}
public Outcome<VMSnapshot> createVMSnapshotThroughJobQueue(final Long vmId, final Long vmSnapshotId, final boolean quiesceVm) {
final CallContext context = CallContext.current();
final User callingUser = context.getCallingUser();
final Account callingAccount = context.getCallingAccount();
final VMInstanceVO vm = _vmInstanceDao.findById(vmId);
Object[] result = Transaction.execute(new TransactionCallback<Object[]>() {
@Override
public Object[] doInTransaction(TransactionStatus status) {
VmWorkJobVO workJob = null;
_vmInstanceDao.lockRow(vm.getId(), true);
workJob = new VmWorkJobVO(context.getContextId());
workJob.setDispatcher(VmWorkConstants.VM_WORK_JOB_DISPATCHER);
workJob.setCmd(VmWorkCreateVMSnapshot.class.getName());
workJob.setAccountId(callingAccount.getId());
workJob.setUserId(callingUser.getId());
workJob.setStep(VmWorkJobVO.Step.Starting);
workJob.setVmType(VirtualMachine.Type.Instance);
workJob.setVmInstanceId(vm.getId());
workJob.setRelated(AsyncJobExecutionContext.getOriginJobContextId());
// save work context info (there are some duplications)
VmWorkCreateVMSnapshot workInfo = new VmWorkCreateVMSnapshot(callingUser.getId(), callingAccount.getId(), vm.getId(),
VMSnapshotManagerImpl.VM_WORK_JOB_HANDLER, vmSnapshotId, quiesceVm);
workJob.setCmdInfo(VmWorkSerializer.serialize(workInfo));
_jobMgr.submitAsyncJob(workJob, VmWorkConstants.VM_WORK_QUEUE, vm.getId());