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.xenserver.resource.wrapper.xenbase;
  
  import java.util.Set;
  
  
  import com.cloud.agent.api.Answer;
  import com.cloud.agent.api.storage.DestroyCommand;
  import com.cloud.agent.api.to.VolumeTO;
  import com.cloud.hypervisor.xenserver.resource.CitrixResourceBase;
  import com.cloud.resource.CommandWrapper;
  import com.cloud.resource.ResourceWrapper;
  import com.xensource.xenapi.Connection;
  import com.xensource.xenapi.VBD;
  import com.xensource.xenapi.VDI;
  
  @ResourceWrapper(handles =  DestroyCommand.class)
  public final class CitrixDestroyCommandWrapper extends CommandWrapper<DestroyCommand, Answer, CitrixResourceBase> {
  
  
      @Override
      public Answer execute(final DestroyCommand command, final CitrixResourceBase citrixResourceBase) {
          final Connection conn = citrixResourceBase.getConnection();
          final VolumeTO vol = command.getVolume();
          // Look up the VDI
          final String volumeUUID = vol.getPath();
          VDI vdi = null;
          try {
              vdi = citrixResourceBase.getVDIbyUuid(conn, volumeUUID);
          } catch (final Exception e) {
              return new Answer(command, true, "Success");
          }
          Set<VBD> vbds = null;
          try {
              vbds = vdi.getVBDs(conn);
          } catch (final Exception e) {
              final String msg = "VDI getVBDS for " + volumeUUID + " failed due to " + e.toString();
              logger.warn(msg, e);
              return new Answer(command, false, msg);
          }
          for (final VBD vbd : vbds) {
              try {
                  vbd.unplug(conn);
                  vbd.destroy(conn);
              } catch (final Exception e) {
                  final String msg = "VM destroy for " + volumeUUID + "  failed due to " + e.toString();
                  logger.warn(msg, e);
                  return new Answer(command, false, msg);
              }
          }
          try {
              final Set<VDI> snapshots = vdi.getSnapshots(conn);
              for (final VDI snapshot : snapshots) {
                  snapshot.destroy(conn);
              }
              vdi.destroy(conn);
          } catch (final Exception e) {
              final String msg = "VDI destroy for " + volumeUUID + " failed due to " + e.toString();
              logger.warn(msg, e);
              return new Answer(command, false, msg);
          }
  
          return new Answer(command, true, "Success");
      }
  }
  