Examples with RouterChainGroup com.tencent.polaris.api.plugin.compose.RouterChainGroup used on opensource projects

Example 1 with RouterChainGroup

use of com.tencent.polaris.api.plugin.compose.RouterChainGroup in project polaris-java by polarismesh.

the class BaseFlow method commonGetOneInstance.

/**
 * 通用获取单个服务实例的方法，用于SDK内部调用
 *
 * @param extensions 插件上下文
 * @param serviceKey 服务信息
 * @param coreRouterNames 核心路由插件链
 * @param lbPolicy 负载均衡策略
 * @param protocol 协议信息
 * @param hashKey 一致性hash的key
 * @return 过滤后的实例
 */
public static Instance commonGetOneInstance(Extensions extensions, ServiceKey serviceKey, List<String> coreRouterNames, String lbPolicy, String protocol, String hashKey) {
    ServiceEventKey svcEventKey = new ServiceEventKey(serviceKey, EventType.INSTANCE);
    LOG.info("[ConnectionManager]start to discover service {}", svcEventKey);
    DefaultServiceEventKeysProvider provider = new DefaultServiceEventKeysProvider();
    provider.setSvcEventKey(svcEventKey);
    // 为性能考虑，优先使用本地缓存
    provider.setUseCache(true);
    FlowControlParam flowControlParam = new DefaultFlowControlParam();
    APIConfig apiConfig = extensions.getConfiguration().getGlobal().getAPI();
    flowControlParam.setTimeoutMs(apiConfig.getTimeout());
    flowControlParam.setMaxRetry(apiConfig.getMaxRetryTimes());
    flowControlParam.setRetryIntervalMs(apiConfig.getRetryInterval());
    // 执行服务路由
    ServiceInfo dstSvcInfo = new ServiceInfo();
    Map<String, String> metadata = new HashMap<>();
    metadata.put("protocol", protocol);
    dstSvcInfo.setMetadata(metadata);
    RouteInfo routeInfo = new RouteInfo(null, null, dstSvcInfo, null, "");
    ResourcesResponse resourcesResponse = BaseFlow.syncGetResources(extensions, false, provider, flowControlParam);
    LOG.info("[ConnectionManager]success to discover service {}", svcEventKey);
    ServiceInstances serviceInstances = resourcesResponse.getServiceInstances(svcEventKey);
    RouterChainGroup sysRouterChainGroup = extensions.getSysRouterChainGroup();
    List<ServiceRouter> coreRouters = Extensions.loadServiceRouters(coreRouterNames, extensions.getPlugins(), false);
    RouterChainGroup routerChainGroup = new DefaultRouterChainGroup(sysRouterChainGroup.getBeforeRouters(), coreRouters, sysRouterChainGroup.getAfterRouters());
    ServiceInstances instancesAfterRoute = BaseFlow.processServiceRouters(routeInfo, serviceInstances, routerChainGroup);
    // 执行负载均衡
    LoadBalancer loadBalancer = (LoadBalancer) extensions.getPlugins().getPlugin(PluginTypes.LOAD_BALANCER.getBaseType(), lbPolicy);
    Criteria criteria = new Criteria();
    criteria.setHashKey(hashKey);
    return BaseFlow.processLoadBalance(loadBalancer, criteria, instancesAfterRoute);
}