Rpc优化(一) 优雅的退出

已经大概完成了一个Rpc项目

代理 注册中心 序列化 通信都完成了

开始优化

public class NettyRpcServer {
private  int port;
public void start(Object serviceImpl,int port1){
    this.port=port1;
    EventLoopGroup boss=new NioEventLoopGroup();
    EventLoopGroup worker =new NioEventLoopGroup();
        ServerBootstrap b= new ServerBootstrap();
        b.group(boss,worker)
                .channel(NioServerSocketChannel.class)
                // TCP默认开启了 Nagle 算法，该算法的作用是尽可能的发送大数据快，减少网络传输。TCP_NODELAY 参数的作用就是控制是否启用 Nagle 算法。
                .childOption(ChannelOption.TCP_NODELAY, true)
                // 是否开启 TCP 底层心跳机制
                .childOption(ChannelOption.SO_KEEPALIVE, true)
                //表示系统用于临时存放已完成三次握手的请求的队列的最大长度,如果连接建立频繁，服务器处理创建新连接较慢，可以适当调大这个参数
                .option(ChannelOption.SO_BACKLOG, 128)
                .handler(new LoggingHandler(LogLevel.INFO))
                .childHandler(new ChannelInitializer<SocketChannel>() {
                    @Override
                    protected void initChannel(SocketChannel socketChannel) throws Exception {
                        ChannelPipeline channelPipeline=socketChannel.pipeline();
                        channelPipeline.addLast(new IdleStateHandler(30,0,0, TimeUnit.SECONDS));
                        channelPipeline.addLast(new RpcEncoder());
                        channelPipeline.addLast(new RpcDecoder());
                        channelPipeline.addLast(new RpcServerHandler(serviceImpl));
                    }
                });
        try {
            ChannelFuture channelFuture=b.bind(port).sync();
            channelFuture.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
        boss.shutdownGracefully();
        worker.shutdownGracefully();
    }
}
}

这里的 channelFuture.channel().closeFuture().sync();是同步阻塞的方式来退出，不符合Netty理念

更改为 `

       channelFuture.channel().closeFuture().addListener(new  channelFutureListener() {
               @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    log.info("准备关闭"+channelFuture.channel().toString());
                    boss.shutdownGracefully();
                    worker.shutdownGracefully();
                }
            });
            
            `

****异步地关闭