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.AttachIsoCommand;
  import com.cloud.hypervisor.xenserver.resource.CitrixResourceBase;
  import com.cloud.resource.CommandWrapper;
  import com.cloud.resource.ResourceWrapper;
  import com.cloud.utils.exception.CloudRuntimeException;
  import com.xensource.xenapi.Connection;
  import com.xensource.xenapi.SR;
  import com.xensource.xenapi.Types;
  import com.xensource.xenapi.Types.XenAPIException;
  import com.xensource.xenapi.VBD;
  import com.xensource.xenapi.VDI;
  import com.xensource.xenapi.VM;
  
  @ResourceWrapper(handles =  AttachIsoCommand.class)
  public final class CitrixAttachIsoCommandWrapper extends CommandWrapper<AttachIsoCommand, Answer, CitrixResourceBase> {
  
  
      @Override
      public Answer execute(final AttachIsoCommand command, final CitrixResourceBase citrixResourceBase) {
          final Connection conn = citrixResourceBase.getConnection();
          final boolean attach = command.isAttach();
          final String vmName = command.getVmName();
          final String isoURL = command.getIsoPath();
  
          String errorMsg;
          if (attach) {
              errorMsg = "Failed to attach ISO";
          } else {
              errorMsg = "Failed to detach ISO";
          }
          try {
              if (attach) {
                  VBD isoVBD = null;
  
                  // Find the VM
                  final VM vm = citrixResourceBase.getVM(conn, vmName);
  
                  // Find the ISO VDI
                  final VDI isoVDI = citrixResourceBase.getIsoVDIByURL(conn, vmName, isoURL);
  
                  // Find the VM's CD-ROM VBD
                  final Set<VBD> vbds = vm.getVBDs(conn);
                  for (final VBD vbd : vbds) {
                      final String userDevice = vbd.getUserdevice(conn);
                      final Types.VbdType type = vbd.getType(conn);
  
                      if (userDevice.equals("3") && type == Types.VbdType.CD) {
                          isoVBD = vbd;
                          break;
                      }
                  }
  
                  if (isoVBD == null) {
                      throw new CloudRuntimeException("Unable to find CD-ROM VBD for VM: " + vmName);
                  } else {
                      // If an ISO is already inserted, eject it
                      if (isoVBD.getEmpty(conn) == false) {
                          isoVBD.eject(conn);
                      }
  
                      // Insert the new ISO
                      isoVBD.insert(conn, isoVDI);
                  }
  
                  return new Answer(command);
              } else {
                  // Find the VM
                  final VM vm = citrixResourceBase.getVM(conn, vmName);
                  final String vmUUID = vm.getUuid(conn);
  
                  // Find the ISO VDI
                  final VDI isoVDI = citrixResourceBase.getIsoVDIByURL(conn, vmName, isoURL);
  
                  final SR sr = isoVDI.getSR(conn);
  
                  // Look up all VBDs for this VDI
                  final Set<VBD> vbds = isoVDI.getVBDs(conn);
  
                  // Iterate through VBDs, and if the VBD belongs the VM, eject
                  // the ISO from it
                  for (final VBD vbd : vbds) {
                      final VM vbdVM = vbd.getVM(conn);
                      final String vbdVmUUID = vbdVM.getUuid(conn);
  
                      if (vbdVmUUID.equals(vmUUID)) {
                          // If an ISO is already inserted, eject it
                          if (!vbd.getEmpty(conn)) {
                              vbd.eject(conn);
                          }
  
                          break;
                      }
                  }
  
                  if (!XenServerUtilitiesHelper.isXenServerToolsSR(sr.getNameLabel(conn))) {
                      citrixResourceBase.removeSR(conn, sr);
                  }
  
                  return new Answer(command);
              }
          } catch (final XenAPIException e) {
              logger.warn(errorMsg + ": " + e.toString(), e);
              return new Answer(command, false, e.toString());
          } catch (final Exception e) {
              logger.warn(errorMsg + ": " + e.toString(), e);
              return new Answer(command, false, e.getMessage());
          }
      }
  }
  