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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 or more<a name="line.2"></a>
<span class="sourceLineNo">003</span> * contributor license agreements. See the NOTICE file distributed with<a name="line.3"></a>
<span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache license, Version 2.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<span class="sourceLineNo">007</span> * the License. You may obtain a copy of the License at<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<span class="sourceLineNo">014</span> * See the license for the specific language governing permissions and<a name="line.14"></a>
<span class="sourceLineNo">015</span> * limitations under the license.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span>package org.apache.logging.log4j.util;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.io.Serializable;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.text.DecimalFormat;<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>/**<a name="line.22"></a>
<span class="sourceLineNo">023</span> * Primarily used in unit tests, but can be used to track elapsed time for a request or portion of any other operation<a name="line.23"></a>
<span class="sourceLineNo">024</span> * so long as all the timer methods are called on the same thread in which it was started. Calling start on<a name="line.24"></a>
<span class="sourceLineNo">025</span> * multiple threads will cause the the times to be aggregated.<a name="line.25"></a>
<span class="sourceLineNo">026</span> */<a name="line.26"></a>
<span class="sourceLineNo">027</span>public class Timer implements Serializable, StringBuilderFormattable<a name="line.27"></a>
<span class="sourceLineNo">028</span>{<a name="line.28"></a>
<span class="sourceLineNo">029</span> private static final long serialVersionUID = 9175191792439630013L;<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span> private final String name; // The timer's name<a name="line.31"></a>
<span class="sourceLineNo">032</span> public enum Status {<a name="line.32"></a>
<span class="sourceLineNo">033</span> Started, Stopped, Paused<a name="line.33"></a>
<span class="sourceLineNo">034</span> }<a name="line.34"></a>
<span class="sourceLineNo">035</span> private Status status; // The timer's status<a name="line.35"></a>
<span class="sourceLineNo">036</span> private long elapsedTime; // The elapsed time<a name="line.36"></a>
<span class="sourceLineNo">037</span> private final int iterations;<a name="line.37"></a>
<span class="sourceLineNo">038</span> private static long NANO_PER_SECOND = 1000000000L;<a name="line.38"></a>
<span class="sourceLineNo">039</span> private static long NANO_PER_MINUTE = NANO_PER_SECOND * 60;<a name="line.39"></a>
<span class="sourceLineNo">040</span> private static long NANO_PER_HOUR = NANO_PER_MINUTE * 60;<a name="line.40"></a>
<span class="sourceLineNo">041</span> private ThreadLocal&lt;Long&gt; startTime = new ThreadLocal&lt;Long&gt;() {<a name="line.41"></a>
<span class="sourceLineNo">042</span> @Override protected Long initialValue() {<a name="line.42"></a>
<span class="sourceLineNo">043</span> return 0L;<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><a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span> /**<a name="line.48"></a>
<span class="sourceLineNo">049</span> * Constructor.<a name="line.49"></a>
<span class="sourceLineNo">050</span> * @param name the timer name.<a name="line.50"></a>
<span class="sourceLineNo">051</span> */<a name="line.51"></a>
<span class="sourceLineNo">052</span> public Timer(final String name)<a name="line.52"></a>
<span class="sourceLineNo">053</span> {<a name="line.53"></a>
<span class="sourceLineNo">054</span> this(name, 0);<a name="line.54"></a>
<span class="sourceLineNo">055</span> }<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span> /**<a name="line.57"></a>
<span class="sourceLineNo">058</span> * Constructor.<a name="line.58"></a>
<span class="sourceLineNo">059</span> *<a name="line.59"></a>
<span class="sourceLineNo">060</span> * @param name the timer name.<a name="line.60"></a>
<span class="sourceLineNo">061</span> */<a name="line.61"></a>
<span class="sourceLineNo">062</span> public Timer(final String name, final int iterations)<a name="line.62"></a>
<span class="sourceLineNo">063</span> {<a name="line.63"></a>
<span class="sourceLineNo">064</span> this.name = name;<a name="line.64"></a>
<span class="sourceLineNo">065</span> status = Status.Stopped;<a name="line.65"></a>
<span class="sourceLineNo">066</span> this.iterations = (iterations &gt; 0) ? iterations : 0;<a name="line.66"></a>
<span class="sourceLineNo">067</span> }<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>
<span class="sourceLineNo">069</span> /**<a name="line.69"></a>
<span class="sourceLineNo">070</span> * Start the timer.<a name="line.70"></a>
<span class="sourceLineNo">071</span> */<a name="line.71"></a>
<span class="sourceLineNo">072</span> public synchronized void start()<a name="line.72"></a>
<span class="sourceLineNo">073</span> {<a name="line.73"></a>
<span class="sourceLineNo">074</span> startTime.set(System.nanoTime());<a name="line.74"></a>
<span class="sourceLineNo">075</span> elapsedTime = 0;<a name="line.75"></a>
<span class="sourceLineNo">076</span> status = Status.Started;<a name="line.76"></a>
<span class="sourceLineNo">077</span> }<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span> public synchronized void startOrResume() {<a name="line.79"></a>
<span class="sourceLineNo">080</span> if (status == Status.Stopped) {<a name="line.80"></a>
<span class="sourceLineNo">081</span> start();<a name="line.81"></a>
<span class="sourceLineNo">082</span> } else {<a name="line.82"></a>
<span class="sourceLineNo">083</span> resume();<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> /**<a name="line.87"></a>
<span class="sourceLineNo">088</span> * Stop the timer.<a name="line.88"></a>
<span class="sourceLineNo">089</span> */<a name="line.89"></a>
<span class="sourceLineNo">090</span> public synchronized String stop()<a name="line.90"></a>
<span class="sourceLineNo">091</span> {<a name="line.91"></a>
<span class="sourceLineNo">092</span> elapsedTime += System.nanoTime() - startTime.get();<a name="line.92"></a>
<span class="sourceLineNo">093</span> startTime.set(0L);<a name="line.93"></a>
<span class="sourceLineNo">094</span> status = Status.Stopped;<a name="line.94"></a>
<span class="sourceLineNo">095</span> return toString();<a name="line.95"></a>
<span class="sourceLineNo">096</span> }<a name="line.96"></a>
<span class="sourceLineNo">097</span><a name="line.97"></a>
<span class="sourceLineNo">098</span> /**<a name="line.98"></a>
<span class="sourceLineNo">099</span> * Pause the timer.<a name="line.99"></a>
<span class="sourceLineNo">100</span> */<a name="line.100"></a>
<span class="sourceLineNo">101</span> public synchronized void pause()<a name="line.101"></a>
<span class="sourceLineNo">102</span> {<a name="line.102"></a>
<span class="sourceLineNo">103</span> elapsedTime += System.nanoTime() - startTime.get();<a name="line.103"></a>
<span class="sourceLineNo">104</span> startTime.set(0L);<a name="line.104"></a>
<span class="sourceLineNo">105</span> status = Status.Paused;<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> * Resume the timer.<a name="line.109"></a>
<span class="sourceLineNo">110</span> */<a name="line.110"></a>
<span class="sourceLineNo">111</span> public synchronized void resume()<a name="line.111"></a>
<span class="sourceLineNo">112</span> {<a name="line.112"></a>
<span class="sourceLineNo">113</span> startTime.set(System.nanoTime());<a name="line.113"></a>
<span class="sourceLineNo">114</span> status = Status.Started;<a name="line.114"></a>
<span class="sourceLineNo">115</span> }<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> * Accessor for the name.<a name="line.118"></a>
<span class="sourceLineNo">119</span> * @return the timer's name.<a name="line.119"></a>
<span class="sourceLineNo">120</span> */<a name="line.120"></a>
<span class="sourceLineNo">121</span> public String getName()<a name="line.121"></a>
<span class="sourceLineNo">122</span> {<a name="line.122"></a>
<span class="sourceLineNo">123</span> return name;<a name="line.123"></a>
<span class="sourceLineNo">124</span> }<a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
<span class="sourceLineNo">126</span> /**<a name="line.126"></a>
<span class="sourceLineNo">127</span> * Access the elapsed time.<a name="line.127"></a>
<span class="sourceLineNo">128</span> *<a name="line.128"></a>
<span class="sourceLineNo">129</span> * @return the elapsed time.<a name="line.129"></a>
<span class="sourceLineNo">130</span> */<a name="line.130"></a>
<span class="sourceLineNo">131</span> public long getElapsedTime()<a name="line.131"></a>
<span class="sourceLineNo">132</span> {<a name="line.132"></a>
<span class="sourceLineNo">133</span> return elapsedTime / 1000000;<a name="line.133"></a>
<span class="sourceLineNo">134</span> }<a name="line.134"></a>
<span class="sourceLineNo">135</span><a name="line.135"></a>
<span class="sourceLineNo">136</span> /**<a name="line.136"></a>
<span class="sourceLineNo">137</span> * Access the elapsed time.<a name="line.137"></a>
<span class="sourceLineNo">138</span> *<a name="line.138"></a>
<span class="sourceLineNo">139</span> * @return the elapsed time.<a name="line.139"></a>
<span class="sourceLineNo">140</span> */<a name="line.140"></a>
<span class="sourceLineNo">141</span> public long getElapsedNanoTime()<a name="line.141"></a>
<span class="sourceLineNo">142</span> {<a name="line.142"></a>
<span class="sourceLineNo">143</span> return elapsedTime;<a name="line.143"></a>
<span class="sourceLineNo">144</span> }<a name="line.144"></a>
<span class="sourceLineNo">145</span><a name="line.145"></a>
<span class="sourceLineNo">146</span> /**<a name="line.146"></a>
<span class="sourceLineNo">147</span> * Returns the name of the last operation performed on this timer (Start, Stop, Pause or<a name="line.147"></a>
<span class="sourceLineNo">148</span> * Resume).<a name="line.148"></a>
<span class="sourceLineNo">149</span> * @return the string representing the last operation performed.<a name="line.149"></a>
<span class="sourceLineNo">150</span> */<a name="line.150"></a>
<span class="sourceLineNo">151</span> public Status getStatus()<a name="line.151"></a>
<span class="sourceLineNo">152</span> {<a name="line.152"></a>
<span class="sourceLineNo">153</span> return status;<a name="line.153"></a>
<span class="sourceLineNo">154</span> }<a name="line.154"></a>
<span class="sourceLineNo">155</span><a name="line.155"></a>
<span class="sourceLineNo">156</span> /**<a name="line.156"></a>
<span class="sourceLineNo">157</span> * Returns the String representation of the timer based upon its current state<a name="line.157"></a>
<span class="sourceLineNo">158</span> */<a name="line.158"></a>
<span class="sourceLineNo">159</span> @Override<a name="line.159"></a>
<span class="sourceLineNo">160</span> public String toString()<a name="line.160"></a>
<span class="sourceLineNo">161</span> {<a name="line.161"></a>
<span class="sourceLineNo">162</span> final StringBuilder result = new StringBuilder();<a name="line.162"></a>
<span class="sourceLineNo">163</span> formatTo(result);<a name="line.163"></a>
<span class="sourceLineNo">164</span> return result.toString();<a name="line.164"></a>
<span class="sourceLineNo">165</span> }<a name="line.165"></a>
<span class="sourceLineNo">166</span><a name="line.166"></a>
<span class="sourceLineNo">167</span> @Override<a name="line.167"></a>
<span class="sourceLineNo">168</span> public void formatTo(final StringBuilder buffer) {<a name="line.168"></a>
<span class="sourceLineNo">169</span> buffer.append("Timer ").append(name);<a name="line.169"></a>
<span class="sourceLineNo">170</span> switch (status) {<a name="line.170"></a>
<span class="sourceLineNo">171</span> case Started:<a name="line.171"></a>
<span class="sourceLineNo">172</span> buffer.append(" started");<a name="line.172"></a>
<span class="sourceLineNo">173</span> break;<a name="line.173"></a>
<span class="sourceLineNo">174</span> case Paused:<a name="line.174"></a>
<span class="sourceLineNo">175</span> buffer.append(" paused");<a name="line.175"></a>
<span class="sourceLineNo">176</span> break;<a name="line.176"></a>
<span class="sourceLineNo">177</span> case Stopped:<a name="line.177"></a>
<span class="sourceLineNo">178</span> long nanoseconds = elapsedTime;<a name="line.178"></a>
<span class="sourceLineNo">179</span> // Get elapsed hours<a name="line.179"></a>
<span class="sourceLineNo">180</span> long hours = nanoseconds / NANO_PER_HOUR;<a name="line.180"></a>
<span class="sourceLineNo">181</span> // Get remaining nanoseconds<a name="line.181"></a>
<span class="sourceLineNo">182</span> nanoseconds = nanoseconds % NANO_PER_HOUR;<a name="line.182"></a>
<span class="sourceLineNo">183</span> // Get minutes<a name="line.183"></a>
<span class="sourceLineNo">184</span> long minutes = nanoseconds / NANO_PER_MINUTE;<a name="line.184"></a>
<span class="sourceLineNo">185</span> // Get remaining nanoseconds<a name="line.185"></a>
<span class="sourceLineNo">186</span> nanoseconds = nanoseconds % NANO_PER_MINUTE;<a name="line.186"></a>
<span class="sourceLineNo">187</span> // Get seconds<a name="line.187"></a>
<span class="sourceLineNo">188</span> long seconds = nanoseconds / NANO_PER_SECOND;<a name="line.188"></a>
<span class="sourceLineNo">189</span> // Get remaining nanoseconds<a name="line.189"></a>
<span class="sourceLineNo">190</span> nanoseconds = nanoseconds % NANO_PER_SECOND;<a name="line.190"></a>
<span class="sourceLineNo">191</span><a name="line.191"></a>
<span class="sourceLineNo">192</span> String elapsed = Strings.EMPTY;<a name="line.192"></a>
<span class="sourceLineNo">193</span><a name="line.193"></a>
<span class="sourceLineNo">194</span> if (hours &gt; 0) {<a name="line.194"></a>
<span class="sourceLineNo">195</span> elapsed += hours + " hours ";<a name="line.195"></a>
<span class="sourceLineNo">196</span> }<a name="line.196"></a>
<span class="sourceLineNo">197</span> if (minutes &gt; 0 || hours &gt; 0) {<a name="line.197"></a>
<span class="sourceLineNo">198</span> elapsed += minutes + " minutes ";<a name="line.198"></a>
<span class="sourceLineNo">199</span> }<a name="line.199"></a>
<span class="sourceLineNo">200</span><a name="line.200"></a>
<span class="sourceLineNo">201</span> DecimalFormat numFormat;<a name="line.201"></a>
<span class="sourceLineNo">202</span> numFormat = new DecimalFormat("#0");<a name="line.202"></a>
<span class="sourceLineNo">203</span> elapsed += numFormat.format(seconds) + '.';<a name="line.203"></a>
<span class="sourceLineNo">204</span> numFormat = new DecimalFormat("000000000");<a name="line.204"></a>
<span class="sourceLineNo">205</span> elapsed += numFormat.format(nanoseconds) + " seconds";<a name="line.205"></a>
<span class="sourceLineNo">206</span> buffer.append(" stopped. Elapsed time: ").append(elapsed);<a name="line.206"></a>
<span class="sourceLineNo">207</span> if (iterations &gt; 0) {<a name="line.207"></a>
<span class="sourceLineNo">208</span> nanoseconds = elapsedTime / iterations;<a name="line.208"></a>
<span class="sourceLineNo">209</span> // Get elapsed hours<a name="line.209"></a>
<span class="sourceLineNo">210</span> hours = nanoseconds / NANO_PER_HOUR;<a name="line.210"></a>
<span class="sourceLineNo">211</span> // Get remaining nanoseconds<a name="line.211"></a>
<span class="sourceLineNo">212</span> nanoseconds = nanoseconds % NANO_PER_HOUR;<a name="line.212"></a>
<span class="sourceLineNo">213</span> // Get minutes<a name="line.213"></a>
<span class="sourceLineNo">214</span> minutes = nanoseconds / NANO_PER_MINUTE;<a name="line.214"></a>
<span class="sourceLineNo">215</span> // Get remaining nanoseconds<a name="line.215"></a>
<span class="sourceLineNo">216</span> nanoseconds = nanoseconds % NANO_PER_MINUTE;<a name="line.216"></a>
<span class="sourceLineNo">217</span> // Get seconds<a name="line.217"></a>
<span class="sourceLineNo">218</span> seconds = nanoseconds / NANO_PER_SECOND;<a name="line.218"></a>
<span class="sourceLineNo">219</span> // Get remaining nanoseconds<a name="line.219"></a>
<span class="sourceLineNo">220</span> nanoseconds = nanoseconds % NANO_PER_SECOND;<a name="line.220"></a>
<span class="sourceLineNo">221</span><a name="line.221"></a>
<span class="sourceLineNo">222</span> elapsed = Strings.EMPTY;<a name="line.222"></a>
<span class="sourceLineNo">223</span><a name="line.223"></a>
<span class="sourceLineNo">224</span> if (hours &gt; 0) {<a name="line.224"></a>
<span class="sourceLineNo">225</span> elapsed += hours + " hours ";<a name="line.225"></a>
<span class="sourceLineNo">226</span> }<a name="line.226"></a>
<span class="sourceLineNo">227</span> if (minutes &gt; 0 || hours &gt; 0) {<a name="line.227"></a>
<span class="sourceLineNo">228</span> elapsed += minutes + " minutes ";<a name="line.228"></a>
<span class="sourceLineNo">229</span> }<a name="line.229"></a>
<span class="sourceLineNo">230</span><a name="line.230"></a>
<span class="sourceLineNo">231</span> numFormat = new DecimalFormat("#0");<a name="line.231"></a>
<span class="sourceLineNo">232</span> elapsed += numFormat.format(seconds) + '.';<a name="line.232"></a>
<span class="sourceLineNo">233</span> numFormat = new DecimalFormat("000000000");<a name="line.233"></a>
<span class="sourceLineNo">234</span> elapsed += numFormat.format(nanoseconds) + " seconds";<a name="line.234"></a>
<span class="sourceLineNo">235</span> buffer.append(" Average per iteration: ").append(elapsed);<a name="line.235"></a>
<span class="sourceLineNo">236</span> }<a name="line.236"></a>
<span class="sourceLineNo">237</span> break;<a name="line.237"></a>
<span class="sourceLineNo">238</span> default:<a name="line.238"></a>
<span class="sourceLineNo">239</span> buffer.append(' ').append(status);<a name="line.239"></a>
<span class="sourceLineNo">240</span> break;<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>
<span class="sourceLineNo">243</span><a name="line.243"></a>
<span class="sourceLineNo">244</span> @Override<a name="line.244"></a>
<span class="sourceLineNo">245</span> public boolean equals(final Object o) {<a name="line.245"></a>
<span class="sourceLineNo">246</span> if (this == o) {<a name="line.246"></a>
<span class="sourceLineNo">247</span> return true;<a name="line.247"></a>
<span class="sourceLineNo">248</span> }<a name="line.248"></a>
<span class="sourceLineNo">249</span> if (!(o instanceof Timer)) {<a name="line.249"></a>
<span class="sourceLineNo">250</span> return false;<a name="line.250"></a>
<span class="sourceLineNo">251</span> }<a name="line.251"></a>
<span class="sourceLineNo">252</span><a name="line.252"></a>
<span class="sourceLineNo">253</span> final Timer timer = (Timer) o;<a name="line.253"></a>
<span class="sourceLineNo">254</span><a name="line.254"></a>
<span class="sourceLineNo">255</span> if (elapsedTime != timer.elapsedTime) {<a name="line.255"></a>
<span class="sourceLineNo">256</span> return false;<a name="line.256"></a>
<span class="sourceLineNo">257</span> }<a name="line.257"></a>
<span class="sourceLineNo">258</span> if (startTime != timer.startTime) {<a name="line.258"></a>
<span class="sourceLineNo">259</span> return false;<a name="line.259"></a>
<span class="sourceLineNo">260</span> }<a name="line.260"></a>
<span class="sourceLineNo">261</span> if (name != null ? !name.equals(timer.name) : timer.name != null) {<a name="line.261"></a>
<span class="sourceLineNo">262</span> return false;<a name="line.262"></a>
<span class="sourceLineNo">263</span> }<a name="line.263"></a>
<span class="sourceLineNo">264</span> if (status != null ? !status.equals(timer.status) : timer.status != null) {<a name="line.264"></a>
<span class="sourceLineNo">265</span> return false;<a name="line.265"></a>
<span class="sourceLineNo">266</span> }<a name="line.266"></a>
<span class="sourceLineNo">267</span><a name="line.267"></a>
<span class="sourceLineNo">268</span> return true;<a name="line.268"></a>
<span class="sourceLineNo">269</span> }<a name="line.269"></a>
<span class="sourceLineNo">270</span><a name="line.270"></a>
<span class="sourceLineNo">271</span> @Override<a name="line.271"></a>
<span class="sourceLineNo">272</span> public int hashCode() {<a name="line.272"></a>
<span class="sourceLineNo">273</span> int result;<a name="line.273"></a>
<span class="sourceLineNo">274</span> result = (name != null ? name.hashCode() : 0);<a name="line.274"></a>
<span class="sourceLineNo">275</span> result = 29 * result + (status != null ? status.hashCode() : 0);<a name="line.275"></a>
<span class="sourceLineNo">276</span> long time = startTime.get();<a name="line.276"></a>
<span class="sourceLineNo">277</span> result = 29 * result + (int) (time ^ (time &gt;&gt;&gt; 32));<a name="line.277"></a>
<span class="sourceLineNo">278</span> result = 29 * result + (int) (elapsedTime ^ (elapsedTime &gt;&gt;&gt; 32));<a name="line.278"></a>
<span class="sourceLineNo">279</span> return result;<a name="line.279"></a>
<span class="sourceLineNo">280</span> }<a name="line.280"></a>
<span class="sourceLineNo">281</span><a name="line.281"></a>
<span class="sourceLineNo">282</span>}<a name="line.282"></a>
</pre>
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