Examples with DeleteCommand com.cloud.legacymodel.communication.command.DeleteCommand used on opensource projects

Example 1 with DeleteCommand

use of com.cloud.legacymodel.communication.command.DeleteCommand in project cosmic by MissionCriticalCloud.

the class TemplateServiceImpl method handleTemplateSync.

@Override
public void handleTemplateSync(final DataStore store) {
    if (store == null) {
        s_logger.warn("Huh? image store is null");
        return;
    }
    final long storeId = store.getId();
    // add lock to make template sync for a data store only be done once
    final String lockString = "templatesync.storeId:" + storeId;
    final GlobalLock syncLock = GlobalLock.getInternLock(lockString);
    try {
        if (syncLock.lock(3)) {
            try {
                final Long zoneId = store.getScope().getScopeId();
                final Map<String, TemplateProp> templateInfos = listTemplate(store);
                if (templateInfos == null) {
                    return;
                }
                final Set<VMTemplateVO> toBeDownloaded = new HashSet<>();
                List<VMTemplateVO> allTemplates = null;
                if (zoneId == null) {
                    // region wide store
                    allTemplates = _templateDao.listByState(VirtualMachineTemplate.State.Active, VirtualMachineTemplate.State.NotUploaded, VirtualMachineTemplate.State.UploadInProgress);
                } else {
                    // zone wide store
                    allTemplates = _templateDao.listInZoneByState(zoneId, VirtualMachineTemplate.State.Active, VirtualMachineTemplate.State.NotUploaded, VirtualMachineTemplate.State.UploadInProgress);
                }
                final List<VMTemplateVO> rtngTmplts = _templateDao.listAllSystemVMTemplates();
                final List<VMTemplateVO> defaultBuiltin = _templateDao.listDefaultBuiltinTemplates();
                if (rtngTmplts != null) {
                    for (final VMTemplateVO rtngTmplt : rtngTmplts) {
                        if (!allTemplates.contains(rtngTmplt)) {
                            allTemplates.add(rtngTmplt);
                        }
                    }
                }
                if (defaultBuiltin != null) {
                    for (final VMTemplateVO builtinTmplt : defaultBuiltin) {
                        if (!allTemplates.contains(builtinTmplt)) {
                            allTemplates.add(builtinTmplt);
                        }
                    }
                }
                toBeDownloaded.addAll(allTemplates);
                final StateMachine2<VirtualMachineTemplate.State, VirtualMachineTemplate.Event, VirtualMachineTemplate> stateMachine = VirtualMachineTemplate.State.getStateMachine();
                for (final VMTemplateVO tmplt : allTemplates) {
                    final String uniqueName = tmplt.getUniqueName();
                    TemplateDataStoreVO tmpltStore = _vmTemplateStoreDao.findByStoreTemplate(storeId, tmplt.getId());
                    if (templateInfos.containsKey(uniqueName)) {
                        final TemplateProp tmpltInfo = templateInfos.remove(uniqueName);
                        toBeDownloaded.remove(tmplt);
                        if (tmpltStore != null) {
                            s_logger.info("Template Sync found " + uniqueName + " already in the image store");
                            if (tmpltStore.getDownloadState() != VMTemplateStatus.DOWNLOADED) {
                                tmpltStore.setErrorString("");
                            }
                            if (tmpltInfo.isCorrupted()) {
                                tmpltStore.setDownloadState(VMTemplateStatus.DOWNLOAD_ERROR);
                                String msg = "Template " + tmplt.getName() + ":" + tmplt.getId() + " is corrupted on secondary storage " + tmpltStore.getId();
                                tmpltStore.setErrorString(msg);
                                s_logger.info(msg);
                                _alertMgr.sendAlert(AlertManager.AlertType.ALERT_TYPE_UPLOAD_FAILED, zoneId, null, msg, msg);
                                if (tmplt.getState() == VirtualMachineTemplate.State.NotUploaded || tmplt.getState() == VirtualMachineTemplate.State.UploadInProgress) {
                                    s_logger.info("Template Sync found " + uniqueName + " on image store " + storeId + " uploaded using SSVM as corrupted, marking it as " + "failed");
                                    tmpltStore.setState(State.Failed);
                                    try {
                                        new StateMachine2Transitions(stateMachine).transitTo(tmplt, VirtualMachineTemplate.Event.OperationFailed, null, _templateDao);
                                    } catch (final NoTransitionException e) {
                                        s_logger.error("Unexpected state transition exception for template " + tmplt.getName() + ". Details: " + e.getMessage());
                                    }
                                } else if (tmplt.getUrl() == null) {
                                    msg = "Private template (" + tmplt + ") with install path " + tmpltInfo.getInstallPath() + " is corrupted, please check in image store: " + tmpltStore.getDataStoreId();
                                    s_logger.warn(msg);
                                } else {
                                    s_logger.info("Removing template_store_ref entry for corrupted template " + tmplt.getName());
                                    _vmTemplateStoreDao.remove(tmpltStore.getId());
                                    toBeDownloaded.add(tmplt);
                                }
                            } else {
                                tmpltStore.setDownloadPercent(100);
                                tmpltStore.setDownloadState(VMTemplateStatus.DOWNLOADED);
                                tmpltStore.setState(ObjectInDataStoreStateMachine.State.Ready);
                                tmpltStore.setInstallPath(tmpltInfo.getInstallPath());
                                tmpltStore.setSize(tmpltInfo.getSize());
                                tmpltStore.setPhysicalSize(tmpltInfo.getPhysicalSize());
                                tmpltStore.setLastUpdated(new Date());
                                // update size in vm_template table
                                final VMTemplateVO tmlpt = _templateDao.findById(tmplt.getId());
                                tmlpt.setSize(tmpltInfo.getSize());
                                _templateDao.update(tmplt.getId(), tmlpt);
                                if (tmplt.getState() == VirtualMachineTemplate.State.NotUploaded || tmplt.getState() == VirtualMachineTemplate.State.UploadInProgress) {
                                    try {
                                        new StateMachine2Transitions(stateMachine).transitTo(tmplt, VirtualMachineTemplate.Event.OperationSucceeded, null, _templateDao);
                                    } catch (final NoTransitionException e) {
                                        s_logger.error("Unexpected state transition exception for template " + tmplt.getName() + ". Details: " + e.getMessage());
                                    }
                                }
                                // which already got checked and incremented during createTemplate API call.
                                if (tmpltInfo.getSize() > 0 && tmplt.getAccountId() != Account.ACCOUNT_ID_SYSTEM && tmplt.getUrl() != null) {
                                    final long accountId = tmplt.getAccountId();
                                    try {
                                        _resourceLimitMgr.checkResourceLimit(_accountMgr.getAccount(accountId), Resource.ResourceType.secondary_storage, tmpltInfo.getSize() - UriUtils.getRemoteSize(tmplt.getUrl()));
                                    } catch (final ResourceAllocationException e) {
                                        s_logger.warn(e.getMessage());
                                        _alertMgr.sendAlert(AlertManager.AlertType.ALERT_TYPE_RESOURCE_LIMIT_EXCEEDED, zoneId, null, e.getMessage(), e.getMessage());
                                    } finally {
                                        _resourceLimitMgr.recalculateResourceCount(accountId, _accountMgr.getAccount(accountId).getDomainId(), Resource.ResourceType.secondary_storage.getOrdinal());
                                    }
                                }
                            }
                            _vmTemplateStoreDao.update(tmpltStore.getId(), tmpltStore);
                        } else {
                            tmpltStore = new TemplateDataStoreVO(storeId, tmplt.getId(), new Date(), 100, VMTemplateStatus.DOWNLOADED, null, null, null, tmpltInfo.getInstallPath(), tmplt.getUrl());
                            tmpltStore.setSize(tmpltInfo.getSize());
                            tmpltStore.setPhysicalSize(tmpltInfo.getPhysicalSize());
                            tmpltStore.setDataStoreRole(store.getRole());
                            _vmTemplateStoreDao.persist(tmpltStore);
                            // update size in vm_template table
                            final VMTemplateVO tmlpt = _templateDao.findById(tmplt.getId());
                            tmlpt.setSize(tmpltInfo.getSize());
                            _templateDao.update(tmplt.getId(), tmlpt);
                            associateTemplateToZone(tmplt.getId(), zoneId);
                        }
                    } else if (tmplt.getState() == VirtualMachineTemplate.State.NotUploaded || tmplt.getState() == VirtualMachineTemplate.State.UploadInProgress) {
                        s_logger.info("Template Sync did not find " + uniqueName + " on image store " + storeId + " uploaded using SSVM, marking it as failed");
                        toBeDownloaded.remove(tmplt);
                        tmpltStore.setDownloadState(VMTemplateStatus.DOWNLOAD_ERROR);
                        final String msg = "Template " + tmplt.getName() + ":" + tmplt.getId() + " is corrupted on secondary storage " + tmpltStore.getId();
                        tmpltStore.setErrorString(msg);
                        tmpltStore.setState(State.Failed);
                        _vmTemplateStoreDao.update(tmpltStore.getId(), tmpltStore);
                        try {
                            new StateMachine2Transitions(stateMachine).transitTo(tmplt, VirtualMachineTemplate.Event.OperationFailed, null, _templateDao);
                        } catch (final NoTransitionException e) {
                            s_logger.error("Unexpected state transition exception for template " + tmplt.getName() + ". Details: " + e.getMessage());
                        }
                    } else {
                        s_logger.info("Template Sync did not find " + uniqueName + " on image store " + storeId + ", may request download based on available hypervisor types");
                        if (tmpltStore != null) {
                            if (_storeMgr.isRegionStore(store) && tmpltStore.getDownloadState() == VMTemplateStatus.DOWNLOADED && tmpltStore.getState() == State.Ready && tmpltStore.getInstallPath() == null) {
                                s_logger.info("Keep fake entry in template store table for migration of previous NFS to object store");
                            } else if (tmpltStore.getState() == State.Ready && tmpltStore.getDownloadState() == VMTemplateStatus.DOWNLOADED) {
                                s_logger.info("Keep template " + uniqueName + " entry as state is Ready and downloaded. No need to download again.");
                            } else {
                                s_logger.info("Removing leftover template " + uniqueName + " entry from template store table");
                                // remove those leftover entries
                                _vmTemplateStoreDao.remove(tmpltStore.getId());
                            }
                        }
                    }
                }
                if (toBeDownloaded.size() > 0) {
                    /* Only download templates whose hypervirsor type is in the zone */
                    final List<HypervisorType> availHypers = _clusterDao.getAvailableHypervisorInZone(zoneId);
                    if (availHypers.isEmpty()) {
                        /*
                             * This is for cloudzone, local secondary storage resource
                             * started before cluster created
                             */
                        availHypers.add(HypervisorType.KVM);
                    }
                    // bug 9809: resume ISO
                    availHypers.add(HypervisorType.None);
                    // download.
                    for (final VMTemplateVO tmplt : toBeDownloaded) {
                        if (tmplt.getUrl() == null) {
                            // If url is null, skip downloading
                            s_logger.info("Skip downloading template " + tmplt.getUniqueName() + " since no url is specified.");
                            continue;
                        }
                        // means that this is a duplicate entry from migration of previous NFS to staging.
                        if (_storeMgr.isRegionStore(store)) {
                            final TemplateDataStoreVO tmpltStore = _vmTemplateStoreDao.findByStoreTemplate(storeId, tmplt.getId());
                            if (tmpltStore != null && tmpltStore.getDownloadState() == VMTemplateStatus.DOWNLOADED && tmpltStore.getState() == State.Ready && tmpltStore.getInstallPath() == null) {
                                s_logger.info("Skip sync template for migration of previous NFS to object store");
                                continue;
                            }
                        }
                        if (availHypers.contains(tmplt.getHypervisorType())) {
                            s_logger.info("Downloading template " + tmplt.getUniqueName() + " to image store " + store.getName());
                            associateTemplateToZone(tmplt.getId(), zoneId);
                            final TemplateInfo tmpl = _templateFactory.getTemplate(tmplt.getId(), DataStoreRole.Image);
                            createTemplateAsync(tmpl, store, null);
                        } else {
                            s_logger.info("Skip downloading of a template because it's not part of the supported hypervisors");
                        }
                    }
                }
                for (final String uniqueName : templateInfos.keySet()) {
                    final TemplateProp tInfo = templateInfos.get(uniqueName);
                    if (_tmpltMgr.templateIsDeleteable(tInfo.getId())) {
                        // we cannot directly call deleteTemplateSync here to reuse delete logic since in this case db does not have this template at all.
                        final TemplateObjectTO tmplTO = new TemplateObjectTO();
                        tmplTO.setDataStore(store.getTO());
                        tmplTO.setPath(tInfo.getInstallPath());
                        tmplTO.setId(tInfo.getId());
                        final DeleteCommand dtCommand = new DeleteCommand(tmplTO);
                        final EndPoint ep = _epSelector.select(store);
                        Answer answer = null;
                        if (ep == null) {
                            final String errMsg = "No remote endpoint to send command, check if host or ssvm is down?";
                            s_logger.error(errMsg);
                            answer = new Answer(dtCommand, false, errMsg);
                        } else {
                            answer = ep.sendMessage(dtCommand);
                        }
                        if (answer == null || !answer.getResult()) {
                            s_logger.info("Failed to deleted template at store: " + store.getName());
                        } else {
                            final String description = "Deleted template " + tInfo.getTemplateName() + " on secondary storage " + storeId;
                            s_logger.info(description);
                        }
                    }
                }
            } finally {
                syncLock.unlock();
            }
        } else {
            s_logger.info("Couldn't get global lock on " + lockString + ", another thread may be doing template sync on data store " + storeId + " now.");
        }
    } finally {
        syncLock.releaseRef();
    }
}

Example 2 with DeleteCommand

use of com.cloud.legacymodel.communication.command.DeleteCommand in project cosmic by MissionCriticalCloud.

the class VolumeServiceImpl method handleVolumeSync.

@Override
public void handleVolumeSync(final DataStore store) {
    if (store == null) {
        s_logger.warn("Huh? image store is null");
        return;
    }
    final long storeId = store.getId();
    // add lock to make template sync for a data store only be done once
    final String lockString = "volumesync.storeId:" + storeId;
    final GlobalLock syncLock = GlobalLock.getInternLock(lockString);
    try {
        if (syncLock.lock(3)) {
            try {
                final Map<Long, TemplateProp> volumeInfos = listVolume(store);
                if (volumeInfos == null) {
                    return;
                }
                // find all the db volumes including those with NULL url column to avoid accidentally deleting volumes on image store later.
                final List<VolumeDataStoreVO> dbVolumes = _volumeStoreDao.listByStoreId(storeId);
                final List<VolumeDataStoreVO> toBeDownloaded = new ArrayList<>(dbVolumes);
                for (final VolumeDataStoreVO volumeStore : dbVolumes) {
                    final VolumeVO volume = volDao.findById(volumeStore.getVolumeId());
                    if (volume == null) {
                        s_logger.warn("Volume_store_ref table shows that volume " + volumeStore.getVolumeId() + " is on image store " + storeId + ", but the volume is not found in volumes table, potentially some bugs in deleteVolume, so we just treat this volume to be deleted and mark " + "it as destroyed");
                        volumeStore.setDestroyed(true);
                        _volumeStoreDao.update(volumeStore.getId(), volumeStore);
                        continue;
                    }
                    // Exists then don't download
                    if (volumeInfos.containsKey(volume.getId())) {
                        final TemplateProp volInfo = volumeInfos.remove(volume.getId());
                        toBeDownloaded.remove(volumeStore);
                        s_logger.info("Volume Sync found " + volume.getUuid() + " already in the volume image store table");
                        if (volumeStore.getDownloadState() != VMTemplateStatus.DOWNLOADED) {
                            volumeStore.setErrorString("");
                        }
                        if (volInfo.isCorrupted()) {
                            volumeStore.setDownloadState(VMTemplateStatus.DOWNLOAD_ERROR);
                            String msg = "Volume " + volume.getUuid() + " is corrupted on image store";
                            volumeStore.setErrorString(msg);
                            s_logger.info(msg);
                            if (volume.getState() == State.NotUploaded || volume.getState() == State.UploadInProgress) {
                                s_logger.info("Volume Sync found " + volume.getUuid() + " uploaded using SSVM on image store " + storeId + " as corrupted, marking it as " + "failed");
                                _volumeStoreDao.update(volumeStore.getId(), volumeStore);
                                // mark volume as failed, so that storage GC will clean it up
                                final VolumeObject volObj = (VolumeObject) volFactory.getVolume(volume.getId());
                                volObj.processEvent(Event.OperationFailed);
                            } else if (volumeStore.getDownloadUrl() == null) {
                                msg = "Volume (" + volume.getUuid() + ") with install path " + volInfo.getInstallPath() + " is corrupted, please check in image store: " + volumeStore.getDataStoreId();
                                s_logger.warn(msg);
                            } else {
                                s_logger.info("Removing volume_store_ref entry for corrupted volume " + volume.getName());
                                _volumeStoreDao.remove(volumeStore.getId());
                                toBeDownloaded.add(volumeStore);
                            }
                        } else {
                            // Put them in right status
                            volumeStore.setDownloadPercent(100);
                            volumeStore.setDownloadState(VMTemplateStatus.DOWNLOADED);
                            volumeStore.setState(ObjectInDataStoreStateMachine.State.Ready);
                            volumeStore.setInstallPath(volInfo.getInstallPath());
                            volumeStore.setSize(volInfo.getSize());
                            volumeStore.setPhysicalSize(volInfo.getPhysicalSize());
                            volumeStore.setLastUpdated(new Date());
                            _volumeStoreDao.update(volumeStore.getId(), volumeStore);
                            if (volume.getSize() == 0) {
                                // Set volume size in volumes table
                                volume.setSize(volInfo.getSize());
                                volDao.update(volumeStore.getVolumeId(), volume);
                            }
                            if (volume.getState() == State.NotUploaded || volume.getState() == State.UploadInProgress) {
                                final VolumeObject volObj = (VolumeObject) volFactory.getVolume(volume.getId());
                                volObj.processEvent(Event.OperationSuccessed);
                            }
                            if (volInfo.getSize() > 0) {
                                try {
                                    _resourceLimitMgr.checkResourceLimit(_accountMgr.getAccount(volume.getAccountId()), Resource.ResourceType.secondary_storage, volInfo.getSize() - volInfo.getPhysicalSize());
                                } catch (final ResourceAllocationException e) {
                                    s_logger.warn(e.getMessage());
                                    _alertMgr.sendAlert(AlertManager.AlertType.ALERT_TYPE_RESOURCE_LIMIT_EXCEEDED, volume.getDataCenterId(), volume.getPodId(), e.getMessage(), e.getMessage());
                                } finally {
                                    _resourceLimitMgr.recalculateResourceCount(volume.getAccountId(), volume.getDomainId(), Resource.ResourceType.secondary_storage.getOrdinal());
                                }
                            }
                        }
                        continue;
                    } else if (volume.getState() == State.NotUploaded || volume.getState() == State.UploadInProgress) {
                        // failed uploads through SSVM
                        s_logger.info("Volume Sync did not find " + volume.getUuid() + " uploaded using SSVM on image store " + storeId + ", marking it as failed");
                        toBeDownloaded.remove(volumeStore);
                        volumeStore.setDownloadState(VMTemplateStatus.DOWNLOAD_ERROR);
                        final String msg = "Volume " + volume.getUuid() + " is corrupted on image store";
                        volumeStore.setErrorString(msg);
                        _volumeStoreDao.update(volumeStore.getId(), volumeStore);
                        // mark volume as failed, so that storage GC will clean it up
                        final VolumeObject volObj = (VolumeObject) volFactory.getVolume(volume.getId());
                        volObj.processEvent(Event.OperationFailed);
                        continue;
                    }
                    // Volume is not on secondary but we should download.
                    if (volumeStore.getDownloadState() != VMTemplateStatus.DOWNLOADED) {
                        s_logger.info("Volume Sync did not find " + volume.getName() + " ready on image store " + storeId + ", will request download to start/resume shortly");
                    }
                }
                // Download volumes which haven't been downloaded yet.
                if (toBeDownloaded.size() > 0) {
                    for (final VolumeDataStoreVO volumeHost : toBeDownloaded) {
                        if (volumeHost.getDownloadUrl() == null) {
                            // If url is null, skip downloading
                            s_logger.info("Skip downloading volume " + volumeHost.getVolumeId() + " since no download url is specified.");
                            continue;
                        }
                        // means that this is a duplicate entry from migration of previous NFS to staging.
                        if (store.getScope().getScopeType() == ScopeType.REGION) {
                            if (volumeHost.getDownloadState() == VMTemplateStatus.DOWNLOADED && volumeHost.getInstallPath() == null) {
                                s_logger.info("Skip sync volume for migration of previous NFS to object store");
                                continue;
                            }
                        }
                        s_logger.debug("Volume " + volumeHost.getVolumeId() + " needs to be downloaded to " + store.getName());
                        // reset volume status back to Allocated
                        VolumeObject vol = (VolumeObject) volFactory.getVolume(volumeHost.getVolumeId());
                        // reset back volume status
                        vol.processEvent(Event.OperationFailed);
                        // remove leftover volume_store_ref entry since re-download will create it again
                        _volumeStoreDao.remove(volumeHost.getId());
                        // get an updated volumeVO
                        vol = (VolumeObject) volFactory.getVolume(volumeHost.getVolumeId());
                        final RegisterVolumePayload payload = new RegisterVolumePayload(volumeHost.getDownloadUrl(), volumeHost.getChecksum(), vol.getFormat().toString());
                        vol.addPayload(payload);
                        createVolumeAsync(vol, store);
                    }
                }
                // Delete volumes which are not present on DB.
                for (final Map.Entry<Long, TemplateProp> entry : volumeInfos.entrySet()) {
                    final Long uniqueName = entry.getKey();
                    final TemplateProp tInfo = entry.getValue();
                    // we cannot directly call expungeVolumeAsync here to reuse delete logic since in this case db does not have this volume at all.
                    final VolumeObjectTO tmplTO = new VolumeObjectTO();
                    tmplTO.setDataStore(store.getTO());
                    tmplTO.setPath(tInfo.getInstallPath());
                    tmplTO.setId(tInfo.getId());
                    final DeleteCommand dtCommand = new DeleteCommand(tmplTO);
                    final EndPoint ep = _epSelector.select(store);
                    Answer answer = null;
                    if (ep == null) {
                        final String errMsg = "No remote endpoint to send command, check if host or ssvm is down?";
                        s_logger.error(errMsg);
                        answer = new Answer(dtCommand, false, errMsg);
                    } else {
                        answer = ep.sendMessage(dtCommand);
                    }
                    if (answer == null || !answer.getResult()) {
                        s_logger.info("Failed to deleted volume at store: " + store.getName());
                    } else {
                        final String description = "Deleted volume " + tInfo.getTemplateName() + " on secondary storage " + storeId;
                        s_logger.info(description);
                    }
                }
            } finally {
                syncLock.unlock();
            }
        } else {
            s_logger.info("Couldn't get global lock on " + lockString + ", another thread may be doing volume sync on data store " + storeId + " now.");
        }
    } finally {
        syncLock.releaseRef();
    }
}

Example 3 with DeleteCommand

use of com.cloud.legacymodel.communication.command.DeleteCommand in project cosmic by MissionCriticalCloud.

the class CloudStackPrimaryDataStoreDriverImpl method deleteAsync.

@Override
public void deleteAsync(final DataStore dataStore, final DataObject data, final AsyncCompletionCallback<CommandResult> callback) {
    final DeleteCommand cmd = new DeleteCommand(data.getTO());
    final CommandResult result = new CommandResult();
    try {
        EndPoint ep = null;
        if (data.getType() == DataObjectType.VOLUME) {
            ep = epSelector.select(data, StorageAction.DELETEVOLUME);
        } else {
            ep = epSelector.select(data);
        }
        if (ep == null) {
            final String errMsg = "No remote endpoint to send DeleteCommand, check if host or ssvm is down?";
            s_logger.error(errMsg);
            result.setResult(errMsg);
        } else {
            final Answer answer = ep.sendMessage(cmd);
            if (answer != null && !answer.getResult()) {
                result.setResult(answer.getDetails());
            }
        }
    } catch (final Exception ex) {
        s_logger.debug("Unable to destoy volume" + data.getId(), ex);
        result.setResult(ex.toString());
    }
    callback.complete(result);
}

Example 4 with DeleteCommand

use of com.cloud.legacymodel.communication.command.DeleteCommand in project cosmic by MissionCriticalCloud.

the class BaseImageStoreDriverImpl method deleteAsync.

@Override
public void deleteAsync(final DataStore dataStore, final DataObject data, final AsyncCompletionCallback<CommandResult> callback) {
    final CommandResult result = new CommandResult();
    try {
        final DeleteCommand cmd = new DeleteCommand(data.getTO());
        final EndPoint ep = this._epSelector.select(data);
        Answer answer = null;
        if (ep == null) {
            final String errMsg = "No remote endpoint to send command, check if host or ssvm is down?";
            s_logger.error(errMsg);
            answer = new Answer(cmd, false, errMsg);
        } else {
            answer = ep.sendMessage(cmd);
        }
        if (answer != null && !answer.getResult()) {
            result.setResult(answer.getDetails());
        }
    } catch (final Exception ex) {
        s_logger.debug("Unable to destoy " + data.getType().toString() + ": " + data.getId(), ex);
        result.setResult(ex.toString());
    }
    callback.complete(result);
}