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<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<span class="sourceLineNo">011</span> *<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>package org.apache.hadoop.hbase;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.Map.Entry;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.Properties;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.Set;<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.apache.commons.lang3.StringUtils;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.hadoop.conf.Configuration;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.chaos.factories.MonkeyConstants;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.chaos.factories.MonkeyFactory;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.chaos.monkies.ChaosMonkey;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.util.AbstractHBaseTool;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.junit.After;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.junit.Before;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.slf4j.Logger;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.slf4j.LoggerFactory;<a name="line.35"></a>
<span class="sourceLineNo">036</span><a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hbase.thirdparty.org.apache.commons.cli.CommandLine;<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> * Base class for HBase integration tests that want to use the Chaos Monkey.<a name="line.40"></a>
<span class="sourceLineNo">041</span> * Usage: bin/hbase &amp;lt;sub_class_of_IntegrationTestBase&gt; &amp;lt;options&gt;<a name="line.41"></a>
<span class="sourceLineNo">042</span> * Options: -h,--help Show usage<a name="line.42"></a>
<span class="sourceLineNo">043</span> * -m,--monkey &amp;lt;arg&gt; Which chaos monkey to run<a name="line.43"></a>
<span class="sourceLineNo">044</span> * -monkeyProps &amp;lt;arg&gt; The properties file for specifying chaos monkey properties.<a name="line.44"></a>
<span class="sourceLineNo">045</span> * -ncc Option to not clean up the cluster at the end.<a name="line.45"></a>
<span class="sourceLineNo">046</span> */<a name="line.46"></a>
<span class="sourceLineNo">047</span>public abstract class IntegrationTestBase extends AbstractHBaseTool {<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span> public static final String NO_CLUSTER_CLEANUP_LONG_OPT = "noClusterCleanUp";<a name="line.49"></a>
<span class="sourceLineNo">050</span> public static final String MONKEY_LONG_OPT = "monkey";<a name="line.50"></a>
<span class="sourceLineNo">051</span> public static final String CHAOS_MONKEY_PROPS = "monkeyProps";<a name="line.51"></a>
<span class="sourceLineNo">052</span> private static final Logger LOG = LoggerFactory.getLogger(IntegrationTestBase.class);<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span> protected IntegrationTestingUtility util;<a name="line.54"></a>
<span class="sourceLineNo">055</span> protected ChaosMonkey monkey;<a name="line.55"></a>
<span class="sourceLineNo">056</span> protected String monkeyToUse;<a name="line.56"></a>
<span class="sourceLineNo">057</span> protected Properties monkeyProps;<a name="line.57"></a>
<span class="sourceLineNo">058</span> protected boolean noClusterCleanUp = false;<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span> public IntegrationTestBase() {<a name="line.60"></a>
<span class="sourceLineNo">061</span> this(null);<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> public IntegrationTestBase(String monkeyToUse) {<a name="line.64"></a>
<span class="sourceLineNo">065</span> this.monkeyToUse = monkeyToUse;<a name="line.65"></a>
<span class="sourceLineNo">066</span> }<a name="line.66"></a>
<span class="sourceLineNo">067</span><a name="line.67"></a>
<span class="sourceLineNo">068</span> @Override<a name="line.68"></a>
<span class="sourceLineNo">069</span> protected void addOptions() {<a name="line.69"></a>
<span class="sourceLineNo">070</span> addOptWithArg("m", MONKEY_LONG_OPT, "Which chaos monkey to run");<a name="line.70"></a>
<span class="sourceLineNo">071</span> addOptNoArg("ncc", NO_CLUSTER_CLEANUP_LONG_OPT,<a name="line.71"></a>
<span class="sourceLineNo">072</span> "Don't clean up the cluster at the end");<a name="line.72"></a>
<span class="sourceLineNo">073</span> addOptWithArg(CHAOS_MONKEY_PROPS, "The properties file for specifying chaos "<a name="line.73"></a>
<span class="sourceLineNo">074</span> + "monkey properties.");<a name="line.74"></a>
<span class="sourceLineNo">075</span> }<a name="line.75"></a>
<span class="sourceLineNo">076</span><a name="line.76"></a>
<span class="sourceLineNo">077</span> /**<a name="line.77"></a>
<span class="sourceLineNo">078</span> * This allows tests that subclass children of this base class such as<a name="line.78"></a>
<span class="sourceLineNo">079</span> * {@link org.apache.hadoop.hbase.test.IntegrationTestReplication} to<a name="line.79"></a>
<span class="sourceLineNo">080</span> * include the base options without having to also include the options from the test.<a name="line.80"></a>
<span class="sourceLineNo">081</span> *<a name="line.81"></a>
<span class="sourceLineNo">082</span> * @param cmd the command line<a name="line.82"></a>
<span class="sourceLineNo">083</span> */<a name="line.83"></a>
<span class="sourceLineNo">084</span> protected void processBaseOptions(CommandLine cmd) {<a name="line.84"></a>
<span class="sourceLineNo">085</span> if (cmd.hasOption(MONKEY_LONG_OPT)) {<a name="line.85"></a>
<span class="sourceLineNo">086</span> monkeyToUse = cmd.getOptionValue(MONKEY_LONG_OPT);<a name="line.86"></a>
<span class="sourceLineNo">087</span> }<a name="line.87"></a>
<span class="sourceLineNo">088</span> if (cmd.hasOption(NO_CLUSTER_CLEANUP_LONG_OPT)) {<a name="line.88"></a>
<span class="sourceLineNo">089</span> noClusterCleanUp = true;<a name="line.89"></a>
<span class="sourceLineNo">090</span> }<a name="line.90"></a>
<span class="sourceLineNo">091</span> monkeyProps = new Properties();<a name="line.91"></a>
<span class="sourceLineNo">092</span> // Add entries for the CM from hbase-site.xml as a convenience.<a name="line.92"></a>
<span class="sourceLineNo">093</span> // Do this prior to loading from the properties file to make sure those in the properties<a name="line.93"></a>
<span class="sourceLineNo">094</span> // file are given precedence to those in hbase-site.xml (backwards compatibility).<a name="line.94"></a>
<span class="sourceLineNo">095</span> loadMonkeyProperties(monkeyProps, conf);<a name="line.95"></a>
<span class="sourceLineNo">096</span> if (cmd.hasOption(CHAOS_MONKEY_PROPS)) {<a name="line.96"></a>
<span class="sourceLineNo">097</span> String chaosMonkeyPropsFile = cmd.getOptionValue(CHAOS_MONKEY_PROPS);<a name="line.97"></a>
<span class="sourceLineNo">098</span> if (StringUtils.isNotEmpty(chaosMonkeyPropsFile)) {<a name="line.98"></a>
<span class="sourceLineNo">099</span> try {<a name="line.99"></a>
<span class="sourceLineNo">100</span> monkeyProps.load(this.getClass().getClassLoader()<a name="line.100"></a>
<span class="sourceLineNo">101</span> .getResourceAsStream(chaosMonkeyPropsFile));<a name="line.101"></a>
<span class="sourceLineNo">102</span> } catch (IOException e) {<a name="line.102"></a>
<span class="sourceLineNo">103</span> LOG.warn("Failed load of monkey properties {} from CLASSPATH", chaosMonkeyPropsFile, e);<a name="line.103"></a>
<span class="sourceLineNo">104</span> System.exit(EXIT_FAILURE);<a name="line.104"></a>
<span class="sourceLineNo">105</span> }<a name="line.105"></a>
<span class="sourceLineNo">106</span> }<a name="line.106"></a>
<span class="sourceLineNo">107</span> }<a name="line.107"></a>
<span class="sourceLineNo">108</span> }<a name="line.108"></a>
<span class="sourceLineNo">109</span><a name="line.109"></a>
<span class="sourceLineNo">110</span> /**<a name="line.110"></a>
<span class="sourceLineNo">111</span> * Loads entries from the provided {@code conf} into {@code props} when the configuration key<a name="line.111"></a>
<span class="sourceLineNo">112</span> * is one that may be configuring ChaosMonkey actions.<a name="line.112"></a>
<span class="sourceLineNo">113</span> */<a name="line.113"></a>
<span class="sourceLineNo">114</span> public static void loadMonkeyProperties(Properties props, Configuration conf) {<a name="line.114"></a>
<span class="sourceLineNo">115</span> for (Entry&lt;String,String&gt; entry : conf) {<a name="line.115"></a>
<span class="sourceLineNo">116</span> for (String prefix : MonkeyConstants.MONKEY_CONFIGURATION_KEY_PREFIXES) {<a name="line.116"></a>
<span class="sourceLineNo">117</span> if (entry.getKey().startsWith(prefix)) {<a name="line.117"></a>
<span class="sourceLineNo">118</span> props.put(entry.getKey(), entry.getValue());<a name="line.118"></a>
<span class="sourceLineNo">119</span> break;<a name="line.119"></a>
<span class="sourceLineNo">120</span> }<a name="line.120"></a>
<span class="sourceLineNo">121</span> }<a name="line.121"></a>
<span class="sourceLineNo">122</span> }<a name="line.122"></a>
<span class="sourceLineNo">123</span> }<a name="line.123"></a>
<span class="sourceLineNo">124</span><a name="line.124"></a>
<span class="sourceLineNo">125</span> @Override<a name="line.125"></a>
<span class="sourceLineNo">126</span> protected void processOptions(CommandLine cmd) {<a name="line.126"></a>
<span class="sourceLineNo">127</span> processBaseOptions(cmd);<a name="line.127"></a>
<span class="sourceLineNo">128</span> }<a name="line.128"></a>
<span class="sourceLineNo">129</span><a name="line.129"></a>
<span class="sourceLineNo">130</span> @Override<a name="line.130"></a>
<span class="sourceLineNo">131</span> public Configuration getConf() {<a name="line.131"></a>
<span class="sourceLineNo">132</span> Configuration c = super.getConf();<a name="line.132"></a>
<span class="sourceLineNo">133</span> if (c == null &amp;&amp; util != null) {<a name="line.133"></a>
<span class="sourceLineNo">134</span> conf = util.getConfiguration();<a name="line.134"></a>
<span class="sourceLineNo">135</span> c = conf;<a name="line.135"></a>
<span class="sourceLineNo">136</span> }<a name="line.136"></a>
<span class="sourceLineNo">137</span> return c;<a name="line.137"></a>
<span class="sourceLineNo">138</span> }<a name="line.138"></a>
<span class="sourceLineNo">139</span><a name="line.139"></a>
<span class="sourceLineNo">140</span> @Override<a name="line.140"></a>
<span class="sourceLineNo">141</span> protected int doWork() throws Exception {<a name="line.141"></a>
<span class="sourceLineNo">142</span> ChoreService choreService = null;<a name="line.142"></a>
<span class="sourceLineNo">143</span><a name="line.143"></a>
<span class="sourceLineNo">144</span> // Launches chore for refreshing kerberos credentials if security is enabled.<a name="line.144"></a>
<span class="sourceLineNo">145</span> // Please see http://hbase.apache.org/book.html#_running_canary_in_a_kerberos_enabled_cluster<a name="line.145"></a>
<span class="sourceLineNo">146</span> // for more details.<a name="line.146"></a>
<span class="sourceLineNo">147</span> final ScheduledChore authChore = AuthUtil.getAuthChore(conf);<a name="line.147"></a>
<span class="sourceLineNo">148</span> if (authChore != null) {<a name="line.148"></a>
<span class="sourceLineNo">149</span> choreService = new ChoreService("INTEGRATION_TEST");<a name="line.149"></a>
<span class="sourceLineNo">150</span> choreService.scheduleChore(authChore);<a name="line.150"></a>
<span class="sourceLineNo">151</span> }<a name="line.151"></a>
<span class="sourceLineNo">152</span><a name="line.152"></a>
<span class="sourceLineNo">153</span> setUp();<a name="line.153"></a>
<span class="sourceLineNo">154</span> int result = -1;<a name="line.154"></a>
<span class="sourceLineNo">155</span> try {<a name="line.155"></a>
<span class="sourceLineNo">156</span> result = runTestFromCommandLine();<a name="line.156"></a>
<span class="sourceLineNo">157</span> } finally {<a name="line.157"></a>
<span class="sourceLineNo">158</span> cleanUp();<a name="line.158"></a>
<span class="sourceLineNo">159</span> }<a name="line.159"></a>
<span class="sourceLineNo">160</span><a name="line.160"></a>
<span class="sourceLineNo">161</span> if (choreService != null) {<a name="line.161"></a>
<span class="sourceLineNo">162</span> choreService.shutdown();<a name="line.162"></a>
<span class="sourceLineNo">163</span> }<a name="line.163"></a>
<span class="sourceLineNo">164</span><a name="line.164"></a>
<span class="sourceLineNo">165</span> return result;<a name="line.165"></a>
<span class="sourceLineNo">166</span> }<a name="line.166"></a>
<span class="sourceLineNo">167</span><a name="line.167"></a>
<span class="sourceLineNo">168</span> @Before<a name="line.168"></a>
<span class="sourceLineNo">169</span> public void setUp() throws Exception {<a name="line.169"></a>
<span class="sourceLineNo">170</span> setUpCluster();<a name="line.170"></a>
<span class="sourceLineNo">171</span> setUpMonkey();<a name="line.171"></a>
<span class="sourceLineNo">172</span> }<a name="line.172"></a>
<span class="sourceLineNo">173</span><a name="line.173"></a>
<span class="sourceLineNo">174</span> @After<a name="line.174"></a>
<span class="sourceLineNo">175</span> public void cleanUp() throws Exception {<a name="line.175"></a>
<span class="sourceLineNo">176</span> cleanUpMonkey();<a name="line.176"></a>
<span class="sourceLineNo">177</span> cleanUpCluster();<a name="line.177"></a>
<span class="sourceLineNo">178</span> }<a name="line.178"></a>
<span class="sourceLineNo">179</span><a name="line.179"></a>
<span class="sourceLineNo">180</span> public void setUpMonkey() throws Exception {<a name="line.180"></a>
<span class="sourceLineNo">181</span> util = getTestingUtil(getConf());<a name="line.181"></a>
<span class="sourceLineNo">182</span> MonkeyFactory fact = MonkeyFactory.getFactory(monkeyToUse);<a name="line.182"></a>
<span class="sourceLineNo">183</span> if (fact == null) {<a name="line.183"></a>
<span class="sourceLineNo">184</span> fact = getDefaultMonkeyFactory();<a name="line.184"></a>
<span class="sourceLineNo">185</span> }<a name="line.185"></a>
<span class="sourceLineNo">186</span> LOG.info("Using chaos monkey factory: {}", fact.getClass());<a name="line.186"></a>
<span class="sourceLineNo">187</span> monkey = fact.setUtil(util)<a name="line.187"></a>
<span class="sourceLineNo">188</span> .setTableName(getTablename())<a name="line.188"></a>
<span class="sourceLineNo">189</span> .setProperties(monkeyProps)<a name="line.189"></a>
<span class="sourceLineNo">190</span> .setColumnFamilies(getColumnFamilies()).build();<a name="line.190"></a>
<span class="sourceLineNo">191</span> startMonkey();<a name="line.191"></a>
<span class="sourceLineNo">192</span> }<a name="line.192"></a>
<span class="sourceLineNo">193</span><a name="line.193"></a>
<span class="sourceLineNo">194</span> protected MonkeyFactory getDefaultMonkeyFactory() {<a name="line.194"></a>
<span class="sourceLineNo">195</span> // Run with no monkey in distributed context, with real monkey in local test context.<a name="line.195"></a>
<span class="sourceLineNo">196</span> return MonkeyFactory.getFactory(<a name="line.196"></a>
<span class="sourceLineNo">197</span> util.isDistributedCluster() ? MonkeyFactory.CALM : MonkeyFactory.SLOW_DETERMINISTIC);<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> protected void startMonkey() throws Exception {<a name="line.200"></a>
<span class="sourceLineNo">201</span> monkey.start();<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> public void cleanUpMonkey() throws Exception {<a name="line.204"></a>
<span class="sourceLineNo">205</span> cleanUpMonkey("Ending test");<a name="line.205"></a>
<span class="sourceLineNo">206</span> }<a name="line.206"></a>
<span class="sourceLineNo">207</span><a name="line.207"></a>
<span class="sourceLineNo">208</span> protected void cleanUpMonkey(String why) throws Exception {<a name="line.208"></a>
<span class="sourceLineNo">209</span> if (monkey != null &amp;&amp; !monkey.isStopped()) {<a name="line.209"></a>
<span class="sourceLineNo">210</span> monkey.stop(why);<a name="line.210"></a>
<span class="sourceLineNo">211</span> monkey.waitForStop();<a name="line.211"></a>
<span class="sourceLineNo">212</span> }<a name="line.212"></a>
<span class="sourceLineNo">213</span> }<a name="line.213"></a>
<span class="sourceLineNo">214</span><a name="line.214"></a>
<span class="sourceLineNo">215</span> protected IntegrationTestingUtility getTestingUtil(Configuration conf) {<a name="line.215"></a>
<span class="sourceLineNo">216</span> if (this.util == null) {<a name="line.216"></a>
<span class="sourceLineNo">217</span> if (conf == null) {<a name="line.217"></a>
<span class="sourceLineNo">218</span> this.util = new IntegrationTestingUtility();<a name="line.218"></a>
<span class="sourceLineNo">219</span> this.setConf(util.getConfiguration());<a name="line.219"></a>
<span class="sourceLineNo">220</span> } else {<a name="line.220"></a>
<span class="sourceLineNo">221</span> this.util = new IntegrationTestingUtility(conf);<a name="line.221"></a>
<span class="sourceLineNo">222</span> }<a name="line.222"></a>
<span class="sourceLineNo">223</span> }<a name="line.223"></a>
<span class="sourceLineNo">224</span> return util;<a name="line.224"></a>
<span class="sourceLineNo">225</span> }<a name="line.225"></a>
<span class="sourceLineNo">226</span><a name="line.226"></a>
<span class="sourceLineNo">227</span> public abstract void setUpCluster() throws Exception;<a name="line.227"></a>
<span class="sourceLineNo">228</span><a name="line.228"></a>
<span class="sourceLineNo">229</span> public void cleanUpCluster() throws Exception {<a name="line.229"></a>
<span class="sourceLineNo">230</span> if (util.isDistributedCluster() &amp;&amp; (monkey == null || !monkey.isDestructive())) {<a name="line.230"></a>
<span class="sourceLineNo">231</span> noClusterCleanUp = true;<a name="line.231"></a>
<span class="sourceLineNo">232</span> }<a name="line.232"></a>
<span class="sourceLineNo">233</span> if (noClusterCleanUp) {<a name="line.233"></a>
<span class="sourceLineNo">234</span> LOG.debug("noClusterCleanUp is set, skip restoring the cluster");<a name="line.234"></a>
<span class="sourceLineNo">235</span> return;<a name="line.235"></a>
<span class="sourceLineNo">236</span> }<a name="line.236"></a>
<span class="sourceLineNo">237</span> LOG.debug("Restoring the cluster");<a name="line.237"></a>
<span class="sourceLineNo">238</span> util.restoreCluster();<a name="line.238"></a>
<span class="sourceLineNo">239</span> LOG.debug("Done restoring the cluster");<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> public abstract int runTestFromCommandLine() throws Exception;<a name="line.242"></a>
<span class="sourceLineNo">243</span><a name="line.243"></a>
<span class="sourceLineNo">244</span> /**<a name="line.244"></a>
<span class="sourceLineNo">245</span> * Provides the name of the table that is protected from random Chaos monkey activity<a name="line.245"></a>
<span class="sourceLineNo">246</span> * @return table to not delete.<a name="line.246"></a>
<span class="sourceLineNo">247</span> */<a name="line.247"></a>
<span class="sourceLineNo">248</span> public abstract TableName getTablename();<a name="line.248"></a>
<span class="sourceLineNo">249</span><a name="line.249"></a>
<span class="sourceLineNo">250</span> /**<a name="line.250"></a>
<span class="sourceLineNo">251</span> * Provides the name of the CFs that are protected from random Chaos monkey activity (alter)<a name="line.251"></a>
<span class="sourceLineNo">252</span> * @return set of cf names to protect.<a name="line.252"></a>
<span class="sourceLineNo">253</span> */<a name="line.253"></a>
<span class="sourceLineNo">254</span> protected abstract Set&lt;String&gt; getColumnFamilies();<a name="line.254"></a>
<span class="sourceLineNo">255</span>}<a name="line.255"></a>
</pre>
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