public void vcenterClusterCreateDatastoreOperation(
      URI vcenterId,
      URI vcenterDataCenterId,
      URI clusterId,
      URI volumeId,
      String selectHostStepId,
      String stepId) {
    VcenterApiClient vcenterApiClient = null;
    try {
      WorkflowStepCompleter.stepExecuting(stepId);

      URI hostId = (URI) _workflowService.loadStepData(selectHostStepId);
      if (hostId == null) {
        _log.error("Workflow loadStepData on " + selectHostStepId + " is null");
        throw new Exception("Workflow loadStepData on " + selectHostStepId + " is null");
      }

      VcenterDataCenter vcenterDataCenter =
          _dbClient.queryObject(VcenterDataCenter.class, vcenterDataCenterId);
      Cluster cluster = _dbClient.queryObject(Cluster.class, clusterId);
      Vcenter vcenter = _dbClient.queryObject(Vcenter.class, vcenterId);
      Host host = _dbClient.queryObject(Host.class, hostId);
      Volume volume = _dbClient.queryObject(Volume.class, volumeId);

      vcenterApiClient = new VcenterApiClient(_coordinator.getPropertyInfo());
      vcenterApiClient.setup(vcenter.getIpAddress(), vcenter.getUsername(), vcenter.getPassword());
      String key =
          vcenterApiClient.createDatastore(
              vcenterDataCenter.getLabel(),
              cluster.getExternalId(),
              host.getHostName(),
              volume.getWWN(),
              volume.getLabel());
      _log.info("Successfully created or located datastore " + volume.getLabel() + " " + key);

      host.setVcenterDataCenter(vcenterDataCenter.getId());
      _dbClient.updateAndReindexObject(host);

      WorkflowStepCompleter.stepSucceded(stepId);
    } catch (Exception e) {
      _log.error("vcenterClusterCreateDatastoreOperation exception " + e);
      WorkflowStepCompleter.stepFailed(
          stepId, VcenterControllerException.exceptions.hostException(e.getLocalizedMessage(), e));
    } finally {
      if (vcenterApiClient != null) vcenterApiClient.destroy();
    }
  }