/**
* 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.util.HashMap;
import java.util.Map;
import org.apache.hadoop.mapred.JobID;
import org.apache.hadoop.tools.rumen.JobStory;
/**
* A static ({@link JobID}, {@link JobStory}) mapping, used by {@link JobClient}
* and {@link JobTracker} for job submission.
*/
public class SimulatorJobCache {
private static Map<JobID, JobStory> submittedJobs = new HashMap<JobID, JobStory>();
/**
* Put ({@link JobID}, {@link JobStory}) into the mapping.
* @param jobId id of the job.
* @param job {@link JobStory} object of the job.
*/
public static void put(JobID jobId, JobStory job) {
submittedJobs.put(jobId, job);
}
/**
* Get the job identified by {@link JobID} and remove it from the mapping.
* @param jobId id of the job.
* @return {@link JobStory} object of the job.
*/
public static JobStory get(JobID jobId) {
return submittedJobs.remove(jobId);
}
/**
* Check the job at the head of queue, without removing it from the mapping.
* @param jobId id of the job.
* @return {@link JobStory} object of the job.
*/
public static JobStory peek(JobID jobId) {
return submittedJobs.get(jobId);
}
}