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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.mapreduce;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.lang.reflect.Constructor;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.lang.reflect.InvocationTargetException;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.lang.reflect.Method;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.mapred.JobConf;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.mapred.MiniMRCluster;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.mapreduce.Job;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.mapreduce.JobContext;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.mapreduce.JobID;</span> |
| <span class="source-line-no">030</span><span id="line-30"></span> |
| <span class="source-line-no">031</span><span id="line-31">/**</span> |
| <span class="source-line-no">032</span><span id="line-32"> * This class provides shims for HBase to interact with the Hadoop 1.0.x and the Hadoop 0.23.x</span> |
| <span class="source-line-no">033</span><span id="line-33"> * series. NOTE: No testing done against 0.22.x, or 0.21.x.</span> |
| <span class="source-line-no">034</span><span id="line-34"> */</span> |
| <span class="source-line-no">035</span><span id="line-35">abstract public class MapreduceTestingShim {</span> |
| <span class="source-line-no">036</span><span id="line-36"> private static MapreduceTestingShim instance;</span> |
| <span class="source-line-no">037</span><span id="line-37"> private static Class[] emptyParam = new Class[] {};</span> |
| <span class="source-line-no">038</span><span id="line-38"></span> |
| <span class="source-line-no">039</span><span id="line-39"> static {</span> |
| <span class="source-line-no">040</span><span id="line-40"> try {</span> |
| <span class="source-line-no">041</span><span id="line-41"> // This class exists in hadoop 0.22+ but not in Hadoop 20.x/1.x</span> |
| <span class="source-line-no">042</span><span id="line-42"> Class c = Class.forName("org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl");</span> |
| <span class="source-line-no">043</span><span id="line-43"> instance = new MapreduceV2Shim();</span> |
| <span class="source-line-no">044</span><span id="line-44"> } catch (Exception e) {</span> |
| <span class="source-line-no">045</span><span id="line-45"> instance = new MapreduceV1Shim();</span> |
| <span class="source-line-no">046</span><span id="line-46"> }</span> |
| <span class="source-line-no">047</span><span id="line-47"> }</span> |
| <span class="source-line-no">048</span><span id="line-48"></span> |
| <span class="source-line-no">049</span><span id="line-49"> abstract public JobContext newJobContext(Configuration jobConf) throws IOException;</span> |
| <span class="source-line-no">050</span><span id="line-50"></span> |
| <span class="source-line-no">051</span><span id="line-51"> abstract public Job newJob(Configuration conf) throws IOException;</span> |
| <span class="source-line-no">052</span><span id="line-52"></span> |
| <span class="source-line-no">053</span><span id="line-53"> abstract public JobConf obtainJobConf(MiniMRCluster cluster);</span> |
| <span class="source-line-no">054</span><span id="line-54"></span> |
| <span class="source-line-no">055</span><span id="line-55"> abstract public String obtainMROutputDirProp();</span> |
| <span class="source-line-no">056</span><span id="line-56"></span> |
| <span class="source-line-no">057</span><span id="line-57"> public static JobContext createJobContext(Configuration jobConf) throws IOException {</span> |
| <span class="source-line-no">058</span><span id="line-58"> return instance.newJobContext(jobConf);</span> |
| <span class="source-line-no">059</span><span id="line-59"> }</span> |
| <span class="source-line-no">060</span><span id="line-60"></span> |
| <span class="source-line-no">061</span><span id="line-61"> public static JobConf getJobConf(MiniMRCluster cluster) {</span> |
| <span class="source-line-no">062</span><span id="line-62"> return instance.obtainJobConf(cluster);</span> |
| <span class="source-line-no">063</span><span id="line-63"> }</span> |
| <span class="source-line-no">064</span><span id="line-64"></span> |
| <span class="source-line-no">065</span><span id="line-65"> public static Job createJob(Configuration conf) throws IOException {</span> |
| <span class="source-line-no">066</span><span id="line-66"> return instance.newJob(conf);</span> |
| <span class="source-line-no">067</span><span id="line-67"> }</span> |
| <span class="source-line-no">068</span><span id="line-68"></span> |
| <span class="source-line-no">069</span><span id="line-69"> public static String getMROutputDirProp() {</span> |
| <span class="source-line-no">070</span><span id="line-70"> return instance.obtainMROutputDirProp();</span> |
| <span class="source-line-no">071</span><span id="line-71"> }</span> |
| <span class="source-line-no">072</span><span id="line-72"></span> |
| <span class="source-line-no">073</span><span id="line-73"> private static class MapreduceV1Shim extends MapreduceTestingShim {</span> |
| <span class="source-line-no">074</span><span id="line-74"> @Override</span> |
| <span class="source-line-no">075</span><span id="line-75"> public JobContext newJobContext(Configuration jobConf) throws IOException {</span> |
| <span class="source-line-no">076</span><span id="line-76"> // Implementing:</span> |
| <span class="source-line-no">077</span><span id="line-77"> // return new JobContext(jobConf, new JobID());</span> |
| <span class="source-line-no">078</span><span id="line-78"> JobID jobId = new JobID();</span> |
| <span class="source-line-no">079</span><span id="line-79"> Constructor<JobContext> c;</span> |
| <span class="source-line-no">080</span><span id="line-80"> try {</span> |
| <span class="source-line-no">081</span><span id="line-81"> c = JobContext.class.getConstructor(Configuration.class, JobID.class);</span> |
| <span class="source-line-no">082</span><span id="line-82"> return c.newInstance(jobConf, jobId);</span> |
| <span class="source-line-no">083</span><span id="line-83"> } catch (Exception e) {</span> |
| <span class="source-line-no">084</span><span id="line-84"> throw new IllegalStateException(</span> |
| <span class="source-line-no">085</span><span id="line-85"> "Failed to instantiate new JobContext(jobConf, new JobID())", e);</span> |
| <span class="source-line-no">086</span><span id="line-86"> }</span> |
| <span class="source-line-no">087</span><span id="line-87"> }</span> |
| <span class="source-line-no">088</span><span id="line-88"></span> |
| <span class="source-line-no">089</span><span id="line-89"> @Override</span> |
| <span class="source-line-no">090</span><span id="line-90"> public Job newJob(Configuration conf) throws IOException {</span> |
| <span class="source-line-no">091</span><span id="line-91"> // Implementing:</span> |
| <span class="source-line-no">092</span><span id="line-92"> // return new Job(conf);</span> |
| <span class="source-line-no">093</span><span id="line-93"> Constructor<Job> c;</span> |
| <span class="source-line-no">094</span><span id="line-94"> try {</span> |
| <span class="source-line-no">095</span><span id="line-95"> c = Job.class.getConstructor(Configuration.class);</span> |
| <span class="source-line-no">096</span><span id="line-96"> return c.newInstance(conf);</span> |
| <span class="source-line-no">097</span><span id="line-97"> } catch (Exception e) {</span> |
| <span class="source-line-no">098</span><span id="line-98"> throw new IllegalStateException("Failed to instantiate new Job(conf)", e);</span> |
| <span class="source-line-no">099</span><span id="line-99"> }</span> |
| <span class="source-line-no">100</span><span id="line-100"> }</span> |
| <span class="source-line-no">101</span><span id="line-101"></span> |
| <span class="source-line-no">102</span><span id="line-102"> @Override</span> |
| <span class="source-line-no">103</span><span id="line-103"> public JobConf obtainJobConf(MiniMRCluster cluster) {</span> |
| <span class="source-line-no">104</span><span id="line-104"> if (cluster == null) return null;</span> |
| <span class="source-line-no">105</span><span id="line-105"> try {</span> |
| <span class="source-line-no">106</span><span id="line-106"> Object runner = cluster.getJobTrackerRunner();</span> |
| <span class="source-line-no">107</span><span id="line-107"> Method meth = runner.getClass().getDeclaredMethod("getJobTracker", emptyParam);</span> |
| <span class="source-line-no">108</span><span id="line-108"> Object tracker = meth.invoke(runner, new Object[] {});</span> |
| <span class="source-line-no">109</span><span id="line-109"> Method m = tracker.getClass().getDeclaredMethod("getConf", emptyParam);</span> |
| <span class="source-line-no">110</span><span id="line-110"> return (JobConf) m.invoke(tracker, new Object[] {});</span> |
| <span class="source-line-no">111</span><span id="line-111"> } catch (NoSuchMethodException nsme) {</span> |
| <span class="source-line-no">112</span><span id="line-112"> return null;</span> |
| <span class="source-line-no">113</span><span id="line-113"> } catch (InvocationTargetException ite) {</span> |
| <span class="source-line-no">114</span><span id="line-114"> return null;</span> |
| <span class="source-line-no">115</span><span id="line-115"> } catch (IllegalAccessException iae) {</span> |
| <span class="source-line-no">116</span><span id="line-116"> return null;</span> |
| <span class="source-line-no">117</span><span id="line-117"> }</span> |
| <span class="source-line-no">118</span><span id="line-118"> }</span> |
| <span class="source-line-no">119</span><span id="line-119"></span> |
| <span class="source-line-no">120</span><span id="line-120"> @Override</span> |
| <span class="source-line-no">121</span><span id="line-121"> public String obtainMROutputDirProp() {</span> |
| <span class="source-line-no">122</span><span id="line-122"> return "mapred.output.dir";</span> |
| <span class="source-line-no">123</span><span id="line-123"> }</span> |
| <span class="source-line-no">124</span><span id="line-124"> }</span> |
| <span class="source-line-no">125</span><span id="line-125"></span> |
| <span class="source-line-no">126</span><span id="line-126"> private static class MapreduceV2Shim extends MapreduceTestingShim {</span> |
| <span class="source-line-no">127</span><span id="line-127"> @Override</span> |
| <span class="source-line-no">128</span><span id="line-128"> public JobContext newJobContext(Configuration jobConf) {</span> |
| <span class="source-line-no">129</span><span id="line-129"> return newJob(jobConf);</span> |
| <span class="source-line-no">130</span><span id="line-130"> }</span> |
| <span class="source-line-no">131</span><span id="line-131"></span> |
| <span class="source-line-no">132</span><span id="line-132"> @Override</span> |
| <span class="source-line-no">133</span><span id="line-133"> public Job newJob(Configuration jobConf) {</span> |
| <span class="source-line-no">134</span><span id="line-134"> // Implementing:</span> |
| <span class="source-line-no">135</span><span id="line-135"> // return Job.getInstance(jobConf);</span> |
| <span class="source-line-no">136</span><span id="line-136"> try {</span> |
| <span class="source-line-no">137</span><span id="line-137"> Method m = Job.class.getMethod("getInstance", Configuration.class);</span> |
| <span class="source-line-no">138</span><span id="line-138"> return (Job) m.invoke(null, jobConf); // static method, then arg</span> |
| <span class="source-line-no">139</span><span id="line-139"> } catch (Exception e) {</span> |
| <span class="source-line-no">140</span><span id="line-140"> e.printStackTrace();</span> |
| <span class="source-line-no">141</span><span id="line-141"> throw new IllegalStateException("Failed to return from Job.getInstance(jobConf)");</span> |
| <span class="source-line-no">142</span><span id="line-142"> }</span> |
| <span class="source-line-no">143</span><span id="line-143"> }</span> |
| <span class="source-line-no">144</span><span id="line-144"></span> |
| <span class="source-line-no">145</span><span id="line-145"> @Override</span> |
| <span class="source-line-no">146</span><span id="line-146"> public JobConf obtainJobConf(MiniMRCluster cluster) {</span> |
| <span class="source-line-no">147</span><span id="line-147"> try {</span> |
| <span class="source-line-no">148</span><span id="line-148"> Method meth = MiniMRCluster.class.getMethod("getJobTrackerConf", emptyParam);</span> |
| <span class="source-line-no">149</span><span id="line-149"> return (JobConf) meth.invoke(cluster, new Object[] {});</span> |
| <span class="source-line-no">150</span><span id="line-150"> } catch (NoSuchMethodException nsme) {</span> |
| <span class="source-line-no">151</span><span id="line-151"> return null;</span> |
| <span class="source-line-no">152</span><span id="line-152"> } catch (InvocationTargetException ite) {</span> |
| <span class="source-line-no">153</span><span id="line-153"> return null;</span> |
| <span class="source-line-no">154</span><span id="line-154"> } catch (IllegalAccessException iae) {</span> |
| <span class="source-line-no">155</span><span id="line-155"> return null;</span> |
| <span class="source-line-no">156</span><span id="line-156"> }</span> |
| <span class="source-line-no">157</span><span id="line-157"> }</span> |
| <span class="source-line-no">158</span><span id="line-158"></span> |
| <span class="source-line-no">159</span><span id="line-159"> @Override</span> |
| <span class="source-line-no">160</span><span id="line-160"> public String obtainMROutputDirProp() {</span> |
| <span class="source-line-no">161</span><span id="line-161"> // This is a copy of o.a.h.mapreduce.lib.output.FileOutputFormat.OUTDIR</span> |
| <span class="source-line-no">162</span><span id="line-162"> // from Hadoop 0.23.x. If we use the source directly we break the hadoop 1.x compile.</span> |
| <span class="source-line-no">163</span><span id="line-163"> return "mapreduce.output.fileoutputformat.outputdir";</span> |
| <span class="source-line-no">164</span><span id="line-164"> }</span> |
| <span class="source-line-no">165</span><span id="line-165"> }</span> |
| <span class="source-line-no">166</span><span id="line-166">}</span> |
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