private void handleVplexVolumeErrors(DbClient dbClient) {

    List<String> finalMessages = new ArrayList<String>();

    for (VolumeDescriptor volumeDescriptor :
        VolumeDescriptor.getDescriptors(
            _volumeDescriptors, VolumeDescriptor.Type.VPLEX_VIRT_VOLUME)) {

      Volume volume = dbClient.queryObject(Volume.class, volumeDescriptor.getVolumeURI());

      _log.info("Looking at VPLEX virtual volume {}", volume.getLabel());

      boolean deactivateVirtualVolume = true;
      List<String> livingVolumeNames = new ArrayList<String>();

      _log.info("Its associated volumes are: " + volume.getAssociatedVolumes());
      for (String associatedVolumeUri : volume.getAssociatedVolumes()) {
        Volume associatedVolume =
            dbClient.queryObject(Volume.class, URI.create(associatedVolumeUri));
        if (associatedVolume != null && !associatedVolume.getInactive()) {
          _log.warn(
              "VPLEX virtual volume {} has active associated volume {}",
              volume.getLabel(),
              associatedVolume.getLabel());
          livingVolumeNames.add(associatedVolume.getLabel());
          deactivateVirtualVolume = false;
        }
      }

      if (deactivateVirtualVolume) {
        _log.info(
            "VPLEX virtual volume {} has no active associated volumes, marking for deletion",
            volume.getLabel());
        dbClient.markForDeletion(volume);
      } else {
        String message =
            "VPLEX virtual volume "
                + volume.getLabel()
                + " will not be marked for deletion "
                + "because it still has active associated volumes (";
        message += Joiner.on(",").join(livingVolumeNames) + ")";
        finalMessages.add(message);
        _log.warn(message);
      }
    }

    if (!finalMessages.isEmpty()) {
      String finalMessage = Joiner.on("; ").join(finalMessages) + ".";
      _log.error(finalMessage);
    }
  }
  /**
   * Prepares the VPLEX volume copies.
   *
   * @param name The base name for the volume.
   * @param copyCount The total number of copies.
   * @param copyIndex The index for this copy.
   * @param size The size for the HA volume.
   * @param srcVPlexVolume The VPLEX volume being copied.
   * @param srcProject The project for the VPLEX volume being copied.
   * @param srcVarray The virtual array for the VPLEX volume being copied.
   * @param srcVpool The virtual pool for the VPLEX volume being copied.
   * @param srcSystemURI The VPLEX system URI.
   * @param primaryVolume The primary volume for the copy.
   * @param haVolume The HA volume for the copy, or null.
   * @param taskId The task identifier.
   * @param volumeDescriptors The list of descriptors.
   * @return A reference to the prepared VPLEX volume copy.
   */
  private Volume prepareFullCopyVPlexVolume(
      String name,
      int copyCount,
      int copyIndex,
      long size,
      Volume srcVPlexVolume,
      Project srcProject,
      VirtualArray srcVarray,
      VirtualPool srcVpool,
      URI srcSystemURI,
      Volume primaryVolume,
      Volume haVolume,
      String taskId,
      List<VolumeDescriptor> volumeDescriptors) {

    // Determine the VPLEX volume copy name.
    StringBuilder nameBuilder = new StringBuilder(name);
    if (copyCount > 1) {
      nameBuilder.append("-");
      nameBuilder.append(copyIndex + 1);
    }

    // Prepare the VPLEX volume copy.
    Volume vplexCopyVolume =
        VPlexBlockServiceApiImpl.prepareVolumeForRequest(
            size,
            srcProject,
            srcVarray,
            srcVpool,
            srcSystemURI,
            NullColumnValueGetter.getNullURI(),
            nameBuilder.toString(),
            ResourceOperationTypeEnum.CREATE_VOLUME_FULL_COPY,
            taskId,
            _dbClient);

    // Create a volume descriptor and add it to the passed list.
    VolumeDescriptor vplexCopyVolumeDescr =
        new VolumeDescriptor(
            VolumeDescriptor.Type.VPLEX_VIRT_VOLUME,
            srcSystemURI,
            vplexCopyVolume.getId(),
            null,
            null);
    volumeDescriptors.add(vplexCopyVolumeDescr);

    // Set the associated volumes for this new VPLEX volume copy to
    // the copy of the backend primary and the newly prepared HA
    // volume if the VPLEX volume being copied is distributed.
    vplexCopyVolume.setAssociatedVolumes(new StringSet());
    StringSet assocVolumes = vplexCopyVolume.getAssociatedVolumes();
    assocVolumes.add(primaryVolume.getId().toString());
    if (haVolume != null) {
      assocVolumes.add(haVolume.getId().toString());
    }

    // Set the VPLEX source volume for the copy.
    vplexCopyVolume.setAssociatedSourceVolume(srcVPlexVolume.getId());

    // Copies always created active.
    vplexCopyVolume.setSyncActive(Boolean.TRUE);

    // Persist the copy.
    _dbClient.persistObject(vplexCopyVolume);

    return vplexCopyVolume;
  }
  /** {@inheritDoc} */
  @Override
  public TaskList create(
      List<BlockObject> fcSourceObjList,
      VirtualArray varray,
      String name,
      boolean createInactive,
      int count,
      String taskId) {

    // Populate the descriptors list with all volumes required
    // to create the VPLEX volume copies.
    int sourceCounter = 0;
    URI vplexSrcSystemId = null;
    TaskList taskList = new TaskList();
    List<Volume> vplexCopyVolumes = new ArrayList<Volume>();
    List<VolumeDescriptor> volumeDescriptors = new ArrayList<VolumeDescriptor>();
    List<BlockObject> sortedSourceObjectList = sortFullCopySourceList(fcSourceObjList);
    for (BlockObject fcSourceObj : sortedSourceObjectList) {
      URI fcSourceURI = fcSourceObj.getId();
      if (URIUtil.isType(fcSourceURI, BlockSnapshot.class)) {
        // Full copy of snapshots is not supported for VPLEX.
        return super.create(sortedSourceObjectList, varray, name, createInactive, count, taskId);
      }

      Volume vplexSrcVolume = (Volume) fcSourceObj;
      String copyName = name + (sortedSourceObjectList.size() > 1 ? "-" + ++sourceCounter : "");

      // Create a volume descriptor for the source VPLEX volume being copied.
      // and add it to the descriptors list. Be sure to identify this VPLEX
      // volume as the source volume being copied.
      vplexSrcSystemId = fcSourceObj.getStorageController();
      VolumeDescriptor vplexSrcVolumeDescr =
          new VolumeDescriptor(
              VolumeDescriptor.Type.VPLEX_VIRT_VOLUME, vplexSrcSystemId, fcSourceURI, null, null);
      Map<String, Object> descrParams = new HashMap<String, Object>();
      descrParams.put(VolumeDescriptor.PARAM_IS_COPY_SOURCE_ID, Boolean.TRUE);
      vplexSrcVolumeDescr.setParameters(descrParams);
      volumeDescriptors.add(vplexSrcVolumeDescr);

      // Get some info about the VPLEX volume being copied and its storage
      // system.
      Project vplexSrcProject =
          BlockFullCopyUtils.queryFullCopySourceProject(fcSourceObj, _dbClient);
      StorageSystem vplexSrcSystem = _dbClient.queryObject(StorageSystem.class, vplexSrcSystemId);
      Project vplexSystemProject =
          VPlexBlockServiceApiImpl.getVplexProject(vplexSrcSystem, _dbClient, _tenantsService);

      // For the VPLEX volume being copied, determine which of the associated
      // backend volumes is the primary and, for distributed volumes, which
      // is the HA volume. The primary volume will be natively copied and we
      // we need to place and prepare a volume to hold the copy. This copy
      // will be the primary backend volume for the VPLEX volume copy. For
      // a distributed virtual volume, we will need to place and prepare
      // a volume to hold the HA volume of the VPLEX volume copy.
      Volume vplexSrcPrimaryVolume = null;
      Volume vplexSrcHAVolume = null;
      StringSet assocVolumeURIs = vplexSrcVolume.getAssociatedVolumes();
      Iterator<String> assocVolumeURIsIter = assocVolumeURIs.iterator();
      while (assocVolumeURIsIter.hasNext()) {
        URI assocVolumeURI = URI.create(assocVolumeURIsIter.next());
        Volume assocVolume = _dbClient.queryObject(Volume.class, assocVolumeURI);
        if (assocVolume.getVirtualArray().toString().equals(varray.getId().toString())) {
          vplexSrcPrimaryVolume = assocVolume;
        } else {
          vplexSrcHAVolume = assocVolume;
        }
      }

      // Get the capabilities
      VirtualPool vpool = BlockFullCopyUtils.queryFullCopySourceVPool(fcSourceObj, _dbClient);
      VirtualPoolCapabilityValuesWrapper capabilities =
          getCapabilitiesForFullCopyCreate(fcSourceObj, vpool, count);

      // Get the number of copies to create and the size of the volumes.
      // Note that for the size, we must use the actual provisioned size
      // of the source side backend volume. The size passed in the
      // capabilities will be the size of the VPLEX volume. When the
      // source side backend volume for the copy is provisioned, you
      // might not get that actual size. On VMAX, the size will be slightly
      // larger while for VNX the size will be exactly what is requested.
      // So, if the source side is a VMAX, the source side for the copy
      // will be slightly larger than the size in the capabilities. If the HA
      // side is VNX and we use the size in the capabilities, then you will
      // get exactly that size for the HA backend volume. As a result, source
      // side backend volume for the copy will be slightly larger than the
      // HA side. Now the way a VPLEX copy is made is it uses native full
      // copy to create a native full copy of the source side backend
      // volume. It then provisions the HA side volume. The new source side
      // backend copy is then imported into VPLEX in the same way as is done
      // for a vpool change that imports a volume to VPLEX. This code in the
      // VPLEX controller creates a local VPLEX volume using the source side
      // copy and for a distributed volume it then attaches as a remote
      // mirror the HA backend volume that is provisioned. If the HA volume
      // is slightly smaller, then this will fail on the VPLEX. So, we must
      // ensure that HA side volume is big enough by using the provisioned
      // capacity of the source side backend volume of the VPLEX volume being
      // copied.
      long size = vplexSrcPrimaryVolume.getProvisionedCapacity();

      // Place and prepare a volume for each copy to serve as a native
      // copy of a VPLEX backend volume. The VPLEX backend volume that
      // is copied is the backend volume in the same virtual array as the
      // VPLEX volume i.e, the primary backend volume. Create
      // descriptors for these prepared volumes and add them to the list.
      List<Volume> vplexCopyPrimaryVolumes =
          prepareFullCopyPrimaryVolumes(
              copyName, count, vplexSrcPrimaryVolume, capabilities, volumeDescriptors);

      // If the VPLEX volume being copied is distributed, then the VPLEX
      // HA volume should be non-null. We use the VPLEX scheduler to place
      // and then prepare volumes for the HA volumes of the VPLEX volume
      // copies. This should be done in the same manner as is done for the
      // import volume routine. This is because to form the VPLEX volume
      // copy we import the copy of the primary backend volume.
      List<Volume> vplexCopyHAVolumes = new ArrayList<Volume>();
      if (vplexSrcHAVolume != null) {
        vplexCopyHAVolumes.addAll(
            prepareFullCopyHAVolumes(
                copyName,
                count,
                size,
                vplexSrcSystem,
                vplexSystemProject,
                varray,
                vplexSrcHAVolume,
                taskId,
                volumeDescriptors));
      }

      // For each copy to be created, place and prepare a volume for the
      // primary backend volume copy. When copying a distributed VPLEX
      // volume, we also must place and prepare a volume for the HA
      // backend volume copy. Lastly, we must prepare a volume for the
      // VPLEX volume copy. Create descriptors for these prepared volumes
      // and add them to the volume descriptors list.
      for (int i = 0; i < count; i++) {
        // Prepare a new VPLEX volume for each copy.
        Volume vplexCopyPrimaryVolume = vplexCopyPrimaryVolumes.get(i);
        Volume vplexCopyHAVolume = null;
        if (vplexCopyHAVolumes.size() != 0) {
          vplexCopyHAVolume = vplexCopyHAVolumes.get(i);
        }
        Volume vplexCopyVolume =
            prepareFullCopyVPlexVolume(
                copyName,
                count,
                i,
                size,
                vplexSrcVolume,
                vplexSrcProject,
                varray,
                vpool,
                vplexSrcSystemId,
                vplexCopyPrimaryVolume,
                vplexCopyHAVolume,
                taskId,
                volumeDescriptors);
        vplexCopyVolumes.add(vplexCopyVolume);

        // Create task for each copy.
        Operation op = vplexCopyVolume.getOpStatus().get(taskId);
        TaskResourceRep task = toTask(vplexCopyVolume, taskId, op);
        taskList.getTaskList().add(task);
      }
    }

    // Invoke the VPLEX controller to create the copies.
    try {
      s_logger.info("Getting VPlex controller {}.", taskId);
      VPlexController controller =
          getController(VPlexController.class, DiscoveredDataObject.Type.vplex.toString());
      // TBD controller needs to be updated to handle CGs.
      controller.createFullCopy(vplexSrcSystemId, volumeDescriptors, taskId);
      s_logger.info("Successfully invoked controller.");
    } catch (InternalException e) {
      s_logger.error("Controller error", e);

      // Update the status for the VPLEX volume copies and their
      // corresponding tasks.
      for (Volume vplexCopyVolume : vplexCopyVolumes) {
        Operation op = vplexCopyVolume.getOpStatus().get(taskId);
        if (op != null) {
          op.error(e);
          vplexCopyVolume.getOpStatus().updateTaskStatus(taskId, op);
          _dbClient.persistObject(vplexCopyVolume);
          for (TaskResourceRep task : taskList.getTaskList()) {
            if (task.getResource().getId().equals(vplexCopyVolume.getId())) {
              task.setState(op.getStatus());
              task.setMessage(op.getMessage());
              break;
            }
          }
        }
      }

      // Mark all volumes inactive, except for the VPLEX volume
      // we were trying to copy.
      for (VolumeDescriptor descriptor : volumeDescriptors) {
        if (descriptor.getParameters().get(VolumeDescriptor.PARAM_IS_COPY_SOURCE_ID) == null) {
          Volume volume = _dbClient.queryObject(Volume.class, descriptor.getVolumeURI());
          volume.setInactive(true);
          _dbClient.persistObject(volume);
        }
      }
    }

    return taskList;
  }