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| <pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> |
| <span class="sourceLineNo">002</span> *<a name="line.2"></a> |
| <span class="sourceLineNo">003</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.3"></a> |
| <span class="sourceLineNo">004</span> * or more contributor license agreements. See the NOTICE file<a name="line.4"></a> |
| <span class="sourceLineNo">005</span> * distributed with this work for additional information<a name="line.5"></a> |
| <span class="sourceLineNo">006</span> * regarding copyright ownership. The ASF licenses this file<a name="line.6"></a> |
| <span class="sourceLineNo">007</span> * to you under the Apache License, Version 2.0 (the<a name="line.7"></a> |
| <span class="sourceLineNo">008</span> * "License"); you may not use this file except in compliance<a name="line.8"></a> |
| <span class="sourceLineNo">009</span> * with the License. You may obtain a copy of the License at<a name="line.9"></a> |
| <span class="sourceLineNo">010</span> *<a name="line.10"></a> |
| <span class="sourceLineNo">011</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.11"></a> |
| <span class="sourceLineNo">012</span> *<a name="line.12"></a> |
| <span class="sourceLineNo">013</span> * Unless required by applicable law or agreed to in writing, software<a name="line.13"></a> |
| <span class="sourceLineNo">014</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.14"></a> |
| <span class="sourceLineNo">015</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.15"></a> |
| <span class="sourceLineNo">016</span> * See the License for the specific language governing permissions and<a name="line.16"></a> |
| <span class="sourceLineNo">017</span> * limitations under the License.<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.util;<a name="line.19"></a> |
| <span class="sourceLineNo">020</span><a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import com.codahale.metrics.Histogram;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import com.codahale.metrics.Reservoir;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import com.codahale.metrics.Snapshot;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.lang.reflect.Constructor;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.text.DecimalFormat;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span><a name="line.27"></a> |
| <span class="sourceLineNo">028</span>/** Utility functions for working with Yammer Metrics. */<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>@InterfaceAudience.Private<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>public final class YammerHistogramUtils {<a name="line.30"></a> |
| <span class="sourceLineNo">031</span><a name="line.31"></a> |
| <span class="sourceLineNo">032</span> // not for public consumption<a name="line.32"></a> |
| <span class="sourceLineNo">033</span> private YammerHistogramUtils() {}<a name="line.33"></a> |
| <span class="sourceLineNo">034</span><a name="line.34"></a> |
| <span class="sourceLineNo">035</span> /**<a name="line.35"></a> |
| <span class="sourceLineNo">036</span> * Used formatting doubles so only two places after decimal point.<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> */<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> private static DecimalFormat DOUBLE_FORMAT = new DecimalFormat("#0.00");<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> * Create a new {@link com.codahale.metrics.Histogram} instance. These constructors are<a name="line.41"></a> |
| <span class="sourceLineNo">042</span> * not public in 2.2.0, so we use reflection to find them.<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> */<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> public static Histogram newHistogram(Reservoir sample) {<a name="line.44"></a> |
| <span class="sourceLineNo">045</span> try {<a name="line.45"></a> |
| <span class="sourceLineNo">046</span> Constructor<?> ctor =<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> Histogram.class.getDeclaredConstructor(Reservoir.class);<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> ctor.setAccessible(true);<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> return (Histogram) ctor.newInstance(sample);<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> } catch (Exception e) {<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> throw new RuntimeException(e);<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> }<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> }<a name="line.53"></a> |
| <span class="sourceLineNo">054</span><a name="line.54"></a> |
| <span class="sourceLineNo">055</span> /** @return an abbreviated summary of {@code hist}. */<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> public static String getShortHistogramReport(final Histogram hist) {<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> Snapshot sn = hist.getSnapshot();<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> return "mean=" + DOUBLE_FORMAT.format(sn.getMean()) +<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> ", min=" + DOUBLE_FORMAT.format(sn.getMin()) +<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> ", max=" + DOUBLE_FORMAT.format(sn.getMax()) +<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> ", stdDev=" + DOUBLE_FORMAT.format(sn.getStdDev()) +<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> ", 95th=" + DOUBLE_FORMAT.format(sn.get95thPercentile()) +<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> ", 99th=" + DOUBLE_FORMAT.format(sn.get99thPercentile());<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> }<a name="line.64"></a> |
| <span class="sourceLineNo">065</span><a name="line.65"></a> |
| <span class="sourceLineNo">066</span> /** @return a summary of {@code hist}. */<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> public static String getHistogramReport(final Histogram hist) {<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> Snapshot sn = hist.getSnapshot();<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> return "mean=" + DOUBLE_FORMAT.format(sn.getMean()) +<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> ", min=" + DOUBLE_FORMAT.format(sn.getMin()) +<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> ", max=" + DOUBLE_FORMAT.format(sn.getMax()) +<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> ", stdDev=" + DOUBLE_FORMAT.format(sn.getStdDev()) +<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> ", 50th=" + DOUBLE_FORMAT.format(sn.getMedian()) +<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> ", 75th=" + DOUBLE_FORMAT.format(sn.get75thPercentile()) +<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> ", 95th=" + DOUBLE_FORMAT.format(sn.get95thPercentile()) +<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> ", 99th=" + DOUBLE_FORMAT.format(sn.get99thPercentile()) +<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> ", 99.9th=" + DOUBLE_FORMAT.format(sn.get999thPercentile()) +<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> ", 99.99th=" + DOUBLE_FORMAT.format(sn.getValue(0.9999)) +<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> ", 99.999th=" + DOUBLE_FORMAT.format(sn.getValue(0.99999));<a name="line.79"></a> |
| <span class="sourceLineNo">080</span> }<a name="line.80"></a> |
| <span class="sourceLineNo">081</span><a name="line.81"></a> |
| <span class="sourceLineNo">082</span> /** @return pretty summary of {@code hist}. */<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> public static String getPrettyHistogramReport(final Histogram h) {<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> Snapshot sn = h.getSnapshot();<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> return<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> "Mean = " + DOUBLE_FORMAT.format(sn.getMean()) + "\n" +<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> "Min = " + DOUBLE_FORMAT.format(sn.getMin()) + "\n" +<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> "Max = " + DOUBLE_FORMAT.format(sn.getMax()) + "\n" +<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> "StdDev = " + DOUBLE_FORMAT.format(sn.getStdDev()) + "\n" +<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> "50th = " + DOUBLE_FORMAT.format(sn.getMedian()) + "\n" +<a name="line.90"></a> |
| <span class="sourceLineNo">091</span> "75th = " + DOUBLE_FORMAT.format(sn.get75thPercentile()) + "\n" +<a name="line.91"></a> |
| <span class="sourceLineNo">092</span> "95th = " + DOUBLE_FORMAT.format(sn.get95thPercentile()) + "\n" +<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> "99th = " + DOUBLE_FORMAT.format(sn.get99thPercentile()) + "\n" +<a name="line.93"></a> |
| <span class="sourceLineNo">094</span> "99.9th = " + DOUBLE_FORMAT.format(sn.get999thPercentile()) + "\n" +<a name="line.94"></a> |
| <span class="sourceLineNo">095</span> "99.99th = " + DOUBLE_FORMAT.format(sn.getValue(0.9999)) + "\n" +<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> "99.999th = " + DOUBLE_FORMAT.format(sn.getValue(0.99999));<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> |
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