JobID.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.DataInput;
- import java.io.IOException;
- /**
- * 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
- */
- @Deprecated
- 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;
- }
- }