Netty客戶端斷線重連

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

與安卓交互需要用到 特此記錄

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;

    //重連調用的函數
    public Channel connect(String host, int port) {
        doConnect(host, port);
        return this.channel;
    }


    public void doConnect(String host, int port) {

        try {
            //設置一個多線程循環器
            workerGroup = new NioEventLoopGroup();
            //啓動附註類
            Bootstrap bootstrap = new Bootstrap();
            bootstrap.group(workerGroup);
            //指定所使用的NIO傳輸channel
            bootstrap.channel(NioSocketChannel.class);
            //指定客戶端初始化處理
            bootstrap.handler(new ClientIniterHandler());

            //連接服務
            //   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: " ,"服務端鏈接不上，開始重連操作.." );
                    nettyClient.connect(NettyClient.HOST, NettyClient.PORT);

                }
            }, 1L, TimeUnit.SECONDS);
        } else {
            Log.e("ConnectionListener: " ,"服務端鏈接成功..." );
        }
    }
}

 

  //有異常 關閉
    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        super.exceptionCaught(ctx, cause);
        ctx.close();
    }

    //服務端突然掛了
    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {


        Log.e("channelInactive: " ,"掉線了..." );
        //使用過程中斷線重連
        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);
    }