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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.hadoop.hbase.regionserver;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.io.IOException;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.io.PrintWriter;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.io.StringWriter;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.lang.management.ManagementFactory;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import javax.management.MBeanServer;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import javax.management.MalformedObjectNameException;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import javax.management.ObjectName;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.util.JSONBean;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.27"></a>
<span class="sourceLineNo">028</span><a name="line.28"></a>
<span class="sourceLineNo">029</span>/**<a name="line.29"></a>
<span class="sourceLineNo">030</span> * Utility for doing JSON and MBeans.<a name="line.30"></a>
<span class="sourceLineNo">031</span> */<a name="line.31"></a>
<span class="sourceLineNo">032</span>@InterfaceAudience.Private<a name="line.32"></a>
<span class="sourceLineNo">033</span>public final class DumpRegionServerMetrics {<a name="line.33"></a>
<span class="sourceLineNo">034</span> /**<a name="line.34"></a>
<span class="sourceLineNo">035</span> * Dump out a subset of regionserver mbeans only, not all of them, as json on System.out.<a name="line.35"></a>
<span class="sourceLineNo">036</span> */<a name="line.36"></a>
<span class="sourceLineNo">037</span> public static String dumpMetrics() throws MalformedObjectNameException, IOException {<a name="line.37"></a>
<span class="sourceLineNo">038</span> StringWriter sw = new StringWriter(1024 * 100); // Guess this size<a name="line.38"></a>
<span class="sourceLineNo">039</span> try (PrintWriter writer = new PrintWriter(sw)) {<a name="line.39"></a>
<span class="sourceLineNo">040</span> JSONBean dumper = new JSONBean();<a name="line.40"></a>
<span class="sourceLineNo">041</span> try (JSONBean.Writer jsonBeanWriter = dumper.open(writer)) {<a name="line.41"></a>
<span class="sourceLineNo">042</span> MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();<a name="line.42"></a>
<span class="sourceLineNo">043</span> jsonBeanWriter.write(mbeanServer,<a name="line.43"></a>
<span class="sourceLineNo">044</span> new ObjectName("java.lang:type=Memory"), null, false);<a name="line.44"></a>
<span class="sourceLineNo">045</span> jsonBeanWriter.write(mbeanServer,<a name="line.45"></a>
<span class="sourceLineNo">046</span> new ObjectName("Hadoop:service=HBase,name=RegionServer,sub=IPC"), null, false);<a name="line.46"></a>
<span class="sourceLineNo">047</span> jsonBeanWriter.write(mbeanServer,<a name="line.47"></a>
<span class="sourceLineNo">048</span> new ObjectName("Hadoop:service=HBase,name=RegionServer,sub=Replication"), null, false);<a name="line.48"></a>
<span class="sourceLineNo">049</span> jsonBeanWriter.write(mbeanServer,<a name="line.49"></a>
<span class="sourceLineNo">050</span> new ObjectName("Hadoop:service=HBase,name=RegionServer,sub=Server"), null, false);<a name="line.50"></a>
<span class="sourceLineNo">051</span> }<a name="line.51"></a>
<span class="sourceLineNo">052</span> }<a name="line.52"></a>
<span class="sourceLineNo">053</span> sw.close();<a name="line.53"></a>
<span class="sourceLineNo">054</span> return sw.toString();<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> public static void main(String[] args) throws IOException, MalformedObjectNameException {<a name="line.57"></a>
<span class="sourceLineNo">058</span> String str = dumpMetrics();<a name="line.58"></a>
<span class="sourceLineNo">059</span> System.out.println(str);<a name="line.59"></a>
<span class="sourceLineNo">060</span> }<a name="line.60"></a>
<span class="sourceLineNo">061</span><a name="line.61"></a>
<span class="sourceLineNo">062</span> private DumpRegionServerMetrics() {}<a name="line.62"></a>
<span class="sourceLineNo">063</span>}<a name="line.63"></a>
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