| /** |
| * 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); |
| } |
| } |