| <!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.util;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import org.apache.hadoop.hbase.Stoppable;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import org.slf4j.Logger;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import org.slf4j.LoggerFactory;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span><a name="line.24"></a> |
| <span class="sourceLineNo">025</span>/**<a name="line.25"></a> |
| <span class="sourceLineNo">026</span> * Sleeper for current thread. Sleeps for passed period. Also checks passed boolean and if<a name="line.26"></a> |
| <span class="sourceLineNo">027</span> * interrupted, will return if the flag is set (rather than go back to sleep until its sleep time is<a name="line.27"></a> |
| <span class="sourceLineNo">028</span> * up).<a name="line.28"></a> |
| <span class="sourceLineNo">029</span> */<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>@InterfaceAudience.Private<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>public class Sleeper {<a name="line.31"></a> |
| <span class="sourceLineNo">032</span> private static final Logger LOG = LoggerFactory.getLogger(Sleeper.class);<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> private final int period;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span> private final Stoppable stopper;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span> private static final long MINIMAL_DELTA_FOR_LOGGING = 10000;<a name="line.35"></a> |
| <span class="sourceLineNo">036</span><a name="line.36"></a> |
| <span class="sourceLineNo">037</span> private final Object sleepLock = new Object();<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> private boolean triggerWake = false;<a name="line.38"></a> |
| <span class="sourceLineNo">039</span><a name="line.39"></a> |
| <span class="sourceLineNo">040</span> /**<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> * @param sleep sleep time in milliseconds<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * @param stopper When {@link Stoppable#isStopped()} is true, this thread will cleanup and exit<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> * cleanly.<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> */<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> public Sleeper(final int sleep, final Stoppable stopper) {<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> this.period = sleep;<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> this.stopper = stopper;<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> }<a name="line.48"></a> |
| <span class="sourceLineNo">049</span><a name="line.49"></a> |
| <span class="sourceLineNo">050</span> /**<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> * If currently asleep, stops sleeping; if not asleep, will skip the next sleep cycle.<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> */<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> public void skipSleepCycle() {<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> synchronized (sleepLock) {<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> triggerWake = true;<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> sleepLock.notifyAll();<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> }<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> }<a name="line.58"></a> |
| <span class="sourceLineNo">059</span><a name="line.59"></a> |
| <span class="sourceLineNo">060</span> /**<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> * Sleep for period.<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> */<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> public void sleep() {<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> sleep(this.period);<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> }<a name="line.65"></a> |
| <span class="sourceLineNo">066</span><a name="line.66"></a> |
| <span class="sourceLineNo">067</span> public void sleep(long sleepTime) {<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> if (this.stopper.isStopped()) {<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> return;<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> }<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> long now = EnvironmentEdgeManager.currentTime();<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> long currentSleepTime = sleepTime;<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> while (currentSleepTime > 0) {<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> long woke = -1;<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> try {<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> synchronized (sleepLock) {<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> if (triggerWake) {<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> break;<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> }<a name="line.79"></a> |
| <span class="sourceLineNo">080</span><a name="line.80"></a> |
| <span class="sourceLineNo">081</span> sleepLock.wait(currentSleepTime);<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> }<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> woke = EnvironmentEdgeManager.currentTime();<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> long slept = woke - now;<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> if (slept - this.period > MINIMAL_DELTA_FOR_LOGGING) {<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> LOG.warn(<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> "We slept {}ms instead of {}ms, this is likely due to a long "<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> + "garbage collecting pause and it's usually bad, see "<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> + "http://hbase.apache.org/book.html#trouble.rs.runtime.zkexpired",<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> slept, this.period);<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> }<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> } catch (InterruptedException iex) {<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> // We we interrupted because we're meant to stop? If not, just<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> // continue ignoring the interruption<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> if (this.stopper.isStopped()) {<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> return;<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> // Recalculate waitTime.<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> woke = (woke == -1) ? EnvironmentEdgeManager.currentTime() : woke;<a name="line.100"></a> |
| <span class="sourceLineNo">101</span> currentSleepTime = this.period - (woke - now);<a name="line.101"></a> |
| <span class="sourceLineNo">102</span> }<a name="line.102"></a> |
| <span class="sourceLineNo">103</span> synchronized (sleepLock) {<a name="line.103"></a> |
| <span class="sourceLineNo">104</span> triggerWake = false;<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> /** Returns the sleep period in milliseconds */<a name="line.108"></a> |
| <span class="sourceLineNo">109</span> public final int getPeriod() {<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> return period;<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> }<a name="line.111"></a> |
| <span class="sourceLineNo">112</span>}<a name="line.112"></a> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| </pre> |
| </div> |
| </body> |
| </html> |
