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Posted to commits@hbase.apache.org by gi...@apache.org on 2018/10/23 14:55:34 UTC
[08/37] hbase-site git commit: Published site at
3b68e5393edba011146962c7457faffc1e3c0ee7.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/3b2f2cea/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestProcedureCleanup.RootProcedure.html
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diff --git a/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestProcedureCleanup.RootProcedure.html b/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestProcedureCleanup.RootProcedure.html
new file mode 100644
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<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.procedure2;<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.assertTrue;<a name="line.20"></a>
+<span class="sourceLineNo">021</span><a name="line.21"></a>
+<span class="sourceLineNo">022</span>import java.util.concurrent.CountDownLatch;<a name="line.22"></a>
+<span class="sourceLineNo">023</span><a name="line.23"></a>
+<span class="sourceLineNo">024</span>import org.apache.hadoop.fs.FileSystem;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import org.apache.hadoop.fs.Path;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.HBaseCommonTestingUtility;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.testclassification.MasterTests;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.junit.Assert;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.junit.BeforeClass;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import org.junit.ClassRule;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.junit.Test;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.junit.experimental.categories.Category;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.slf4j.Logger;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.slf4j.LoggerFactory;<a name="line.37"></a>
+<span class="sourceLineNo">038</span><a name="line.38"></a>
+<span class="sourceLineNo">039</span><a name="line.39"></a>
+<span class="sourceLineNo">040</span>@Category({MasterTests.class, SmallTests.class})<a name="line.40"></a>
+<span class="sourceLineNo">041</span>public class TestProcedureCleanup {<a name="line.41"></a>
+<span class="sourceLineNo">042</span> @ClassRule public static final HBaseClassTestRule CLASS_RULE = HBaseClassTestRule<a name="line.42"></a>
+<span class="sourceLineNo">043</span> .forClass(TestProcedureCleanup.class);<a name="line.43"></a>
+<span class="sourceLineNo">044</span><a name="line.44"></a>
+<span class="sourceLineNo">045</span><a name="line.45"></a>
+<span class="sourceLineNo">046</span> private static final Logger LOG = LoggerFactory.getLogger(TestProcedureCleanup.class);<a name="line.46"></a>
+<span class="sourceLineNo">047</span> private static final int PROCEDURE_EXECUTOR_SLOTS = 1;<a name="line.47"></a>
+<span class="sourceLineNo">048</span><a name="line.48"></a>
+<span class="sourceLineNo">049</span> private static TestProcEnv procEnv;<a name="line.49"></a>
+<span class="sourceLineNo">050</span> private static WALProcedureStore procStore;<a name="line.50"></a>
+<span class="sourceLineNo">051</span><a name="line.51"></a>
+<span class="sourceLineNo">052</span> private static ProcedureExecutor<TestProcEnv> procExecutor;<a name="line.52"></a>
+<span class="sourceLineNo">053</span><a name="line.53"></a>
+<span class="sourceLineNo">054</span> private static HBaseCommonTestingUtility htu;<a name="line.54"></a>
+<span class="sourceLineNo">055</span><a name="line.55"></a>
+<span class="sourceLineNo">056</span> private static FileSystem fs;<a name="line.56"></a>
+<span class="sourceLineNo">057</span> private static Path testDir;<a name="line.57"></a>
+<span class="sourceLineNo">058</span> private static Path logDir;<a name="line.58"></a>
+<span class="sourceLineNo">059</span><a name="line.59"></a>
+<span class="sourceLineNo">060</span> private static class TestProcEnv {<a name="line.60"></a>
+<span class="sourceLineNo">061</span><a name="line.61"></a>
+<span class="sourceLineNo">062</span> }<a name="line.62"></a>
+<span class="sourceLineNo">063</span><a name="line.63"></a>
+<span class="sourceLineNo">064</span> private void createProcExecutor(String dir) throws Exception {<a name="line.64"></a>
+<span class="sourceLineNo">065</span> logDir = new Path(testDir, dir);<a name="line.65"></a>
+<span class="sourceLineNo">066</span> procStore = ProcedureTestingUtility.createWalStore(htu.getConfiguration(), logDir);<a name="line.66"></a>
+<span class="sourceLineNo">067</span> procExecutor = new ProcedureExecutor<>(htu.getConfiguration(), procEnv,<a name="line.67"></a>
+<span class="sourceLineNo">068</span> procStore);<a name="line.68"></a>
+<span class="sourceLineNo">069</span> procStore.start(PROCEDURE_EXECUTOR_SLOTS);<a name="line.69"></a>
+<span class="sourceLineNo">070</span> ProcedureTestingUtility<a name="line.70"></a>
+<span class="sourceLineNo">071</span> .initAndStartWorkers(procExecutor, PROCEDURE_EXECUTOR_SLOTS, true, true);<a name="line.71"></a>
+<span class="sourceLineNo">072</span> }<a name="line.72"></a>
+<span class="sourceLineNo">073</span><a name="line.73"></a>
+<span class="sourceLineNo">074</span> @BeforeClass<a name="line.74"></a>
+<span class="sourceLineNo">075</span> public static void setUp() throws Exception {<a name="line.75"></a>
+<span class="sourceLineNo">076</span> htu = new HBaseCommonTestingUtility();<a name="line.76"></a>
+<span class="sourceLineNo">077</span><a name="line.77"></a>
+<span class="sourceLineNo">078</span> // NOTE: The executor will be created by each test<a name="line.78"></a>
+<span class="sourceLineNo">079</span> procEnv = new TestProcEnv();<a name="line.79"></a>
+<span class="sourceLineNo">080</span> testDir = htu.getDataTestDir();<a name="line.80"></a>
+<span class="sourceLineNo">081</span> fs = testDir.getFileSystem(htu.getConfiguration());<a name="line.81"></a>
+<span class="sourceLineNo">082</span> assertTrue(testDir.depth() > 1);<a name="line.82"></a>
+<span class="sourceLineNo">083</span><a name="line.83"></a>
+<span class="sourceLineNo">084</span><a name="line.84"></a>
+<span class="sourceLineNo">085</span> }<a name="line.85"></a>
+<span class="sourceLineNo">086</span><a name="line.86"></a>
+<span class="sourceLineNo">087</span> @Test<a name="line.87"></a>
+<span class="sourceLineNo">088</span> public void testProcedureShouldNotCleanOnLoad() throws Exception {<a name="line.88"></a>
+<span class="sourceLineNo">089</span> createProcExecutor("testProcedureShouldNotCleanOnLoad");<a name="line.89"></a>
+<span class="sourceLineNo">090</span> final RootProcedure proc = new RootProcedure();<a name="line.90"></a>
+<span class="sourceLineNo">091</span> long rootProc = procExecutor.submitProcedure(proc);<a name="line.91"></a>
+<span class="sourceLineNo">092</span> LOG.info("Begin to execute " + rootProc);<a name="line.92"></a>
+<span class="sourceLineNo">093</span> // wait until the child procedure arrival<a name="line.93"></a>
+<span class="sourceLineNo">094</span> while(procExecutor.getProcedures().size() < 2) {<a name="line.94"></a>
+<span class="sourceLineNo">095</span> Thread.sleep(100);<a name="line.95"></a>
+<span class="sourceLineNo">096</span> }<a name="line.96"></a>
+<span class="sourceLineNo">097</span> SuspendProcedure suspendProcedure = (SuspendProcedure) procExecutor<a name="line.97"></a>
+<span class="sourceLineNo">098</span> .getProcedures().get(1);<a name="line.98"></a>
+<span class="sourceLineNo">099</span> // wait until the suspendProcedure executed<a name="line.99"></a>
+<span class="sourceLineNo">100</span> suspendProcedure.latch.countDown();<a name="line.100"></a>
+<span class="sourceLineNo">101</span> Thread.sleep(100);<a name="line.101"></a>
+<span class="sourceLineNo">102</span> // roll the procedure log<a name="line.102"></a>
+<span class="sourceLineNo">103</span> LOG.info("Begin to roll log ");<a name="line.103"></a>
+<span class="sourceLineNo">104</span> procStore.rollWriterForTesting();<a name="line.104"></a>
+<span class="sourceLineNo">105</span> LOG.info("finish to roll log ");<a name="line.105"></a>
+<span class="sourceLineNo">106</span> Thread.sleep(500);<a name="line.106"></a>
+<span class="sourceLineNo">107</span> LOG.info("begin to restart1 ");<a name="line.107"></a>
+<span class="sourceLineNo">108</span> ProcedureTestingUtility.restart(procExecutor, true);<a name="line.108"></a>
+<span class="sourceLineNo">109</span> LOG.info("finish to restart1 ");<a name="line.109"></a>
+<span class="sourceLineNo">110</span> Assert.assertTrue(procExecutor.getProcedure(rootProc) != null);<a name="line.110"></a>
+<span class="sourceLineNo">111</span> Thread.sleep(500);<a name="line.111"></a>
+<span class="sourceLineNo">112</span> LOG.info("begin to restart2 ");<a name="line.112"></a>
+<span class="sourceLineNo">113</span> ProcedureTestingUtility.restart(procExecutor, true);<a name="line.113"></a>
+<span class="sourceLineNo">114</span> LOG.info("finish to restart2 ");<a name="line.114"></a>
+<span class="sourceLineNo">115</span> Assert.assertTrue(procExecutor.getProcedure(rootProc) != null);<a name="line.115"></a>
+<span class="sourceLineNo">116</span> }<a name="line.116"></a>
+<span class="sourceLineNo">117</span><a name="line.117"></a>
+<span class="sourceLineNo">118</span> @Test<a name="line.118"></a>
+<span class="sourceLineNo">119</span> public void testProcedureUpdatedShouldClean() throws Exception {<a name="line.119"></a>
+<span class="sourceLineNo">120</span> createProcExecutor("testProcedureUpdatedShouldClean");<a name="line.120"></a>
+<span class="sourceLineNo">121</span> SuspendProcedure suspendProcedure = new SuspendProcedure();<a name="line.121"></a>
+<span class="sourceLineNo">122</span> long suspendProc = procExecutor.submitProcedure(suspendProcedure);<a name="line.122"></a>
+<span class="sourceLineNo">123</span> LOG.info("Begin to execute " + suspendProc);<a name="line.123"></a>
+<span class="sourceLineNo">124</span> suspendProcedure.latch.countDown();<a name="line.124"></a>
+<span class="sourceLineNo">125</span> Thread.sleep(500);<a name="line.125"></a>
+<span class="sourceLineNo">126</span> LOG.info("begin to restart1 ");<a name="line.126"></a>
+<span class="sourceLineNo">127</span> ProcedureTestingUtility.restart(procExecutor, true);<a name="line.127"></a>
+<span class="sourceLineNo">128</span> LOG.info("finish to restart1 ");<a name="line.128"></a>
+<span class="sourceLineNo">129</span> while(procExecutor.getProcedure(suspendProc) == null) {<a name="line.129"></a>
+<span class="sourceLineNo">130</span> Thread.sleep(100);<a name="line.130"></a>
+<span class="sourceLineNo">131</span> }<a name="line.131"></a>
+<span class="sourceLineNo">132</span> // Wait until the suspendProc executed after restart<a name="line.132"></a>
+<span class="sourceLineNo">133</span> suspendProcedure = (SuspendProcedure) procExecutor.getProcedure(suspendProc);<a name="line.133"></a>
+<span class="sourceLineNo">134</span> suspendProcedure.latch.countDown();<a name="line.134"></a>
+<span class="sourceLineNo">135</span> Thread.sleep(500);<a name="line.135"></a>
+<span class="sourceLineNo">136</span> // Should be 1 log since the suspendProcedure is updated in the new log<a name="line.136"></a>
+<span class="sourceLineNo">137</span> Assert.assertTrue(procStore.getActiveLogs().size() == 1);<a name="line.137"></a>
+<span class="sourceLineNo">138</span> // restart procExecutor<a name="line.138"></a>
+<span class="sourceLineNo">139</span> LOG.info("begin to restart2");<a name="line.139"></a>
+<span class="sourceLineNo">140</span> // Restart the executor but do not start the workers.<a name="line.140"></a>
+<span class="sourceLineNo">141</span> // Otherwise, the suspendProcedure will soon be executed and the oldest log<a name="line.141"></a>
+<span class="sourceLineNo">142</span> // will be cleaned, leaving only the newest log.<a name="line.142"></a>
+<span class="sourceLineNo">143</span> ProcedureTestingUtility.restart(procExecutor, true, false);<a name="line.143"></a>
+<span class="sourceLineNo">144</span> LOG.info("finish to restart2");<a name="line.144"></a>
+<span class="sourceLineNo">145</span> // There should be two active logs<a name="line.145"></a>
+<span class="sourceLineNo">146</span> Assert.assertTrue(procStore.getActiveLogs().size() == 2);<a name="line.146"></a>
+<span class="sourceLineNo">147</span> procExecutor.startWorkers();<a name="line.147"></a>
+<span class="sourceLineNo">148</span><a name="line.148"></a>
+<span class="sourceLineNo">149</span> }<a name="line.149"></a>
+<span class="sourceLineNo">150</span><a name="line.150"></a>
+<span class="sourceLineNo">151</span> @Test<a name="line.151"></a>
+<span class="sourceLineNo">152</span> public void testProcedureDeletedShouldClean() throws Exception {<a name="line.152"></a>
+<span class="sourceLineNo">153</span> createProcExecutor("testProcedureDeletedShouldClean");<a name="line.153"></a>
+<span class="sourceLineNo">154</span> WaitProcedure waitProcedure = new WaitProcedure();<a name="line.154"></a>
+<span class="sourceLineNo">155</span> long waitProce = procExecutor.submitProcedure(waitProcedure);<a name="line.155"></a>
+<span class="sourceLineNo">156</span> LOG.info("Begin to execute " + waitProce);<a name="line.156"></a>
+<span class="sourceLineNo">157</span> Thread.sleep(500);<a name="line.157"></a>
+<span class="sourceLineNo">158</span> LOG.info("begin to restart1 ");<a name="line.158"></a>
+<span class="sourceLineNo">159</span> ProcedureTestingUtility.restart(procExecutor, true);<a name="line.159"></a>
+<span class="sourceLineNo">160</span> LOG.info("finish to restart1 ");<a name="line.160"></a>
+<span class="sourceLineNo">161</span> while(procExecutor.getProcedure(waitProce) == null) {<a name="line.161"></a>
+<span class="sourceLineNo">162</span> Thread.sleep(100);<a name="line.162"></a>
+<span class="sourceLineNo">163</span> }<a name="line.163"></a>
+<span class="sourceLineNo">164</span> // Wait until the suspendProc executed after restart<a name="line.164"></a>
+<span class="sourceLineNo">165</span> waitProcedure = (WaitProcedure) procExecutor.getProcedure(waitProce);<a name="line.165"></a>
+<span class="sourceLineNo">166</span> waitProcedure.latch.countDown();<a name="line.166"></a>
+<span class="sourceLineNo">167</span> Thread.sleep(500);<a name="line.167"></a>
+<span class="sourceLineNo">168</span> // Should be 1 log since the suspendProcedure is updated in the new log<a name="line.168"></a>
+<span class="sourceLineNo">169</span> Assert.assertTrue(procStore.getActiveLogs().size() == 1);<a name="line.169"></a>
+<span class="sourceLineNo">170</span> // restart procExecutor<a name="line.170"></a>
+<span class="sourceLineNo">171</span> LOG.info("begin to restart2");<a name="line.171"></a>
+<span class="sourceLineNo">172</span> // Restart the executor but do not start the workers.<a name="line.172"></a>
+<span class="sourceLineNo">173</span> // Otherwise, the suspendProcedure will soon be executed and the oldest log<a name="line.173"></a>
+<span class="sourceLineNo">174</span> // will be cleaned, leaving only the newest log.<a name="line.174"></a>
+<span class="sourceLineNo">175</span> ProcedureTestingUtility.restart(procExecutor, true, false);<a name="line.175"></a>
+<span class="sourceLineNo">176</span> LOG.info("finish to restart2");<a name="line.176"></a>
+<span class="sourceLineNo">177</span> // There should be two active logs<a name="line.177"></a>
+<span class="sourceLineNo">178</span> Assert.assertTrue(procStore.getActiveLogs().size() == 2);<a name="line.178"></a>
+<span class="sourceLineNo">179</span> procExecutor.startWorkers();<a name="line.179"></a>
+<span class="sourceLineNo">180</span> }<a name="line.180"></a>
+<span class="sourceLineNo">181</span><a name="line.181"></a>
+<span class="sourceLineNo">182</span> public static class WaitProcedure<a name="line.182"></a>
+<span class="sourceLineNo">183</span> extends ProcedureTestingUtility.NoopProcedure<TestProcEnv> {<a name="line.183"></a>
+<span class="sourceLineNo">184</span> public WaitProcedure() {<a name="line.184"></a>
+<span class="sourceLineNo">185</span> super();<a name="line.185"></a>
+<span class="sourceLineNo">186</span> }<a name="line.186"></a>
+<span class="sourceLineNo">187</span><a name="line.187"></a>
+<span class="sourceLineNo">188</span> private CountDownLatch latch = new CountDownLatch(1);<a name="line.188"></a>
+<span class="sourceLineNo">189</span><a name="line.189"></a>
+<span class="sourceLineNo">190</span> @Override<a name="line.190"></a>
+<span class="sourceLineNo">191</span> protected Procedure[] execute(final TestProcEnv env)<a name="line.191"></a>
+<span class="sourceLineNo">192</span> throws ProcedureSuspendedException {<a name="line.192"></a>
+<span class="sourceLineNo">193</span> // Always wait here<a name="line.193"></a>
+<span class="sourceLineNo">194</span> LOG.info("wait here");<a name="line.194"></a>
+<span class="sourceLineNo">195</span> try {<a name="line.195"></a>
+<span class="sourceLineNo">196</span> latch.await();<a name="line.196"></a>
+<span class="sourceLineNo">197</span> } catch (Throwable t) {<a name="line.197"></a>
+<span class="sourceLineNo">198</span><a name="line.198"></a>
+<span class="sourceLineNo">199</span> }<a name="line.199"></a>
+<span class="sourceLineNo">200</span> LOG.info("finished");<a name="line.200"></a>
+<span class="sourceLineNo">201</span> return null;<a name="line.201"></a>
+<span class="sourceLineNo">202</span> }<a name="line.202"></a>
+<span class="sourceLineNo">203</span> }<a name="line.203"></a>
+<span class="sourceLineNo">204</span><a name="line.204"></a>
+<span class="sourceLineNo">205</span> public static class SuspendProcedure extends ProcedureTestingUtility.NoopProcedure<TestProcEnv> {<a name="line.205"></a>
+<span class="sourceLineNo">206</span> public SuspendProcedure() {<a name="line.206"></a>
+<span class="sourceLineNo">207</span> super();<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> private CountDownLatch latch = new CountDownLatch(1);<a name="line.210"></a>
+<span class="sourceLineNo">211</span><a name="line.211"></a>
+<span class="sourceLineNo">212</span> @Override<a name="line.212"></a>
+<span class="sourceLineNo">213</span> protected Procedure[] execute(final TestProcEnv env)<a name="line.213"></a>
+<span class="sourceLineNo">214</span> throws ProcedureSuspendedException {<a name="line.214"></a>
+<span class="sourceLineNo">215</span> // Always suspend the procedure<a name="line.215"></a>
+<span class="sourceLineNo">216</span> LOG.info("suspend here");<a name="line.216"></a>
+<span class="sourceLineNo">217</span> latch.countDown();<a name="line.217"></a>
+<span class="sourceLineNo">218</span> throw new ProcedureSuspendedException();<a name="line.218"></a>
+<span class="sourceLineNo">219</span> }<a name="line.219"></a>
+<span class="sourceLineNo">220</span> }<a name="line.220"></a>
+<span class="sourceLineNo">221</span><a name="line.221"></a>
+<span class="sourceLineNo">222</span> public static class RootProcedure extends ProcedureTestingUtility.NoopProcedure<TestProcEnv> {<a name="line.222"></a>
+<span class="sourceLineNo">223</span> private boolean childSpwaned = false;<a name="line.223"></a>
+<span class="sourceLineNo">224</span><a name="line.224"></a>
+<span class="sourceLineNo">225</span> public RootProcedure() {<a name="line.225"></a>
+<span class="sourceLineNo">226</span> super();<a name="line.226"></a>
+<span class="sourceLineNo">227</span> }<a name="line.227"></a>
+<span class="sourceLineNo">228</span><a name="line.228"></a>
+<span class="sourceLineNo">229</span> @Override<a name="line.229"></a>
+<span class="sourceLineNo">230</span> protected Procedure[] execute(final TestProcEnv env)<a name="line.230"></a>
+<span class="sourceLineNo">231</span> throws ProcedureSuspendedException {<a name="line.231"></a>
+<span class="sourceLineNo">232</span> if (!childSpwaned) {<a name="line.232"></a>
+<span class="sourceLineNo">233</span> childSpwaned = true;<a name="line.233"></a>
+<span class="sourceLineNo">234</span> return new Procedure[] {new SuspendProcedure()};<a name="line.234"></a>
+<span class="sourceLineNo">235</span> } else {<a name="line.235"></a>
+<span class="sourceLineNo">236</span> return null;<a name="line.236"></a>
+<span class="sourceLineNo">237</span> }<a name="line.237"></a>
+<span class="sourceLineNo">238</span> }<a name="line.238"></a>
+<span class="sourceLineNo">239</span> }<a name="line.239"></a>
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+</div>
+</body>
+</html>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/3b2f2cea/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestProcedureCleanup.SuspendProcedure.html
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<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.procedure2;<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.assertTrue;<a name="line.20"></a>
+<span class="sourceLineNo">021</span><a name="line.21"></a>
+<span class="sourceLineNo">022</span>import java.util.concurrent.CountDownLatch;<a name="line.22"></a>
+<span class="sourceLineNo">023</span><a name="line.23"></a>
+<span class="sourceLineNo">024</span>import org.apache.hadoop.fs.FileSystem;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import org.apache.hadoop.fs.Path;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.HBaseCommonTestingUtility;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.testclassification.MasterTests;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.junit.Assert;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.junit.BeforeClass;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import org.junit.ClassRule;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.junit.Test;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.junit.experimental.categories.Category;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.slf4j.Logger;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.slf4j.LoggerFactory;<a name="line.37"></a>
+<span class="sourceLineNo">038</span><a name="line.38"></a>
+<span class="sourceLineNo">039</span><a name="line.39"></a>
+<span class="sourceLineNo">040</span>@Category({MasterTests.class, SmallTests.class})<a name="line.40"></a>
+<span class="sourceLineNo">041</span>public class TestProcedureCleanup {<a name="line.41"></a>
+<span class="sourceLineNo">042</span> @ClassRule public static final HBaseClassTestRule CLASS_RULE = HBaseClassTestRule<a name="line.42"></a>
+<span class="sourceLineNo">043</span> .forClass(TestProcedureCleanup.class);<a name="line.43"></a>
+<span class="sourceLineNo">044</span><a name="line.44"></a>
+<span class="sourceLineNo">045</span><a name="line.45"></a>
+<span class="sourceLineNo">046</span> private static final Logger LOG = LoggerFactory.getLogger(TestProcedureCleanup.class);<a name="line.46"></a>
+<span class="sourceLineNo">047</span> private static final int PROCEDURE_EXECUTOR_SLOTS = 1;<a name="line.47"></a>
+<span class="sourceLineNo">048</span><a name="line.48"></a>
+<span class="sourceLineNo">049</span> private static TestProcEnv procEnv;<a name="line.49"></a>
+<span class="sourceLineNo">050</span> private static WALProcedureStore procStore;<a name="line.50"></a>
+<span class="sourceLineNo">051</span><a name="line.51"></a>
+<span class="sourceLineNo">052</span> private static ProcedureExecutor<TestProcEnv> procExecutor;<a name="line.52"></a>
+<span class="sourceLineNo">053</span><a name="line.53"></a>
+<span class="sourceLineNo">054</span> private static HBaseCommonTestingUtility htu;<a name="line.54"></a>
+<span class="sourceLineNo">055</span><a name="line.55"></a>
+<span class="sourceLineNo">056</span> private static FileSystem fs;<a name="line.56"></a>
+<span class="sourceLineNo">057</span> private static Path testDir;<a name="line.57"></a>
+<span class="sourceLineNo">058</span> private static Path logDir;<a name="line.58"></a>
+<span class="sourceLineNo">059</span><a name="line.59"></a>
+<span class="sourceLineNo">060</span> private static class TestProcEnv {<a name="line.60"></a>
+<span class="sourceLineNo">061</span><a name="line.61"></a>
+<span class="sourceLineNo">062</span> }<a name="line.62"></a>
+<span class="sourceLineNo">063</span><a name="line.63"></a>
+<span class="sourceLineNo">064</span> private void createProcExecutor(String dir) throws Exception {<a name="line.64"></a>
+<span class="sourceLineNo">065</span> logDir = new Path(testDir, dir);<a name="line.65"></a>
+<span class="sourceLineNo">066</span> procStore = ProcedureTestingUtility.createWalStore(htu.getConfiguration(), logDir);<a name="line.66"></a>
+<span class="sourceLineNo">067</span> procExecutor = new ProcedureExecutor<>(htu.getConfiguration(), procEnv,<a name="line.67"></a>
+<span class="sourceLineNo">068</span> procStore);<a name="line.68"></a>
+<span class="sourceLineNo">069</span> procStore.start(PROCEDURE_EXECUTOR_SLOTS);<a name="line.69"></a>
+<span class="sourceLineNo">070</span> ProcedureTestingUtility<a name="line.70"></a>
+<span class="sourceLineNo">071</span> .initAndStartWorkers(procExecutor, PROCEDURE_EXECUTOR_SLOTS, true, true);<a name="line.71"></a>
+<span class="sourceLineNo">072</span> }<a name="line.72"></a>
+<span class="sourceLineNo">073</span><a name="line.73"></a>
+<span class="sourceLineNo">074</span> @BeforeClass<a name="line.74"></a>
+<span class="sourceLineNo">075</span> public static void setUp() throws Exception {<a name="line.75"></a>
+<span class="sourceLineNo">076</span> htu = new HBaseCommonTestingUtility();<a name="line.76"></a>
+<span class="sourceLineNo">077</span><a name="line.77"></a>
+<span class="sourceLineNo">078</span> // NOTE: The executor will be created by each test<a name="line.78"></a>
+<span class="sourceLineNo">079</span> procEnv = new TestProcEnv();<a name="line.79"></a>
+<span class="sourceLineNo">080</span> testDir = htu.getDataTestDir();<a name="line.80"></a>
+<span class="sourceLineNo">081</span> fs = testDir.getFileSystem(htu.getConfiguration());<a name="line.81"></a>
+<span class="sourceLineNo">082</span> assertTrue(testDir.depth() > 1);<a name="line.82"></a>
+<span class="sourceLineNo">083</span><a name="line.83"></a>
+<span class="sourceLineNo">084</span><a name="line.84"></a>
+<span class="sourceLineNo">085</span> }<a name="line.85"></a>
+<span class="sourceLineNo">086</span><a name="line.86"></a>
+<span class="sourceLineNo">087</span> @Test<a name="line.87"></a>
+<span class="sourceLineNo">088</span> public void testProcedureShouldNotCleanOnLoad() throws Exception {<a name="line.88"></a>
+<span class="sourceLineNo">089</span> createProcExecutor("testProcedureShouldNotCleanOnLoad");<a name="line.89"></a>
+<span class="sourceLineNo">090</span> final RootProcedure proc = new RootProcedure();<a name="line.90"></a>
+<span class="sourceLineNo">091</span> long rootProc = procExecutor.submitProcedure(proc);<a name="line.91"></a>
+<span class="sourceLineNo">092</span> LOG.info("Begin to execute " + rootProc);<a name="line.92"></a>
+<span class="sourceLineNo">093</span> // wait until the child procedure arrival<a name="line.93"></a>
+<span class="sourceLineNo">094</span> while(procExecutor.getProcedures().size() < 2) {<a name="line.94"></a>
+<span class="sourceLineNo">095</span> Thread.sleep(100);<a name="line.95"></a>
+<span class="sourceLineNo">096</span> }<a name="line.96"></a>
+<span class="sourceLineNo">097</span> SuspendProcedure suspendProcedure = (SuspendProcedure) procExecutor<a name="line.97"></a>
+<span class="sourceLineNo">098</span> .getProcedures().get(1);<a name="line.98"></a>
+<span class="sourceLineNo">099</span> // wait until the suspendProcedure executed<a name="line.99"></a>
+<span class="sourceLineNo">100</span> suspendProcedure.latch.countDown();<a name="line.100"></a>
+<span class="sourceLineNo">101</span> Thread.sleep(100);<a name="line.101"></a>
+<span class="sourceLineNo">102</span> // roll the procedure log<a name="line.102"></a>
+<span class="sourceLineNo">103</span> LOG.info("Begin to roll log ");<a name="line.103"></a>
+<span class="sourceLineNo">104</span> procStore.rollWriterForTesting();<a name="line.104"></a>
+<span class="sourceLineNo">105</span> LOG.info("finish to roll log ");<a name="line.105"></a>
+<span class="sourceLineNo">106</span> Thread.sleep(500);<a name="line.106"></a>
+<span class="sourceLineNo">107</span> LOG.info("begin to restart1 ");<a name="line.107"></a>
+<span class="sourceLineNo">108</span> ProcedureTestingUtility.restart(procExecutor, true);<a name="line.108"></a>
+<span class="sourceLineNo">109</span> LOG.info("finish to restart1 ");<a name="line.109"></a>
+<span class="sourceLineNo">110</span> Assert.assertTrue(procExecutor.getProcedure(rootProc) != null);<a name="line.110"></a>
+<span class="sourceLineNo">111</span> Thread.sleep(500);<a name="line.111"></a>
+<span class="sourceLineNo">112</span> LOG.info("begin to restart2 ");<a name="line.112"></a>
+<span class="sourceLineNo">113</span> ProcedureTestingUtility.restart(procExecutor, true);<a name="line.113"></a>
+<span class="sourceLineNo">114</span> LOG.info("finish to restart2 ");<a name="line.114"></a>
+<span class="sourceLineNo">115</span> Assert.assertTrue(procExecutor.getProcedure(rootProc) != null);<a name="line.115"></a>
+<span class="sourceLineNo">116</span> }<a name="line.116"></a>
+<span class="sourceLineNo">117</span><a name="line.117"></a>
+<span class="sourceLineNo">118</span> @Test<a name="line.118"></a>
+<span class="sourceLineNo">119</span> public void testProcedureUpdatedShouldClean() throws Exception {<a name="line.119"></a>
+<span class="sourceLineNo">120</span> createProcExecutor("testProcedureUpdatedShouldClean");<a name="line.120"></a>
+<span class="sourceLineNo">121</span> SuspendProcedure suspendProcedure = new SuspendProcedure();<a name="line.121"></a>
+<span class="sourceLineNo">122</span> long suspendProc = procExecutor.submitProcedure(suspendProcedure);<a name="line.122"></a>
+<span class="sourceLineNo">123</span> LOG.info("Begin to execute " + suspendProc);<a name="line.123"></a>
+<span class="sourceLineNo">124</span> suspendProcedure.latch.countDown();<a name="line.124"></a>
+<span class="sourceLineNo">125</span> Thread.sleep(500);<a name="line.125"></a>
+<span class="sourceLineNo">126</span> LOG.info("begin to restart1 ");<a name="line.126"></a>
+<span class="sourceLineNo">127</span> ProcedureTestingUtility.restart(procExecutor, true);<a name="line.127"></a>
+<span class="sourceLineNo">128</span> LOG.info("finish to restart1 ");<a name="line.128"></a>
+<span class="sourceLineNo">129</span> while(procExecutor.getProcedure(suspendProc) == null) {<a name="line.129"></a>
+<span class="sourceLineNo">130</span> Thread.sleep(100);<a name="line.130"></a>
+<span class="sourceLineNo">131</span> }<a name="line.131"></a>
+<span class="sourceLineNo">132</span> // Wait until the suspendProc executed after restart<a name="line.132"></a>
+<span class="sourceLineNo">133</span> suspendProcedure = (SuspendProcedure) procExecutor.getProcedure(suspendProc);<a name="line.133"></a>
+<span class="sourceLineNo">134</span> suspendProcedure.latch.countDown();<a name="line.134"></a>
+<span class="sourceLineNo">135</span> Thread.sleep(500);<a name="line.135"></a>
+<span class="sourceLineNo">136</span> // Should be 1 log since the suspendProcedure is updated in the new log<a name="line.136"></a>
+<span class="sourceLineNo">137</span> Assert.assertTrue(procStore.getActiveLogs().size() == 1);<a name="line.137"></a>
+<span class="sourceLineNo">138</span> // restart procExecutor<a name="line.138"></a>
+<span class="sourceLineNo">139</span> LOG.info("begin to restart2");<a name="line.139"></a>
+<span class="sourceLineNo">140</span> // Restart the executor but do not start the workers.<a name="line.140"></a>
+<span class="sourceLineNo">141</span> // Otherwise, the suspendProcedure will soon be executed and the oldest log<a name="line.141"></a>
+<span class="sourceLineNo">142</span> // will be cleaned, leaving only the newest log.<a name="line.142"></a>
+<span class="sourceLineNo">143</span> ProcedureTestingUtility.restart(procExecutor, true, false);<a name="line.143"></a>
+<span class="sourceLineNo">144</span> LOG.info("finish to restart2");<a name="line.144"></a>
+<span class="sourceLineNo">145</span> // There should be two active logs<a name="line.145"></a>
+<span class="sourceLineNo">146</span> Assert.assertTrue(procStore.getActiveLogs().size() == 2);<a name="line.146"></a>
+<span class="sourceLineNo">147</span> procExecutor.startWorkers();<a name="line.147"></a>
+<span class="sourceLineNo">148</span><a name="line.148"></a>
+<span class="sourceLineNo">149</span> }<a name="line.149"></a>
+<span class="sourceLineNo">150</span><a name="line.150"></a>
+<span class="sourceLineNo">151</span> @Test<a name="line.151"></a>
+<span class="sourceLineNo">152</span> public void testProcedureDeletedShouldClean() throws Exception {<a name="line.152"></a>
+<span class="sourceLineNo">153</span> createProcExecutor("testProcedureDeletedShouldClean");<a name="line.153"></a>
+<span class="sourceLineNo">154</span> WaitProcedure waitProcedure = new WaitProcedure();<a name="line.154"></a>
+<span class="sourceLineNo">155</span> long waitProce = procExecutor.submitProcedure(waitProcedure);<a name="line.155"></a>
+<span class="sourceLineNo">156</span> LOG.info("Begin to execute " + waitProce);<a name="line.156"></a>
+<span class="sourceLineNo">157</span> Thread.sleep(500);<a name="line.157"></a>
+<span class="sourceLineNo">158</span> LOG.info("begin to restart1 ");<a name="line.158"></a>
+<span class="sourceLineNo">159</span> ProcedureTestingUtility.restart(procExecutor, true);<a name="line.159"></a>
+<span class="sourceLineNo">160</span> LOG.info("finish to restart1 ");<a name="line.160"></a>
+<span class="sourceLineNo">161</span> while(procExecutor.getProcedure(waitProce) == null) {<a name="line.161"></a>
+<span class="sourceLineNo">162</span> Thread.sleep(100);<a name="line.162"></a>
+<span class="sourceLineNo">163</span> }<a name="line.163"></a>
+<span class="sourceLineNo">164</span> // Wait until the suspendProc executed after restart<a name="line.164"></a>
+<span class="sourceLineNo">165</span> waitProcedure = (WaitProcedure) procExecutor.getProcedure(waitProce);<a name="line.165"></a>
+<span class="sourceLineNo">166</span> waitProcedure.latch.countDown();<a name="line.166"></a>
+<span class="sourceLineNo">167</span> Thread.sleep(500);<a name="line.167"></a>
+<span class="sourceLineNo">168</span> // Should be 1 log since the suspendProcedure is updated in the new log<a name="line.168"></a>
+<span class="sourceLineNo">169</span> Assert.assertTrue(procStore.getActiveLogs().size() == 1);<a name="line.169"></a>
+<span class="sourceLineNo">170</span> // restart procExecutor<a name="line.170"></a>
+<span class="sourceLineNo">171</span> LOG.info("begin to restart2");<a name="line.171"></a>
+<span class="sourceLineNo">172</span> // Restart the executor but do not start the workers.<a name="line.172"></a>
+<span class="sourceLineNo">173</span> // Otherwise, the suspendProcedure will soon be executed and the oldest log<a name="line.173"></a>
+<span class="sourceLineNo">174</span> // will be cleaned, leaving only the newest log.<a name="line.174"></a>
+<span class="sourceLineNo">175</span> ProcedureTestingUtility.restart(procExecutor, true, false);<a name="line.175"></a>
+<span class="sourceLineNo">176</span> LOG.info("finish to restart2");<a name="line.176"></a>
+<span class="sourceLineNo">177</span> // There should be two active logs<a name="line.177"></a>
+<span class="sourceLineNo">178</span> Assert.assertTrue(procStore.getActiveLogs().size() == 2);<a name="line.178"></a>
+<span class="sourceLineNo">179</span> procExecutor.startWorkers();<a name="line.179"></a>
+<span class="sourceLineNo">180</span> }<a name="line.180"></a>
+<span class="sourceLineNo">181</span><a name="line.181"></a>
+<span class="sourceLineNo">182</span> public static class WaitProcedure<a name="line.182"></a>
+<span class="sourceLineNo">183</span> extends ProcedureTestingUtility.NoopProcedure<TestProcEnv> {<a name="line.183"></a>
+<span class="sourceLineNo">184</span> public WaitProcedure() {<a name="line.184"></a>
+<span class="sourceLineNo">185</span> super();<a name="line.185"></a>
+<span class="sourceLineNo">186</span> }<a name="line.186"></a>
+<span class="sourceLineNo">187</span><a name="line.187"></a>
+<span class="sourceLineNo">188</span> private CountDownLatch latch = new CountDownLatch(1);<a name="line.188"></a>
+<span class="sourceLineNo">189</span><a name="line.189"></a>
+<span class="sourceLineNo">190</span> @Override<a name="line.190"></a>
+<span class="sourceLineNo">191</span> protected Procedure[] execute(final TestProcEnv env)<a name="line.191"></a>
+<span class="sourceLineNo">192</span> throws ProcedureSuspendedException {<a name="line.192"></a>
+<span class="sourceLineNo">193</span> // Always wait here<a name="line.193"></a>
+<span class="sourceLineNo">194</span> LOG.info("wait here");<a name="line.194"></a>
+<span class="sourceLineNo">195</span> try {<a name="line.195"></a>
+<span class="sourceLineNo">196</span> latch.await();<a name="line.196"></a>
+<span class="sourceLineNo">197</span> } catch (Throwable t) {<a name="line.197"></a>
+<span class="sourceLineNo">198</span><a name="line.198"></a>
+<span class="sourceLineNo">199</span> }<a name="line.199"></a>
+<span class="sourceLineNo">200</span> LOG.info("finished");<a name="line.200"></a>
+<span class="sourceLineNo">201</span> return null;<a name="line.201"></a>
+<span class="sourceLineNo">202</span> }<a name="line.202"></a>
+<span class="sourceLineNo">203</span> }<a name="line.203"></a>
+<span class="sourceLineNo">204</span><a name="line.204"></a>
+<span class="sourceLineNo">205</span> public static class SuspendProcedure extends ProcedureTestingUtility.NoopProcedure<TestProcEnv> {<a name="line.205"></a>
+<span class="sourceLineNo">206</span> public SuspendProcedure() {<a name="line.206"></a>
+<span class="sourceLineNo">207</span> super();<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> private CountDownLatch latch = new CountDownLatch(1);<a name="line.210"></a>
+<span class="sourceLineNo">211</span><a name="line.211"></a>
+<span class="sourceLineNo">212</span> @Override<a name="line.212"></a>
+<span class="sourceLineNo">213</span> protected Procedure[] execute(final TestProcEnv env)<a name="line.213"></a>
+<span class="sourceLineNo">214</span> throws ProcedureSuspendedException {<a name="line.214"></a>
+<span class="sourceLineNo">215</span> // Always suspend the procedure<a name="line.215"></a>
+<span class="sourceLineNo">216</span> LOG.info("suspend here");<a name="line.216"></a>
+<span class="sourceLineNo">217</span> latch.countDown();<a name="line.217"></a>
+<span class="sourceLineNo">218</span> throw new ProcedureSuspendedException();<a name="line.218"></a>
+<span class="sourceLineNo">219</span> }<a name="line.219"></a>
+<span class="sourceLineNo">220</span> }<a name="line.220"></a>
+<span class="sourceLineNo">221</span><a name="line.221"></a>
+<span class="sourceLineNo">222</span> public static class RootProcedure extends ProcedureTestingUtility.NoopProcedure<TestProcEnv> {<a name="line.222"></a>
+<span class="sourceLineNo">223</span> private boolean childSpwaned = false;<a name="line.223"></a>
+<span class="sourceLineNo">224</span><a name="line.224"></a>
+<span class="sourceLineNo">225</span> public RootProcedure() {<a name="line.225"></a>
+<span class="sourceLineNo">226</span> super();<a name="line.226"></a>
+<span class="sourceLineNo">227</span> }<a name="line.227"></a>
+<span class="sourceLineNo">228</span><a name="line.228"></a>
+<span class="sourceLineNo">229</span> @Override<a name="line.229"></a>
+<span class="sourceLineNo">230</span> protected Procedure[] execute(final TestProcEnv env)<a name="line.230"></a>
+<span class="sourceLineNo">231</span> throws ProcedureSuspendedException {<a name="line.231"></a>
+<span class="sourceLineNo">232</span> if (!childSpwaned) {<a name="line.232"></a>
+<span class="sourceLineNo">233</span> childSpwaned = true;<a name="line.233"></a>
+<span class="sourceLineNo">234</span> return new Procedure[] {new SuspendProcedure()};<a name="line.234"></a>
+<span class="sourceLineNo">235</span> } else {<a name="line.235"></a>
+<span class="sourceLineNo">236</span> return null;<a name="line.236"></a>
+<span class="sourceLineNo">237</span> }<a name="line.237"></a>
+<span class="sourceLineNo">238</span> }<a name="line.238"></a>
+<span class="sourceLineNo">239</span> }<a name="line.239"></a>
+<span class="sourceLineNo">240</span><a name="line.240"></a>
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+</body>
+</html>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/3b2f2cea/testdevapidocs/src-html/org/apache/hadoop/hbase/procedure2/TestProcedureCleanup.TestProcEnv.html
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<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.procedure2;<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.assertTrue;<a name="line.20"></a>
+<span class="sourceLineNo">021</span><a name="line.21"></a>
+<span class="sourceLineNo">022</span>import java.util.concurrent.CountDownLatch;<a name="line.22"></a>
+<span class="sourceLineNo">023</span><a name="line.23"></a>
+<span class="sourceLineNo">024</span>import org.apache.hadoop.fs.FileSystem;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import org.apache.hadoop.fs.Path;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.HBaseCommonTestingUtility;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.procedure2.store.wal.WALProcedureStore;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.testclassification.MasterTests;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.junit.Assert;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.junit.BeforeClass;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import org.junit.ClassRule;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.junit.Test;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.junit.experimental.categories.Category;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.slf4j.Logger;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.slf4j.LoggerFactory;<a name="line.37"></a>
+<span class="sourceLineNo">038</span><a name="line.38"></a>
+<span class="sourceLineNo">039</span><a name="line.39"></a>
+<span class="sourceLineNo">040</span>@Category({MasterTests.class, SmallTests.class})<a name="line.40"></a>
+<span class="sourceLineNo">041</span>public class TestProcedureCleanup {<a name="line.41"></a>
+<span class="sourceLineNo">042</span> @ClassRule public static final HBaseClassTestRule CLASS_RULE = HBaseClassTestRule<a name="line.42"></a>
+<span class="sourceLineNo">043</span> .forClass(TestProcedureCleanup.class);<a name="line.43"></a>
+<span class="sourceLineNo">044</span><a name="line.44"></a>
+<span class="sourceLineNo">045</span><a name="line.45"></a>
+<span class="sourceLineNo">046</span> private static final Logger LOG = LoggerFactory.getLogger(TestProcedureCleanup.class);<a name="line.46"></a>
+<span class="sourceLineNo">047</span> private static final int PROCEDURE_EXECUTOR_SLOTS = 1;<a name="line.47"></a>
+<span class="sourceLineNo">048</span><a name="line.48"></a>
+<span class="sourceLineNo">049</span> private static TestProcEnv procEnv;<a name="line.49"></a>
+<span class="sourceLineNo">050</span> private static WALProcedureStore procStore;<a name="line.50"></a>
+<span class="sourceLineNo">051</span><a name="line.51"></a>
+<span class="sourceLineNo">052</span> private static ProcedureExecutor<TestProcEnv> procExecutor;<a name="line.52"></a>
+<span class="sourceLineNo">053</span><a name="line.53"></a>
+<span class="sourceLineNo">054</span> private static HBaseCommonTestingUtility htu;<a name="line.54"></a>
+<span class="sourceLineNo">055</span><a name="line.55"></a>
+<span class="sourceLineNo">056</span> private static FileSystem fs;<a name="line.56"></a>
+<span class="sourceLineNo">057</span> private static Path testDir;<a name="line.57"></a>
+<span class="sourceLineNo">058</span> private static Path logDir;<a name="line.58"></a>
+<span class="sourceLineNo">059</span><a name="line.59"></a>
+<span class="sourceLineNo">060</span> private static class TestProcEnv {<a name="line.60"></a>
+<span class="sourceLineNo">061</span><a name="line.61"></a>
+<span class="sourceLineNo">062</span> }<a name="line.62"></a>
+<span class="sourceLineNo">063</span><a name="line.63"></a>
+<span class="sourceLineNo">064</span> private void createProcExecutor(String dir) throws Exception {<a name="line.64"></a>
+<span class="sourceLineNo">065</span> logDir = new Path(testDir, dir);<a name="line.65"></a>
+<span class="sourceLineNo">066</span> procStore = ProcedureTestingUtility.createWalStore(htu.getConfiguration(), logDir);<a name="line.66"></a>
+<span class="sourceLineNo">067</span> procExecutor = new ProcedureExecutor<>(htu.getConfiguration(), procEnv,<a name="line.67"></a>
+<span class="sourceLineNo">068</span> procStore);<a name="line.68"></a>
+<span class="sourceLineNo">069</span> procStore.start(PROCEDURE_EXECUTOR_SLOTS);<a name="line.69"></a>
+<span class="sourceLineNo">070</span> ProcedureTestingUtility<a name="line.70"></a>
+<span class="sourceLineNo">071</span> .initAndStartWorkers(procExecutor, PROCEDURE_EXECUTOR_SLOTS, true, true);<a name="line.71"></a>
+<span class="sourceLineNo">072</span> }<a name="line.72"></a>
+<span class="sourceLineNo">073</span><a name="line.73"></a>
+<span class="sourceLineNo">074</span> @BeforeClass<a name="line.74"></a>
+<span class="sourceLineNo">075</span> public static void setUp() throws Exception {<a name="line.75"></a>
+<span class="sourceLineNo">076</span> htu = new HBaseCommonTestingUtility();<a name="line.76"></a>
+<span class="sourceLineNo">077</span><a name="line.77"></a>
+<span class="sourceLineNo">078</span> // NOTE: The executor will be created by each test<a name="line.78"></a>
+<span class="sourceLineNo">079</span> procEnv = new TestProcEnv();<a name="line.79"></a>
+<span class="sourceLineNo">080</span> testDir = htu.getDataTestDir();<a name="line.80"></a>
+<span class="sourceLineNo">081</span> fs = testDir.getFileSystem(htu.getConfiguration());<a name="line.81"></a>
+<span class="sourceLineNo">082</span> assertTrue(testDir.depth() > 1);<a name="line.82"></a>
+<span class="sourceLineNo">083</span><a name="line.83"></a>
+<span class="sourceLineNo">084</span><a name="line.84"></a>
+<span class="sourceLineNo">085</span> }<a name="line.85"></a>
+<span class="sourceLineNo">086</span><a name="line.86"></a>
+<span class="sourceLineNo">087</span> @Test<a name="line.87"></a>
+<span class="sourceLineNo">088</span> public void testProcedureShouldNotCleanOnLoad() throws Exception {<a name="line.88"></a>
+<span class="sourceLineNo">089</span> createProcExecutor("testProcedureShouldNotCleanOnLoad");<a name="line.89"></a>
+<span class="sourceLineNo">090</span> final RootProcedure proc = new RootProcedure();<a name="line.90"></a>
+<span class="sourceLineNo">091</span> long rootProc = procExecutor.submitProcedure(proc);<a name="line.91"></a>
+<span class="sourceLineNo">092</span> LOG.info("Begin to execute " + rootProc);<a name="line.92"></a>
+<span class="sourceLineNo">093</span> // wait until the child procedure arrival<a name="line.93"></a>
+<span class="sourceLineNo">094</span> while(procExecutor.getProcedures().size() < 2) {<a name="line.94"></a>
+<span class="sourceLineNo">095</span> Thread.sleep(100);<a name="line.95"></a>
+<span class="sourceLineNo">096</span> }<a name="line.96"></a>
+<span class="sourceLineNo">097</span> SuspendProcedure suspendProcedure = (SuspendProcedure) procExecutor<a name="line.97"></a>
+<span class="sourceLineNo">098</span> .getProcedures().get(1);<a name="line.98"></a>
+<span class="sourceLineNo">099</span> // wait until the suspendProcedure executed<a name="line.99"></a>
+<span class="sourceLineNo">100</span> suspendProcedure.latch.countDown();<a name="line.100"></a>
+<span class="sourceLineNo">101</span> Thread.sleep(100);<a name="line.101"></a>
+<span class="sourceLineNo">102</span> // roll the procedure log<a name="line.102"></a>
+<span class="sourceLineNo">103</span> LOG.info("Begin to roll log ");<a name="line.103"></a>
+<span class="sourceLineNo">104</span> procStore.rollWriterForTesting();<a name="line.104"></a>
+<span class="sourceLineNo">105</span> LOG.info("finish to roll log ");<a name="line.105"></a>
+<span class="sourceLineNo">106</span> Thread.sleep(500);<a name="line.106"></a>
+<span class="sourceLineNo">107</span> LOG.info("begin to restart1 ");<a name="line.107"></a>
+<span class="sourceLineNo">108</span> ProcedureTestingUtility.restart(procExecutor, true);<a name="line.108"></a>
+<span class="sourceLineNo">109</span> LOG.info("finish to restart1 ");<a name="line.109"></a>
+<span class="sourceLineNo">110</span> Assert.assertTrue(procExecutor.getProcedure(rootProc) != null);<a name="line.110"></a>
+<span class="sourceLineNo">111</span> Thread.sleep(500);<a name="line.111"></a>
+<span class="sourceLineNo">112</span> LOG.info("begin to restart2 ");<a name="line.112"></a>
+<span class="sourceLineNo">113</span> ProcedureTestingUtility.restart(procExecutor, true);<a name="line.113"></a>
+<span class="sourceLineNo">114</span> LOG.info("finish to restart2 ");<a name="line.114"></a>
+<span class="sourceLineNo">115</span> Assert.assertTrue(procExecutor.getProcedure(rootProc) != null);<a name="line.115"></a>
+<span class="sourceLineNo">116</span> }<a name="line.116"></a>
+<span class="sourceLineNo">117</span><a name="line.117"></a>
+<span class="sourceLineNo">118</span> @Test<a name="line.118"></a>
+<span class="sourceLineNo">119</span> public void testProcedureUpdatedShouldClean() throws Exception {<a name="line.119"></a>
+<span class="sourceLineNo">120</span> createProcExecutor("testProcedureUpdatedShouldClean");<a name="line.120"></a>
+<span class="sourceLineNo">121</span> SuspendProcedure suspendProcedure = new SuspendProcedure();<a name="line.121"></a>
+<span class="sourceLineNo">122</span> long suspendProc = procExecutor.submitProcedure(suspendProcedure);<a name="line.122"></a>
+<span class="sourceLineNo">123</span> LOG.info("Begin to execute " + suspendProc);<a name="line.123"></a>
+<span class="sourceLineNo">124</span> suspendProcedure.latch.countDown();<a name="line.124"></a>
+<span class="sourceLineNo">125</span> Thread.sleep(500);<a name="line.125"></a>
+<span class="sourceLineNo">126</span> LOG.info("begin to restart1 ");<a name="line.126"></a>
+<span class="sourceLineNo">127</span> ProcedureTestingUtility.restart(procExecutor, true);<a name="line.127"></a>
+<span class="sourceLineNo">128</span> LOG.info("finish to restart1 ");<a name="line.128"></a>
+<span class="sourceLineNo">129</span> while(procExecutor.getProcedure(suspendProc) == null) {<a name="line.129"></a>
+<span class="sourceLineNo">130</span> Thread.sleep(100);<a name="line.130"></a>
+<span class="sourceLineNo">131</span> }<a name="line.131"></a>
+<span class="sourceLineNo">132</span> // Wait until the suspendProc executed after restart<a name="line.132"></a>
+<span class="sourceLineNo">133</span> suspendProcedure = (SuspendProcedure) procExecutor.getProcedure(suspendProc);<a name="line.133"></a>
+<span class="sourceLineNo">134</span> suspendProcedure.latch.countDown();<a name="line.134"></a>
+<span class="sourceLineNo">135</span> Thread.sleep(500);<a name="line.135"></a>
+<span class="sourceLineNo">136</span> // Should be 1 log since the suspendProcedure is updated in the new log<a name="line.136"></a>
+<span class="sourceLineNo">137</span> Assert.assertTrue(procStore.getActiveLogs().size() == 1);<a name="line.137"></a>
+<span class="sourceLineNo">138</span> // restart procExecutor<a name="line.138"></a>
+<span class="sourceLineNo">139</span> LOG.info("begin to restart2");<a name="line.139"></a>
+<span class="sourceLineNo">140</span> // Restart the executor but do not start the workers.<a name="line.140"></a>
+<span class="sourceLineNo">141</span> // Otherwise, the suspendProcedure will soon be executed and the oldest log<a name="line.141"></a>
+<span class="sourceLineNo">142</span> // will be cleaned, leaving only the newest log.<a name="line.142"></a>
+<span class="sourceLineNo">143</span> ProcedureTestingUtility.restart(procExecutor, true, false);<a name="line.143"></a>
+<span class="sourceLineNo">144</span> LOG.info("finish to restart2");<a name="line.144"></a>
+<span class="sourceLineNo">145</span> // There should be two active logs<a name="line.145"></a>
+<span class="sourceLineNo">146</span> Assert.assertTrue(procStore.getActiveLogs().size() == 2);<a name="line.146"></a>
+<span class="sourceLineNo">147</span> procExecutor.startWorkers();<a name="line.147"></a>
+<span class="sourceLineNo">148</span><a name="line.148"></a>
+<span class="sourceLineNo">149</span> }<a name="line.149"></a>
+<span class="sourceLineNo">150</span><a name="line.150"></a>
+<span class="sourceLineNo">151</span> @Test<a name="line.151"></a>
+<span class="sourceLineNo">152</span> public void testProcedureDeletedShouldClean() throws Exception {<a name="line.152"></a>
+<span class="sourceLineNo">153</span> createProcExecutor("testProcedureDeletedShouldClean");<a name="line.153"></a>
+<span class="sourceLineNo">154</span> WaitProcedure waitProcedure = new WaitProcedure();<a name="line.154"></a>
+<span class="sourceLineNo">155</span> long waitProce = procExecutor.submitProcedure(waitProcedure);<a name="line.155"></a>
+<span class="sourceLineNo">156</span> LOG.info("Begin to execute " + waitProce);<a name="line.156"></a>
+<span class="sourceLineNo">157</span> Thread.sleep(500);<a name="line.157"></a>
+<span class="sourceLineNo">158</span> LOG.info("begin to restart1 ");<a name="line.158"></a>
+<span class="sourceLineNo">159</span> ProcedureTestingUtility.restart(procExecutor, true);<a name="line.159"></a>
+<span class="sourceLineNo">160</span> LOG.info("finish to restart1 ");<a name="line.160"></a>
+<span class="sourceLineNo">161</span> while(procExecutor.getProcedure(waitProce) == null) {<a name="line.161"></a>
+<span class="sourceLineNo">162</span> Thread.sleep(100);<a name="line.162"></a>
+<span class="sourceLineNo">163</span> }<a name="line.163"></a>
+<span class="sourceLineNo">164</span> // Wait until the suspendProc executed after restart<a name="line.164"></a>
+<span class="sourceLineNo">165</span> waitProcedure = (WaitProcedure) procExecutor.getProcedure(waitProce);<a name="line.165"></a>
+<span class="sourceLineNo">166</span> waitProcedure.latch.countDown();<a name="line.166"></a>
+<span class="sourceLineNo">167</span> Thread.sleep(500);<a name="line.167"></a>
+<span class="sourceLineNo">168</span> // Should be 1 log since the suspendProcedure is updated in the new log<a name="line.168"></a>
+<span class="sourceLineNo">169</span> Assert.assertTrue(procStore.getActiveLogs().size() == 1);<a name="line.169"></a>
+<span class="sourceLineNo">170</span> // restart procExecutor<a name="line.170"></a>
+<span class="sourceLineNo">171</span> LOG.info("begin to restart2");<a name="line.171"></a>
+<span class="sourceLineNo">172</span> // Restart the executor but do not start the workers.<a name="line.172"></a>
+<span class="sourceLineNo">173</span> // Otherwise, the suspendProcedure will soon be executed and the oldest log<a name="line.173"></a>
+<span class="sourceLineNo">174</span> // will be cleaned, leaving only the newest log.<a name="line.174"></a>
+<span class="sourceLineNo">175</span> ProcedureTestingUtility.restart(procExecutor, true, false);<a name="line.175"></a>
+<span class="sourceLineNo">176</span> LOG.info("finish to restart2");<a name="line.176"></a>
+<span class="sourceLineNo">177</span> // There should be two active logs<a name="line.177"></a>
+<span class="sourceLineNo">178</span> Assert.assertTrue(procStore.getActiveLogs().size() == 2);<a name="line.178"></a>
+<span class="sourceLineNo">179</span> procExecutor.startWorkers();<a name="line.179"></a>
+<span class="sourceLineNo">180</span> }<a name="line.180"></a>
+<span class="sourceLineNo">181</span><a name="line.181"></a>
+<span class="sourceLineNo">182</span> public static class WaitProcedure<a name="line.182"></a>
+<span class="sourceLineNo">183</span> extends ProcedureTestingUtility.NoopProcedure<TestProcEnv> {<a name="line.183"></a>
+<span class="sourceLineNo">184</span> public WaitProcedure() {<a name="line.184"></a>
+<span class="sourceLineNo">185</span> super();<a name="line.185"></a>
+<span class="sourceLineNo">186</span> }<a name="line.186"></a>
+<span class="sourceLineNo">187</span><a name="line.187"></a>
+<span class="sourceLineNo">188</span> private CountDownLatch latch = new CountDownLatch(1);<a name="line.188"></a>
+<span class="sourceLineNo">189</span><a name="line.189"></a>
+<span class="sourceLineNo">190</span> @Override<a name="line.190"></a>
+<span class="sourceLineNo">191</span> protected Procedure[] execute(final TestProcEnv env)<a name="line.191"></a>
+<span class="sourceLineNo">192</span> throws ProcedureSuspendedException {<a name="line.192"></a>
+<span class="sourceLineNo">193</span> // Always wait here<a name="line.193"></a>
+<span class="sourceLineNo">194</span> LOG.info("wait here");<a name="line.194"></a>
+<span class="sourceLineNo">195</span> try {<a name="line.195"></a>
+<span class="sourceLineNo">196</span> latch.await();<a name="line.196"></a>
+<span class="sourceLineNo">197</span> } catch (Throwable t) {<a name="line.197"></a>
+<span class="sourceLineNo">198</span><a name="line.198"></a>
+<span class="sourceLineNo">199</span> }<a name="line.199"></a>
+<span class="sourceLineNo">200</span> LOG.info("finished");<a name="line.200"></a>
+<span class="sourceLineNo">201</span> return null;<a name="line.201"></a>
+<span class="sourceLineNo">202</span> }<a name="line.202"></a>
+<span class="sourceLineNo">203</span> }<a name="line.203"></a>
+<span class="sourceLineNo">204</span><a name="line.204"></a>
+<span class="sourceLineNo">205</span> public static class SuspendProcedure extends ProcedureTestingUtility.NoopProcedure<TestProcEnv> {<a name="line.205"></a>
+<span class="sourceLineNo">206</span> public SuspendProcedure() {<a name="line.206"></a>
+<span class="sourceLineNo">207</span> super();<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> private CountDownLatch latch = new CountDownLatch(1);<a name="line.210"></a>
+<span class="sourceLineNo">211</span><a name="line.211"></a>
+<span class="sourceLineNo">212</span> @Override<a name="line.212"></a>
+<span class="sourceLineNo">213</span> protected Procedure[] execute(final TestProcEnv env)<a name="line.213"></a>
+<span class="sourceLineNo">214</span> throws ProcedureSuspendedException {<a name="line.214"></a>
+<span class="sourceLineNo">215</span> // Always suspend the procedure<a name="line.215"></a>
+<span class="sourceLineNo">216</span> LOG.info("suspend here");<a name="line.216"></a>
+<span class="sourceLineNo">217</span> latch.countDown();<a name="line.217"></a>
+<span class="sourceLineNo">218</span> throw new ProcedureSuspendedException();<a name="line.218"></a>
+<span class="sourceLineNo">219</span> }<a name="line.219"></a>
+<span class="sourceLineNo">220</span> }<a name="line.220"></a>
+<span class="sourceLineNo">221</span><a name="line.221"></a>
+<span class="sourceLineNo">222</span> public static class RootProcedure extends ProcedureTestingUtility.NoopProcedure<TestProcEnv> {<a name="line.222"></a>
+<span class="sourceLineNo">223</span> private boolean childSpwaned = false;<a name="line.223"></a>
+<span class="sourceLineNo">224</span><a name="line.224"></a>
+<span class="sourceLineNo">225</span> public RootProcedure() {<a name="line.225"></a>
+<span class="sourceLineNo">226</span> super();<a name="line.226"></a>
+<span class="sourceLineNo">227</span> }<a name="line.227"></a>
+<span class="sourceLineNo">228</span><a name="line.228"></a>
+<span class="sourceLineNo">229</span> @Override<a name="line.229"></a>
+<span class="sourceLineNo">230</span> protected Procedure[] execute(final TestProcEnv env)<a name="line.230"></a>
+<span class="sourceLineNo">231</span> throws ProcedureSuspendedException {<a name="line.231"></a>
+<span class="sourceLineNo">232</span> if (!childSpwaned) {<a name="line.232"></a>
+<span class="sourceLineNo">233</span> childSpwaned = true;<a name="line.233"></a>
+<span class="sourceLineNo">234</span> return new Procedure[] {new SuspendProcedure()};<a name="line.234"></a>
+<span class="sourceLineNo">235</span> } else {<a name="line.235"></a>
+<span class="sourceLineNo">236</span> return null;<a name="line.236"></a>
+<span class="sourceLineNo">237</span> }<a name="line.237"></a>
+<span class="sourceLineNo">238</span> }<a name="line.238"></a>
+<span class="sourceLineNo">239</span> }<a name="line.239"></a>
+<span class="sourceLineNo">240</span><a name="line.240"></a>
+<span class="sourceLineNo">241</span><a name="line.241"></a>
+<span class="sourceLineNo">242</span>}<a name="line.242"></a>
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+</pre>
+</div>
+</body>
+</html>