Netty ChannelFuture 监听三种方法

以下是伪代码

方法一

前后代码省略
//绑定服务器，该实例将提供有关IO操作的结果或状态的信息
ChannelFuture channelFuture = bootstrap.bind();
this.serverChannel = channelFuture.channel();

//给cf 注册监听器，监控我们关心的事件
channelFuture.addListener(new ChannelFutureListener() {
    @Override
    public void operationComplete(ChannelFuture future) throws Exception {
        if (future.isSuccess()) {
            logger.info("在" + future.channel().localAddress() + "上开启监听 成功");
            Instance nacos = nacosUtil.registerInstance();
        } else {
            logger.info("在" + future.channel().localAddress() + "上开启监听 失败");
        }
    }
});

方法二

ChannelFuture f = bootstrap.connect();
f.addListener(connectedListener);


private GenericFutureListener<ChannelFuture> connectedListener = (ChannelFuture f) ->
{
    final EventLoop eventLoop = f.channel().eventLoop();
    if (!f.isSuccess()) {
        logger.info("连接失败!在10s之后准备尝试重连! doConnect => {}:{}", host, port);
        eventLoop.schedule(() -> this.doConnect(), 10, TimeUnit.SECONDS); 
    } else {
        connectFlag = true;
        channel = f.channel();
        channel.closeFuture().addListener(closeListener);

        logger.info("连接成功: localAddress => {} remoteAddress => {}", f.channel().localAddress(), f.channel().remoteAddress()); 
    }
}; 

方法三

//绑定服务器，该实例将提供有关IO操作的结果或状态的信息
ChannelFuture channelFuture = bootstrap.connect(nettyHost, nettyPort);//.sync()去掉，不然就走不到下一行 ListennerClientReconnHeart 加不进去
channelFuture.addListener(applicationContext.getBean(NettyClientReconnHeart.class));


@Component
public class NettyClientReconnHeart implements ChannelFutureListener {

    private final Logger logger = LoggerFactory.getLogger(LoggerConfig.NETTY_LOGGER);

    @Autowired
    private NettyClient nettyClient;

    @Override
    public void operationComplete(ChannelFuture channelFuture) throws Exception {
        if (!channelFuture.isSuccess()) {
            EventLoop loop = channelFuture.channel().eventLoop();
            logger.warn("客户端已启动，与服务端建立连接失败,10s之后尝试重连!");
            loop.schedule(() -> nettyClient.doConnect(), 10, TimeUnit.SECONDS);
        } else {
            logger.info("服务器连接成功");
        }
    }
}