| /** |
| * 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.hadoop.mapred; |
| |
| import java.io.IOException; |
| |
| /** |
| * A listener for changes in a {@link JobInProgress job}'s lifecycle in the |
| * {@link JobTracker}. |
| */ |
| abstract class JobInProgressListener { |
| |
| /** |
| * Invoked when a new job has been added to the {@link JobTracker}. |
| * @param job The added job. |
| * @throws IOException |
| */ |
| public abstract void jobAdded(JobInProgress job) throws IOException; |
| |
| /** |
| * Invoked when a job has been removed from the {@link JobTracker}. |
| * @param job The removed job. |
| */ |
| public abstract void jobRemoved(JobInProgress job); |
| |
| /** |
| * Invoked when a job has been updated in the {@link JobTracker}. |
| * This change in the job is tracker using {@link JobChangeEvent}. |
| * @param event the event that tracks the change |
| */ |
| public abstract void jobUpdated(JobChangeEvent event); |
| } |