/**
   * start a topology: set active status of the topology
   *
   * @param topologyName
   * @param stormClusterState
   * @param topologyId
   * @throws Exception
   */
  public void setTopologyStatus(TopologyAssignEvent event) throws Exception {
    StormClusterState stormClusterState = nimbusData.getStormClusterState();

    String topologyId = event.getTopologyId();
    String topologyName = event.getTopologyName();
    String group = event.getGroup();

    StormStatus status = new StormStatus(StatusType.active);
    if (event.getOldStatus() != null) {
      status = event.getOldStatus();
    }

    StormBase stormBase = stormClusterState.storm_base(topologyId, null);
    if (stormBase == null) {
      stormBase = new StormBase(topologyName, TimeUtils.current_time_secs(), status, group);
      stormClusterState.activate_storm(topologyId, stormBase);

    } else {

      stormClusterState.update_storm(topologyId, status);

      // here exist one hack operation
      // when monitor/rebalance/startup topologyName is null
      if (topologyName == null) {
        event.setTopologyName(stormBase.getStormName());
      }
    }

    LOG.info("Update " + topologyId + " " + status);
  }
  /**
   * Get TopologyInfo, it contain all data of the topology running status
   *
   * @return TopologyInfo
   */
  @Override
  public TopologyInfo getTopologyInfo(String topologyId) throws NotAliveException, TException {

    TopologyInfo topologyInfo = new TopologyInfo();

    StormClusterState stormClusterState = data.getStormClusterState();

    try {

      // get topology's StormBase
      StormBase base = stormClusterState.storm_base(topologyId, null);
      if (base == null) {
        throw new NotAliveException("No topology of " + topologyId);
      }
      topologyInfo.set_id(topologyId);
      topologyInfo.set_name(base.getStormName());
      topologyInfo.set_uptime_secs(TimeUtils.time_delta(base.getLanchTimeSecs()));
      topologyInfo.set_status(base.getStatusString());

      // get topology's Assignment
      Assignment assignment = stormClusterState.assignment_info(topologyId, null);
      if (assignment == null) {
        throw new TException("Failed to get StormBase from ZK of " + topologyId);
      }

      // get topology's map<taskId, componentId>
      Map<Integer, String> taskInfo = Cluster.topology_task_info(stormClusterState, topologyId);

      List<TaskSummary> tasks =
          NimbusUtils.mkTaskSummary(stormClusterState, assignment, taskInfo, topologyId);
      topologyInfo.set_tasks(tasks);

      return topologyInfo;
    } catch (TException e) {
      LOG.info("Failed to get topologyInfo " + topologyId, e);
      throw e;
    } catch (Exception e) {
      LOG.info("Failed to get topologyInfo " + topologyId, e);
      throw new TException("Failed to get topologyInfo" + topologyId);
    }
  }
  /**
   * get cluster's summary, it will contain SupervisorSummary and TopologySummary
   *
   * @return ClusterSummary
   */
  @Override
  public ClusterSummary getClusterInfo() throws TException {

    try {

      StormClusterState stormClusterState = data.getStormClusterState();

      Map<String, Assignment> assignments = new HashMap<String, Assignment>();

      // get nimbus running time
      int uptime = data.uptime();

      // get TopologySummary
      List<TopologySummary> topologySummaries = new ArrayList<TopologySummary>();

      // get all active topology's StormBase
      Map<String, StormBase> bases = Cluster.topology_bases(stormClusterState);
      for (Entry<String, StormBase> entry : bases.entrySet()) {

        String topologyId = entry.getKey();
        StormBase base = entry.getValue();

        Assignment assignment = stormClusterState.assignment_info(topologyId, null);
        if (assignment == null) {
          LOG.error("Failed to get assignment of " + topologyId);
          continue;
        }
        assignments.put(topologyId, assignment);
        String group = "default";
        if (data.isGroupMode()) group = base.getGroup();
        if (group == null) group = "default";

        TopologySummary topology =
            NimbusUtils.mkTopologySummary(
                assignment,
                topologyId,
                base.getStormName(),
                base.getStatusString(),
                TimeUtils.time_delta(base.getLanchTimeSecs()),
                group);

        topologySummaries.add(topology);
      }

      // all supervisors
      Map<String, SupervisorInfo> supervisorInfos =
          Cluster.allSupervisorInfo(stormClusterState, null);

      // generate SupervisorSummaries
      List<SupervisorSummary> supervisorSummaries =
          NimbusUtils.mkSupervisorSummaries(supervisorInfos, assignments);

      return new ClusterSummary(
          supervisorSummaries,
          uptime,
          topologySummaries,
          data.getGroupToTopology(),
          data.getGroupToResource(),
          data.getGroupToUsedResource(),
          data.isGroupMode());

    } catch (TException e) {
      LOG.info("Failed to get ClusterSummary ", e);
      throw e;
    } catch (Exception e) {
      LOG.info("Failed to get ClusterSummary ", e);
      throw new TException(e);
    }
  }