| /** |
| * 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.DataInput; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| /** |
| * JobID represents the immutable and unique identifier for |
| * the job. JobID consists of two parts. First part |
| * represents the jobtracker identifier, so that jobID to jobtracker map |
| * is defined. For cluster setup this string is the jobtracker |
| * start time, for local setting, it is "local". |
| * Second part of the JobID is the job number. <br> |
| * An example JobID is : |
| * <code>job_200707121733_0003</code> , which represents the third job |
| * running at the jobtracker started at <code>200707121733</code>. |
| * <p> |
| * Applications should never construct or parse JobID strings, but rather |
| * use appropriate constructors or {@link #forName(String)} method. |
| * |
| * @see TaskID |
| * @see TaskAttemptID |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public class JobID extends org.apache.hadoop.mapreduce.JobID { |
| /** |
| * Constructs a JobID object |
| * @param jtIdentifier jobTracker identifier |
| * @param id job number |
| */ |
| public JobID(String jtIdentifier, int id) { |
| super(jtIdentifier, id); |
| } |
| |
| public JobID() { } |
| |
| /** |
| * Downgrade a new JobID to an old one |
| * @param old a new or old JobID |
| * @return either old or a new JobID build to match old |
| */ |
| public static JobID downgrade(org.apache.hadoop.mapreduce.JobID old) { |
| if (old instanceof JobID) { |
| return (JobID) old; |
| } else { |
| return new JobID(old.getJtIdentifier(), old.getId()); |
| } |
| } |
| |
| @Deprecated |
| public static JobID read(DataInput in) throws IOException { |
| JobID jobId = new JobID(); |
| jobId.readFields(in); |
| return jobId; |
| } |
| |
| /** Construct a JobId object from given string |
| * @return constructed JobId object or null if the given String is null |
| * @throws IllegalArgumentException if the given string is malformed |
| */ |
| public static JobID forName(String str) throws IllegalArgumentException { |
| return (JobID) org.apache.hadoop.mapreduce.JobID.forName(str); |
| } |
| |
| /** |
| * Returns a regex pattern which matches task IDs. Arguments can |
| * be given null, in which case that part of the regex will be generic. |
| * For example to obtain a regex matching <i>any job</i> |
| * run on the jobtracker started at <i>200707121733</i>, we would use : |
| * <pre> |
| * JobID.getTaskIDsPattern("200707121733", null); |
| * </pre> |
| * which will return : |
| * <pre> "job_200707121733_[0-9]*" </pre> |
| * @param jtIdentifier jobTracker identifier, or null |
| * @param jobId job number, or null |
| * @return a regex pattern matching JobIDs |
| */ |
| @Deprecated |
| public static String getJobIDsPattern(String jtIdentifier, Integer jobId) { |
| StringBuilder builder = new StringBuilder(JOB).append(SEPARATOR); |
| builder.append(getJobIDsPatternWOPrefix(jtIdentifier, jobId)); |
| return builder.toString(); |
| } |
| |
| @Deprecated |
| static StringBuilder getJobIDsPatternWOPrefix(String jtIdentifier, |
| Integer jobId) { |
| StringBuilder builder = new StringBuilder(); |
| if (jtIdentifier != null) { |
| builder.append(jtIdentifier); |
| } else { |
| builder.append("[^").append(SEPARATOR).append("]*"); |
| } |
| builder.append(SEPARATOR) |
| .append(jobId != null ? idFormat.format(jobId) : "[0-9]*"); |
| return builder; |
| } |
| |
| } |