content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.jstorm.ui.api;
  
  import com.alibaba.jstorm.ui.model.ClusterEntity;
  import com.alibaba.jstorm.ui.utils.UIDef;
  import com.alibaba.jstorm.ui.utils.UIUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RestController;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * @author Jark (wuchong.wc@alibaba-inc.com)
   */
  @RestController
  @RequestMapping(UIDef.API_V2 + "/clusters")
  public class ClustersAPIController {
      private final static Logger LOG = LoggerFactory.getLogger(ClusterAPIController.class);
  
      /**
       *
       * @return Returns all clusters summary information such as nimbus uptime or number of supervisors.
       */
      @RequestMapping("/summary")
      public Map summary(){
          UIUtils.readUiConfig();
          Map<String, List<ClusterEntity>> ret = new HashMap<>();
          ret.put("clusters", new ArrayList<>(UIUtils.clustersCache.values()));
          return ret;
      }
  
  }
  