/**
* 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);
}