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.Response;
  import com.alibaba.jstorm.ui.utils.UIUtils;
  import com.alibaba.jstorm.utils.JStormUtils;
  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;
  
  /**
   * @author Jark (wuchong.wc@alibaba-inc.com)
   */
  @Controller
  public class JStackController {
      private static final Logger LOG = LoggerFactory.getLogger(JStackController.class);
  
      @RequestMapping(value = "/jstack", method = RequestMethod.GET)
      public String show(@RequestParam(value = "cluster", required = true) String clusterName,
                         @RequestParam(value = "host", required = true) String host,
                         @RequestParam(value = "port", required = true) String logServerPort,
                         @RequestParam(value = "wport", required = true) String workerPort,
                         ModelMap model) {
  
          if (UIUtils.isValidSupervisorHost(clusterName, host)) {
              UIUtils.addErrorAttribute(model, new RuntimeException("Not a valid host: " + host));
              return "jstack";
          }
  
          clusterName = StringEscapeUtils.escapeHtml(clusterName);
          int i_logServerPort = JStormUtils.parseInt(logServerPort);
          int i_workerPort = JStormUtils.parseInt(workerPort);
  
          requestJStack(host, i_logServerPort, i_workerPort, model);
          model.addAttribute("clusterName", clusterName);
          return "jstack";
      }
  
      private void requestJStack(String host, int logServerPort, int workerPort, ModelMap model){
          String hostip = host + ":" +workerPort;
          Response res = UIUtils.getJStack(host, logServerPort, workerPort);
          String summary = null;
          String jstack = null;
          if(res.getStatus() > 0){
              if(res.getStatus() == 200){
                  jstack = res.getData();
              }else{
                  summary = "The JStack of <code>" + hostip + "</code> isn't exist <br/> " + res.getData();
              }
          }else{
              summary = "Failed to JStack of <code>" + hostip + "</code> <br/>" + res.getData();
          }
          model.addAttribute("jstack", jstack);
          model.addAttribute("summary", summary);
          model.addAttribute("hostip", hostip);
          UIUtils.addTitleAttribute(model, "JStack");
  
      }
  }
  