content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.alibaba.nacos.naming.remote.rpc.handler;
  
  import com.alibaba.nacos.api.exception.NacosException;
  import com.alibaba.nacos.api.naming.pojo.ServiceInfo;
  import com.alibaba.nacos.api.naming.remote.request.ServiceQueryRequest;
  import com.alibaba.nacos.api.naming.remote.response.QueryServiceResponse;
  import com.alibaba.nacos.api.remote.request.RequestMeta;
  import com.alibaba.nacos.auth.annotation.Secured;
  import com.alibaba.nacos.core.control.TpsControl;
  import com.alibaba.nacos.core.namespace.filter.NamespaceValidation;
  import com.alibaba.nacos.core.paramcheck.ExtractorManager;
  import com.alibaba.nacos.core.paramcheck.impl.ServiceQueryRequestParamExtractor;
  import com.alibaba.nacos.core.remote.RequestHandler;
  import com.alibaba.nacos.naming.core.v2.index.ServiceStorage;
  import com.alibaba.nacos.naming.core.v2.metadata.NamingMetadataManager;
  import com.alibaba.nacos.naming.core.v2.metadata.ServiceMetadata;
  import com.alibaba.nacos.naming.core.v2.pojo.Service;
  import com.alibaba.nacos.naming.utils.NamingRequestUtil;
  import com.alibaba.nacos.naming.utils.ServiceUtil;
  import com.alibaba.nacos.plugin.auth.constant.ActionTypes;
  import org.springframework.stereotype.Component;
  
  /**
   * Nacos query instances request handler.
   *
   * @author xiweng.yy
   */
  @Component
  public class ServiceQueryRequestHandler extends RequestHandler<ServiceQueryRequest, QueryServiceResponse> {
      
      private final ServiceStorage serviceStorage;
      
      private final NamingMetadataManager metadataManager;
      
      public ServiceQueryRequestHandler(ServiceStorage serviceStorage, NamingMetadataManager metadataManager) {
          this.serviceStorage = serviceStorage;
          this.metadataManager = metadataManager;
      }
      
      @Override
      @NamespaceValidation
      @TpsControl(pointName = "RemoteNamingServiceQuery", name = "RemoteNamingServiceQuery")
      @Secured(action = ActionTypes.READ)
      @ExtractorManager.Extractor(rpcExtractor = ServiceQueryRequestParamExtractor.class)
      public QueryServiceResponse handle(ServiceQueryRequest request, RequestMeta meta) throws NacosException {
          String namespaceId = request.getNamespace();
          String groupName = request.getGroupName();
          String serviceName = request.getServiceName();
          Service service = Service.newService(namespaceId, groupName, serviceName);
          String cluster = null == request.getCluster() ? "" : request.getCluster();
          boolean healthyOnly = request.isHealthyOnly();
          ServiceInfo result = serviceStorage.getData(service);
          ServiceMetadata serviceMetadata = metadataManager.getServiceMetadata(service).orElse(null);
          result = ServiceUtil.selectInstancesWithHealthyProtection(result, serviceMetadata, cluster, healthyOnly, true,
                  NamingRequestUtil.getSourceIpForGrpcRequest(meta));
          return QueryServiceResponse.buildSuccessResponse(result);
      }
  }
  