Netty在rocketmq中的实现二NettyRemotingClient

昨天我们学习了 NettyRemotingServer的实现，今天来学习client的实现

 public void start() {
        this.defaultEventExecutorGroup = new DefaultEventExecutorGroup(//
                nettyClientConfig.getClientWorkerThreads(), //
                new ThreadFactory() {

                    private AtomicInteger threadIndex = new AtomicInteger(0);


                    @Override
                    public Thread newThread(Runnable r) {
                        return new Thread(r, "NettyClientWorkerThread_" + this.threadIndex.incrementAndGet());
                    }
                });

        Bootstrap handler = this.bootstrap.group(this.eventLoopGroupWorker).channel(NioSocketChannel.class)//
                //
                .option(ChannelOption.TCP_NODELAY, true)
                //
                .option(ChannelOption.SO_KEEPALIVE, false)
                //
                .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, nettyClientConfig.getConnectTimeoutMillis())
                //
                .option(ChannelOption.SO_SNDBUF, nettyClientConfig.getClientSocketSndBufSize())
                //
                .option(ChannelOption.SO_RCVBUF, nettyClientConfig.getClientSocketRcvBufSize())
                //
                .handler(new ChannelInitializer() {
                    @Override
                    public void initChannel(SocketChannel ch) throws Exception {
                        ch.pipeline().addLast(//
                                defaultEventExecutorGroup, //
                                new NettyEncoder(), //
                                new NettyDecoder(), //
                                new IdleStateHandler(0, 0, nettyClientConfig.getClientChannelMaxIdleTimeSeconds()), //
                                new NettyConnetManageHandler(), //
                                new NettyClientHandler());
                    }
                });

        this.timer.scheduleAtFixedRate(new TimerTask() {

            @Override
            public void run() {
                try {
                    NettyRemotingClient.this.scanResponseTable();
                } catch (Exception e) {
                    log.error("scanResponseTable exception", e);
                }
            }
        }, 1000 * 3, 1000);

        if (this.channelEventListener != null) {
            this.nettyEventExecuter.start();
        }