Netty客户端断线重连

参考:https://www.jianshu.com/p/c78b37a2ca47 

与安卓交互需要用到 特此记录

public class NettyClient  {
    public final static String HOST = "192.168.31.178";
    public final static int PORT = 9527;


    private static EventLoopGroup workerGroup = null;

    private Channel channel;

    //重连调用的函数
    public Channel connect(String host, int port) {
        doConnect(host, port);
        return this.channel;
    }


    public void doConnect(String host, int port) {

        try {
            //设置一个多线程循环器
            workerGroup = new NioEventLoopGroup();
            //启动附注类
            Bootstrap bootstrap = new Bootstrap();
            bootstrap.group(workerGroup);
            //指定所使用的NIO传输channel
            bootstrap.channel(NioSocketChannel.class);
            //指定客户端初始化处理
            bootstrap.handler(new ClientIniterHandler());

            //连接服务
            //   Channel channel = bootstrap.connect(host, port).sync().channel();

            ChannelFuture f = bootstrap.connect(host, port);
            f.addListener(new ConnectionListener());
            channel = f.channel();

        } catch (Exception e) {
            e.printStackTrace();
            System.exit(1);
        }
    }
public class ConnectionListener implements ChannelFutureListener {

    private NettyClient nettyClient = new NettyClient();

    @Override
    public void operationComplete(ChannelFuture channelFuture) throws Exception {
        if (!channelFuture.isSuccess()) {
            final EventLoop loop = channelFuture.channel().eventLoop();
            loop.schedule(new Runnable() {
                @Override
                public void run() {
                    Log.e("ConnectionListener: " ,"服务端链接不上,开始重连操作.." );
                    nettyClient.connect(NettyClient.HOST, NettyClient.PORT);

                }
            }, 1L, TimeUnit.SECONDS);
        } else {
            Log.e("ConnectionListener: " ,"服务端链接成功..." );
        }
    }
}

 

  //有异常 关闭
    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        super.exceptionCaught(ctx, cause);
        ctx.close();
    }

    //服务端突然挂了
    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {


        Log.e("channelInactive: " ,"掉线了..." );
        //使用过程中断线重连
        final EventLoop eventLoop = ctx.channel().eventLoop();
        eventLoop.schedule(new Runnable() {
            @Override
            public void run() {
                nettyClient.connect(NettyClient.HOST, NettyClient.PORT);
            }
        }, 1L, TimeUnit.SECONDS);
        super.channelInactive(ctx);
    }

 

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