| <!DOCTYPE HTML> |
| <html lang="en"> |
| <head> |
| <!-- Generated by javadoc (17) --> |
| <title>Source code</title> |
| <meta name="viewport" content="width=device-width, initial-scale=1"> |
| <meta name="description" content="source: package: org.apache.hadoop.hbase.zookeeper, class: TestZKNodeTracker, class: TestTracker"> |
| <meta name="generator" content="javadoc/SourceToHTMLConverter"> |
| <link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style"> |
| </head> |
| <body class="source-page"> |
| <main role="main"> |
| <div class="source-container"> |
| <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.zookeeper;</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 static org.junit.Assert.assertEquals;</span> |
| <span class="source-line-no">021</span><span id="line-21">import static org.junit.Assert.assertFalse;</span> |
| <span class="source-line-no">022</span><span id="line-22">import static org.junit.Assert.assertNotNull;</span> |
| <span class="source-line-no">023</span><span id="line-23">import static org.junit.Assert.assertNull;</span> |
| <span class="source-line-no">024</span><span id="line-24">import static org.junit.Assert.assertTrue;</span> |
| <span class="source-line-no">025</span><span id="line-25"></span> |
| <span class="source-line-no">026</span><span id="line-26">import java.io.IOException;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.concurrent.Semaphore;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.concurrent.ThreadLocalRandom;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.Abortable;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.HBaseClassTestRule;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.HBaseZKTestingUtil;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.ServerName;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.testclassification.MediumTests;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.testclassification.ZKTests;</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.zookeeper.CreateMode;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.zookeeper.ZooDefs.Ids;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.zookeeper.ZooKeeper;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.junit.AfterClass;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.junit.BeforeClass;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.junit.ClassRule;</span> |
| <span class="source-line-no">044</span><span id="line-44">import org.junit.Test;</span> |
| <span class="source-line-no">045</span><span id="line-45">import org.junit.experimental.categories.Category;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.slf4j.Logger;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">048</span><span id="line-48"></span> |
| <span class="source-line-no">049</span><span id="line-49">@Category({ ZKTests.class, MediumTests.class })</span> |
| <span class="source-line-no">050</span><span id="line-50">public class TestZKNodeTracker {</span> |
| <span class="source-line-no">051</span><span id="line-51"> @ClassRule</span> |
| <span class="source-line-no">052</span><span id="line-52"> public static final HBaseClassTestRule CLASS_RULE =</span> |
| <span class="source-line-no">053</span><span id="line-53"> HBaseClassTestRule.forClass(TestZKNodeTracker.class);</span> |
| <span class="source-line-no">054</span><span id="line-54"></span> |
| <span class="source-line-no">055</span><span id="line-55"> private static final Logger LOG = LoggerFactory.getLogger(TestZKNodeTracker.class);</span> |
| <span class="source-line-no">056</span><span id="line-56"> private final static HBaseZKTestingUtil TEST_UTIL = new HBaseZKTestingUtil();</span> |
| <span class="source-line-no">057</span><span id="line-57"></span> |
| <span class="source-line-no">058</span><span id="line-58"> @BeforeClass</span> |
| <span class="source-line-no">059</span><span id="line-59"> public static void setUpBeforeClass() throws Exception {</span> |
| <span class="source-line-no">060</span><span id="line-60"> TEST_UTIL.startMiniZKCluster();</span> |
| <span class="source-line-no">061</span><span id="line-61"> }</span> |
| <span class="source-line-no">062</span><span id="line-62"></span> |
| <span class="source-line-no">063</span><span id="line-63"> @AfterClass</span> |
| <span class="source-line-no">064</span><span id="line-64"> public static void tearDownAfterClass() throws Exception {</span> |
| <span class="source-line-no">065</span><span id="line-65"> TEST_UTIL.shutdownMiniZKCluster();</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"> /**</span> |
| <span class="source-line-no">069</span><span id="line-69"> * Test that we can interrupt a node that is blocked on a wait.</span> |
| <span class="source-line-no">070</span><span id="line-70"> */</span> |
| <span class="source-line-no">071</span><span id="line-71"> @Test</span> |
| <span class="source-line-no">072</span><span id="line-72"> public void testInterruptible() throws IOException, InterruptedException {</span> |
| <span class="source-line-no">073</span><span id="line-73"> Abortable abortable = new StubAbortable();</span> |
| <span class="source-line-no">074</span><span id="line-74"> ZKWatcher zk = new ZKWatcher(TEST_UTIL.getConfiguration(), "testInterruptible", abortable);</span> |
| <span class="source-line-no">075</span><span id="line-75"> final TestTracker tracker = new TestTracker(zk, "/xyz", abortable);</span> |
| <span class="source-line-no">076</span><span id="line-76"> tracker.start();</span> |
| <span class="source-line-no">077</span><span id="line-77"> Thread t = new Thread(() -> {</span> |
| <span class="source-line-no">078</span><span id="line-78"> try {</span> |
| <span class="source-line-no">079</span><span id="line-79"> tracker.blockUntilAvailable();</span> |
| <span class="source-line-no">080</span><span id="line-80"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">081</span><span id="line-81"> throw new RuntimeException("Interrupted", e);</span> |
| <span class="source-line-no">082</span><span id="line-82"> }</span> |
| <span class="source-line-no">083</span><span id="line-83"> });</span> |
| <span class="source-line-no">084</span><span id="line-84"> t.start();</span> |
| <span class="source-line-no">085</span><span id="line-85"> while (!t.isAlive()) {</span> |
| <span class="source-line-no">086</span><span id="line-86"> Threads.sleep(1);</span> |
| <span class="source-line-no">087</span><span id="line-87"> }</span> |
| <span class="source-line-no">088</span><span id="line-88"> tracker.stop();</span> |
| <span class="source-line-no">089</span><span id="line-89"> t.join();</span> |
| <span class="source-line-no">090</span><span id="line-90"> // If it wasn't interruptible, we'd never get to here.</span> |
| <span class="source-line-no">091</span><span id="line-91"> }</span> |
| <span class="source-line-no">092</span><span id="line-92"></span> |
| <span class="source-line-no">093</span><span id="line-93"> @Test</span> |
| <span class="source-line-no">094</span><span id="line-94"> public void testNodeTracker() throws Exception {</span> |
| <span class="source-line-no">095</span><span id="line-95"> Abortable abortable = new StubAbortable();</span> |
| <span class="source-line-no">096</span><span id="line-96"> ZKWatcher zk = new ZKWatcher(TEST_UTIL.getConfiguration(), "testNodeTracker", abortable);</span> |
| <span class="source-line-no">097</span><span id="line-97"> ZKUtil.createAndFailSilent(zk, zk.getZNodePaths().baseZNode);</span> |
| <span class="source-line-no">098</span><span id="line-98"></span> |
| <span class="source-line-no">099</span><span id="line-99"> final String node = ZNodePaths.joinZNode(zk.getZNodePaths().baseZNode,</span> |
| <span class="source-line-no">100</span><span id="line-100"> Long.toString(ThreadLocalRandom.current().nextLong()));</span> |
| <span class="source-line-no">101</span><span id="line-101"></span> |
| <span class="source-line-no">102</span><span id="line-102"> final byte[] dataOne = Bytes.toBytes("dataOne");</span> |
| <span class="source-line-no">103</span><span id="line-103"> final byte[] dataTwo = Bytes.toBytes("dataTwo");</span> |
| <span class="source-line-no">104</span><span id="line-104"></span> |
| <span class="source-line-no">105</span><span id="line-105"> // Start a ZKNT with no node currently available</span> |
| <span class="source-line-no">106</span><span id="line-106"> TestTracker localTracker = new TestTracker(zk, node, abortable);</span> |
| <span class="source-line-no">107</span><span id="line-107"> localTracker.start();</span> |
| <span class="source-line-no">108</span><span id="line-108"> zk.registerListener(localTracker);</span> |
| <span class="source-line-no">109</span><span id="line-109"></span> |
| <span class="source-line-no">110</span><span id="line-110"> // Make sure we don't have a node</span> |
| <span class="source-line-no">111</span><span id="line-111"> assertNull(localTracker.getData(false));</span> |
| <span class="source-line-no">112</span><span id="line-112"></span> |
| <span class="source-line-no">113</span><span id="line-113"> // Spin up a thread with another ZKNT and have it block</span> |
| <span class="source-line-no">114</span><span id="line-114"> WaitToGetDataThread thread = new WaitToGetDataThread(zk, node);</span> |
| <span class="source-line-no">115</span><span id="line-115"> thread.start();</span> |
| <span class="source-line-no">116</span><span id="line-116"></span> |
| <span class="source-line-no">117</span><span id="line-117"> // Verify the thread doesn't have a node</span> |
| <span class="source-line-no">118</span><span id="line-118"> assertFalse(thread.hasData);</span> |
| <span class="source-line-no">119</span><span id="line-119"></span> |
| <span class="source-line-no">120</span><span id="line-120"> // Now, start a new ZKNT with the node already available</span> |
| <span class="source-line-no">121</span><span id="line-121"> TestTracker secondTracker = new TestTracker(zk, node, null);</span> |
| <span class="source-line-no">122</span><span id="line-122"> secondTracker.start();</span> |
| <span class="source-line-no">123</span><span id="line-123"> zk.registerListener(secondTracker);</span> |
| <span class="source-line-no">124</span><span id="line-124"></span> |
| <span class="source-line-no">125</span><span id="line-125"> // Put up an additional zk listener so we know when zk event is done</span> |
| <span class="source-line-no">126</span><span id="line-126"> TestingZKListener zkListener = new TestingZKListener(zk, node);</span> |
| <span class="source-line-no">127</span><span id="line-127"> zk.registerListener(zkListener);</span> |
| <span class="source-line-no">128</span><span id="line-128"> assertEquals(0, zkListener.createdLock.availablePermits());</span> |
| <span class="source-line-no">129</span><span id="line-129"></span> |
| <span class="source-line-no">130</span><span id="line-130"> // Create a completely separate zk connection for test triggers and avoid</span> |
| <span class="source-line-no">131</span><span id="line-131"> // any weird watcher interactions from the test</span> |
| <span class="source-line-no">132</span><span id="line-132"> final ZooKeeper zkconn = ZooKeeperHelper.getConnectedZooKeeper(</span> |
| <span class="source-line-no">133</span><span id="line-133"> ZKConfig.getZKQuorumServersString(TEST_UTIL.getConfiguration()), 60000);</span> |
| <span class="source-line-no">134</span><span id="line-134"></span> |
| <span class="source-line-no">135</span><span id="line-135"> // Add the node with data one</span> |
| <span class="source-line-no">136</span><span id="line-136"> zkconn.create(node, dataOne, Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);</span> |
| <span class="source-line-no">137</span><span id="line-137"></span> |
| <span class="source-line-no">138</span><span id="line-138"> // Wait for the zk event to be processed</span> |
| <span class="source-line-no">139</span><span id="line-139"> zkListener.waitForCreation();</span> |
| <span class="source-line-no">140</span><span id="line-140"> thread.join();</span> |
| <span class="source-line-no">141</span><span id="line-141"></span> |
| <span class="source-line-no">142</span><span id="line-142"> // Both trackers should have the node available with data one</span> |
| <span class="source-line-no">143</span><span id="line-143"> assertNotNull(localTracker.getData(false));</span> |
| <span class="source-line-no">144</span><span id="line-144"> assertNotNull(localTracker.blockUntilAvailable());</span> |
| <span class="source-line-no">145</span><span id="line-145"> assertTrue(Bytes.equals(localTracker.getData(false), dataOne));</span> |
| <span class="source-line-no">146</span><span id="line-146"> assertTrue(thread.hasData);</span> |
| <span class="source-line-no">147</span><span id="line-147"> assertTrue(Bytes.equals(thread.tracker.getData(false), dataOne));</span> |
| <span class="source-line-no">148</span><span id="line-148"> LOG.info("Successfully got data one");</span> |
| <span class="source-line-no">149</span><span id="line-149"></span> |
| <span class="source-line-no">150</span><span id="line-150"> // Make sure it's available and with the expected data</span> |
| <span class="source-line-no">151</span><span id="line-151"> assertNotNull(secondTracker.getData(false));</span> |
| <span class="source-line-no">152</span><span id="line-152"> assertNotNull(secondTracker.blockUntilAvailable());</span> |
| <span class="source-line-no">153</span><span id="line-153"> assertTrue(Bytes.equals(secondTracker.getData(false), dataOne));</span> |
| <span class="source-line-no">154</span><span id="line-154"> LOG.info("Successfully got data one with the second tracker");</span> |
| <span class="source-line-no">155</span><span id="line-155"></span> |
| <span class="source-line-no">156</span><span id="line-156"> // Drop the node</span> |
| <span class="source-line-no">157</span><span id="line-157"> zkconn.delete(node, -1);</span> |
| <span class="source-line-no">158</span><span id="line-158"> zkListener.waitForDeletion();</span> |
| <span class="source-line-no">159</span><span id="line-159"></span> |
| <span class="source-line-no">160</span><span id="line-160"> // Create a new thread but with the existing thread's tracker to wait</span> |
| <span class="source-line-no">161</span><span id="line-161"> TestTracker threadTracker = thread.tracker;</span> |
| <span class="source-line-no">162</span><span id="line-162"> thread = new WaitToGetDataThread(threadTracker);</span> |
| <span class="source-line-no">163</span><span id="line-163"> thread.start();</span> |
| <span class="source-line-no">164</span><span id="line-164"></span> |
| <span class="source-line-no">165</span><span id="line-165"> // Verify other guys don't have data</span> |
| <span class="source-line-no">166</span><span id="line-166"> assertFalse(thread.hasData);</span> |
| <span class="source-line-no">167</span><span id="line-167"> assertNull(secondTracker.getData(false));</span> |
| <span class="source-line-no">168</span><span id="line-168"> assertNull(localTracker.getData(false));</span> |
| <span class="source-line-no">169</span><span id="line-169"> LOG.info("Successfully made unavailable");</span> |
| <span class="source-line-no">170</span><span id="line-170"></span> |
| <span class="source-line-no">171</span><span id="line-171"> // Create with second data</span> |
| <span class="source-line-no">172</span><span id="line-172"> zkconn.create(node, dataTwo, Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);</span> |
| <span class="source-line-no">173</span><span id="line-173"></span> |
| <span class="source-line-no">174</span><span id="line-174"> // Wait for the zk event to be processed</span> |
| <span class="source-line-no">175</span><span id="line-175"> zkListener.waitForCreation();</span> |
| <span class="source-line-no">176</span><span id="line-176"> thread.join();</span> |
| <span class="source-line-no">177</span><span id="line-177"></span> |
| <span class="source-line-no">178</span><span id="line-178"> // All trackers should have the node available with data two</span> |
| <span class="source-line-no">179</span><span id="line-179"> assertNotNull(localTracker.getData(false));</span> |
| <span class="source-line-no">180</span><span id="line-180"> assertNotNull(localTracker.blockUntilAvailable());</span> |
| <span class="source-line-no">181</span><span id="line-181"> assertTrue(Bytes.equals(localTracker.getData(false), dataTwo));</span> |
| <span class="source-line-no">182</span><span id="line-182"> assertNotNull(secondTracker.getData(false));</span> |
| <span class="source-line-no">183</span><span id="line-183"> assertNotNull(secondTracker.blockUntilAvailable());</span> |
| <span class="source-line-no">184</span><span id="line-184"> assertTrue(Bytes.equals(secondTracker.getData(false), dataTwo));</span> |
| <span class="source-line-no">185</span><span id="line-185"> assertTrue(thread.hasData);</span> |
| <span class="source-line-no">186</span><span id="line-186"> assertTrue(Bytes.equals(thread.tracker.getData(false), dataTwo));</span> |
| <span class="source-line-no">187</span><span id="line-187"> LOG.info("Successfully got data two on all trackers and threads");</span> |
| <span class="source-line-no">188</span><span id="line-188"></span> |
| <span class="source-line-no">189</span><span id="line-189"> // Change the data back to data one</span> |
| <span class="source-line-no">190</span><span id="line-190"> zkconn.setData(node, dataOne, -1);</span> |
| <span class="source-line-no">191</span><span id="line-191"></span> |
| <span class="source-line-no">192</span><span id="line-192"> // Wait for zk event to be processed</span> |
| <span class="source-line-no">193</span><span id="line-193"> zkListener.waitForDataChange();</span> |
| <span class="source-line-no">194</span><span id="line-194"></span> |
| <span class="source-line-no">195</span><span id="line-195"> // All trackers should have the node available with data one</span> |
| <span class="source-line-no">196</span><span id="line-196"> assertNotNull(localTracker.getData(false));</span> |
| <span class="source-line-no">197</span><span id="line-197"> assertNotNull(localTracker.blockUntilAvailable());</span> |
| <span class="source-line-no">198</span><span id="line-198"> assertTrue(Bytes.equals(localTracker.getData(false), dataOne));</span> |
| <span class="source-line-no">199</span><span id="line-199"> assertNotNull(secondTracker.getData(false));</span> |
| <span class="source-line-no">200</span><span id="line-200"> assertNotNull(secondTracker.blockUntilAvailable());</span> |
| <span class="source-line-no">201</span><span id="line-201"> assertTrue(Bytes.equals(secondTracker.getData(false), dataOne));</span> |
| <span class="source-line-no">202</span><span id="line-202"> assertTrue(thread.hasData);</span> |
| <span class="source-line-no">203</span><span id="line-203"> assertTrue(Bytes.equals(thread.tracker.getData(false), dataOne));</span> |
| <span class="source-line-no">204</span><span id="line-204"> LOG.info("Successfully got data one following a data change on all trackers and threads");</span> |
| <span class="source-line-no">205</span><span id="line-205"> }</span> |
| <span class="source-line-no">206</span><span id="line-206"></span> |
| <span class="source-line-no">207</span><span id="line-207"> public static class WaitToGetDataThread extends Thread {</span> |
| <span class="source-line-no">208</span><span id="line-208"> TestTracker tracker;</span> |
| <span class="source-line-no">209</span><span id="line-209"> boolean hasData;</span> |
| <span class="source-line-no">210</span><span id="line-210"></span> |
| <span class="source-line-no">211</span><span id="line-211"> WaitToGetDataThread(ZKWatcher zk, String node) {</span> |
| <span class="source-line-no">212</span><span id="line-212"> tracker = new TestTracker(zk, node, null);</span> |
| <span class="source-line-no">213</span><span id="line-213"> tracker.start();</span> |
| <span class="source-line-no">214</span><span id="line-214"> zk.registerListener(tracker);</span> |
| <span class="source-line-no">215</span><span id="line-215"> hasData = false;</span> |
| <span class="source-line-no">216</span><span id="line-216"> }</span> |
| <span class="source-line-no">217</span><span id="line-217"></span> |
| <span class="source-line-no">218</span><span id="line-218"> WaitToGetDataThread(TestTracker tracker) {</span> |
| <span class="source-line-no">219</span><span id="line-219"> this.tracker = tracker;</span> |
| <span class="source-line-no">220</span><span id="line-220"> hasData = false;</span> |
| <span class="source-line-no">221</span><span id="line-221"> }</span> |
| <span class="source-line-no">222</span><span id="line-222"></span> |
| <span class="source-line-no">223</span><span id="line-223"> @Override</span> |
| <span class="source-line-no">224</span><span id="line-224"> public void run() {</span> |
| <span class="source-line-no">225</span><span id="line-225"> LOG.info("Waiting for data to be available in WaitToGetDataThread");</span> |
| <span class="source-line-no">226</span><span id="line-226"> try {</span> |
| <span class="source-line-no">227</span><span id="line-227"> tracker.blockUntilAvailable();</span> |
| <span class="source-line-no">228</span><span id="line-228"> } catch (InterruptedException e) {</span> |
| <span class="source-line-no">229</span><span id="line-229"> e.printStackTrace();</span> |
| <span class="source-line-no">230</span><span id="line-230"> }</span> |
| <span class="source-line-no">231</span><span id="line-231"> LOG.info("Data now available in tracker from WaitToGetDataThread");</span> |
| <span class="source-line-no">232</span><span id="line-232"> hasData = true;</span> |
| <span class="source-line-no">233</span><span id="line-233"> }</span> |
| <span class="source-line-no">234</span><span id="line-234"> }</span> |
| <span class="source-line-no">235</span><span id="line-235"></span> |
| <span class="source-line-no">236</span><span id="line-236"> public static class TestTracker extends ZKNodeTracker {</span> |
| <span class="source-line-no">237</span><span id="line-237"> TestTracker(ZKWatcher watcher, String node, Abortable abortable) {</span> |
| <span class="source-line-no">238</span><span id="line-238"> super(watcher, node, abortable);</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"></span> |
| <span class="source-line-no">242</span><span id="line-242"> public static class TestingZKListener extends ZKListener {</span> |
| <span class="source-line-no">243</span><span id="line-243"> private static final Logger LOG = LoggerFactory.getLogger(TestingZKListener.class);</span> |
| <span class="source-line-no">244</span><span id="line-244"></span> |
| <span class="source-line-no">245</span><span id="line-245"> private Semaphore deletedLock;</span> |
| <span class="source-line-no">246</span><span id="line-246"> private Semaphore createdLock;</span> |
| <span class="source-line-no">247</span><span id="line-247"> private Semaphore changedLock;</span> |
| <span class="source-line-no">248</span><span id="line-248"> private String node;</span> |
| <span class="source-line-no">249</span><span id="line-249"></span> |
| <span class="source-line-no">250</span><span id="line-250"> TestingZKListener(ZKWatcher watcher, String node) {</span> |
| <span class="source-line-no">251</span><span id="line-251"> super(watcher);</span> |
| <span class="source-line-no">252</span><span id="line-252"> deletedLock = new Semaphore(0);</span> |
| <span class="source-line-no">253</span><span id="line-253"> createdLock = new Semaphore(0);</span> |
| <span class="source-line-no">254</span><span id="line-254"> changedLock = new Semaphore(0);</span> |
| <span class="source-line-no">255</span><span id="line-255"> this.node = node;</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"> @Override</span> |
| <span class="source-line-no">259</span><span id="line-259"> public void nodeDeleted(String path) {</span> |
| <span class="source-line-no">260</span><span id="line-260"> if (path.equals(node)) {</span> |
| <span class="source-line-no">261</span><span id="line-261"> LOG.debug("nodeDeleted(" + path + ")");</span> |
| <span class="source-line-no">262</span><span id="line-262"> deletedLock.release();</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> |
| <span class="source-line-no">265</span><span id="line-265"></span> |
| <span class="source-line-no">266</span><span id="line-266"> @Override</span> |
| <span class="source-line-no">267</span><span id="line-267"> public void nodeCreated(String path) {</span> |
| <span class="source-line-no">268</span><span id="line-268"> if (path.equals(node)) {</span> |
| <span class="source-line-no">269</span><span id="line-269"> LOG.debug("nodeCreated(" + path + ")");</span> |
| <span class="source-line-no">270</span><span id="line-270"> createdLock.release();</span> |
| <span class="source-line-no">271</span><span id="line-271"> }</span> |
| <span class="source-line-no">272</span><span id="line-272"> }</span> |
| <span class="source-line-no">273</span><span id="line-273"></span> |
| <span class="source-line-no">274</span><span id="line-274"> @Override</span> |
| <span class="source-line-no">275</span><span id="line-275"> public void nodeDataChanged(String path) {</span> |
| <span class="source-line-no">276</span><span id="line-276"> if (path.equals(node)) {</span> |
| <span class="source-line-no">277</span><span id="line-277"> LOG.debug("nodeDataChanged(" + path + ")");</span> |
| <span class="source-line-no">278</span><span id="line-278"> changedLock.release();</span> |
| <span class="source-line-no">279</span><span id="line-279"> }</span> |
| <span class="source-line-no">280</span><span id="line-280"> }</span> |
| <span class="source-line-no">281</span><span id="line-281"></span> |
| <span class="source-line-no">282</span><span id="line-282"> void waitForDeletion() throws InterruptedException {</span> |
| <span class="source-line-no">283</span><span id="line-283"> deletedLock.acquire();</span> |
| <span class="source-line-no">284</span><span id="line-284"> }</span> |
| <span class="source-line-no">285</span><span id="line-285"></span> |
| <span class="source-line-no">286</span><span id="line-286"> void waitForCreation() throws InterruptedException {</span> |
| <span class="source-line-no">287</span><span id="line-287"> createdLock.acquire();</span> |
| <span class="source-line-no">288</span><span id="line-288"> }</span> |
| <span class="source-line-no">289</span><span id="line-289"></span> |
| <span class="source-line-no">290</span><span id="line-290"> void waitForDataChange() throws InterruptedException {</span> |
| <span class="source-line-no">291</span><span id="line-291"> changedLock.acquire();</span> |
| <span class="source-line-no">292</span><span id="line-292"> }</span> |
| <span class="source-line-no">293</span><span id="line-293"> }</span> |
| <span class="source-line-no">294</span><span id="line-294"></span> |
| <span class="source-line-no">295</span><span id="line-295"> public static class StubAbortable implements Abortable {</span> |
| <span class="source-line-no">296</span><span id="line-296"> @Override</span> |
| <span class="source-line-no">297</span><span id="line-297"> public void abort(final String msg, final Throwable t) {</span> |
| <span class="source-line-no">298</span><span id="line-298"> }</span> |
| <span class="source-line-no">299</span><span id="line-299"></span> |
| <span class="source-line-no">300</span><span id="line-300"> @Override</span> |
| <span class="source-line-no">301</span><span id="line-301"> public boolean isAborted() {</span> |
| <span class="source-line-no">302</span><span id="line-302"> return false;</span> |
| <span class="source-line-no">303</span><span id="line-303"> }</span> |
| <span class="source-line-no">304</span><span id="line-304"> }</span> |
| <span class="source-line-no">305</span><span id="line-305"></span> |
| <span class="source-line-no">306</span><span id="line-306"> @Test</span> |
| <span class="source-line-no">307</span><span id="line-307"> public void testCleanZNode() throws Exception {</span> |
| <span class="source-line-no">308</span><span id="line-308"> ZKWatcher zkw = new ZKWatcher(TEST_UTIL.getConfiguration(), "testNodeTracker",</span> |
| <span class="source-line-no">309</span><span id="line-309"> new TestZKNodeTracker.StubAbortable());</span> |
| <span class="source-line-no">310</span><span id="line-310"></span> |
| <span class="source-line-no">311</span><span id="line-311"> final ServerName sn = ServerName.valueOf("127.0.0.1:52", 45L);</span> |
| <span class="source-line-no">312</span><span id="line-312"></span> |
| <span class="source-line-no">313</span><span id="line-313"> ZKUtil.createAndFailSilent(zkw, TEST_UTIL.getConfiguration()</span> |
| <span class="source-line-no">314</span><span id="line-314"> .get(HConstants.ZOOKEEPER_ZNODE_PARENT, HConstants.DEFAULT_ZOOKEEPER_ZNODE_PARENT));</span> |
| <span class="source-line-no">315</span><span id="line-315"></span> |
| <span class="source-line-no">316</span><span id="line-316"> final String nodeName = zkw.getZNodePaths().masterAddressZNode;</span> |
| <span class="source-line-no">317</span><span id="line-317"></span> |
| <span class="source-line-no">318</span><span id="line-318"> // Check that we manage the case when there is no data</span> |
| <span class="source-line-no">319</span><span id="line-319"> ZKUtil.createAndFailSilent(zkw, nodeName);</span> |
| <span class="source-line-no">320</span><span id="line-320"> MasterAddressTracker.deleteIfEquals(zkw, sn.toString());</span> |
| <span class="source-line-no">321</span><span id="line-321"> assertNotNull(ZKUtil.getData(zkw, nodeName));</span> |
| <span class="source-line-no">322</span><span id="line-322"></span> |
| <span class="source-line-no">323</span><span id="line-323"> // Check that we don't delete if we're not supposed to</span> |
| <span class="source-line-no">324</span><span id="line-324"> ZKUtil.setData(zkw, nodeName, MasterAddressTracker.toByteArray(sn, 0));</span> |
| <span class="source-line-no">325</span><span id="line-325"> MasterAddressTracker.deleteIfEquals(zkw, ServerName.valueOf("127.0.0.2:52", 45L).toString());</span> |
| <span class="source-line-no">326</span><span id="line-326"> assertNotNull(ZKUtil.getData(zkw, nodeName));</span> |
| <span class="source-line-no">327</span><span id="line-327"></span> |
| <span class="source-line-no">328</span><span id="line-328"> // Check that we delete when we're supposed to</span> |
| <span class="source-line-no">329</span><span id="line-329"> ZKUtil.setData(zkw, nodeName, MasterAddressTracker.toByteArray(sn, 0));</span> |
| <span class="source-line-no">330</span><span id="line-330"> MasterAddressTracker.deleteIfEquals(zkw, sn.toString());</span> |
| <span class="source-line-no">331</span><span id="line-331"> assertNull(ZKUtil.getData(zkw, nodeName));</span> |
| <span class="source-line-no">332</span><span id="line-332"></span> |
| <span class="source-line-no">333</span><span id="line-333"> // Check that we support the case when the znode does not exist</span> |
| <span class="source-line-no">334</span><span id="line-334"> MasterAddressTracker.deleteIfEquals(zkw, sn.toString()); // must not throw an exception</span> |
| <span class="source-line-no">335</span><span id="line-335"> }</span> |
| <span class="source-line-no">336</span><span id="line-336">}</span> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
