外网图片素材网站,沧州南皮网站建设公司,网站开发实训内容,旅游网站手机模板断连重试有以下两点考虑#xff1a;
1、连接异常#xff0c;比如网络抖动导致连接失败#xff1b;
2、连接过程中断开连接重试#xff1b;
主要用到两个工具类#xff1a;
ChannelFutureListener监听ChannelFuture..isSuccess()#xff1b;
ChannelInboundHandlerAd…断连重试有以下两点考虑
1、连接异常比如网络抖动导致连接失败
2、连接过程中断开连接重试
主要用到两个工具类
ChannelFutureListener监听ChannelFuture..isSuccess()
ChannelInboundHandlerAdapter重写channelInactive当连接变为不活跃则回调该方法。
完整代码如下
Component
public class WebSocketClient {private Channel channel;private Bootstrap bootstrap;private URI uri;private MessageHandler messageHandler;private WebSocketClientHandler handler;private volatile AtomicInteger atomicCount new AtomicInteger(0);public WebSocketClient initClient(String host, MessageHandler messageHandler) throws Exception {this.messageHandler messageHandler;if (StringUtils.isEmpty(host)) {throw new RuntimeException(未配置host.);}uri new URI(host);String scheme uri.getScheme() null? WssSchemeEnum.WS.getValue() : uri.getScheme();//判断是否ssl连接如果是则设置为可信final boolean ssl WssSchemeEnum.WSS.getValue().equalsIgnoreCase(scheme);final SslContext sslCtx;if (ssl) {sslCtx SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE).build();} else {sslCtx null;}EventLoopGroup group new NioEventLoopGroup();try {bootstrap new Bootstrap();bootstrap.group(group).channel(NioSocketChannel.class).handler(new ChannelInitializerSocketChannel() {Overrideprotected void initChannel(SocketChannel ch) {ChannelPipeline p ch.pipeline();p.addFirst(new ChannelInboundHandlerAdapter() {Overridepublic void channelInactive(ChannelHandlerContext ctx) throws Exception {log.error(【{}】检测到wss断连, 第 {} 次发起重连., exchange, atomicCount.incrementAndGet());super.channelInactive(ctx);ctx.channel().eventLoop().schedule(WebSocketClient.this::doConnect, 3000, TimeUnit.MILLISECONDS);}});if (sslCtx ! null) {p.addLast(sslCtx.newHandler(ch.alloc(), uri.getHost(), getUriPort(uri)));}p.addLast(new HttpClientCodec());p.addLast(new HttpObjectAggregator(8192));p.addLast(WebSocketClientCompressionHandler.INSTANCE);handler new WebSocketClientHandler(WebSocketClientHandshakerFactory.newHandshaker(uri, WebSocketVersion.V13, null, true, new DefaultHttpHeaders()), exchange, messageHandler);p.addLast(handler);}});} catch (Exception e) {log.error(wss创建client异常. e:, e);if (bootstrap ! null) {bootstrap.config().group().shutdownGracefully();}throw new RuntimeException(初始化wss连接异常. e: e);}doConnect();return this;}public void doConnect() {try {ChannelFuture future bootstrap.connect(uri.getHost(), getUriPort(uri)).sync();handler.handshakeFuture().sync();future.addListener((ChannelFutureListener) cf - {if (future.isSuccess()) {channel future.channel();WssManger.addChannel(exchange, channel);log.info(连接成功.);messageHandler.connectSuccessAction(future.channel());atomicCount.set(0);} else {log.error(监听断连, wss第 {} 次发起重连. , atomicCount.incrementAndGet());future.channel().eventLoop().schedule(WebSocketClient.this::doConnect, 3000, TimeUnit.MILLISECONDS);}});}catch (Exception e) {log.error(连接异常. e: e);if (bootstrap ! null) {log.info(wss连接异常第 {} 次发起重连., atomicCount.incrementAndGet());bootstrap.config().group().schedule(WebSocketClient.this::doConnect, 3000, TimeUnit.MILLISECONDS);}}}/*** 根据URI获取对应的port** param uri uri* return port*/private int getUriPort(URI uri) {String scheme uri.getScheme() null? WssSchemeEnum.WS.getValue() : uri.getScheme();if (!WssSchemeEnum.allScheme().contains(scheme)) {throw new RuntimeException(Only WS(S) is supported.);}if (uri.getPort() -1) {if (WssSchemeEnum.WS.getValue().equalsIgnoreCase(scheme)) {return WssSchemeEnum.WS.getPort();} else if (WssSchemeEnum.WSS.getValue().equalsIgnoreCase(scheme)) {return WssSchemeEnum.WSS.getPort();} else {return -1;}} else {return uri.getPort();}}
}
