| /** |
| * 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.mapreduce.v2.api.records; |
| |
| import java.text.NumberFormat; |
| import org.apache.hadoop.yarn.api.records.ApplicationId; |
| |
| /** |
| * <p><code>JobId</code> represents the <em>globally unique</em> |
| * identifier for a MapReduce job.</p> |
| * |
| * <p>The globally unique nature of the identifier is achieved by using the |
| * <em>cluster timestamp</em> from the associated ApplicationId. i.e. |
| * start-time of the <code>ResourceManager</code> along with a monotonically |
| * increasing counter for the jobId.</p> |
| */ |
| public abstract class JobId implements Comparable<JobId> { |
| |
| /** |
| * Get the associated <em>ApplicationId</em> which represents the |
| * start time of the <code>ResourceManager</code> and is used to generate |
| * the globally unique <code>JobId</code>. |
| * @return associated <code>ApplicationId</code> |
| */ |
| public abstract ApplicationId getAppId(); |
| |
| /** |
| * Get the short integer identifier of the <code>JobId</code> |
| * which is unique for all applications started by a particular instance |
| * of the <code>ResourceManager</code>. |
| * @return short integer identifier of the <code>JobId</code> |
| */ |
| public abstract int getId(); |
| |
| public abstract void setAppId(ApplicationId appId); |
| public abstract void setId(int id); |
| |
| |
| protected static final String JOB = "job"; |
| protected static final char SEPARATOR = '_'; |
| static final ThreadLocal<NumberFormat> jobIdFormat = |
| new ThreadLocal<NumberFormat>() { |
| @Override |
| public NumberFormat initialValue() { |
| NumberFormat fmt = NumberFormat.getInstance(); |
| fmt.setGroupingUsed(false); |
| fmt.setMinimumIntegerDigits(4); |
| return fmt; |
| } |
| }; |
| |
| @Override |
| public String toString() { |
| StringBuilder builder = new StringBuilder(JOB); |
| builder.append(SEPARATOR); |
| builder.append(getAppId().getClusterTimestamp()); |
| builder.append(SEPARATOR); |
| builder.append(jobIdFormat.get().format(getId())); |
| return builder.toString(); |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + getAppId().hashCode(); |
| result = prime * result + getId(); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (getClass() != obj.getClass()) |
| return false; |
| JobId other = (JobId) obj; |
| if (!this.getAppId().equals(other.getAppId())) |
| return false; |
| if (this.getId() != other.getId()) |
| return false; |
| return true; |
| } |
| |
| @Override |
| public int compareTo(JobId other) { |
| int appIdComp = this.getAppId().compareTo(other.getAppId()); |
| if (appIdComp == 0) { |
| return this.getId() - other.getId(); |
| } else { |
| return appIdComp; |
| } |
| } |
| } |