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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.Method;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.concurrent.ExecutorService;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.concurrent.Executors;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.client.Result;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.io.ImmutableBytesWritable;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.mapreduce.Counter;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.mapreduce.InputSplit;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.mapreduce.Job;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.mapreduce.JobContext;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.mapreduce.MapContext;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.mapreduce.Mapper;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.mapreduce.OutputCommitter;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.mapreduce.RecordReader;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.mapreduce.RecordWriter;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.mapreduce.StatusReporter;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.mapreduce.TaskAttemptContext;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.mapreduce.TaskAttemptID;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.util.ReflectionUtils;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.slf4j.Logger;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">044</span><span id="line-44"></span> |
| <span class="source-line-no">045</span><span id="line-45">/**</span> |
| <span class="source-line-no">046</span><span id="line-46"> * Multithreaded implementation for @link org.apache.hbase.mapreduce.TableMapper</span> |
| <span class="source-line-no">047</span><span id="line-47"> * <p></span> |
| <span class="source-line-no">048</span><span id="line-48"> * It can be used instead when the Map operation is not CPU bound in order to improve throughput.</span> |
| <span class="source-line-no">049</span><span id="line-49"> * <p></span> |
| <span class="source-line-no">050</span><span id="line-50"> * Mapper implementations using this MapRunnable must be thread-safe.</span> |
| <span class="source-line-no">051</span><span id="line-51"> * <p></span> |
| <span class="source-line-no">052</span><span id="line-52"> * The Map-Reduce job has to be configured with the mapper to use via {@link #setMapperClass} and</span> |
| <span class="source-line-no">053</span><span id="line-53"> * the number of thread the thread-pool can use with the {@link #getNumberOfThreads} method. The</span> |
| <span class="source-line-no">054</span><span id="line-54"> * default value is 10 threads.</span> |
| <span class="source-line-no">055</span><span id="line-55"> * <p></span> |
| <span class="source-line-no">056</span><span id="line-56"> */</span> |
| <span class="source-line-no">057</span><span id="line-57"></span> |
| <span class="source-line-no">058</span><span id="line-58">@InterfaceAudience.Private</span> |
| <span class="source-line-no">059</span><span id="line-59">public class MultithreadedTableMapper<K2, V2> extends TableMapper<K2, V2> {</span> |
| <span class="source-line-no">060</span><span id="line-60"> private static final Logger LOG = LoggerFactory.getLogger(MultithreadedTableMapper.class);</span> |
| <span class="source-line-no">061</span><span id="line-61"> private Class<? extends Mapper<ImmutableBytesWritable, Result, K2, V2>> mapClass;</span> |
| <span class="source-line-no">062</span><span id="line-62"> private Context outer;</span> |
| <span class="source-line-no">063</span><span id="line-63"> private ExecutorService executor;</span> |
| <span class="source-line-no">064</span><span id="line-64"> public static final String NUMBER_OF_THREADS = "hbase.mapreduce.multithreadedmapper.threads";</span> |
| <span class="source-line-no">065</span><span id="line-65"> public static final String MAPPER_CLASS = "hbase.mapreduce.multithreadedmapper.mapclass";</span> |
| <span class="source-line-no">066</span><span id="line-66"></span> |
| <span class="source-line-no">067</span><span id="line-67"> /**</span> |
| <span class="source-line-no">068</span><span id="line-68"> * The number of threads in the thread pool that will run the map function.</span> |
| <span class="source-line-no">069</span><span id="line-69"> * @param job the job</span> |
| <span class="source-line-no">070</span><span id="line-70"> * @return the number of threads</span> |
| <span class="source-line-no">071</span><span id="line-71"> */</span> |
| <span class="source-line-no">072</span><span id="line-72"> public static int getNumberOfThreads(JobContext job) {</span> |
| <span class="source-line-no">073</span><span id="line-73"> return job.getConfiguration().getInt(NUMBER_OF_THREADS, 10);</span> |
| <span class="source-line-no">074</span><span id="line-74"> }</span> |
| <span class="source-line-no">075</span><span id="line-75"></span> |
| <span class="source-line-no">076</span><span id="line-76"> /**</span> |
| <span class="source-line-no">077</span><span id="line-77"> * Set the number of threads in the pool for running maps.</span> |
| <span class="source-line-no">078</span><span id="line-78"> * @param job the job to modify</span> |
| <span class="source-line-no">079</span><span id="line-79"> * @param threads the new number of threads</span> |
| <span class="source-line-no">080</span><span id="line-80"> */</span> |
| <span class="source-line-no">081</span><span id="line-81"> public static void setNumberOfThreads(Job job, int threads) {</span> |
| <span class="source-line-no">082</span><span id="line-82"> job.getConfiguration().setInt(NUMBER_OF_THREADS, threads);</span> |
| <span class="source-line-no">083</span><span id="line-83"> }</span> |
| <span class="source-line-no">084</span><span id="line-84"></span> |
| <span class="source-line-no">085</span><span id="line-85"> /**</span> |
| <span class="source-line-no">086</span><span id="line-86"> * Get the application's mapper class.</span> |
| <span class="source-line-no">087</span><span id="line-87"> * @param <K2> the map's output key type</span> |
| <span class="source-line-no">088</span><span id="line-88"> * @param <V2> the map's output value type</span> |
| <span class="source-line-no">089</span><span id="line-89"> * @param job the job</span> |
| <span class="source-line-no">090</span><span id="line-90"> * @return the mapper class to run</span> |
| <span class="source-line-no">091</span><span id="line-91"> */</span> |
| <span class="source-line-no">092</span><span id="line-92"> @SuppressWarnings("unchecked")</span> |
| <span class="source-line-no">093</span><span id="line-93"> public static <K2, V2> Class<Mapper<ImmutableBytesWritable, Result, K2, V2>></span> |
| <span class="source-line-no">094</span><span id="line-94"> getMapperClass(JobContext job) {</span> |
| <span class="source-line-no">095</span><span id="line-95"> return (Class<Mapper<ImmutableBytesWritable, Result, K2, V2>>) job.getConfiguration()</span> |
| <span class="source-line-no">096</span><span id="line-96"> .getClass(MAPPER_CLASS, Mapper.class);</span> |
| <span class="source-line-no">097</span><span id="line-97"> }</span> |
| <span class="source-line-no">098</span><span id="line-98"></span> |
| <span class="source-line-no">099</span><span id="line-99"> /**</span> |
| <span class="source-line-no">100</span><span id="line-100"> * Set the application's mapper class.</span> |
| <span class="source-line-no">101</span><span id="line-101"> * @param <K2> the map output key type</span> |
| <span class="source-line-no">102</span><span id="line-102"> * @param <V2> the map output value type</span> |
| <span class="source-line-no">103</span><span id="line-103"> * @param job the job to modify</span> |
| <span class="source-line-no">104</span><span id="line-104"> * @param cls the class to use as the mapper</span> |
| <span class="source-line-no">105</span><span id="line-105"> */</span> |
| <span class="source-line-no">106</span><span id="line-106"> public static <K2, V2> void setMapperClass(Job job,</span> |
| <span class="source-line-no">107</span><span id="line-107"> Class<? extends Mapper<ImmutableBytesWritable, Result, K2, V2>> cls) {</span> |
| <span class="source-line-no">108</span><span id="line-108"> if (MultithreadedTableMapper.class.isAssignableFrom(cls)) {</span> |
| <span class="source-line-no">109</span><span id="line-109"> throw new IllegalArgumentException(</span> |
| <span class="source-line-no">110</span><span id="line-110"> "Can't have recursive " + "MultithreadedTableMapper instances.");</span> |
| <span class="source-line-no">111</span><span id="line-111"> }</span> |
| <span class="source-line-no">112</span><span id="line-112"> job.getConfiguration().setClass(MAPPER_CLASS, cls, Mapper.class);</span> |
| <span class="source-line-no">113</span><span id="line-113"> }</span> |
| <span class="source-line-no">114</span><span id="line-114"></span> |
| <span class="source-line-no">115</span><span id="line-115"> /**</span> |
| <span class="source-line-no">116</span><span id="line-116"> * Run the application's maps using a thread pool.</span> |
| <span class="source-line-no">117</span><span id="line-117"> */</span> |
| <span class="source-line-no">118</span><span id="line-118"> @Override</span> |
| <span class="source-line-no">119</span><span id="line-119"> public void run(Context context) throws IOException, InterruptedException {</span> |
| <span class="source-line-no">120</span><span id="line-120"> outer = context;</span> |
| <span class="source-line-no">121</span><span id="line-121"> int numberOfThreads = getNumberOfThreads(context);</span> |
| <span class="source-line-no">122</span><span id="line-122"> mapClass = getMapperClass(context);</span> |
| <span class="source-line-no">123</span><span id="line-123"> if (LOG.isDebugEnabled()) {</span> |
| <span class="source-line-no">124</span><span id="line-124"> LOG.debug("Configuring multithread runner to use " + numberOfThreads + " threads");</span> |
| <span class="source-line-no">125</span><span id="line-125"> }</span> |
| <span class="source-line-no">126</span><span id="line-126"> executor = Executors.newFixedThreadPool(numberOfThreads);</span> |
| <span class="source-line-no">127</span><span id="line-127"> for (int i = 0; i < numberOfThreads; ++i) {</span> |
| <span class="source-line-no">128</span><span id="line-128"> MapRunner thread = new MapRunner(context);</span> |
| <span class="source-line-no">129</span><span id="line-129"> executor.execute(thread);</span> |
| <span class="source-line-no">130</span><span id="line-130"> }</span> |
| <span class="source-line-no">131</span><span id="line-131"> executor.shutdown();</span> |
| <span class="source-line-no">132</span><span id="line-132"> while (!executor.isTerminated()) {</span> |
| <span class="source-line-no">133</span><span id="line-133"> // wait till all the threads are done</span> |
| <span class="source-line-no">134</span><span id="line-134"> Thread.sleep(1000);</span> |
| <span class="source-line-no">135</span><span id="line-135"> }</span> |
| <span class="source-line-no">136</span><span id="line-136"> }</span> |
| <span class="source-line-no">137</span><span id="line-137"></span> |
| <span class="source-line-no">138</span><span id="line-138"> private class SubMapRecordReader extends RecordReader<ImmutableBytesWritable, Result> {</span> |
| <span class="source-line-no">139</span><span id="line-139"> private ImmutableBytesWritable key;</span> |
| <span class="source-line-no">140</span><span id="line-140"> private Result value;</span> |
| <span class="source-line-no">141</span><span id="line-141"> private Configuration conf;</span> |
| <span class="source-line-no">142</span><span id="line-142"></span> |
| <span class="source-line-no">143</span><span id="line-143"> @Override</span> |
| <span class="source-line-no">144</span><span id="line-144"> public void close() throws IOException {</span> |
| <span class="source-line-no">145</span><span id="line-145"> }</span> |
| <span class="source-line-no">146</span><span id="line-146"></span> |
| <span class="source-line-no">147</span><span id="line-147"> @Override</span> |
| <span class="source-line-no">148</span><span id="line-148"> public float getProgress() throws IOException, InterruptedException {</span> |
| <span class="source-line-no">149</span><span id="line-149"> return 0;</span> |
| <span class="source-line-no">150</span><span id="line-150"> }</span> |
| <span class="source-line-no">151</span><span id="line-151"></span> |
| <span class="source-line-no">152</span><span id="line-152"> @Override</span> |
| <span class="source-line-no">153</span><span id="line-153"> public void initialize(InputSplit split, TaskAttemptContext context)</span> |
| <span class="source-line-no">154</span><span id="line-154"> throws IOException, InterruptedException {</span> |
| <span class="source-line-no">155</span><span id="line-155"> conf = context.getConfiguration();</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"> @Override</span> |
| <span class="source-line-no">159</span><span id="line-159"> public boolean nextKeyValue() throws IOException, InterruptedException {</span> |
| <span class="source-line-no">160</span><span id="line-160"> synchronized (outer) {</span> |
| <span class="source-line-no">161</span><span id="line-161"> if (!outer.nextKeyValue()) {</span> |
| <span class="source-line-no">162</span><span id="line-162"> return false;</span> |
| <span class="source-line-no">163</span><span id="line-163"> }</span> |
| <span class="source-line-no">164</span><span id="line-164"> key = ReflectionUtils.copy(outer.getConfiguration(), outer.getCurrentKey(), key);</span> |
| <span class="source-line-no">165</span><span id="line-165"> value = ReflectionUtils.copy(conf, outer.getCurrentValue(), value);</span> |
| <span class="source-line-no">166</span><span id="line-166"> return true;</span> |
| <span class="source-line-no">167</span><span id="line-167"> }</span> |
| <span class="source-line-no">168</span><span id="line-168"> }</span> |
| <span class="source-line-no">169</span><span id="line-169"></span> |
| <span class="source-line-no">170</span><span id="line-170"> public ImmutableBytesWritable getCurrentKey() {</span> |
| <span class="source-line-no">171</span><span id="line-171"> return key;</span> |
| <span class="source-line-no">172</span><span id="line-172"> }</span> |
| <span class="source-line-no">173</span><span id="line-173"></span> |
| <span class="source-line-no">174</span><span id="line-174"> @Override</span> |
| <span class="source-line-no">175</span><span id="line-175"> public Result getCurrentValue() {</span> |
| <span class="source-line-no">176</span><span id="line-176"> return value;</span> |
| <span class="source-line-no">177</span><span id="line-177"> }</span> |
| <span class="source-line-no">178</span><span id="line-178"> }</span> |
| <span class="source-line-no">179</span><span id="line-179"></span> |
| <span class="source-line-no">180</span><span id="line-180"> private class SubMapRecordWriter extends RecordWriter<K2, V2> {</span> |
| <span class="source-line-no">181</span><span id="line-181"></span> |
| <span class="source-line-no">182</span><span id="line-182"> @Override</span> |
| <span class="source-line-no">183</span><span id="line-183"> public void close(TaskAttemptContext context) throws IOException, InterruptedException {</span> |
| <span class="source-line-no">184</span><span id="line-184"> }</span> |
| <span class="source-line-no">185</span><span id="line-185"></span> |
| <span class="source-line-no">186</span><span id="line-186"> @Override</span> |
| <span class="source-line-no">187</span><span id="line-187"> public void write(K2 key, V2 value) throws IOException, InterruptedException {</span> |
| <span class="source-line-no">188</span><span id="line-188"> synchronized (outer) {</span> |
| <span class="source-line-no">189</span><span id="line-189"> outer.write(key, value);</span> |
| <span class="source-line-no">190</span><span id="line-190"> }</span> |
| <span class="source-line-no">191</span><span id="line-191"> }</span> |
| <span class="source-line-no">192</span><span id="line-192"> }</span> |
| <span class="source-line-no">193</span><span id="line-193"></span> |
| <span class="source-line-no">194</span><span id="line-194"> private class SubMapStatusReporter extends StatusReporter {</span> |
| <span class="source-line-no">195</span><span id="line-195"></span> |
| <span class="source-line-no">196</span><span id="line-196"> @Override</span> |
| <span class="source-line-no">197</span><span id="line-197"> public Counter getCounter(Enum<?> name) {</span> |
| <span class="source-line-no">198</span><span id="line-198"> return outer.getCounter(name);</span> |
| <span class="source-line-no">199</span><span id="line-199"> }</span> |
| <span class="source-line-no">200</span><span id="line-200"></span> |
| <span class="source-line-no">201</span><span id="line-201"> @Override</span> |
| <span class="source-line-no">202</span><span id="line-202"> public Counter getCounter(String group, String name) {</span> |
| <span class="source-line-no">203</span><span id="line-203"> return outer.getCounter(group, name);</span> |
| <span class="source-line-no">204</span><span id="line-204"> }</span> |
| <span class="source-line-no">205</span><span id="line-205"></span> |
| <span class="source-line-no">206</span><span id="line-206"> @Override</span> |
| <span class="source-line-no">207</span><span id="line-207"> public void progress() {</span> |
| <span class="source-line-no">208</span><span id="line-208"> outer.progress();</span> |
| <span class="source-line-no">209</span><span id="line-209"> }</span> |
| <span class="source-line-no">210</span><span id="line-210"></span> |
| <span class="source-line-no">211</span><span id="line-211"> @Override</span> |
| <span class="source-line-no">212</span><span id="line-212"> public void setStatus(String status) {</span> |
| <span class="source-line-no">213</span><span id="line-213"> outer.setStatus(status);</span> |
| <span class="source-line-no">214</span><span id="line-214"> }</span> |
| <span class="source-line-no">215</span><span id="line-215"></span> |
| <span class="source-line-no">216</span><span id="line-216"> public float getProgress() {</span> |
| <span class="source-line-no">217</span><span id="line-217"> return 0;</span> |
| <span class="source-line-no">218</span><span id="line-218"> }</span> |
| <span class="source-line-no">219</span><span id="line-219"> }</span> |
| <span class="source-line-no">220</span><span id="line-220"></span> |
| <span class="source-line-no">221</span><span id="line-221"> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value = "REC_CATCH_EXCEPTION",</span> |
| <span class="source-line-no">222</span><span id="line-222"> justification = "Don't understand why FB is complaining about this one."</span> |
| <span class="source-line-no">223</span><span id="line-223"> + " We do throw exception")</span> |
| <span class="source-line-no">224</span><span id="line-224"> private class MapRunner implements Runnable {</span> |
| <span class="source-line-no">225</span><span id="line-225"> private Mapper<ImmutableBytesWritable, Result, K2, V2> mapper;</span> |
| <span class="source-line-no">226</span><span id="line-226"> private Context subcontext;</span> |
| <span class="source-line-no">227</span><span id="line-227"></span> |
| <span class="source-line-no">228</span><span id="line-228"> @SuppressWarnings({ "rawtypes", "unchecked" })</span> |
| <span class="source-line-no">229</span><span id="line-229"> MapRunner(Context context) throws IOException, InterruptedException {</span> |
| <span class="source-line-no">230</span><span id="line-230"> mapper = ReflectionUtils.newInstance(mapClass, context.getConfiguration());</span> |
| <span class="source-line-no">231</span><span id="line-231"> try {</span> |
| <span class="source-line-no">232</span><span id="line-232"> Constructor c = context.getClass().getConstructor(Mapper.class, Configuration.class,</span> |
| <span class="source-line-no">233</span><span id="line-233"> TaskAttemptID.class, RecordReader.class, RecordWriter.class, OutputCommitter.class,</span> |
| <span class="source-line-no">234</span><span id="line-234"> StatusReporter.class, InputSplit.class);</span> |
| <span class="source-line-no">235</span><span id="line-235"> c.setAccessible(true);</span> |
| <span class="source-line-no">236</span><span id="line-236"> subcontext = (Context) c.newInstance(mapper, outer.getConfiguration(),</span> |
| <span class="source-line-no">237</span><span id="line-237"> outer.getTaskAttemptID(), new SubMapRecordReader(), new SubMapRecordWriter(),</span> |
| <span class="source-line-no">238</span><span id="line-238"> context.getOutputCommitter(), new SubMapStatusReporter(), outer.getInputSplit());</span> |
| <span class="source-line-no">239</span><span id="line-239"> } catch (Exception e) {</span> |
| <span class="source-line-no">240</span><span id="line-240"> try {</span> |
| <span class="source-line-no">241</span><span id="line-241"> Constructor c = Class.forName("org.apache.hadoop.mapreduce.task.MapContextImpl")</span> |
| <span class="source-line-no">242</span><span id="line-242"> .getConstructor(Configuration.class, TaskAttemptID.class, RecordReader.class,</span> |
| <span class="source-line-no">243</span><span id="line-243"> RecordWriter.class, OutputCommitter.class, StatusReporter.class, InputSplit.class);</span> |
| <span class="source-line-no">244</span><span id="line-244"> c.setAccessible(true);</span> |
| <span class="source-line-no">245</span><span id="line-245"> MapContext mc = (MapContext) c.newInstance(outer.getConfiguration(),</span> |
| <span class="source-line-no">246</span><span id="line-246"> outer.getTaskAttemptID(), new SubMapRecordReader(), new SubMapRecordWriter(),</span> |
| <span class="source-line-no">247</span><span id="line-247"> context.getOutputCommitter(), new SubMapStatusReporter(), outer.getInputSplit());</span> |
| <span class="source-line-no">248</span><span id="line-248"> Class<?> wrappedMapperClass =</span> |
| <span class="source-line-no">249</span><span id="line-249"> Class.forName("org.apache.hadoop.mapreduce.lib.map.WrappedMapper");</span> |
| <span class="source-line-no">250</span><span id="line-250"> Method getMapContext = wrappedMapperClass.getMethod("getMapContext", MapContext.class);</span> |
| <span class="source-line-no">251</span><span id="line-251"> subcontext = (Context) getMapContext</span> |
| <span class="source-line-no">252</span><span id="line-252"> .invoke(wrappedMapperClass.getDeclaredConstructor().newInstance(), mc);</span> |
| <span class="source-line-no">253</span><span id="line-253"> } catch (Exception ee) { // FindBugs: REC_CATCH_EXCEPTION</span> |
| <span class="source-line-no">254</span><span id="line-254"> // rethrow as IOE</span> |
| <span class="source-line-no">255</span><span id="line-255"> throw new IOException(e);</span> |
| <span class="source-line-no">256</span><span id="line-256"> }</span> |
| <span class="source-line-no">257</span><span id="line-257"> }</span> |
| <span class="source-line-no">258</span><span id="line-258"> }</span> |
| <span class="source-line-no">259</span><span id="line-259"></span> |
| <span class="source-line-no">260</span><span id="line-260"> @Override</span> |
| <span class="source-line-no">261</span><span id="line-261"> public void run() {</span> |
| <span class="source-line-no">262</span><span id="line-262"> try {</span> |
| <span class="source-line-no">263</span><span id="line-263"> mapper.run(subcontext);</span> |
| <span class="source-line-no">264</span><span id="line-264"> } catch (Throwable ie) {</span> |
| <span class="source-line-no">265</span><span id="line-265"> LOG.error("Problem in running map.", ie);</span> |
| <span class="source-line-no">266</span><span id="line-266"> }</span> |
| <span class="source-line-no">267</span><span id="line-267"> }</span> |
| <span class="source-line-no">268</span><span id="line-268"> }</span> |
| <span class="source-line-no">269</span><span id="line-269">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
