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 org.libvirt.Connect;
  import org.libvirt.Domain;
  import org.libvirt.DomainInfo.DomainState;
  import org.libvirt.LibvirtException;
  
  import com.cloud.agent.api.Answer;
  import com.cloud.agent.api.CreateVMSnapshotAnswer;
  import com.cloud.agent.api.CreateVMSnapshotCommand;
  import com.cloud.hypervisor.kvm.resource.LibvirtComputingResource;
  import com.cloud.resource.CommandWrapper;
  import com.cloud.resource.ResourceWrapper;
  
  @ResourceWrapper(handles =  CreateVMSnapshotCommand.class)
  public final class LibvirtCreateVMSnapshotCommandWrapper extends CommandWrapper<CreateVMSnapshotCommand, Answer, LibvirtComputingResource> {
  
  
      @Override
      public Answer execute(final CreateVMSnapshotCommand cmd, final LibvirtComputingResource libvirtComputingResource) {
          String vmName = cmd.getVmName();
          String vmSnapshotName = cmd.getTarget().getSnapshotName();
  
          Domain dm = null;
          try {
              final LibvirtUtilitiesHelper libvirtUtilitiesHelper = libvirtComputingResource.getLibvirtUtilitiesHelper();
              Connect conn = libvirtUtilitiesHelper.getConnection();
              dm = libvirtComputingResource.getDomain(conn, vmName);
  
              if (dm == null) {
                  return new CreateVMSnapshotAnswer(cmd, false,
                          "Create VM Snapshot Failed due to can not find vm: " + vmName);
              }
  
              DomainState domainState = dm.getInfo().state ;
              if (domainState != DomainState.VIR_DOMAIN_RUNNING) {
                  return new CreateVMSnapshotAnswer(cmd, false,
                          "Create VM Snapshot Failed due to  vm is not running: " + vmName + " with domainState = " + domainState);
              }
  
              String vmSnapshotXML = "<domainsnapshot>" + "  <name>" + vmSnapshotName + "</name>"
                      + "  <memory snapshot='internal' />" + "</domainsnapshot>";
  
              dm.snapshotCreateXML(vmSnapshotXML);
  
              return new CreateVMSnapshotAnswer(cmd, cmd.getTarget(), cmd.getVolumeTOs());
          } catch (LibvirtException e) {
              String msg = " Create VM snapshot failed due to " + e.toString();
              logger.warn(msg, e);
              return new CreateVMSnapshotAnswer(cmd, false, msg);
          } finally {
              if (dm != null) {
                  try {
                      dm.free();
                  } catch (LibvirtException l) {
                      logger.trace("Ignoring libvirt error.", l);
                  };
              }
          }
      }
  }
  