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.address.controller;
  
  import com.alibaba.nacos.address.component.AddressServerGeneratorManager;
  import com.alibaba.nacos.api.common.Constants;
  import com.alibaba.nacos.api.naming.pojo.ServiceInfo;
  import com.alibaba.nacos.api.naming.utils.NamingUtils;
  import com.alibaba.nacos.naming.core.v2.ServiceManager;
  import com.alibaba.nacos.naming.core.v2.index.ServiceStorage;
  import com.alibaba.nacos.naming.core.v2.metadata.ClusterMetadata;
  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.ServiceUtil;
  import org.springframework.http.HttpStatus;
  import org.springframework.http.ResponseEntity;
  import org.springframework.web.bind.annotation.PathVariable;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.bind.annotation.RestController;
  
  import java.util.Optional;
  
  /**
   * Server list controller.
   *
   * @author pbting
   * @since 1.1.0
   */
  @RestController
  public class ServerListController {
      
      private final AddressServerGeneratorManager addressServerBuilderManager;
      
      private final NamingMetadataManager metadataManager;
      
      private final ServiceStorage serviceStorage;
      
      public ServerListController(AddressServerGeneratorManager addressServerBuilderManager,
              NamingMetadataManager metadataManager, ServiceStorage serviceStorage) {
          this.addressServerBuilderManager = addressServerBuilderManager;
          this.metadataManager = metadataManager;
          this.serviceStorage = serviceStorage;
      }
      
      /**
       * Get cluster.
       *
       * @param product will get Ip list of that products to be associated
       * @param cluster will get Ip list of that product cluster to be associated
       * @return result of get
       */
      @RequestMapping(value = "/{product}/{cluster}", method = RequestMethod.GET)
      public ResponseEntity<String> getCluster(@PathVariable String product, @PathVariable String cluster) {
          
          String productName = addressServerBuilderManager.generateProductName(product);
          String serviceName = addressServerBuilderManager.generateNacosServiceName(productName);
          String serviceWithoutGroup = NamingUtils.getServiceName(serviceName);
          String groupName = NamingUtils.getGroupName(serviceName);
          Optional<Service> service = ServiceManager.getInstance()
                  .getSingletonIfExist(Constants.DEFAULT_NAMESPACE_ID, groupName, serviceWithoutGroup);
          if (!service.isPresent()) {
              return ResponseEntity.status(HttpStatus.NOT_FOUND).body("product=" + product + " not found.");
          }
          ClusterMetadata metadata = metadataManager.getServiceMetadata(service.get()).orElse(new ServiceMetadata())
                  .getClusters().get(cluster);
          if (null == metadata) {
              return ResponseEntity.status(HttpStatus.NOT_FOUND)
                      .body("product=" + product + ",cluster=" + cluster + " not found.");
          }
          ServiceInfo serviceInfo = serviceStorage.getData(service.get());
          serviceInfo = ServiceUtil.selectInstances(serviceInfo, cluster, false);
          return ResponseEntity.status(HttpStatus.OK)
                  .body(addressServerBuilderManager.generateResponseIps(serviceInfo.getHosts()));
      }
  }
  