
        {
            EventLoopGroup group = new EventLoopGroup();
            bs.Group(group)
                .Channel()
                .RemoteAddress(HOST, PORT)
                 .Handler(new ActionChannelInitializer(channel =>
                 {
                     //IdleStateHandler心跳检测处理器，添加自定义处理Handler类实现userEventTriggered()方法作为超时事件的逻辑处理
                     //IdleStateHandler心跳检测每十秒进行一次读检测，如果十秒内ChannelRead()方法未被调用则触发一次userEventTrigger()方法.
                     IChannelPipeline pipeline = channel.Pipeline;
                     pipeline.AddLast(new IdleStateHandler(READ_TIMEOUT, 0, 0), handler);//第一个参数为读，第二个为写，第三个为读写全部

                 }));
        }
    }

Uptime.Client.UptimeClientHandler:

 public class UptimeClientHandler : SimpleChannelInboundHandler