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 com.cloud.agent.api.PrepareUnmanageVMInstanceAnswer;
  import com.cloud.agent.api.PrepareUnmanageVMInstanceCommand;
  import com.cloud.hypervisor.kvm.resource.LibvirtComputingResource;
  import com.cloud.resource.CommandWrapper;
  import com.cloud.resource.ResourceWrapper;
  import org.libvirt.Connect;
  import org.libvirt.Domain;
  
  @ResourceWrapper(handles=PrepareUnmanageVMInstanceCommand.class)
  public final class LibvirtPrepareUnmanageVMInstanceCommandWrapper extends CommandWrapper<PrepareUnmanageVMInstanceCommand, PrepareUnmanageVMInstanceAnswer, LibvirtComputingResource> {
      @Override
      public PrepareUnmanageVMInstanceAnswer execute(PrepareUnmanageVMInstanceCommand command, LibvirtComputingResource libvirtComputingResource) {
          final String vmName = command.getInstanceName();
          final LibvirtUtilitiesHelper libvirtUtilitiesHelper = libvirtComputingResource.getLibvirtUtilitiesHelper();
          logger.debug(String.format("Verify if KVM instance: [%s] is available before Unmanaging VM.", vmName));
          try {
              final Connect conn = libvirtUtilitiesHelper.getConnectionByVmName(vmName);
              final Domain domain = libvirtComputingResource.getDomain(conn, vmName);
              if (domain == null) {
                  logger.error("Prepare Unmanage VMInstanceCommand: vm not found " + vmName);
                  new PrepareUnmanageVMInstanceAnswer(command, false, String.format("Cannot find VM with name [%s] in KVM host.", vmName));
              }
          } catch (Exception e){
              logger.error("PrepareUnmanagedInstancesCommand failed due to " + e.getMessage());
              return new PrepareUnmanageVMInstanceAnswer(command, false, "Error: " + e.getMessage());
          }
  
          return new PrepareUnmanageVMInstanceAnswer(command, true, "OK");
      }
  }
  