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.csp.sentinel.command.handler;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  import com.alibaba.csp.sentinel.command.CommandHandler;
  import com.alibaba.csp.sentinel.command.CommandRequest;
  import com.alibaba.csp.sentinel.command.CommandResponse;
  import com.alibaba.csp.sentinel.command.annotation.CommandMapping;
  import com.alibaba.csp.sentinel.node.ClusterNode;
  import com.alibaba.csp.sentinel.command.vo.NodeVo;
  import com.alibaba.csp.sentinel.slotchain.ResourceWrapper;
  import com.alibaba.csp.sentinel.slots.clusterbuilder.ClusterBuilderSlot;
  import com.alibaba.fastjson.JSONArray;
  
  /**
   * @author jialiang.linjl
   */
  @CommandMapping(name = "clusterNode", desc = "get all clusterNode VO, use type=notZero to ignore those nodes with totalRequest <=0")
  public class FetchSimpleClusterNodeCommandHandler implements CommandHandler<String> {
  
      @Override
      public CommandResponse<String> handle(CommandRequest request) {
          /*
           * type==notZero means nodes whose totalRequest <= 0 will be ignored.
           */
          String type = request.getParam("type");
          List<NodeVo> list = new ArrayList<NodeVo>();
          Map<ResourceWrapper, ClusterNode> map = ClusterBuilderSlot.getClusterNodeMap();
          if (map == null) {
              return CommandResponse.ofSuccess(JSONArray.toJSONString(list));
          }
          for (Map.Entry<ResourceWrapper, ClusterNode> entry : map.entrySet()) {
              if ("notZero".equalsIgnoreCase(type)) {
                  if (entry.getValue().totalRequest() > 0) {
                      list.add(NodeVo.fromClusterNode(entry.getKey(), entry.getValue()));
                  }
              } else {
                  list.add(NodeVo.fromClusterNode(entry.getKey(), entry.getValue()));
              }
          }
          return CommandResponse.ofSuccess(JSONArray.toJSONString(list));
      }
  
  }
  