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.cloud.hypervisor.kvm.resource.wrapper;
  
  import java.util.UUID;
  
  import com.cloud.agent.api.Answer;
  import com.cloud.agent.api.CreateVolumeFromSnapshotAnswer;
  import com.cloud.agent.api.CreateVolumeFromSnapshotCommand;
  import com.cloud.agent.api.to.StorageFilerTO;
  import com.cloud.hypervisor.kvm.resource.LibvirtComputingResource;
  import com.cloud.hypervisor.kvm.storage.KVMPhysicalDisk;
  import com.cloud.hypervisor.kvm.storage.KVMStoragePool;
  import com.cloud.hypervisor.kvm.storage.KVMStoragePoolManager;
  import com.cloud.resource.CommandWrapper;
  import com.cloud.resource.ResourceWrapper;
  import com.cloud.utils.exception.CloudRuntimeException;
  
  @ResourceWrapper(handles =  CreateVolumeFromSnapshotCommand.class)
  public final class LibvirtCreateVolumeFromSnapshotCommandWrapper extends CommandWrapper<CreateVolumeFromSnapshotCommand, Answer, LibvirtComputingResource> {
  
      @Override
      public Answer execute(final CreateVolumeFromSnapshotCommand command, final LibvirtComputingResource libvirtComputingResource) {
          try {
  
              String snapshotPath = command.getSnapshotUuid();
              final int index = snapshotPath.lastIndexOf("/");
              snapshotPath = snapshotPath.substring(0, index);
  
              final KVMStoragePoolManager storagePoolMgr = libvirtComputingResource.getStoragePoolMgr();
              final KVMStoragePool secondaryPool = storagePoolMgr.getStoragePoolByURI(command.getSecondaryStorageUrl() + snapshotPath);
              final KVMPhysicalDisk snapshot = secondaryPool.getPhysicalDisk(command.getSnapshotName());
  
              final String primaryUuid = command.getPrimaryStoragePoolNameLabel();
  
              final StorageFilerTO pool = command.getPool();
              final KVMStoragePool primaryPool = storagePoolMgr.getStoragePool(pool.getType(), primaryUuid);
  
              final String volUuid = UUID.randomUUID().toString();
              final KVMPhysicalDisk disk = storagePoolMgr.copyPhysicalDisk(snapshot, volUuid, primaryPool, 0);
  
              if (disk == null) {
                  throw new NullPointerException("Disk was not successfully copied to the new storage.");
              }
  
              return new CreateVolumeFromSnapshotAnswer(command, true, "", disk.getName());
          } catch (final CloudRuntimeException e) {
              return new CreateVolumeFromSnapshotAnswer(command, false, e.toString(), null);
          } catch (final Exception e) {
              return new CreateVolumeFromSnapshotAnswer(command, false, e.toString(), null);
          }
      }
  }
  