import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppMoveEvent; //导入依赖的package包/类
@Override
public synchronized void moveAllApps(String sourceQueue, String destQueue)
    throws YarnException {
  // check if destination queue is a valid leaf queue
  try {
    getQueueInfo(destQueue, false, false);
  } catch (IOException e) {
    LOG.warn(e);
    throw new YarnException(e);
  }
  // check if source queue is a valid
  List<ApplicationAttemptId> apps = getAppsInQueue(sourceQueue);
  if (apps == null) {
    String errMsg = "The specified Queue: " + sourceQueue + " doesn't exist";
    LOG.warn(errMsg);
    throw new YarnException(errMsg);
  }
  // generate move events for each pending/running app
  for (ApplicationAttemptId app : apps) {
    SettableFuture<Object> future = SettableFuture.create();
    this.rmContext
        .getDispatcher()
        .getEventHandler()
        .handle(new RMAppMoveEvent(app.getApplicationId(), destQueue, future));
  }
}
 

import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppMoveEvent; //导入依赖的package包/类
@SuppressWarnings("unchecked")
@Override
public MoveApplicationAcrossQueuesResponse moveApplicationAcrossQueues(
    MoveApplicationAcrossQueuesRequest request) throws YarnException {
  ApplicationId applicationId = request.getApplicationId();

  UserGroupInformation callerUGI;
  try {
    callerUGI = UserGroupInformation.getCurrentUser();
  } catch (IOException ie) {
    LOG.info("Error getting UGI ", ie);
    RMAuditLogger.logFailure("UNKNOWN", AuditConstants.MOVE_APP_REQUEST,
        "UNKNOWN", "ClientRMService" , "Error getting UGI",
        applicationId);
    throw RPCUtil.getRemoteException(ie);
  }

  RMApp application = this.rmContext.getRMApps().get(applicationId);
  if (application == null) {
    RMAuditLogger.logFailure(callerUGI.getUserName(),
        AuditConstants.MOVE_APP_REQUEST, "UNKNOWN", "ClientRMService",
        "Trying to move an absent application", applicationId);
    throw new ApplicationNotFoundException("Trying to move an absent"
        + " application " + applicationId);
  }

  if (!checkAccess(callerUGI, application.getUser(),
      ApplicationAccessType.MODIFY_APP, application)) {
    RMAuditLogger.logFailure(callerUGI.getShortUserName(),
        AuditConstants.MOVE_APP_REQUEST,
        "User doesn't have permissions to "
            + ApplicationAccessType.MODIFY_APP.toString(), "ClientRMService",
        AuditConstants.UNAUTHORIZED_USER, applicationId);
    throw RPCUtil.getRemoteException(new AccessControlException("User "
        + callerUGI.getShortUserName() + " cannot perform operation "
        + ApplicationAccessType.MODIFY_APP.name() + " on " + applicationId));
  }
  
  // Moves only allowed when app is in a state that means it is tracked by
  // the scheduler
  if (EnumSet.of(RMAppState.NEW, RMAppState.NEW_SAVING, RMAppState.FAILED,
      RMAppState.FINAL_SAVING, RMAppState.FINISHING, RMAppState.FINISHED,
      RMAppState.KILLED, RMAppState.KILLING, RMAppState.FAILED)
      .contains(application.getState())) {
    String msg = "App in " + application.getState() + " state cannot be moved.";
    RMAuditLogger.logFailure(callerUGI.getShortUserName(),
        AuditConstants.MOVE_APP_REQUEST, "UNKNOWN", "ClientRMService", msg);
    throw new YarnException(msg);
  }

  SettableFuture<Object> future = SettableFuture.create();
  this.rmContext.getDispatcher().getEventHandler().handle(
      new RMAppMoveEvent(applicationId, request.getTargetQueue(), future));
  
  try {
    Futures.get(future, YarnException.class);
  } catch (YarnException ex) {
    RMAuditLogger.logFailure(callerUGI.getShortUserName(),
        AuditConstants.MOVE_APP_REQUEST, "UNKNOWN", "ClientRMService",
        ex.getMessage());
    throw ex;
  }

  RMAuditLogger.logSuccess(callerUGI.getShortUserName(), 
      AuditConstants.MOVE_APP_REQUEST, "ClientRMService" , applicationId);
  MoveApplicationAcrossQueuesResponse response = recordFactory
      .newRecordInstance(MoveApplicationAcrossQueuesResponse.class);
  return response;
}