| /** |
| * 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 org.apache.oozie.command; |
| |
| import org.apache.oozie.ErrorCode; |
| import org.apache.oozie.client.Job; |
| |
| /** |
| * Transition command for pause the job. The derived class has to override these following functions: |
| * <p> |
| * updateJob() : update job status and attributes |
| * pauseChildren() : submit or queue commands to pause children |
| * notifyParent() : update the status to upstream if any |
| */ |
| public abstract class PauseTransitionXCommand extends TransitionXCommand<Void> { |
| /** |
| * The constructor for abstract class {@link PauseTransitionXCommand} |
| * |
| * @param name the command name |
| * @param type the command type |
| * @param priority the command priority |
| */ |
| public PauseTransitionXCommand(String name, String type, int priority) { |
| super(name, type, priority); |
| } |
| |
| /** |
| * pause actions associated with the job |
| * |
| * @throws CommandException thrown if failed to pause actions |
| */ |
| public abstract void pauseChildren() throws CommandException; |
| |
| @Override |
| public final void transitToNext() throws CommandException { |
| if (job == null) { |
| job = this.getJob(); |
| } |
| |
| if (job.getStatus() == Job.Status.RUNNING) { |
| job.setStatus(Job.Status.PAUSED); |
| } |
| else if (job.getStatus() == Job.Status.RUNNINGWITHERROR) { |
| job.setStatus(Job.Status.PAUSEDWITHERROR); |
| } |
| else if (job.getStatus() == Job.Status.PREP) { |
| job.setStatus(Job.Status.PREPPAUSED); |
| } |
| else { |
| throw new CommandException(ErrorCode.E1315, job.getId()); |
| } |
| |
| //TODO: to be revisited; |
| //job.setPending(); |
| } |
| |
| @Override |
| protected Void execute() throws CommandException { |
| try { |
| transitToNext(); |
| updateJob(); |
| pauseChildren(); |
| } |
| finally { |
| notifyParent(); |
| } |
| return null; |
| } |
| } |