| /** |
| * 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.DataOutput; |
| import java.io.IOException; |
| import java.text.NumberFormat; |
| |
| class JVMId extends ID { |
| boolean isMap; |
| JobID jobId; |
| private static final String JVM = "jvm"; |
| private static NumberFormat idFormat = NumberFormat.getInstance(); |
| static { |
| idFormat.setGroupingUsed(false); |
| idFormat.setMinimumIntegerDigits(6); |
| } |
| |
| public JVMId(JobID jobId, boolean isMap, int id) { |
| super(id); |
| this.isMap = isMap; |
| this.jobId = jobId; |
| } |
| |
| public JVMId (String jtIdentifier, int jobId, boolean isMap, int id) { |
| this(new JobID(jtIdentifier, jobId), isMap, id); |
| } |
| |
| public JVMId() { |
| jobId = new JobID(); |
| } |
| |
| public boolean isMapJVM() { |
| return isMap; |
| } |
| public JobID getJobId() { |
| return jobId; |
| } |
| public boolean equals(Object o) { |
| if(o == null) |
| return false; |
| if(o.getClass().equals(this.getClass())) { |
| JVMId that = (JVMId)o; |
| return this.id==that.id |
| && this.isMap == that.isMap |
| && this.jobId.equals(that.jobId); |
| } |
| else return false; |
| } |
| |
| /**Compare TaskInProgressIds by first jobIds, then by tip numbers. Reduces are |
| * defined as greater then maps.*/ |
| @Override |
| public int compareTo(org.apache.hadoop.mapreduce.ID o) { |
| JVMId that = (JVMId)o; |
| int jobComp = this.jobId.compareTo(that.jobId); |
| if(jobComp == 0) { |
| if(this.isMap == that.isMap) { |
| return this.id - that.id; |
| } else { |
| return this.isMap ? -1 : 1; |
| } |
| } else { |
| return jobComp; |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return appendTo(new StringBuilder(JVM)).toString(); |
| } |
| |
| /** |
| * Add the unique id to the given StringBuilder. |
| * @param builder the builder to append to |
| * @return the passed in builder. |
| */ |
| protected StringBuilder appendTo(StringBuilder builder) { |
| return jobId.appendTo(builder). |
| append(SEPARATOR). |
| append(isMap ? 'm' : 'r'). |
| append(SEPARATOR). |
| append(idFormat.format(id)); |
| } |
| |
| @Override |
| public int hashCode() { |
| return jobId.hashCode() * 11 + id; |
| } |
| |
| @Override |
| public void readFields(DataInput in) throws IOException { |
| super.readFields(in); |
| this.jobId.readFields(in); |
| this.isMap = in.readBoolean(); |
| } |
| |
| @Override |
| public void write(DataOutput out) throws IOException { |
| super.write(out); |
| jobId.write(out); |
| out.writeBoolean(isMap); |
| } |
| |
| /** Construct a JVMId object from given string |
| * @return constructed JVMId object or null if the given String is null |
| * @throws IllegalArgumentException if the given string is malformed |
| */ |
| public static JVMId forName(String str) |
| throws IllegalArgumentException { |
| if(str == null) |
| return null; |
| try { |
| String[] parts = str.split("_"); |
| if(parts.length == 5) { |
| if(parts[0].equals(JVM)) { |
| boolean isMap = false; |
| if(parts[3].equals("m")) isMap = true; |
| else if(parts[3].equals("r")) isMap = false; |
| else throw new Exception(); |
| return new JVMId(parts[1], Integer.parseInt(parts[2]), |
| isMap, Integer.parseInt(parts[4])); |
| } |
| } |
| }catch (Exception ex) {//fall below |
| } |
| throw new IllegalArgumentException("TaskId string : " + str |
| + " is not properly formed"); |
| } |
| |
| } |