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怎么设计一个高性能网关

发表于：2025-11-17 作者：千家信息网编辑

千家信息网最后更新 2025年11月17日，这篇文章主要介绍"怎么设计一个高性能网关"，在日常操作中，相信很多人在怎么设计一个高性能网关问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"怎么设计一个高性能网关"的疑惑

千家信息网最后更新 2025年11月17日怎么设计一个高性能网关

这篇文章主要介绍"怎么设计一个高性能网关"，在日常操作中，相信很多人在怎么设计一个高性能网关问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"怎么设计一个高性能网关"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

一、前言

最近在github上看了soul网关的设计，突然就来了兴趣准备自己从零开始写一个高性能的网关。

经过两周时间的开发，我的网关ship-gate核心功能基本都已完成，最大的缺陷就是前端功底太差没有管理后台?。

二、设计

2.1 技术选型

网关是所有请求的入口，所以要求有很高的吞吐量，为了实现这点可以使用请求异步化来解决。

目前一般有以下两种方案：

Tomcat/Jetty+NIO+Servlet3

Servlet3已经支持异步，这种方案使用比较多，京东，有赞和Zuul，都用的是这种方案。

Netty+NIO

Netty为高并发而生，目前唯品会的网关使用这个策略，在唯品会的技术文章中在相同的情况下Netty是每秒30w+的吞吐量，Tomcat是13w+,可以看出是有一定的差距的，但是Netty需要自己处理HTTP协议，这一块比较麻烦。

后面发现Soul网关是基于Spring WebFlux（底层Netty）的，不用太关心HTTP协议的处理，于是决定也用Spring WebFlux。

网关的第二个特点是具备可扩展性，比如Netflix Zuul有preFilters，postFilters等在不同的阶段方便处理不同的业务，基于责任链模式将请求进行链式处理即可实现。

在微服务架构下，服务都会进行多实例部署来保证高可用，请求到达网关时，网关需要根据URL找到所有可用的实例，这时就需要服务注册和发现功能，即注册中心。

现在流行的注册中心有Apache的Zookeeper和阿里的Nacos两种（consul有点小众），因为之前写RPC框架时已经用过了Zookeeper，所以这次就选择了Nacos。

2.2 需求清单

首先要明确目标，即开发一个具备哪些特性的网关，总结下后如下：

自定义路由规则

可基于version的路由规则设置，路由对象包括DEFAUL,HEADER和QUERY三种，匹配方式包括=、regex、like三种。

跨语言

HTTP协议天生跨语言

高性能

Netty本身就是一款高性能的通信框架，同时server将一些路由规则等数据缓存到JVM内存避免请求admin服务。

高可用

支持集群模式防止单节点故障，无状态。

灰度发布

灰度发布（又名金丝雀发布）是指在黑与白之间，能够平滑过渡的一种发布方式。在其上可以进行A/B testing，即让一部分用户继续用产品特性A，一部分用户开始用产品特性B，如果用户对B没有什么反对意见，那么逐步扩大范围，把所有用户都迁移到B上面来。通过特性一可以实现。

接口鉴权

基于责任链模式，用户开发自己的鉴权插件即可。

负载均衡

支持多种负载均衡算法，如随机，轮询，加权轮询等。利用SPI机制可以根据配置进行动态加载。

2.3 架构设计

在参考了一些优秀的网关Zuul,Spring Cloud Gateway,Soul后，将项目划分为以下几个模块。

名称	描述
ship-admin	后台管理界面，配置路由规则等
ship-server	网关服务端，核心功能模块
ship-client-spring-boot-starter	网关客户端，自动注册服务信息到注册中心
ship-common	一些公共的代码，如pojo，常量等。

它们之间的关系如图：

注意：这张图与实际实现有点出入，Nacos push到本地缓存的那个环节没有实现，目前只有ship-sever定时轮询pull的过程。ship-admin从Nacos获取注册服务信息的过程，也改成了ServiceA启动时主动发生HTTP请求通知ship-admin。

2.4 表结构设计

三、编码

3.1 ship-client-spring-boot-starter

首先创建一个spring-boot-starter命名为ship-client-spring-boot-starter，不知道如何自定义starter的可以看我以前写的《开发自己的starter》。

更多 Spring Boot 教程推荐看这个：

https://github.com/javastacks/spring-boot-best-practice

其核心类 AutoRegisterListener 就是在项目启动时做了两件事：

1.将服务信息注册到Nacos注册中心

2.通知ship-admin服务上线了并注册下线hook。

代码如下：

/**   * Created by 2YSP on 2020/12/21   */  public class AutoRegisterListener implements ApplicationListener {      private final static Logger LOGGER = LoggerFactory.getLogger(AutoRegisterListener.class);      private volatile AtomicBoolean registered = new AtomicBoolean(false);      private final ClientConfigProperties properties;      @NacosInjected      private NamingService namingService;      @Autowired      private RequestMappingHandlerMapping handlerMapping;      private final ExecutorService pool;      /**       * url list to ignore       */      private static List ignoreUrlList = new LinkedList<>();     static {          ignoreUrlList.add("/error");      }       public AutoRegisterListener(ClientConfigProperties properties) {          if (!check(properties)) {              LOGGER.error("client config port,contextPath,appName adminUrl and version can't be empty!");              throw new ShipException("client config port,contextPath,appName adminUrl and version can't be empty!");          }          this.properties = properties;          pool = new ThreadPoolExecutor(1, 4, 0, TimeUnit.SECONDS, new LinkedBlockingQueue<>());      }      /**       * check the ClientConfigProperties       *       * @param properties       * @return       */      private boolean check(ClientConfigProperties properties) {          if (properties.getPort() == null || properties.getContextPath() == null                  || properties.getVersion() == null || properties.getAppName() == null                  || properties.getAdminUrl() == null) {              return false;         }          return true;      }       @Override      public void onApplicationEvent(ContextRefreshedEvent event) {          if (!registered.compareAndSet(false, true)) {              return;         }          doRegister();          registerShutDownHook();      }       /**       * send unregister request to admin when jvm shutdown       */      private void registerShutDownHook() {          final String url = "http://" + properties.getAdminUrl() + AdminConstants.UNREGISTER_PATH;          final UnregisterAppDTO unregisterAppDTO = new UnregisterAppDTO();          unregisterAppDTO.setAppName(properties.getAppName());          unregisterAppDTO.setVersion(properties.getVersion());          unregisterAppDTO.setIp(IpUtil.getLocalIpAddress());          unregisterAppDTO.setPort(properties.getPort());          Runtime.getRuntime().addShutdownHook(new Thread(() -> {              OkhttpTool.doPost(url, unregisterAppDTO);              LOGGER.info("[{}:{}] unregister from ship-admin success!", unregisterAppDTO.getAppName(), unregisterAppDTO.getVersion());          }));      }      /**       * register all interface info to register center       */      private void doRegister() {          Instance instance = new Instance();          instance.setIp(IpUtil.getLocalIpAddress());          instance.setPort(properties.getPort());          instance.setEphemeral(true);          Map metadataMap = new HashMap<>();          metadataMap.put("version", properties.getVersion());          metadataMap.put("appName", properties.getAppName());          instance.setMetadata(metadataMap);          try {              namingService.registerInstance(properties.getAppName(), NacosConstants.APP_GROUP_NAME, instance);          } catch (NacosException e) {              LOGGER.error("register to nacos fail", e);              throw new ShipException(e.getErrCode(), e.getErrMsg());          }          LOGGER.info("register interface info to nacos success!");          // send register request to ship-admin          String url = "http://" + properties.getAdminUrl() + AdminConstants.REGISTER_PATH;          RegisterAppDTO registerAppDTO = buildRegisterAppDTO(instance);          OkhttpTool.doPost(url, registerAppDTO);          LOGGER.info("register to ship-admin success!");      }      private RegisterAppDTO buildRegisterAppDTO(Instance instance) {          RegisterAppDTO registerAppDTO = new RegisterAppDTO();          registerAppDTO.setAppName(properties.getAppName());          registerAppDTO.setContextPath(properties.getContextPath());          registerAppDTO.setIp(instance.getIp());          registerAppDTO.setPort(instance.getPort());          registerAppDTO.setVersion(properties.getVersion());          return registerAppDTO;      }  }

3.2 ship-server

ship-sever项目主要包括了两个部分内容：

1.请求动态路由的主流程

2.本地缓存数据和ship-admin及nacos同步，这部分在后面3.3再讲。

ship-server实现动态路由的原理是利用WebFilter拦截请求，然后将请求教给plugin chain去链式处理。

PluginFilter根据URL解析出appName，然后将启用的plugin组装成plugin chain。

最新 Java 核心技术教程，都在这了！

public class PluginFilter implements WebFilter {       private ServerConfigProperties properties;       public PluginFilter(ServerConfigProperties properties) {          this.properties = properties;      }       @Override      public Mono filter(ServerWebExchange exchange, WebFilterChain chain) {          String appName = parseAppName(exchange);          if (CollectionUtils.isEmpty(ServiceCache.getAllInstances(appName))) {              throw new ShipException(ShipExceptionEnum.SERVICE_NOT_FIND);          }         PluginChain pluginChain = new PluginChain(properties, appName);          pluginChain.addPlugin(new DynamicRoutePlugin(properties));          pluginChain.addPlugin(new AuthPlugin(properties));          return pluginChain.execute(exchange, pluginChain);      }      private String parseAppName(ServerWebExchange exchange) {          RequestPath path = exchange.getRequest().getPath();         String appName = path.value().split("/")[1];          return appName;      }  }

PluginChain继承了AbstractShipPlugin并持有所有要执行的插件。

/**   * @Author: Ship   * @Description:   * @Date: Created in 2020/12/25   */  public class PluginChain extends AbstractShipPlugin {      /**       * the pos point to current plugin       */      private int pos;      /**       * the plugins of chain       */      private List plugins;      private final String appName;      public PluginChain(ServerConfigProperties properties, String appName) {          super(properties);          this.appName = appName;      }      /**       * add enabled plugin to chain       *       * @param shipPlugin       */      public void addPlugin(ShipPlugin shipPlugin) {          if (plugins == null) {              plugins = new ArrayList<>();          }          if (!PluginCache.isEnabled(appName, shipPlugin.name())) {              return;          }          plugins.add(shipPlugin);          // order by the plugin's order         plugins.sort(Comparator.comparing(ShipPlugin::order));      }     @Override      public Integer order() {         return null;      }      @Override      public String name() {          return null;      }      @Override      public Mono execute(ServerWebExchange exchange, PluginChain pluginChain) {          if (pos == plugins.size()) {              return exchange.getResponse().setComplete();          }          return pluginChain.plugins.get(pos++).execute(exchange, pluginChain);      }      public String getAppName() {          return appName;      }  }

AbstractShipPlugin实现了ShipPlugin接口，并持有ServerConfigProperties配置对象。

public abstract class AbstractShipPlugin implements ShipPlugin {       protected ServerConfigProperties properties;       public AbstractShipPlugin(ServerConfigProperties properties) {          this.properties = properties;      }  }

ShipPlugin接口定义了所有插件必须实现的三个方法order(),name()和execute()。

public interface ShipPlugin {      /**       * lower values have higher priority       *       * @return      */      Integer order();      /**       * return current plugin name       *       * @return       */     String name();      Mono execute(ServerWebExchange exchange,PluginChain pluginChain);  }

DynamicRoutePlugin继承了抽象类AbstractShipPlugin，包含了动态路由的主要业务逻辑。

/**   * @Author: Ship   * @Description:   * @Date: Created in 2020/12/25   */  public class DynamicRoutePlugin extends AbstractShipPlugin {      private final static Logger LOGGER = LoggerFactory.getLogger(DynamicRoutePlugin.class);      private static WebClient webClient;      private static final Gson gson = new GsonBuilder().create();      static {          HttpClient httpClient = HttpClient.create()                  .tcpConfiguration(client ->                          client.doOnConnected(conn ->                                  conn.addHandlerLast(new ReadTimeoutHandler(3))                                          .addHandlerLast(new WriteTimeoutHandler(3)))                                  .option(ChannelOption.TCP_NODELAY, true)                  );          webClient = WebClient.builder().clientConnector(new ReactorClientHttpConnector(httpClient))                  .build();      }      public DynamicRoutePlugin(ServerConfigProperties properties) {          super(properties);      }      @Override      public Integer order() {          return ShipPluginEnum.DYNAMIC_ROUTE.getOrder();      }      @Override      public String name() {          return ShipPluginEnum.DYNAMIC_ROUTE.getName();      }      @Override      public Mono execute(ServerWebExchange exchange, PluginChain pluginChain) {          String appName = pluginChain.getAppName();          ServiceInstance serviceInstance = chooseInstance(appName, exchange.getRequest());  //        LOGGER.info("selected instance is [{}]", gson.toJson(serviceInstance));          // request service          String url = buildUrl(exchange, serviceInstance);          return forward(exchange, url);      }      /**       * forward request to backend service       *       * @param exchange       * @param url       * @return       */      private Mono forward(ServerWebExchange exchange, String url) {          ServerHttpRequest request = exchange.getRequest();          ServerHttpResponse response = exchange.getResponse();          HttpMethod method = request.getMethod();          WebClient.RequestBodySpec requestBodySpec = webClient.method(method).uri(url).headers((headers) -> {              headers.addAll(request.getHeaders());          });          WebClient.RequestHeadersSpec reqHeadersSpec;          if (requireHttpBody(method)) {              reqHeadersSpec = requestBodySpec.body(BodyInserters.fromDataBuffers(request.getBody()));          } else {              reqHeadersSpec = requestBodySpec;          }          // nio->callback->nio          return reqHeadersSpec.exchange().timeout(Duration.ofMillis(properties.getTimeOutMillis()))                  .onErrorResume(ex -> {                     return Mono.defer(() -> {                          String errorResultJson = "";                          if (ex instanceof TimeoutException) {                              errorResultJson = "{\"code\":5001,\"message\":\"network timeout\"}";                          } else {                              errorResultJson = "{\"code\":5000,\"message\":\"system error\"}";                          }                         return ShipResponseUtil.doResponse(exchange, errorResultJson);                      }).then(Mono.empty());                  }).flatMap(backendResponse -> {                      response.setStatusCode(backendResponse.statusCode());                      response.getHeaders().putAll(backendResponse.headers().asHttpHeaders());                      return response.writeWith(backendResponse.bodyToFlux(DataBuffer.class));                  });      }      /**       * weather the http method need http body       *       * @param method       * @return       */      private boolean requireHttpBody(HttpMethod method) {          if (method.equals(HttpMethod.POST) || method.equals(HttpMethod.PUT) || method.equals(HttpMethod.PATCH)) {              return true;          }          return false;      }      private String buildUrl(ServerWebExchange exchange, ServiceInstance serviceInstance) {          ServerHttpRequest request = exchange.getRequest();          String query = request.getURI().getQuery();          String path = request.getPath().value().replaceFirst("/" + serviceInstance.getAppName(), "");          String url = "http://" + serviceInstance.getIp() + ":" + serviceInstance.getPort() + path;          if (!StringUtils.isEmpty(query)) {              urlurl = url + "?" + query;          }          return url;      }     /**       * choose an ServiceInstance according to route rule config and load balancing algorithm       *       * @param appName       * @param request       * @return       */      private ServiceInstance chooseInstance(String appName, ServerHttpRequest request) {          List serviceInstances = ServiceCache.getAllInstances(appName);          if (CollectionUtils.isEmpty(serviceInstances)) {              LOGGER.error("service instance of {} not find", appName);              throw new ShipException(ShipExceptionEnum.SERVICE_NOT_FIND);          }          String version = matchAppVersion(appName, request);          if (StringUtils.isEmpty(version)) {              throw new ShipException("match app version error");          }          // filter serviceInstances by version          List instances = serviceInstances.stream().filter(i -> i.getVersion().equals(version)).collect(Collectors.toList());          //Select an instance based on the load balancing algorithm          LoadBalance loadBalance = LoadBalanceFactory.getInstance(properties.getLoadBalance(), appName, version);          ServiceInstance serviceInstance = loadBalance.chooseOne(instances);          return serviceInstance;      }      private String matchAppVersion(String appName, ServerHttpRequest request) {          List rules = RouteRuleCache.getRules(appName);          rules.sort(Comparator.comparing(AppRuleDTO::getPriority).reversed());          for (AppRuleDTO rule : rules) {              if (match(rule, request)) {                  return rule.getVersion();              }          }          return null;      }      private boolean match(AppRuleDTO rule, ServerHttpRequest request) {          String matchObject = rule.getMatchObject();          String matchKey = rule.getMatchKey();          String matchRule = rule.getMatchRule();          Byte matchMethod = rule.getMatchMethod();         if (MatchObjectEnum.DEFAULT.getCode().equals(matchObject)) {              return true;          } else if (MatchObjectEnum.QUERY.getCode().equals(matchObject)) {              String param = request.getQueryParams().getFirst(matchKey);              if (!StringUtils.isEmpty(param)) {                  return StringTools.match(param, matchMethod, matchRule);              }          } else if (MatchObjectEnum.HEADER.getCode().equals(matchObject)) {              HttpHeaders headers = request.getHeaders();              String headerValue = headers.getFirst(matchKey);              if (!StringUtils.isEmpty(headerValue)) {                  return StringTools.match(headerValue, matchMethod, matchRule);              }          }          return false;      }  }

3.3 数据同步

app数据同步

后台服务（如订单服务）启动时，只将服务名，版本，ip地址和端口号注册到了Nacos，并没有实例的权重和启用的插件信息怎么办？

一般在线的实例权重和插件列表都是在管理界面配置，然后动态生效的，所以需要ship-admin定时更新实例的权重和插件信息到注册中心。

对应代码ship-admin的NacosSyncListener

/**   * @Author: Ship   * @Description:   * @Date: Created in 2020/12/30   */  @Configuration  public class NacosSyncListener implements ApplicationListener {       private static final Logger LOGGER = LoggerFactory.getLogger(NacosSyncListener.class);       private static ScheduledThreadPoolExecutor scheduledPool = new ScheduledThreadPoolExecutor(1,              new ShipThreadFactory("nacos-sync", true).create());       @NacosInjected      private NamingService namingService;       @Value("${nacos.discovery.server-addr}")      private String baseUrl;       @Resource      private AppService appService;       @Override      public void onApplicationEvent(ContextRefreshedEvent event) {          if (event.getApplicationContext().getParent() != null) {              return;          }          String url = "http://" + baseUrl + NacosConstants.INSTANCE_UPDATE_PATH;          scheduledPool.scheduleWithFixedDelay(new NacosSyncTask(namingService, url, appService), 0, 30L, TimeUnit.SECONDS);      }       class NacosSyncTask implements Runnable {           private NamingService namingService;           private String url;           private AppService appService;           private Gson gson = new GsonBuilder().create();           public NacosSyncTask(NamingService namingService, String url, AppService appService) {              this.namingService = namingService;              this.url = url;              this.appService = appService;          }          /**           * Regular update weight,enabled plugins to nacos instance           */          @Override          public void run() {              try {                  // get all app names                  ListView services = namingService.getServicesOfServer(1, Integer.MAX_VALUE, NacosConstants.APP_GROUP_NAME);                  if (CollectionUtils.isEmpty(services.getData())) {                      return;                  }                  List appNames = services.getData();                  List appInfos = appService.getAppInfos(appNames);                  for (AppInfoDTO appInfo : appInfos) {                      if (CollectionUtils.isEmpty(appInfo.getInstances())) {                          continue;                      }                      for (ServiceInstance instance : appInfo.getInstances()) {                          Map queryMap = buildQueryMap(appInfo, instance);                          String resp = OkhttpTool.doPut(url, queryMap, "");                          LOGGER.debug("response :{}", resp);                      }                  }              } catch (Exception e) {                  LOGGER.error("nacos sync task error", e);              }          }          private Map buildQueryMap(AppInfoDTO appInfo, ServiceInstance instance) {              Map map = new HashMap<>();              map.put("serviceName", appInfo.getAppName());              map.put("groupName", NacosConstants.APP_GROUP_NAME);              map.put("ip", instance.getIp());              map.put("port", instance.getPort());              map.put("weight", instance.getWeight().doubleValue());              NacosMetadata metadata = new NacosMetadata();              metadata.setAppName(appInfo.getAppName());              metadata.setVersion(instance.getVersion());              metadata.setPlugins(String.join(",", appInfo.getEnabledPlugins()));              map.put("metadata", StringTools.urlEncode(gson.toJson(metadata)));              map.put("ephemeral", true);              return map;          }      }  }

ship-server再定时从Nacos拉取app数据更新到本地Map缓存。

/**   * @Author: Ship  * @Description: sync data to local cache   * @Date: Created in 2020/12/25   */  @Configuration  public class DataSyncTaskListener implements ApplicationListener {      private static ScheduledThreadPoolExecutor scheduledPool = new ScheduledThreadPoolExecutor(1,              new ShipThreadFactory("service-sync", true).create());      @NacosInjected      private NamingService namingService;      @Autowired      private ServerConfigProperties properties;      @Override      public void onApplicationEvent(ContextRefreshedEvent event) {          if (event.getApplicationContext().getParent() != null) {              return;          }          scheduledPool.scheduleWithFixedDelay(new DataSyncTask(namingService)                  , 0L, properties.getCacheRefreshInterval(), TimeUnit.SECONDS);          WebsocketSyncCacheServer websocketSyncCacheServer = new WebsocketSyncCacheServer(properties.getWebSocketPort());          websocketSyncCacheServer.start();      }      class DataSyncTask implements Runnable {          private NamingService namingService;          public DataSyncTask(NamingService namingService) {              this.namingService = namingService;          }          @Override          public void run() {              try {                  // get all app names                  ListView services = namingService.getServicesOfServer(1, Integer.MAX_VALUE, NacosConstants.APP_GROUP_NAME);                  if (CollectionUtils.isEmpty(services.getData())) {                      return;                  }                  List appNames = services.getData();                  // get all instances                  for (String appName : appNames) {                      List instanceList = namingService.getAllInstances(appName, NacosConstants.APP_GROUP_NAME);                      if (CollectionUtils.isEmpty(instanceList)) {                          continue;                      }                      ServiceCache.add(appName, buildServiceInstances(instanceList));                      List pluginNames = getEnabledPlugins(instanceList);                      PluginCache.add(appName, pluginNames);                  }                  ServiceCache.removeExpired(appNames);                  PluginCache.removeExpired(appNames);              } catch (NacosException e) {                  e.printStackTrace();              }          }          private List getEnabledPlugins(List instanceList) {              Instance instance = instanceList.get(0);              Map metadata = instance.getMetadata();              // plugins: DynamicRoute,Auth              String plugins = metadata.getOrDefault("plugins", ShipPluginEnum.DYNAMIC_ROUTE.getName());              return Arrays.stream(plugins.split(",")).collect(Collectors.toList());          }          private List buildServiceInstances(List instanceList) {              List list = new LinkedList<>();              instanceList.forEach(instance -> {                  Map metadata = instance.getMetadata();                  ServiceInstance serviceInstance = new ServiceInstance();                  serviceInstance.setAppName(metadata.get("appName"));                  serviceInstance.setIp(instance.getIp());                  serviceInstance.setPort(instance.getPort());                  serviceInstance.setVersion(metadata.get("version"));                 serviceInstance.setWeight((int) instance.getWeight());                  list.add(serviceInstance);              });              return list;          }      }  }

路由规则数据同步

同时，如果用户在管理后台更新了路由规则，ship-admin需要推送规则数据到ship-server，这里参考了soul网关的做法利用websocket在第一次建立连接后进行全量同步，此后路由规则发生变更就只作增量同步。

最新 Java 核心技术教程，都在这了！

服务端WebsocketSyncCacheServer：

/**   * @Author: Ship   * @Description:   * @Date: Created in 2020/12/28  */  public class WebsocketSyncCacheServer extends WebSocketServer {      private final static Logger LOGGER = LoggerFactory.getLogger(WebsocketSyncCacheServer.class);      private Gson gson = new GsonBuilder().create();      private MessageHandler messageHandler;      public WebsocketSyncCacheServer(Integer port) {          super(new InetSocketAddress(port));          this.messageHandler = new MessageHandler();      }      @Override      public void onOpen(WebSocket webSocket, ClientHandshake clientHandshake) {          LOGGER.info("server is open");     }      @Override      public void onClose(WebSocket webSocket, int i, String s, boolean b) {          LOGGER.info("websocket server close...");      }      @Override      public void onMessage(WebSocket webSocket, String message) {          LOGGER.info("websocket server receive message:\n[{}]", message);          this.messageHandler.handler(message);      }      @Override      public void onError(WebSocket webSocket, Exception e) {      }      @Override      public void onStart() {          LOGGER.info("websocket server start...");      }      class MessageHandler {         public void handler(String message) {              RouteRuleOperationDTO operationDTO = gson.fromJson(message, RouteRuleOperationDTO.class);              if (CollectionUtils.isEmpty(operationDTO.getRuleList())) {                  return;              }              Map> map = operationDTO.getRuleList()                      .stream().collect(Collectors.groupingBy(AppRuleDTO::getAppName));              if (OperationTypeEnum.INSERT.getCode().equals(operationDTO.getOperationType())                      || OperationTypeEnum.UPDATE.getCode().equals(operationDTO.getOperationType())) {                  RouteRuleCache.add(map);              } else if (OperationTypeEnum.DELETE.getCode().equals(operationDTO.getOperationType())) {                  RouteRuleCache.remove(map);             }          }      }  }

客户端WebsocketSyncCacheClient：

/**   * @Author: Ship   * @Description:   * @Date: Created in 2020/12/28   */  @Component  public class WebsocketSyncCacheClient {      private final static Logger LOGGER = LoggerFactory.getLogger(WebsocketSyncCacheClient.class);      private WebSocketClient client;      private RuleService ruleService;      private Gson gson = new GsonBuilder().create();      public WebsocketSyncCacheClient(@Value("${ship.server-web-socket-url}") String serverWebSocketUrl,                                      RuleService ruleService) {          if (StringUtils.isEmpty(serverWebSocketUrl)) {              throw new ShipException(ShipExceptionEnum.CONFIG_ERROR);          }          this.ruleService = ruleService;          ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(1,                  new ShipThreadFactory("websocket-connect", true).create());          try {              client = new WebSocketClient(new URI(serverWebSocketUrl)) {                  @Override                  public void onOpen(ServerHandshake serverHandshake) {                      LOGGER.info("client is open");                      List list = ruleService.getEnabledRule();                      String msg = gson.toJson(new RouteRuleOperationDTO(OperationTypeEnum.INSERT, list));                      send(msg);                  }                  @Override                  public void onMessage(String s) {                  }                  @Override                  public void onClose(int i, String s, boolean b) {                  }                  @Override                  public void onError(Exception e) {                      LOGGER.error("websocket client error", e);                  }              };              client.connectBlocking();              //使用调度线程池进行断线重连，30秒进行一次              executor.scheduleAtFixedRate(() -> {                  if (client != null && client.isClosed()) {                      try {                          client.reconnectBlocking();                      } catch (InterruptedException e) {                          LOGGER.error("reconnect server fail", e);                      }                  }              }, 10, 30, TimeUnit.SECONDS);          } catch (Exception e) {              LOGGER.error("websocket sync cache exception", e);              throw new ShipException(e.getMessage());          }     }      public  void send(T t) {          while (!client.getReadyState().equals(ReadyState.OPEN)) {              LOGGER.debug("connecting ...please wait");          }          client.send(gson.toJson(t));      }  }

四、测试

4.1 动态路由测试

1）本地启动nacos ,sh startup.sh -m standalone

2）启动ship-admin

3）本地启动两个ship-example实例。

实例1配置：

ship:   http:     app-name: order     version: gray_1.0     context-path: /order     port: 8081     admin-url: 127.0.0.1:9001  server:   port: 8081  nacos:   discovery:     server-addr: 127.0.0.1:8848

实例2配置：

ship:    http:      app-name: order      version: prod_1.0      context-path: /order      port: 8082      admin-url: 127.0.0.1:9001 server:    port: 8082  nacos:    discovery:      server-addr: 127.0.0.1:8848

4）在数据库添加路由规则配置，该规则表示当http header 中的name=ship时请求路由到gray_1.0版本的节点。

启动ship-server,看到以下日志时则可以进行测试了。

2021-01-02 19:57:09.159  INFO 30413 --- [SocketWorker-29] cn.sp.sync.WebsocketSyncCacheServer      : websocket server receive message:    [{"operationType":"INSERT","ruleList":[{"id":1,"appId":5,"appName":"order","version":"gray_1.0","matchObject":"HEADER","matchKey":"name","matchMethod":1,"matchRule":"ship","priority":50}]}]

用Postman请求http://localhost:9000/order/user/add,POST方式，header设置name=ship，可以看到只有实例1有日志显示。