JobInProgressListener.java
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上传日期:2018-01-08
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- /**
- * 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);
- }