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 backtype.storm.generated.*;
  import backtype.storm.utils.NimbusClient;
  import com.alibaba.jstorm.ui.model.UIStreamMetric;
  import com.alibaba.jstorm.ui.model.TaskEntity;
  import com.alibaba.jstorm.ui.model.UITaskMetric;
  import com.alibaba.jstorm.ui.utils.NimbusClientManager;
  import com.alibaba.jstorm.ui.utils.UIMetricUtils;
  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;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * @author Jark (wuchong.wc@alibaba-inc.com)
   */
  @Controller
  public class TaskController {
      private static final Logger LOG = LoggerFactory.getLogger(TaskController.class);
  
      @RequestMapping(value = "/task", method = RequestMethod.GET)
      public String show(@RequestParam(value = "cluster", required = true) String clusterName,
                         @RequestParam(value = "topology", required = true) String topology_id,
                         @RequestParam(value = "component", required = true) String component,
                         @RequestParam(value = "id", required = true) String task_id,
                         @RequestParam(value = "win", required = false) String win,
                         ModelMap model) {
          clusterName = StringEscapeUtils.escapeHtml(clusterName);
          topology_id = StringEscapeUtils.escapeHtml(topology_id);
          long start = System.currentTimeMillis();
          int window = UIUtils.parseWindow(win);
          UIUtils.addWindowAttribute(model, window);
          NimbusClient client = null;
          try {
              client = NimbusClientManager.getNimbusClient(clusterName);
  
              //get task entity
              TopologyInfo topologyInfo = client.getClient().getTopologyInfo(topology_id);
              int id = JStormUtils.parseInt(task_id);
              TaskEntity task = UIUtils.getTaskEntity(topologyInfo.get_tasks(), id);
              task.setComponent(component);
              model.addAttribute("task", task);
  
              //get task metric
              List<MetricInfo> taskStreamMetrics = client.getClient().getTaskAndStreamMetrics(topology_id, id);
  //            System.out.println("taskMetrics size:"+getSize(taskMetrics));
              UITaskMetric taskMetric = UIMetricUtils.getTaskMetric(taskStreamMetrics, component, id, window);
              model.addAttribute("taskMetric", taskMetric);
              model.addAttribute("taskHead", UIMetricUtils.sortHead(taskMetric, UITaskMetric.HEAD));
  
              //get stream metric
              List<UIStreamMetric> streamData = UIMetricUtils.getStreamMetrics(taskStreamMetrics, component, id, window);
              model.addAttribute("streamData", streamData);
              model.addAttribute("streamHead", UIMetricUtils.sortHead(streamData, UIStreamMetric.HEAD));
  
          } catch (NotAliveException nae) {
              model.addAttribute("flush", String.format("The topology: %s is dead", topology_id));
          } catch (Exception e) {
              NimbusClientManager.removeClient(clusterName);
              LOG.error(e.getMessage(), e);
              UIUtils.addErrorAttribute(model, e);
          }
          model.addAttribute("clusterName", clusterName);
          model.addAttribute("topologyId", topology_id);
          model.addAttribute("compName", component);
          model.addAttribute("page", "task");
          UIUtils.addTitleAttribute(model, "Task Summary");
  
          LOG.info("task page show cost:{}ms", System.currentTimeMillis() - start);
          return "task";
      }
  
  }
  