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.Iterator;
  import java.util.Set;
  
  import com.cloud.agent.api.Answer;
  import com.cloud.agent.api.CleanupVMCommand;
  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.Types;
  import com.xensource.xenapi.VM;
  
  @ResourceWrapper(handles =  CleanupVMCommand.class)
  public class CitrixCleanupVMCommandWrapper extends CommandWrapper<CleanupVMCommand, Answer, CitrixResourceBase> {
  
      @Override
      public Answer execute(final CleanupVMCommand command, final CitrixResourceBase citrixResourceBase) {
          if (citrixResourceBase.isDestroyHaltedVms()) {
              logger.debug(String.format("Cleanup VM is not needed for host with version %s",
                      citrixResourceBase.getHost().getProductVersion()));
              return new Answer(command);
          }
          final String vmName = command.getVmName();
          try {
              final Connection conn = citrixResourceBase.getConnection();
              final Set<VM> vms = VM.getByNameLabel(conn, vmName);
              if (vms.isEmpty()) {
                  return new Answer(command, true, "VM does not exist");
              }
              // destroy vm which is in HALTED state on this host
              final Iterator<VM> iter = vms.iterator();
              while (iter.hasNext()) {
                  final VM vm = iter.next();
                  final VM.Record vmr = vm.getRecord(conn);
                  if (!Types.VmPowerState.HALTED.equals(vmr.powerState)) {
                      final String msg = String.format("VM %s is not in %s state", vmName, Types.VmPowerState.HALTED);
                      logger.error(msg);
                      return new Answer(command, false, msg);
                  }
                  if (citrixResourceBase.isRefNull(vmr.residentOn)) {
                      continue;
                  }
                  if (vmr.residentOn.getUuid(conn).equals(citrixResourceBase.getHost().getUuid())) {
                      continue;
                  }
                  iter.remove();
              }
              for (final VM vm : vms) {
                  citrixResourceBase.destroyVm(vm, conn, true);
              }
  
          } catch (final Exception e) {
              final String msg = String.format("Clean up VM %s fail due to %s", vmName, e);
              logger.error(msg, e);
              return new Answer(command, false, e.getMessage());
          }
          return new Answer(command);
      }
  }
  