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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.procedure;</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.Closeable;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.IOException;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.ArrayList;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.List;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.concurrent.Callable;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.concurrent.ExecutionException;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.concurrent.ExecutorCompletionService;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.concurrent.ExecutorService;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.concurrent.Executors;</span> |
| <span class="source-line-no">029</span><span id="line-29">import java.util.concurrent.Future;</span> |
| <span class="source-line-no">030</span><span id="line-30">import java.util.concurrent.ThreadPoolExecutor;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.Abortable;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.errorhandling.ForeignException;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.regionserver.RegionServerServices;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.util.Threads;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.zookeeper.ZKWatcher;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.zookeeper.KeeperException;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.slf4j.Logger;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.hbase.thirdparty.com.google.common.util.concurrent.ThreadFactoryBuilder;</span> |
| <span class="source-line-no">044</span><span id="line-44"></span> |
| <span class="source-line-no">045</span><span id="line-45">public class SimpleRSProcedureManager extends RegionServerProcedureManager {</span> |
| <span class="source-line-no">046</span><span id="line-46"></span> |
| <span class="source-line-no">047</span><span id="line-47"> private static final Logger LOG = LoggerFactory.getLogger(SimpleRSProcedureManager.class);</span> |
| <span class="source-line-no">048</span><span id="line-48"></span> |
| <span class="source-line-no">049</span><span id="line-49"> private RegionServerServices rss;</span> |
| <span class="source-line-no">050</span><span id="line-50"> private ProcedureMemberRpcs memberRpcs;</span> |
| <span class="source-line-no">051</span><span id="line-51"> private ProcedureMember member;</span> |
| <span class="source-line-no">052</span><span id="line-52"></span> |
| <span class="source-line-no">053</span><span id="line-53"> @Override</span> |
| <span class="source-line-no">054</span><span id="line-54"> public void initialize(RegionServerServices rss) throws KeeperException {</span> |
| <span class="source-line-no">055</span><span id="line-55"> this.rss = rss;</span> |
| <span class="source-line-no">056</span><span id="line-56"> ZKWatcher zkw = rss.getZooKeeper();</span> |
| <span class="source-line-no">057</span><span id="line-57"> this.memberRpcs = new ZKProcedureMemberRpcs(zkw, getProcedureSignature());</span> |
| <span class="source-line-no">058</span><span id="line-58"></span> |
| <span class="source-line-no">059</span><span id="line-59"> ThreadPoolExecutor pool = ProcedureMember.defaultPool(rss.getServerName().toString(), 1);</span> |
| <span class="source-line-no">060</span><span id="line-60"> this.member = new ProcedureMember(memberRpcs, pool, new SimleSubprocedureBuilder());</span> |
| <span class="source-line-no">061</span><span id="line-61"> LOG.info("Initialized: " + rss.getServerName().toString());</span> |
| <span class="source-line-no">062</span><span id="line-62"> }</span> |
| <span class="source-line-no">063</span><span id="line-63"></span> |
| <span class="source-line-no">064</span><span id="line-64"> @Override</span> |
| <span class="source-line-no">065</span><span id="line-65"> public void start() {</span> |
| <span class="source-line-no">066</span><span id="line-66"> this.memberRpcs.start(rss.getServerName().toString(), member);</span> |
| <span class="source-line-no">067</span><span id="line-67"> LOG.info("Started.");</span> |
| <span class="source-line-no">068</span><span id="line-68"> }</span> |
| <span class="source-line-no">069</span><span id="line-69"></span> |
| <span class="source-line-no">070</span><span id="line-70"> @Override</span> |
| <span class="source-line-no">071</span><span id="line-71"> public void stop(boolean force) throws IOException {</span> |
| <span class="source-line-no">072</span><span id="line-72"> LOG.info("stop: " + force);</span> |
| <span class="source-line-no">073</span><span id="line-73"> try {</span> |
| <span class="source-line-no">074</span><span id="line-74"> this.member.close();</span> |
| <span class="source-line-no">075</span><span id="line-75"> } finally {</span> |
| <span class="source-line-no">076</span><span id="line-76"> this.memberRpcs.close();</span> |
| <span class="source-line-no">077</span><span id="line-77"> }</span> |
| <span class="source-line-no">078</span><span id="line-78"> }</span> |
| <span class="source-line-no">079</span><span id="line-79"></span> |
| <span class="source-line-no">080</span><span id="line-80"> @Override</span> |
| <span class="source-line-no">081</span><span id="line-81"> public String getProcedureSignature() {</span> |
| <span class="source-line-no">082</span><span id="line-82"> return SimpleMasterProcedureManager.SIMPLE_SIGNATURE;</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"> * If in a running state, creates the specified subprocedure for handling a procedure.</span> |
| <span class="source-line-no">087</span><span id="line-87"> * @return Subprocedure to submit to the ProcedureMember.</span> |
| <span class="source-line-no">088</span><span id="line-88"> */</span> |
| <span class="source-line-no">089</span><span id="line-89"> public Subprocedure buildSubprocedure(String name) {</span> |
| <span class="source-line-no">090</span><span id="line-90"></span> |
| <span class="source-line-no">091</span><span id="line-91"> // don't run a procedure if the parent is stop(ping)</span> |
| <span class="source-line-no">092</span><span id="line-92"> if (rss.isStopping() || rss.isStopped()) {</span> |
| <span class="source-line-no">093</span><span id="line-93"> throw new IllegalStateException(</span> |
| <span class="source-line-no">094</span><span id="line-94"> "Can't start procedure on RS: " + rss.getServerName() + ", because stopping/stopped!");</span> |
| <span class="source-line-no">095</span><span id="line-95"> }</span> |
| <span class="source-line-no">096</span><span id="line-96"></span> |
| <span class="source-line-no">097</span><span id="line-97"> LOG.info("Attempting to run a procedure.");</span> |
| <span class="source-line-no">098</span><span id="line-98"> ForeignExceptionDispatcher errorDispatcher = new ForeignExceptionDispatcher();</span> |
| <span class="source-line-no">099</span><span id="line-99"> Configuration conf = rss.getConfiguration();</span> |
| <span class="source-line-no">100</span><span id="line-100"></span> |
| <span class="source-line-no">101</span><span id="line-101"> SimpleSubprocedurePool taskManager =</span> |
| <span class="source-line-no">102</span><span id="line-102"> new SimpleSubprocedurePool(rss.getServerName().toString(), conf);</span> |
| <span class="source-line-no">103</span><span id="line-103"> return new SimpleSubprocedure(rss, member, errorDispatcher, taskManager, name);</span> |
| <span class="source-line-no">104</span><span id="line-104"> }</span> |
| <span class="source-line-no">105</span><span id="line-105"></span> |
| <span class="source-line-no">106</span><span id="line-106"> /**</span> |
| <span class="source-line-no">107</span><span id="line-107"> * Build the actual procedure runner that will do all the 'hard' work</span> |
| <span class="source-line-no">108</span><span id="line-108"> */</span> |
| <span class="source-line-no">109</span><span id="line-109"> public class SimleSubprocedureBuilder implements SubprocedureFactory {</span> |
| <span class="source-line-no">110</span><span id="line-110"></span> |
| <span class="source-line-no">111</span><span id="line-111"> @Override</span> |
| <span class="source-line-no">112</span><span id="line-112"> public Subprocedure buildSubprocedure(String name, byte[] data) {</span> |
| <span class="source-line-no">113</span><span id="line-113"> LOG.info("Building procedure: " + name);</span> |
| <span class="source-line-no">114</span><span id="line-114"> return SimpleRSProcedureManager.this.buildSubprocedure(name);</span> |
| <span class="source-line-no">115</span><span id="line-115"> }</span> |
| <span class="source-line-no">116</span><span id="line-116"> }</span> |
| <span class="source-line-no">117</span><span id="line-117"></span> |
| <span class="source-line-no">118</span><span id="line-118"> public static class SimpleSubprocedurePool implements Closeable, Abortable {</span> |
| <span class="source-line-no">119</span><span id="line-119"></span> |
| <span class="source-line-no">120</span><span id="line-120"> private final ExecutorCompletionService<Void> taskPool;</span> |
| <span class="source-line-no">121</span><span id="line-121"> private final ExecutorService executor;</span> |
| <span class="source-line-no">122</span><span id="line-122"> private volatile boolean aborted;</span> |
| <span class="source-line-no">123</span><span id="line-123"> private final List<Future<Void>> futures = new ArrayList<>();</span> |
| <span class="source-line-no">124</span><span id="line-124"> private final String name;</span> |
| <span class="source-line-no">125</span><span id="line-125"></span> |
| <span class="source-line-no">126</span><span id="line-126"> public SimpleSubprocedurePool(String name, Configuration conf) {</span> |
| <span class="source-line-no">127</span><span id="line-127"> this.name = name;</span> |
| <span class="source-line-no">128</span><span id="line-128"> executor = Executors.newSingleThreadExecutor(</span> |
| <span class="source-line-no">129</span><span id="line-129"> new ThreadFactoryBuilder().setNameFormat("rs(" + name + ")-procedure-pool-%d")</span> |
| <span class="source-line-no">130</span><span id="line-130"> .setDaemon(true).setUncaughtExceptionHandler(Threads.LOGGING_EXCEPTION_HANDLER).build());</span> |
| <span class="source-line-no">131</span><span id="line-131"> taskPool = new ExecutorCompletionService<>(executor);</span> |
| <span class="source-line-no">132</span><span id="line-132"> }</span> |
| <span class="source-line-no">133</span><span id="line-133"></span> |
| <span class="source-line-no">134</span><span id="line-134"> /**</span> |
| <span class="source-line-no">135</span><span id="line-135"> * Submit a task to the pool.</span> |
| <span class="source-line-no">136</span><span id="line-136"> */</span> |
| <span class="source-line-no">137</span><span id="line-137"> public void submitTask(final Callable<Void> task) {</span> |
| <span class="source-line-no">138</span><span id="line-138"> Future<Void> f = this.taskPool.submit(task);</span> |
| <span class="source-line-no">139</span><span id="line-139"> futures.add(f);</span> |
| <span class="source-line-no">140</span><span id="line-140"> }</span> |
| <span class="source-line-no">141</span><span id="line-141"></span> |
| <span class="source-line-no">142</span><span id="line-142"> /**</span> |
| <span class="source-line-no">143</span><span id="line-143"> * Wait for all of the currently outstanding tasks submitted via {@link #submitTask(Callable)}</span> |
| <span class="source-line-no">144</span><span id="line-144"> * @return <tt>true</tt> on success, <tt>false</tt> otherwise</span> |
| <span class="source-line-no">145</span><span id="line-145"> */</span> |
| <span class="source-line-no">146</span><span id="line-146"> public boolean waitForOutstandingTasks() throws ForeignException {</span> |
| <span class="source-line-no">147</span><span id="line-147"> LOG.debug("Waiting for procedure to finish.");</span> |
| <span class="source-line-no">148</span><span id="line-148"></span> |
| <span class="source-line-no">149</span><span id="line-149"> try {</span> |
| <span class="source-line-no">150</span><span id="line-150"> for (Future<Void> f : futures) {</span> |
| <span class="source-line-no">151</span><span id="line-151"> f.get();</span> |
| <span class="source-line-no">152</span><span id="line-152"> }</span> |
| <span class="source-line-no">153</span><span id="line-153"> return true;</span> |
| <span class="source-line-no">154</span><span id="line-154"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">155</span><span id="line-155"> if (aborted)</span> |
| <span class="source-line-no">156</span><span id="line-156"> throw new ForeignException("Interrupted and found to be aborted while waiting for tasks!",</span> |
| <span class="source-line-no">157</span><span id="line-157"> e);</span> |
| <span class="source-line-no">158</span><span id="line-158"> Thread.currentThread().interrupt();</span> |
| <span class="source-line-no">159</span><span id="line-159"> } catch (ExecutionException e) {</span> |
| <span class="source-line-no">160</span><span id="line-160"> if (e.getCause() instanceof ForeignException) {</span> |
| <span class="source-line-no">161</span><span id="line-161"> throw (ForeignException) e.getCause();</span> |
| <span class="source-line-no">162</span><span id="line-162"> }</span> |
| <span class="source-line-no">163</span><span id="line-163"> throw new ForeignException(name, e.getCause());</span> |
| <span class="source-line-no">164</span><span id="line-164"> } finally {</span> |
| <span class="source-line-no">165</span><span id="line-165"> // close off remaining tasks</span> |
| <span class="source-line-no">166</span><span id="line-166"> for (Future<Void> f : futures) {</span> |
| <span class="source-line-no">167</span><span id="line-167"> if (!f.isDone()) {</span> |
| <span class="source-line-no">168</span><span id="line-168"> f.cancel(true);</span> |
| <span class="source-line-no">169</span><span id="line-169"> }</span> |
| <span class="source-line-no">170</span><span id="line-170"> }</span> |
| <span class="source-line-no">171</span><span id="line-171"> }</span> |
| <span class="source-line-no">172</span><span id="line-172"> return false;</span> |
| <span class="source-line-no">173</span><span id="line-173"> }</span> |
| <span class="source-line-no">174</span><span id="line-174"></span> |
| <span class="source-line-no">175</span><span id="line-175"> /**</span> |
| <span class="source-line-no">176</span><span id="line-176"> * Attempt to cleanly shutdown any running tasks - allows currently running tasks to cleanly</span> |
| <span class="source-line-no">177</span><span id="line-177"> * finish</span> |
| <span class="source-line-no">178</span><span id="line-178"> */</span> |
| <span class="source-line-no">179</span><span id="line-179"> @Override</span> |
| <span class="source-line-no">180</span><span id="line-180"> public void close() {</span> |
| <span class="source-line-no">181</span><span id="line-181"> executor.shutdown();</span> |
| <span class="source-line-no">182</span><span id="line-182"> }</span> |
| <span class="source-line-no">183</span><span id="line-183"></span> |
| <span class="source-line-no">184</span><span id="line-184"> @Override</span> |
| <span class="source-line-no">185</span><span id="line-185"> public void abort(String why, Throwable e) {</span> |
| <span class="source-line-no">186</span><span id="line-186"> if (this.aborted) return;</span> |
| <span class="source-line-no">187</span><span id="line-187"></span> |
| <span class="source-line-no">188</span><span id="line-188"> this.aborted = true;</span> |
| <span class="source-line-no">189</span><span id="line-189"> LOG.warn("Aborting because: " + why, e);</span> |
| <span class="source-line-no">190</span><span id="line-190"> this.executor.shutdownNow();</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"> @Override</span> |
| <span class="source-line-no">194</span><span id="line-194"> public boolean isAborted() {</span> |
| <span class="source-line-no">195</span><span id="line-195"> return this.aborted;</span> |
| <span class="source-line-no">196</span><span id="line-196"> }</span> |
| <span class="source-line-no">197</span><span id="line-197"> }</span> |
| <span class="source-line-no">198</span><span id="line-198"></span> |
| <span class="source-line-no">199</span><span id="line-199"> public class SimpleSubprocedure extends Subprocedure {</span> |
| <span class="source-line-no">200</span><span id="line-200"> private final RegionServerServices rss;</span> |
| <span class="source-line-no">201</span><span id="line-201"> private final SimpleSubprocedurePool taskManager;</span> |
| <span class="source-line-no">202</span><span id="line-202"></span> |
| <span class="source-line-no">203</span><span id="line-203"> public SimpleSubprocedure(RegionServerServices rss, ProcedureMember member,</span> |
| <span class="source-line-no">204</span><span id="line-204"> ForeignExceptionDispatcher errorListener, SimpleSubprocedurePool taskManager, String name) {</span> |
| <span class="source-line-no">205</span><span id="line-205"> super(member, name, errorListener, 500, 60000);</span> |
| <span class="source-line-no">206</span><span id="line-206"> LOG.info("Constructing a SimpleSubprocedure.");</span> |
| <span class="source-line-no">207</span><span id="line-207"> this.rss = rss;</span> |
| <span class="source-line-no">208</span><span id="line-208"> this.taskManager = taskManager;</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"> /**</span> |
| <span class="source-line-no">212</span><span id="line-212"> * Callable task. TODO. We don't need a thread pool to execute roll log. This can be simplified</span> |
| <span class="source-line-no">213</span><span id="line-213"> * with no use of subprocedurepool.</span> |
| <span class="source-line-no">214</span><span id="line-214"> */</span> |
| <span class="source-line-no">215</span><span id="line-215"> class RSSimpleTask implements Callable<Void> {</span> |
| <span class="source-line-no">216</span><span id="line-216"> RSSimpleTask() {</span> |
| <span class="source-line-no">217</span><span id="line-217"> }</span> |
| <span class="source-line-no">218</span><span id="line-218"></span> |
| <span class="source-line-no">219</span><span id="line-219"> @Override</span> |
| <span class="source-line-no">220</span><span id="line-220"> public Void call() throws Exception {</span> |
| <span class="source-line-no">221</span><span id="line-221"> LOG.info("Execute subprocedure on " + rss.getServerName().toString());</span> |
| <span class="source-line-no">222</span><span id="line-222"> return null;</span> |
| <span class="source-line-no">223</span><span id="line-223"> }</span> |
| <span class="source-line-no">224</span><span id="line-224"></span> |
| <span class="source-line-no">225</span><span id="line-225"> }</span> |
| <span class="source-line-no">226</span><span id="line-226"></span> |
| <span class="source-line-no">227</span><span id="line-227"> private void execute() throws ForeignException {</span> |
| <span class="source-line-no">228</span><span id="line-228"></span> |
| <span class="source-line-no">229</span><span id="line-229"> monitor.rethrowException();</span> |
| <span class="source-line-no">230</span><span id="line-230"></span> |
| <span class="source-line-no">231</span><span id="line-231"> // running a task (e.g., roll log, flush table) on region server</span> |
| <span class="source-line-no">232</span><span id="line-232"> taskManager.submitTask(new RSSimpleTask());</span> |
| <span class="source-line-no">233</span><span id="line-233"> monitor.rethrowException();</span> |
| <span class="source-line-no">234</span><span id="line-234"></span> |
| <span class="source-line-no">235</span><span id="line-235"> // wait for everything to complete.</span> |
| <span class="source-line-no">236</span><span id="line-236"> taskManager.waitForOutstandingTasks();</span> |
| <span class="source-line-no">237</span><span id="line-237"> monitor.rethrowException();</span> |
| <span class="source-line-no">238</span><span id="line-238"></span> |
| <span class="source-line-no">239</span><span id="line-239"> }</span> |
| <span class="source-line-no">240</span><span id="line-240"></span> |
| <span class="source-line-no">241</span><span id="line-241"> @Override</span> |
| <span class="source-line-no">242</span><span id="line-242"> public void acquireBarrier() throws ForeignException {</span> |
| <span class="source-line-no">243</span><span id="line-243"> // do nothing, executing in inside barrier step.</span> |
| <span class="source-line-no">244</span><span id="line-244"> }</span> |
| <span class="source-line-no">245</span><span id="line-245"></span> |
| <span class="source-line-no">246</span><span id="line-246"> /**</span> |
| <span class="source-line-no">247</span><span id="line-247"> * do a log roll.</span> |
| <span class="source-line-no">248</span><span id="line-248"> */</span> |
| <span class="source-line-no">249</span><span id="line-249"> @Override</span> |
| <span class="source-line-no">250</span><span id="line-250"> public byte[] insideBarrier() throws ForeignException {</span> |
| <span class="source-line-no">251</span><span id="line-251"> execute();</span> |
| <span class="source-line-no">252</span><span id="line-252"> return Bytes.toBytes(SimpleMasterProcedureManager.SIMPLE_DATA);</span> |
| <span class="source-line-no">253</span><span id="line-253"> }</span> |
| <span class="source-line-no">254</span><span id="line-254"></span> |
| <span class="source-line-no">255</span><span id="line-255"> /**</span> |
| <span class="source-line-no">256</span><span id="line-256"> * Cancel threads if they haven't finished.</span> |
| <span class="source-line-no">257</span><span id="line-257"> */</span> |
| <span class="source-line-no">258</span><span id="line-258"> @Override</span> |
| <span class="source-line-no">259</span><span id="line-259"> public void cleanup(Exception e) {</span> |
| <span class="source-line-no">260</span><span id="line-260"> taskManager.abort("Aborting simple subprocedure tasks due to error", e);</span> |
| <span class="source-line-no">261</span><span id="line-261"> }</span> |
| <span class="source-line-no">262</span><span id="line-262"> }</span> |
| <span class="source-line-no">263</span><span id="line-263"></span> |
| <span class="source-line-no">264</span><span id="line-264">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
