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.controller;
  
  import com.alibaba.jstorm.ui.model.ClusterConfig;
  import com.alibaba.jstorm.ui.model.ZookeeperNode;
  import com.alibaba.jstorm.ui.utils.UIDef;
  import com.alibaba.jstorm.ui.utils.UIUtils;
  import com.alibaba.jstorm.ui.utils.ZookeeperManager;
  import org.apache.commons.lang.StringEscapeUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.stereotype.Controller;
  import org.springframework.ui.ModelMap;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.bind.annotation.RequestParam;
  import org.springframework.web.bind.annotation.ResponseBody;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * @author Donne (lindeqiang1988@gmail.com)
   */
  @Controller
  public class ZookeeperController {
      private static final Logger LOG = LoggerFactory.getLogger(ZookeeperController.class);
  
  
      @RequestMapping(value = "/zookeeper", method = RequestMethod.GET)
      public String show(@RequestParam(value = "name", required = true) String name,
                         ModelMap model) {
          name = StringEscapeUtils.escapeHtml(name);
          long start = System.currentTimeMillis();
          try{
              ClusterConfig config = UIUtils.clusterConfig.get(name);
              StringBuilder builder = new StringBuilder("");
              for (String ip:config.getZkServers()){
                  builder.append(ip).append(",");
              }
              builder.deleteCharAt(builder.length() - 1);
              builder.append(":");
              builder.append(config.getZkPort());
              model.addAttribute("zkRoot", config.getZkRoot());
              model.addAttribute("zkServers", builder.toString());
              model.addAttribute("clusterName",name);
          }catch (Exception e){
              LOG.error(e.getMessage(), e);
              UIUtils.addErrorAttribute(model, e);
          }
  
          LOG.info("zookeeper page show cost:{}ms", System.currentTimeMillis() - start);
          return "zookeeper";
      }
  
      @RequestMapping(value = UIDef.API_V2 + "/zookeeper/node", produces = "application/json;")
      @ResponseBody
      public Map<String, Object> getChildren(@RequestParam String path, String clusterName)  {
          clusterName = StringEscapeUtils.escapeHtml(clusterName);
          List<ZookeeperNode> result  = ZookeeperManager.listZKNodes(clusterName, path);
          Map<String, Object> map = new HashMap<>();
          map.put("nodes", result);
          return map;
      }
  
      @RequestMapping(value = UIDef.API_V2 + "/zookeeper/node/data", produces = "application/json;")
      @ResponseBody
      public Map<String, Object> getData(@RequestParam String path, String clusterName) {
          clusterName = StringEscapeUtils.escapeHtml(clusterName);
          String data = ZookeeperManager.getZKNodeData(clusterName, path);
          Map<String, Object> map = new HashMap<>();
          map.put("data", data);
          return map;
      }
  }
  
  