Netty异步模型Future-Listener机制

其他模块与下列连接一致
https://blog.csdn.net/weixin_44371237/article/details/122391777?spm=1001.2014.3001.5501

public class Server {
    public static void main(String[] args) throws InterruptedException {
        //创建两个事件循环组，bossGroup只处理连接请求，workGroup处理客户端业务处理，交给bossGroup
        //两个都是无线循环
        //默认CPU核*2
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workGroup = new NioEventLoopGroup();

        try {
            //创建服务端启动对象，配置参数
            ServerBootstrap bootstrap = new ServerBootstrap();

            //用链式编程进行设置
            bootstrap.group(bossGroup, workGroup)//设置两个线程组
                    .channel(NioServerSocketChannel.class)//使用NioSocketChannel作为服务器通道实现
                    .option(ChannelOption.SO_BACKLOG, 128)//设置线程队列个数
                    .childOption(ChannelOption.SO_KEEPALIVE, true)//设置保持活动连接状态
                    .childHandler(new ChannelInitializer() {//创建通道测试对象（匿名对象）
                        //给pipeline设置处理器
                        @Override
                        protected void initChannel(SocketChannel channel) throws Exception {
                            System.out.println(channel.hashCode());
                            channel.pipeline().addLast(new ServerHandler());//向管道最后添加处理器
                        }
                    });//给workGroup的EventLoop对应的管道设置处理器

            System.out.println(LocalDateTime.now() + "服务器准备好了");

            //启动服务器，绑定端口，生成ChannelFuture对象
            ChannelFuture future = bootstrap.bind(888).sync();

            //给ChannelFuture注册监听器，监控关心的事件
            future.addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture channelFuture) throws Exception {
                    if(future.isSuccess()){
                        System.out.println("监听端口成功");
                    }else {
                        System.out.println("监听端口失败");
                    }
                }
            });

            //对关闭通道进行监听(非阻塞监听，异步模型)
            future.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workGroup.shutdownGracefully();
        }
    }
}