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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.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.hamcrest.CoreMatchers.instanceOf;</span> |
| <span class="source-line-no">021</span><span id="line-21">import static org.hamcrest.MatcherAssert.assertThat;</span> |
| <span class="source-line-no">022</span><span id="line-22">import static org.junit.Assert.assertArrayEquals;</span> |
| <span class="source-line-no">023</span><span id="line-23">import static org.junit.Assert.assertEquals;</span> |
| <span class="source-line-no">024</span><span id="line-24">import static org.junit.Assert.assertNotEquals;</span> |
| <span class="source-line-no">025</span><span id="line-25">import static org.junit.Assert.assertNotNull;</span> |
| <span class="source-line-no">026</span><span id="line-26">import static org.junit.Assert.assertNotSame;</span> |
| <span class="source-line-no">027</span><span id="line-27">import static org.junit.Assert.assertNull;</span> |
| <span class="source-line-no">028</span><span id="line-28">import static org.junit.Assert.assertSame;</span> |
| <span class="source-line-no">029</span><span id="line-29">import static org.junit.Assert.fail;</span> |
| <span class="source-line-no">030</span><span id="line-30">import static org.mockito.ArgumentMatchers.any;</span> |
| <span class="source-line-no">031</span><span id="line-31">import static org.mockito.ArgumentMatchers.anyBoolean;</span> |
| <span class="source-line-no">032</span><span id="line-32">import static org.mockito.ArgumentMatchers.anyString;</span> |
| <span class="source-line-no">033</span><span id="line-33">import static org.mockito.Mockito.doAnswer;</span> |
| <span class="source-line-no">034</span><span id="line-34">import static org.mockito.Mockito.mock;</span> |
| <span class="source-line-no">035</span><span id="line-35">import static org.mockito.Mockito.never;</span> |
| <span class="source-line-no">036</span><span id="line-36">import static org.mockito.Mockito.times;</span> |
| <span class="source-line-no">037</span><span id="line-37">import static org.mockito.Mockito.verify;</span> |
| <span class="source-line-no">038</span><span id="line-38">import static org.mockito.Mockito.when;</span> |
| <span class="source-line-no">039</span><span id="line-39"></span> |
| <span class="source-line-no">040</span><span id="line-40">import java.io.IOException;</span> |
| <span class="source-line-no">041</span><span id="line-41">import java.util.Collections;</span> |
| <span class="source-line-no">042</span><span id="line-42">import java.util.List;</span> |
| <span class="source-line-no">043</span><span id="line-43">import java.util.concurrent.CompletableFuture;</span> |
| <span class="source-line-no">044</span><span id="line-44">import java.util.concurrent.Exchanger;</span> |
| <span class="source-line-no">045</span><span id="line-45">import java.util.concurrent.ExecutionException;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.apache.hadoop.hbase.HBaseClassTestRule;</span> |
| <span class="source-line-no">048</span><span id="line-48">import org.apache.hadoop.hbase.HBaseZKTestingUtil;</span> |
| <span class="source-line-no">049</span><span id="line-49">import org.apache.hadoop.hbase.HConstants;</span> |
| <span class="source-line-no">050</span><span id="line-50">import org.apache.hadoop.hbase.Waiter.ExplainingPredicate;</span> |
| <span class="source-line-no">051</span><span id="line-51">import org.apache.hadoop.hbase.testclassification.MediumTests;</span> |
| <span class="source-line-no">052</span><span id="line-52">import org.apache.hadoop.hbase.testclassification.ZKTests;</span> |
| <span class="source-line-no">053</span><span id="line-53">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">054</span><span id="line-54">import org.apache.zookeeper.AsyncCallback;</span> |
| <span class="source-line-no">055</span><span id="line-55">import org.apache.zookeeper.CreateMode;</span> |
| <span class="source-line-no">056</span><span id="line-56">import org.apache.zookeeper.KeeperException;</span> |
| <span class="source-line-no">057</span><span id="line-57">import org.apache.zookeeper.KeeperException.Code;</span> |
| <span class="source-line-no">058</span><span id="line-58">import org.apache.zookeeper.ZooDefs;</span> |
| <span class="source-line-no">059</span><span id="line-59">import org.apache.zookeeper.ZooKeeper;</span> |
| <span class="source-line-no">060</span><span id="line-60">import org.junit.AfterClass;</span> |
| <span class="source-line-no">061</span><span id="line-61">import org.junit.BeforeClass;</span> |
| <span class="source-line-no">062</span><span id="line-62">import org.junit.ClassRule;</span> |
| <span class="source-line-no">063</span><span id="line-63">import org.junit.Test;</span> |
| <span class="source-line-no">064</span><span id="line-64">import org.junit.experimental.categories.Category;</span> |
| <span class="source-line-no">065</span><span id="line-65"></span> |
| <span class="source-line-no">066</span><span id="line-66">@Category({ ZKTests.class, MediumTests.class })</span> |
| <span class="source-line-no">067</span><span id="line-67">public class TestReadOnlyZKClient {</span> |
| <span class="source-line-no">068</span><span id="line-68"></span> |
| <span class="source-line-no">069</span><span id="line-69"> @ClassRule</span> |
| <span class="source-line-no">070</span><span id="line-70"> public static final HBaseClassTestRule CLASS_RULE =</span> |
| <span class="source-line-no">071</span><span id="line-71"> HBaseClassTestRule.forClass(TestReadOnlyZKClient.class);</span> |
| <span class="source-line-no">072</span><span id="line-72"></span> |
| <span class="source-line-no">073</span><span id="line-73"> private static HBaseZKTestingUtil UTIL = new HBaseZKTestingUtil();</span> |
| <span class="source-line-no">074</span><span id="line-74"></span> |
| <span class="source-line-no">075</span><span id="line-75"> private static String PATH = "/test";</span> |
| <span class="source-line-no">076</span><span id="line-76"></span> |
| <span class="source-line-no">077</span><span id="line-77"> private static byte[] DATA;</span> |
| <span class="source-line-no">078</span><span id="line-78"></span> |
| <span class="source-line-no">079</span><span id="line-79"> private static int CHILDREN = 5;</span> |
| <span class="source-line-no">080</span><span id="line-80"></span> |
| <span class="source-line-no">081</span><span id="line-81"> private static ReadOnlyZKClient RO_ZK;</span> |
| <span class="source-line-no">082</span><span id="line-82"></span> |
| <span class="source-line-no">083</span><span id="line-83"> @BeforeClass</span> |
| <span class="source-line-no">084</span><span id="line-84"> public static void setUp() throws Exception {</span> |
| <span class="source-line-no">085</span><span id="line-85"> final int port = UTIL.startMiniZKCluster().getClientPort();</span> |
| <span class="source-line-no">086</span><span id="line-86"> String hostPort = UTIL.getZkCluster().getAddress().toString();</span> |
| <span class="source-line-no">087</span><span id="line-87"></span> |
| <span class="source-line-no">088</span><span id="line-88"> ZooKeeper zk = ZooKeeperHelper.getConnectedZooKeeper(hostPort, 10000);</span> |
| <span class="source-line-no">089</span><span id="line-89"> DATA = new byte[10];</span> |
| <span class="source-line-no">090</span><span id="line-90"> Bytes.random(DATA);</span> |
| <span class="source-line-no">091</span><span id="line-91"> zk.create(PATH, DATA, ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);</span> |
| <span class="source-line-no">092</span><span id="line-92"> for (int i = 0; i < CHILDREN; i++) {</span> |
| <span class="source-line-no">093</span><span id="line-93"> zk.create(PATH + "/c" + i, new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);</span> |
| <span class="source-line-no">094</span><span id="line-94"> }</span> |
| <span class="source-line-no">095</span><span id="line-95"> zk.close();</span> |
| <span class="source-line-no">096</span><span id="line-96"> Configuration conf = UTIL.getConfiguration();</span> |
| <span class="source-line-no">097</span><span id="line-97"> conf.set(HConstants.ZOOKEEPER_QUORUM, hostPort);</span> |
| <span class="source-line-no">098</span><span id="line-98"> conf.setInt(ReadOnlyZKClient.RECOVERY_RETRY, 3);</span> |
| <span class="source-line-no">099</span><span id="line-99"> conf.setInt(ReadOnlyZKClient.RECOVERY_RETRY_INTERVAL_MILLIS, 100);</span> |
| <span class="source-line-no">100</span><span id="line-100"> conf.setInt(ReadOnlyZKClient.KEEPALIVE_MILLIS, 3000);</span> |
| <span class="source-line-no">101</span><span id="line-101"> RO_ZK = new ReadOnlyZKClient(conf);</span> |
| <span class="source-line-no">102</span><span id="line-102"> // only connect when necessary</span> |
| <span class="source-line-no">103</span><span id="line-103"> assertNull(RO_ZK.zookeeper);</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"> @AfterClass</span> |
| <span class="source-line-no">107</span><span id="line-107"> public static void tearDown() throws IOException {</span> |
| <span class="source-line-no">108</span><span id="line-108"> RO_ZK.close();</span> |
| <span class="source-line-no">109</span><span id="line-109"> UTIL.shutdownMiniZKCluster();</span> |
| <span class="source-line-no">110</span><span id="line-110"> UTIL.cleanupTestDir();</span> |
| <span class="source-line-no">111</span><span id="line-111"> }</span> |
| <span class="source-line-no">112</span><span id="line-112"></span> |
| <span class="source-line-no">113</span><span id="line-113"> private void waitForIdleConnectionClosed() throws Exception {</span> |
| <span class="source-line-no">114</span><span id="line-114"> // The zookeeper client should be closed finally after the keep alive time elapsed</span> |
| <span class="source-line-no">115</span><span id="line-115"> UTIL.waitFor(10000, new ExplainingPredicate<Exception>() {</span> |
| <span class="source-line-no">116</span><span id="line-116"></span> |
| <span class="source-line-no">117</span><span id="line-117"> @Override</span> |
| <span class="source-line-no">118</span><span id="line-118"> public boolean evaluate() {</span> |
| <span class="source-line-no">119</span><span id="line-119"> return RO_ZK.zookeeper == null;</span> |
| <span class="source-line-no">120</span><span id="line-120"> }</span> |
| <span class="source-line-no">121</span><span id="line-121"></span> |
| <span class="source-line-no">122</span><span id="line-122"> @Override</span> |
| <span class="source-line-no">123</span><span id="line-123"> public String explainFailure() {</span> |
| <span class="source-line-no">124</span><span id="line-124"> return "Connection to zookeeper is still alive";</span> |
| <span class="source-line-no">125</span><span id="line-125"> }</span> |
| <span class="source-line-no">126</span><span id="line-126"> });</span> |
| <span class="source-line-no">127</span><span id="line-127"> }</span> |
| <span class="source-line-no">128</span><span id="line-128"></span> |
| <span class="source-line-no">129</span><span id="line-129"> @Test</span> |
| <span class="source-line-no">130</span><span id="line-130"> public void testRead() throws Exception {</span> |
| <span class="source-line-no">131</span><span id="line-131"> assertArrayEquals(DATA, RO_ZK.get(PATH).get());</span> |
| <span class="source-line-no">132</span><span id="line-132"> assertEquals(CHILDREN, RO_ZK.exists(PATH).get().getNumChildren());</span> |
| <span class="source-line-no">133</span><span id="line-133"> List<String> children = RO_ZK.list(PATH).get();</span> |
| <span class="source-line-no">134</span><span id="line-134"> assertEquals(CHILDREN, children.size());</span> |
| <span class="source-line-no">135</span><span id="line-135"> Collections.sort(children);</span> |
| <span class="source-line-no">136</span><span id="line-136"> for (int i = 0; i < CHILDREN; i++) {</span> |
| <span class="source-line-no">137</span><span id="line-137"> assertEquals("c" + i, children.get(i));</span> |
| <span class="source-line-no">138</span><span id="line-138"> }</span> |
| <span class="source-line-no">139</span><span id="line-139"> assertNotNull(RO_ZK.zookeeper);</span> |
| <span class="source-line-no">140</span><span id="line-140"> waitForIdleConnectionClosed();</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"> @Test</span> |
| <span class="source-line-no">144</span><span id="line-144"> public void testNoNode() throws InterruptedException, ExecutionException {</span> |
| <span class="source-line-no">145</span><span id="line-145"> String pathNotExists = PATH + "_whatever";</span> |
| <span class="source-line-no">146</span><span id="line-146"> try {</span> |
| <span class="source-line-no">147</span><span id="line-147"> RO_ZK.get(pathNotExists).get();</span> |
| <span class="source-line-no">148</span><span id="line-148"> fail("should fail because of " + pathNotExists + " does not exist");</span> |
| <span class="source-line-no">149</span><span id="line-149"> } catch (ExecutionException e) {</span> |
| <span class="source-line-no">150</span><span id="line-150"> assertThat(e.getCause(), instanceOf(KeeperException.class));</span> |
| <span class="source-line-no">151</span><span id="line-151"> KeeperException ke = (KeeperException) e.getCause();</span> |
| <span class="source-line-no">152</span><span id="line-152"> assertEquals(Code.NONODE, ke.code());</span> |
| <span class="source-line-no">153</span><span id="line-153"> assertEquals(pathNotExists, ke.getPath());</span> |
| <span class="source-line-no">154</span><span id="line-154"> }</span> |
| <span class="source-line-no">155</span><span id="line-155"> try {</span> |
| <span class="source-line-no">156</span><span id="line-156"> RO_ZK.list(pathNotExists).get();</span> |
| <span class="source-line-no">157</span><span id="line-157"> fail("should fail because of " + pathNotExists + " does not exist");</span> |
| <span class="source-line-no">158</span><span id="line-158"> } catch (ExecutionException e) {</span> |
| <span class="source-line-no">159</span><span id="line-159"> assertThat(e.getCause(), instanceOf(KeeperException.class));</span> |
| <span class="source-line-no">160</span><span id="line-160"> KeeperException ke = (KeeperException) e.getCause();</span> |
| <span class="source-line-no">161</span><span id="line-161"> assertEquals(Code.NONODE, ke.code());</span> |
| <span class="source-line-no">162</span><span id="line-162"> assertEquals(pathNotExists, ke.getPath());</span> |
| <span class="source-line-no">163</span><span id="line-163"> }</span> |
| <span class="source-line-no">164</span><span id="line-164"> // exists will not throw exception.</span> |
| <span class="source-line-no">165</span><span id="line-165"> assertNull(RO_ZK.exists(pathNotExists).get());</span> |
| <span class="source-line-no">166</span><span id="line-166"> }</span> |
| <span class="source-line-no">167</span><span id="line-167"></span> |
| <span class="source-line-no">168</span><span id="line-168"> @Test</span> |
| <span class="source-line-no">169</span><span id="line-169"> public void testSessionExpire() throws Exception {</span> |
| <span class="source-line-no">170</span><span id="line-170"> assertArrayEquals(DATA, RO_ZK.get(PATH).get());</span> |
| <span class="source-line-no">171</span><span id="line-171"> ZooKeeper zk = RO_ZK.zookeeper;</span> |
| <span class="source-line-no">172</span><span id="line-172"> long sessionId = zk.getSessionId();</span> |
| <span class="source-line-no">173</span><span id="line-173"> UTIL.getZkCluster().getZooKeeperServers().get(0).closeSession(sessionId);</span> |
| <span class="source-line-no">174</span><span id="line-174"> // should not reach keep alive so still the same instance</span> |
| <span class="source-line-no">175</span><span id="line-175"> assertSame(zk, RO_ZK.zookeeper);</span> |
| <span class="source-line-no">176</span><span id="line-176"> byte[] got = RO_ZK.get(PATH).get();</span> |
| <span class="source-line-no">177</span><span id="line-177"> assertArrayEquals(DATA, got);</span> |
| <span class="source-line-no">178</span><span id="line-178"> assertNotNull(RO_ZK.zookeeper);</span> |
| <span class="source-line-no">179</span><span id="line-179"> assertNotSame(zk, RO_ZK.zookeeper);</span> |
| <span class="source-line-no">180</span><span id="line-180"> assertNotEquals(sessionId, RO_ZK.zookeeper.getSessionId());</span> |
| <span class="source-line-no">181</span><span id="line-181"> }</span> |
| <span class="source-line-no">182</span><span id="line-182"></span> |
| <span class="source-line-no">183</span><span id="line-183"> @Test</span> |
| <span class="source-line-no">184</span><span id="line-184"> public void testNotCloseZkWhenPending() throws Exception {</span> |
| <span class="source-line-no">185</span><span id="line-185"> ZooKeeper mockedZK = mock(ZooKeeper.class);</span> |
| <span class="source-line-no">186</span><span id="line-186"> Exchanger<AsyncCallback.DataCallback> exchanger = new Exchanger<>();</span> |
| <span class="source-line-no">187</span><span id="line-187"> doAnswer(i -> {</span> |
| <span class="source-line-no">188</span><span id="line-188"> exchanger.exchange(i.getArgument(2));</span> |
| <span class="source-line-no">189</span><span id="line-189"> return null;</span> |
| <span class="source-line-no">190</span><span id="line-190"> }).when(mockedZK).getData(anyString(), anyBoolean(), any(AsyncCallback.DataCallback.class),</span> |
| <span class="source-line-no">191</span><span id="line-191"> any());</span> |
| <span class="source-line-no">192</span><span id="line-192"> doAnswer(i -> null).when(mockedZK).close();</span> |
| <span class="source-line-no">193</span><span id="line-193"> when(mockedZK.getState()).thenReturn(ZooKeeper.States.CONNECTED);</span> |
| <span class="source-line-no">194</span><span id="line-194"> RO_ZK.zookeeper = mockedZK;</span> |
| <span class="source-line-no">195</span><span id="line-195"> CompletableFuture<byte[]> future = RO_ZK.get(PATH);</span> |
| <span class="source-line-no">196</span><span id="line-196"> AsyncCallback.DataCallback callback = exchanger.exchange(null);</span> |
| <span class="source-line-no">197</span><span id="line-197"> // 2 * keep alive time to ensure that we will not close the zk when there are pending requests</span> |
| <span class="source-line-no">198</span><span id="line-198"> Thread.sleep(6000);</span> |
| <span class="source-line-no">199</span><span id="line-199"> assertNotNull(RO_ZK.zookeeper);</span> |
| <span class="source-line-no">200</span><span id="line-200"> verify(mockedZK, never()).close();</span> |
| <span class="source-line-no">201</span><span id="line-201"> callback.processResult(Code.OK.intValue(), PATH, null, DATA, null);</span> |
| <span class="source-line-no">202</span><span id="line-202"> assertArrayEquals(DATA, future.get());</span> |
| <span class="source-line-no">203</span><span id="line-203"> // now we will close the idle connection.</span> |
| <span class="source-line-no">204</span><span id="line-204"> waitForIdleConnectionClosed();</span> |
| <span class="source-line-no">205</span><span id="line-205"> verify(mockedZK, times(1)).close();</span> |
| <span class="source-line-no">206</span><span id="line-206"> }</span> |
| <span class="source-line-no">207</span><span id="line-207">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
