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<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<span class="sourceLineNo">011</span> *<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.regionserver;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import static org.junit.Assert.assertEquals;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.io.IOException;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.ArrayList;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.List;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.concurrent.ThreadLocalRandom;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.apache.hadoop.conf.Configuration;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.hadoop.fs.FileSystem;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.Cell;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.HBaseTestingUtil;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.HConstants;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.TableName;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.client.Durability;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.client.Increment;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.client.Scan;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.client.TestIncrementsFromClientSide;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.regionserver.wal.FSHLog;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.testclassification.MediumTests;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.junit.After;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.junit.Before;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.junit.ClassRule;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import org.junit.Rule;<a name="line.44"></a>
<span class="sourceLineNo">045</span>import org.junit.Test;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import org.junit.experimental.categories.Category;<a name="line.46"></a>
<span class="sourceLineNo">047</span>import org.junit.rules.TestName;<a name="line.47"></a>
<span class="sourceLineNo">048</span>import org.slf4j.Logger;<a name="line.48"></a>
<span class="sourceLineNo">049</span>import org.slf4j.LoggerFactory;<a name="line.49"></a>
<span class="sourceLineNo">050</span><a name="line.50"></a>
<span class="sourceLineNo">051</span>/**<a name="line.51"></a>
<span class="sourceLineNo">052</span> * Increments with some concurrency against a region to ensure we get the right answer.<a name="line.52"></a>
<span class="sourceLineNo">053</span> * Test is parameterized to run the fast and slow path increments; if fast,<a name="line.53"></a>
<span class="sourceLineNo">054</span> * HRegion.INCREMENT_FAST_BUT_NARROW_CONSISTENCY_KEY is true.<a name="line.54"></a>
<span class="sourceLineNo">055</span> *<a name="line.55"></a>
<span class="sourceLineNo">056</span> * &lt;p&gt;There is similar test up in TestAtomicOperation. It does a test where it has 100 threads<a name="line.56"></a>
<span class="sourceLineNo">057</span> * doing increments across two column families all on one row and the increments are connected to<a name="line.57"></a>
<span class="sourceLineNo">058</span> * prove atomicity on row.<a name="line.58"></a>
<span class="sourceLineNo">059</span> */<a name="line.59"></a>
<span class="sourceLineNo">060</span>@Category(MediumTests.class)<a name="line.60"></a>
<span class="sourceLineNo">061</span>public class TestRegionIncrement {<a name="line.61"></a>
<span class="sourceLineNo">062</span><a name="line.62"></a>
<span class="sourceLineNo">063</span> @ClassRule<a name="line.63"></a>
<span class="sourceLineNo">064</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.64"></a>
<span class="sourceLineNo">065</span> HBaseClassTestRule.forClass(TestRegionIncrement.class);<a name="line.65"></a>
<span class="sourceLineNo">066</span><a name="line.66"></a>
<span class="sourceLineNo">067</span> private static final Logger LOG = LoggerFactory.getLogger(TestRegionIncrement.class);<a name="line.67"></a>
<span class="sourceLineNo">068</span> @Rule public TestName name = new TestName();<a name="line.68"></a>
<span class="sourceLineNo">069</span> private static HBaseTestingUtil TEST_UTIL;<a name="line.69"></a>
<span class="sourceLineNo">070</span> private final static byte [] INCREMENT_BYTES = Bytes.toBytes("increment");<a name="line.70"></a>
<span class="sourceLineNo">071</span> private static final int THREAD_COUNT = 10;<a name="line.71"></a>
<span class="sourceLineNo">072</span> private static final int INCREMENT_COUNT = 10000;<a name="line.72"></a>
<span class="sourceLineNo">073</span><a name="line.73"></a>
<span class="sourceLineNo">074</span> @Before<a name="line.74"></a>
<span class="sourceLineNo">075</span> public void setUp() throws Exception {<a name="line.75"></a>
<span class="sourceLineNo">076</span> TEST_UTIL = new HBaseTestingUtil();<a name="line.76"></a>
<span class="sourceLineNo">077</span> }<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span> @After<a name="line.79"></a>
<span class="sourceLineNo">080</span> public void tearDown() throws Exception {<a name="line.80"></a>
<span class="sourceLineNo">081</span> TEST_UTIL.cleanupTestDir();<a name="line.81"></a>
<span class="sourceLineNo">082</span> }<a name="line.82"></a>
<span class="sourceLineNo">083</span><a name="line.83"></a>
<span class="sourceLineNo">084</span> private HRegion getRegion(final Configuration conf, final String tableName) throws IOException {<a name="line.84"></a>
<span class="sourceLineNo">085</span> FSHLog wal = new FSHLog(FileSystem.get(conf), TEST_UTIL.getDataTestDir(),<a name="line.85"></a>
<span class="sourceLineNo">086</span> TEST_UTIL.getDataTestDir().toString(), conf);<a name="line.86"></a>
<span class="sourceLineNo">087</span> wal.init();<a name="line.87"></a>
<span class="sourceLineNo">088</span> ChunkCreator.initialize(MemStoreLAB.CHUNK_SIZE_DEFAULT, false, 0, 0,<a name="line.88"></a>
<span class="sourceLineNo">089</span> 0, null, MemStoreLAB.INDEX_CHUNK_SIZE_PERCENTAGE_DEFAULT);<a name="line.89"></a>
<span class="sourceLineNo">090</span> return TEST_UTIL.createLocalHRegion(TableName.valueOf(tableName), HConstants.EMPTY_BYTE_ARRAY,<a name="line.90"></a>
<span class="sourceLineNo">091</span> HConstants.EMPTY_BYTE_ARRAY, conf, false, Durability.SKIP_WAL, wal, INCREMENT_BYTES);<a name="line.91"></a>
<span class="sourceLineNo">092</span> }<a name="line.92"></a>
<span class="sourceLineNo">093</span><a name="line.93"></a>
<span class="sourceLineNo">094</span> private void closeRegion(final HRegion region) throws IOException {<a name="line.94"></a>
<span class="sourceLineNo">095</span> region.close();<a name="line.95"></a>
<span class="sourceLineNo">096</span> region.getWAL().close();<a name="line.96"></a>
<span class="sourceLineNo">097</span> }<a name="line.97"></a>
<span class="sourceLineNo">098</span><a name="line.98"></a>
<span class="sourceLineNo">099</span> @Test<a name="line.99"></a>
<span class="sourceLineNo">100</span> public void testMVCCCausingMisRead() throws IOException {<a name="line.100"></a>
<span class="sourceLineNo">101</span> final HRegion region = getRegion(TEST_UTIL.getConfiguration(), this.name.getMethodName());<a name="line.101"></a>
<span class="sourceLineNo">102</span> try {<a name="line.102"></a>
<span class="sourceLineNo">103</span> // ADD TEST HERE!!<a name="line.103"></a>
<span class="sourceLineNo">104</span> } finally {<a name="line.104"></a>
<span class="sourceLineNo">105</span> closeRegion(region);<a name="line.105"></a>
<span class="sourceLineNo">106</span> }<a name="line.106"></a>
<span class="sourceLineNo">107</span> }<a name="line.107"></a>
<span class="sourceLineNo">108</span><a name="line.108"></a>
<span class="sourceLineNo">109</span> /**<a name="line.109"></a>
<span class="sourceLineNo">110</span> * Increments a single cell a bunch of times.<a name="line.110"></a>
<span class="sourceLineNo">111</span> */<a name="line.111"></a>
<span class="sourceLineNo">112</span> private static class SingleCellIncrementer extends Thread {<a name="line.112"></a>
<span class="sourceLineNo">113</span> private final int count;<a name="line.113"></a>
<span class="sourceLineNo">114</span> private final HRegion region;<a name="line.114"></a>
<span class="sourceLineNo">115</span> private final Increment increment;<a name="line.115"></a>
<span class="sourceLineNo">116</span><a name="line.116"></a>
<span class="sourceLineNo">117</span> SingleCellIncrementer(final int i, final int count, final HRegion region,<a name="line.117"></a>
<span class="sourceLineNo">118</span> final Increment increment) {<a name="line.118"></a>
<span class="sourceLineNo">119</span> super("" + i);<a name="line.119"></a>
<span class="sourceLineNo">120</span> setDaemon(true);<a name="line.120"></a>
<span class="sourceLineNo">121</span> this.count = count;<a name="line.121"></a>
<span class="sourceLineNo">122</span> this.region = region;<a name="line.122"></a>
<span class="sourceLineNo">123</span> this.increment = increment;<a name="line.123"></a>
<span class="sourceLineNo">124</span> }<a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
<span class="sourceLineNo">126</span> @Override<a name="line.126"></a>
<span class="sourceLineNo">127</span> public void run() {<a name="line.127"></a>
<span class="sourceLineNo">128</span> for (int i = 0; i &lt; this.count; i++) {<a name="line.128"></a>
<span class="sourceLineNo">129</span> try {<a name="line.129"></a>
<span class="sourceLineNo">130</span> this.region.increment(this.increment);<a name="line.130"></a>
<span class="sourceLineNo">131</span> // LOG.info(getName() + " " + i);<a name="line.131"></a>
<span class="sourceLineNo">132</span> } catch (IOException e) {<a name="line.132"></a>
<span class="sourceLineNo">133</span> throw new RuntimeException(e);<a name="line.133"></a>
<span class="sourceLineNo">134</span> }<a name="line.134"></a>
<span class="sourceLineNo">135</span> }<a name="line.135"></a>
<span class="sourceLineNo">136</span> }<a name="line.136"></a>
<span class="sourceLineNo">137</span> }<a name="line.137"></a>
<span class="sourceLineNo">138</span><a name="line.138"></a>
<span class="sourceLineNo">139</span> /**<a name="line.139"></a>
<span class="sourceLineNo">140</span> * Increments a random row's Cell &lt;code&gt;count&lt;/code&gt; times.<a name="line.140"></a>
<span class="sourceLineNo">141</span> */<a name="line.141"></a>
<span class="sourceLineNo">142</span> private static class CrossRowCellIncrementer extends Thread {<a name="line.142"></a>
<span class="sourceLineNo">143</span> private final int count;<a name="line.143"></a>
<span class="sourceLineNo">144</span> private final HRegion region;<a name="line.144"></a>
<span class="sourceLineNo">145</span> private final Increment [] increments;<a name="line.145"></a>
<span class="sourceLineNo">146</span><a name="line.146"></a>
<span class="sourceLineNo">147</span> CrossRowCellIncrementer(final int i, final int count, final HRegion region, final int range) {<a name="line.147"></a>
<span class="sourceLineNo">148</span> super("" + i);<a name="line.148"></a>
<span class="sourceLineNo">149</span> setDaemon(true);<a name="line.149"></a>
<span class="sourceLineNo">150</span> this.count = count;<a name="line.150"></a>
<span class="sourceLineNo">151</span> this.region = region;<a name="line.151"></a>
<span class="sourceLineNo">152</span> this.increments = new Increment[range];<a name="line.152"></a>
<span class="sourceLineNo">153</span> for (int ii = 0; ii &lt; range; ii++) {<a name="line.153"></a>
<span class="sourceLineNo">154</span> this.increments[ii] = new Increment(Bytes.toBytes(i));<a name="line.154"></a>
<span class="sourceLineNo">155</span> this.increments[ii].addColumn(INCREMENT_BYTES, INCREMENT_BYTES, 1);<a name="line.155"></a>
<span class="sourceLineNo">156</span> }<a name="line.156"></a>
<span class="sourceLineNo">157</span> }<a name="line.157"></a>
<span class="sourceLineNo">158</span><a name="line.158"></a>
<span class="sourceLineNo">159</span> @Override<a name="line.159"></a>
<span class="sourceLineNo">160</span> public void run() {<a name="line.160"></a>
<span class="sourceLineNo">161</span> for (int i = 0; i &lt; this.count; i++) {<a name="line.161"></a>
<span class="sourceLineNo">162</span> try {<a name="line.162"></a>
<span class="sourceLineNo">163</span> int index = ThreadLocalRandom.current().nextInt(0, this.increments.length);<a name="line.163"></a>
<span class="sourceLineNo">164</span> this.region.increment(this.increments[index]);<a name="line.164"></a>
<span class="sourceLineNo">165</span> // LOG.info(getName() + " " + index);<a name="line.165"></a>
<span class="sourceLineNo">166</span> } catch (IOException e) {<a name="line.166"></a>
<span class="sourceLineNo">167</span> throw new RuntimeException(e);<a name="line.167"></a>
<span class="sourceLineNo">168</span> }<a name="line.168"></a>
<span class="sourceLineNo">169</span> }<a name="line.169"></a>
<span class="sourceLineNo">170</span> }<a name="line.170"></a>
<span class="sourceLineNo">171</span> }<a name="line.171"></a>
<span class="sourceLineNo">172</span><a name="line.172"></a>
<span class="sourceLineNo">173</span> /**<a name="line.173"></a>
<span class="sourceLineNo">174</span> * Have each thread update its own Cell. Avoid contention with another thread.<a name="line.174"></a>
<span class="sourceLineNo">175</span> */<a name="line.175"></a>
<span class="sourceLineNo">176</span> @Test<a name="line.176"></a>
<span class="sourceLineNo">177</span> public void testUnContendedSingleCellIncrement()<a name="line.177"></a>
<span class="sourceLineNo">178</span> throws IOException, InterruptedException {<a name="line.178"></a>
<span class="sourceLineNo">179</span> final HRegion region = getRegion(TEST_UTIL.getConfiguration(),<a name="line.179"></a>
<span class="sourceLineNo">180</span> TestIncrementsFromClientSide.filterStringSoTableNameSafe(this.name.getMethodName()));<a name="line.180"></a>
<span class="sourceLineNo">181</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.181"></a>
<span class="sourceLineNo">182</span> try {<a name="line.182"></a>
<span class="sourceLineNo">183</span> SingleCellIncrementer [] threads = new SingleCellIncrementer[THREAD_COUNT];<a name="line.183"></a>
<span class="sourceLineNo">184</span> for (int i = 0; i &lt; threads.length; i++) {<a name="line.184"></a>
<span class="sourceLineNo">185</span> byte [] rowBytes = Bytes.toBytes(i);<a name="line.185"></a>
<span class="sourceLineNo">186</span> Increment increment = new Increment(rowBytes);<a name="line.186"></a>
<span class="sourceLineNo">187</span> increment.addColumn(INCREMENT_BYTES, INCREMENT_BYTES, 1);<a name="line.187"></a>
<span class="sourceLineNo">188</span> threads[i] = new SingleCellIncrementer(i, INCREMENT_COUNT, region, increment);<a name="line.188"></a>
<span class="sourceLineNo">189</span> }<a name="line.189"></a>
<span class="sourceLineNo">190</span> for (int i = 0; i &lt; threads.length; i++) {<a name="line.190"></a>
<span class="sourceLineNo">191</span> threads[i].start();<a name="line.191"></a>
<span class="sourceLineNo">192</span> }<a name="line.192"></a>
<span class="sourceLineNo">193</span> for (int i = 0; i &lt; threads.length; i++) {<a name="line.193"></a>
<span class="sourceLineNo">194</span> threads[i].join();<a name="line.194"></a>
<span class="sourceLineNo">195</span> }<a name="line.195"></a>
<span class="sourceLineNo">196</span> RegionScanner regionScanner = region.getScanner(new Scan());<a name="line.196"></a>
<span class="sourceLineNo">197</span> List&lt;Cell&gt; cells = new ArrayList&lt;&gt;(THREAD_COUNT);<a name="line.197"></a>
<span class="sourceLineNo">198</span> while(regionScanner.next(cells)) continue;<a name="line.198"></a>
<span class="sourceLineNo">199</span> assertEquals(THREAD_COUNT, cells.size());<a name="line.199"></a>
<span class="sourceLineNo">200</span> long total = 0;<a name="line.200"></a>
<span class="sourceLineNo">201</span> for (Cell cell: cells) total +=<a name="line.201"></a>
<span class="sourceLineNo">202</span> Bytes.toLong(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength());<a name="line.202"></a>
<span class="sourceLineNo">203</span> assertEquals(INCREMENT_COUNT * THREAD_COUNT, total);<a name="line.203"></a>
<span class="sourceLineNo">204</span> } finally {<a name="line.204"></a>
<span class="sourceLineNo">205</span> closeRegion(region);<a name="line.205"></a>
<span class="sourceLineNo">206</span> LOG.info(this.name.getMethodName() + " " +<a name="line.206"></a>
<span class="sourceLineNo">207</span> (EnvironmentEdgeManager.currentTime() - startTime) + "ms");<a name="line.207"></a>
<span class="sourceLineNo">208</span> }<a name="line.208"></a>
<span class="sourceLineNo">209</span> }<a name="line.209"></a>
<span class="sourceLineNo">210</span><a name="line.210"></a>
<span class="sourceLineNo">211</span> /**<a name="line.211"></a>
<span class="sourceLineNo">212</span> * Have each thread update its own Cell. Avoid contention with another thread.<a name="line.212"></a>
<span class="sourceLineNo">213</span> */<a name="line.213"></a>
<span class="sourceLineNo">214</span> @Test<a name="line.214"></a>
<span class="sourceLineNo">215</span> public void testContendedAcrossCellsIncrement() throws IOException, InterruptedException {<a name="line.215"></a>
<span class="sourceLineNo">216</span> final HRegion region = getRegion(TEST_UTIL.getConfiguration(),<a name="line.216"></a>
<span class="sourceLineNo">217</span> TestIncrementsFromClientSide.filterStringSoTableNameSafe(this.name.getMethodName()));<a name="line.217"></a>
<span class="sourceLineNo">218</span> long startTime = EnvironmentEdgeManager.currentTime();<a name="line.218"></a>
<span class="sourceLineNo">219</span> try {<a name="line.219"></a>
<span class="sourceLineNo">220</span> CrossRowCellIncrementer [] threads = new CrossRowCellIncrementer[THREAD_COUNT];<a name="line.220"></a>
<span class="sourceLineNo">221</span> for (int i = 0; i &lt; threads.length; i++) {<a name="line.221"></a>
<span class="sourceLineNo">222</span> threads[i] = new CrossRowCellIncrementer(i, INCREMENT_COUNT, region, THREAD_COUNT);<a name="line.222"></a>
<span class="sourceLineNo">223</span> }<a name="line.223"></a>
<span class="sourceLineNo">224</span> for (int i = 0; i &lt; threads.length; i++) {<a name="line.224"></a>
<span class="sourceLineNo">225</span> threads[i].start();<a name="line.225"></a>
<span class="sourceLineNo">226</span> }<a name="line.226"></a>
<span class="sourceLineNo">227</span> for (int i = 0; i &lt; threads.length; i++) {<a name="line.227"></a>
<span class="sourceLineNo">228</span> threads[i].join();<a name="line.228"></a>
<span class="sourceLineNo">229</span> }<a name="line.229"></a>
<span class="sourceLineNo">230</span> RegionScanner regionScanner = region.getScanner(new Scan());<a name="line.230"></a>
<span class="sourceLineNo">231</span> List&lt;Cell&gt; cells = new ArrayList&lt;&gt;(100);<a name="line.231"></a>
<span class="sourceLineNo">232</span> while(regionScanner.next(cells)) continue;<a name="line.232"></a>
<span class="sourceLineNo">233</span> assertEquals(THREAD_COUNT, cells.size());<a name="line.233"></a>
<span class="sourceLineNo">234</span> long total = 0;<a name="line.234"></a>
<span class="sourceLineNo">235</span> for (Cell cell: cells) total +=<a name="line.235"></a>
<span class="sourceLineNo">236</span> Bytes.toLong(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength());<a name="line.236"></a>
<span class="sourceLineNo">237</span> assertEquals(INCREMENT_COUNT * THREAD_COUNT, total);<a name="line.237"></a>
<span class="sourceLineNo">238</span> } finally {<a name="line.238"></a>
<span class="sourceLineNo">239</span> closeRegion(region);<a name="line.239"></a>
<span class="sourceLineNo">240</span> LOG.info(this.name.getMethodName() + " " +<a name="line.240"></a>
<span class="sourceLineNo">241</span> (EnvironmentEdgeManager.currentTime() - startTime) + "ms");<a name="line.241"></a>
<span class="sourceLineNo">242</span> }<a name="line.242"></a>
<span class="sourceLineNo">243</span> }<a name="line.243"></a>
<span class="sourceLineNo">244</span>}<a name="line.244"></a>
</pre>
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