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<pre><span class="source-line-no">001</span><span id="line-1">/*</span>
<span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span>
<span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span>
<span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span>
<span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span>
<span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span>
<span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span>
<span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span>
<span class="source-line-no">009</span><span id="line-9"> *</span>
<span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span>
<span class="source-line-no">011</span><span id="line-11"> *</span>
<span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span>
<span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span>
<span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span>
<span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span>
<span class="source-line-no">017</span><span id="line-17"> */</span>
<span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.util;</span>
<span class="source-line-no">019</span><span id="line-19"></span>
<span class="source-line-no">020</span><span id="line-20">import java.io.Closeable;</span>
<span class="source-line-no">021</span><span id="line-21">import java.io.IOException;</span>
<span class="source-line-no">022</span><span id="line-22">import java.io.OutputStreamWriter;</span>
<span class="source-line-no">023</span><span id="line-23">import java.io.PrintWriter;</span>
<span class="source-line-no">024</span><span id="line-24">import java.lang.management.ManagementFactory;</span>
<span class="source-line-no">025</span><span id="line-25">import java.lang.reflect.Array;</span>
<span class="source-line-no">026</span><span id="line-26">import java.nio.charset.StandardCharsets;</span>
<span class="source-line-no">027</span><span id="line-27">import java.util.Iterator;</span>
<span class="source-line-no">028</span><span id="line-28">import java.util.Set;</span>
<span class="source-line-no">029</span><span id="line-29">import java.util.regex.Pattern;</span>
<span class="source-line-no">030</span><span id="line-30">import javax.management.AttributeNotFoundException;</span>
<span class="source-line-no">031</span><span id="line-31">import javax.management.InstanceNotFoundException;</span>
<span class="source-line-no">032</span><span id="line-32">import javax.management.IntrospectionException;</span>
<span class="source-line-no">033</span><span id="line-33">import javax.management.MBeanAttributeInfo;</span>
<span class="source-line-no">034</span><span id="line-34">import javax.management.MBeanException;</span>
<span class="source-line-no">035</span><span id="line-35">import javax.management.MBeanInfo;</span>
<span class="source-line-no">036</span><span id="line-36">import javax.management.MBeanServer;</span>
<span class="source-line-no">037</span><span id="line-37">import javax.management.MalformedObjectNameException;</span>
<span class="source-line-no">038</span><span id="line-38">import javax.management.ObjectName;</span>
<span class="source-line-no">039</span><span id="line-39">import javax.management.ReflectionException;</span>
<span class="source-line-no">040</span><span id="line-40">import javax.management.RuntimeErrorException;</span>
<span class="source-line-no">041</span><span id="line-41">import javax.management.RuntimeMBeanException;</span>
<span class="source-line-no">042</span><span id="line-42">import javax.management.openmbean.CompositeData;</span>
<span class="source-line-no">043</span><span id="line-43">import javax.management.openmbean.CompositeType;</span>
<span class="source-line-no">044</span><span id="line-44">import javax.management.openmbean.TabularData;</span>
<span class="source-line-no">045</span><span id="line-45">import org.apache.yetus.audience.InterfaceAudience;</span>
<span class="source-line-no">046</span><span id="line-46">import org.slf4j.Logger;</span>
<span class="source-line-no">047</span><span id="line-47">import org.slf4j.LoggerFactory;</span>
<span class="source-line-no">048</span><span id="line-48"></span>
<span class="source-line-no">049</span><span id="line-49">import org.apache.hbase.thirdparty.com.google.gson.Gson;</span>
<span class="source-line-no">050</span><span id="line-50">import org.apache.hbase.thirdparty.com.google.gson.stream.JsonWriter;</span>
<span class="source-line-no">051</span><span id="line-51"></span>
<span class="source-line-no">052</span><span id="line-52">/**</span>
<span class="source-line-no">053</span><span id="line-53"> * Utility for doing JSON and MBeans.</span>
<span class="source-line-no">054</span><span id="line-54"> */</span>
<span class="source-line-no">055</span><span id="line-55">@InterfaceAudience.Private</span>
<span class="source-line-no">056</span><span id="line-56">public class JSONBean {</span>
<span class="source-line-no">057</span><span id="line-57"> private static final String COMMA = ",";</span>
<span class="source-line-no">058</span><span id="line-58"> private static final String ASTERICK = "*";</span>
<span class="source-line-no">059</span><span id="line-59"> private static final Logger LOG = LoggerFactory.getLogger(JSONBean.class);</span>
<span class="source-line-no">060</span><span id="line-60"> private static final Gson GSON = GsonUtil.createGsonWithDisableHtmlEscaping().create();</span>
<span class="source-line-no">061</span><span id="line-61"></span>
<span class="source-line-no">062</span><span id="line-62"> /**</span>
<span class="source-line-no">063</span><span id="line-63"> * Use dumping out mbeans as JSON.</span>
<span class="source-line-no">064</span><span id="line-64"> */</span>
<span class="source-line-no">065</span><span id="line-65"> public interface Writer extends Closeable {</span>
<span class="source-line-no">066</span><span id="line-66"></span>
<span class="source-line-no">067</span><span id="line-67"> void write(String key, String value) throws IOException;</span>
<span class="source-line-no">068</span><span id="line-68"></span>
<span class="source-line-no">069</span><span id="line-69"> default int write(MBeanServer mBeanServer, ObjectName qry, String attribute,</span>
<span class="source-line-no">070</span><span id="line-70"> boolean description) throws IOException {</span>
<span class="source-line-no">071</span><span id="line-71"> return write(mBeanServer, qry, attribute, description, null);</span>
<span class="source-line-no">072</span><span id="line-72"> }</span>
<span class="source-line-no">073</span><span id="line-73"></span>
<span class="source-line-no">074</span><span id="line-74"> int write(MBeanServer mBeanServer, ObjectName qry, String attribute, boolean description,</span>
<span class="source-line-no">075</span><span id="line-75"> ObjectName excluded) throws IOException;</span>
<span class="source-line-no">076</span><span id="line-76"></span>
<span class="source-line-no">077</span><span id="line-77"> void flush() throws IOException;</span>
<span class="source-line-no">078</span><span id="line-78"> }</span>
<span class="source-line-no">079</span><span id="line-79"></span>
<span class="source-line-no">080</span><span id="line-80"> /**</span>
<span class="source-line-no">081</span><span id="line-81"> * Notice that, closing the return {@link Writer} will not close the {@code writer} passed in, you</span>
<span class="source-line-no">082</span><span id="line-82"> * still need to close the {@code writer} by yourself.</span>
<span class="source-line-no">083</span><span id="line-83"> * &lt;p/&gt;</span>
<span class="source-line-no">084</span><span id="line-84"> * This is because that, we can only finish the json after you call {@link Writer#close()}. So if</span>
<span class="source-line-no">085</span><span id="line-85"> * we just close the {@code writer}, you can write nothing after finished the json.</span>
<span class="source-line-no">086</span><span id="line-86"> */</span>
<span class="source-line-no">087</span><span id="line-87"> public Writer open(final PrintWriter writer) throws IOException {</span>
<span class="source-line-no">088</span><span id="line-88"> JsonWriter jsonWriter = GSON.newJsonWriter(new java.io.Writer() {</span>
<span class="source-line-no">089</span><span id="line-89"></span>
<span class="source-line-no">090</span><span id="line-90"> @Override</span>
<span class="source-line-no">091</span><span id="line-91"> public void write(char[] cbuf, int off, int len) throws IOException {</span>
<span class="source-line-no">092</span><span id="line-92"> writer.write(cbuf, off, len);</span>
<span class="source-line-no">093</span><span id="line-93"> }</span>
<span class="source-line-no">094</span><span id="line-94"></span>
<span class="source-line-no">095</span><span id="line-95"> @Override</span>
<span class="source-line-no">096</span><span id="line-96"> public void flush() throws IOException {</span>
<span class="source-line-no">097</span><span id="line-97"> writer.flush();</span>
<span class="source-line-no">098</span><span id="line-98"> }</span>
<span class="source-line-no">099</span><span id="line-99"></span>
<span class="source-line-no">100</span><span id="line-100"> @Override</span>
<span class="source-line-no">101</span><span id="line-101"> public void close() throws IOException {</span>
<span class="source-line-no">102</span><span id="line-102"> // do nothing</span>
<span class="source-line-no">103</span><span id="line-103"> }</span>
<span class="source-line-no">104</span><span id="line-104"> });</span>
<span class="source-line-no">105</span><span id="line-105"> jsonWriter.setIndent(" ");</span>
<span class="source-line-no">106</span><span id="line-106"> jsonWriter.beginObject();</span>
<span class="source-line-no">107</span><span id="line-107"> return new Writer() {</span>
<span class="source-line-no">108</span><span id="line-108"> @Override</span>
<span class="source-line-no">109</span><span id="line-109"> public void flush() throws IOException {</span>
<span class="source-line-no">110</span><span id="line-110"> jsonWriter.flush();</span>
<span class="source-line-no">111</span><span id="line-111"> }</span>
<span class="source-line-no">112</span><span id="line-112"></span>
<span class="source-line-no">113</span><span id="line-113"> @Override</span>
<span class="source-line-no">114</span><span id="line-114"> public void close() throws IOException {</span>
<span class="source-line-no">115</span><span id="line-115"> jsonWriter.endObject();</span>
<span class="source-line-no">116</span><span id="line-116"> jsonWriter.close();</span>
<span class="source-line-no">117</span><span id="line-117"> }</span>
<span class="source-line-no">118</span><span id="line-118"></span>
<span class="source-line-no">119</span><span id="line-119"> @Override</span>
<span class="source-line-no">120</span><span id="line-120"> public void write(String key, String value) throws IOException {</span>
<span class="source-line-no">121</span><span id="line-121"> jsonWriter.name(key).value(value);</span>
<span class="source-line-no">122</span><span id="line-122"> }</span>
<span class="source-line-no">123</span><span id="line-123"></span>
<span class="source-line-no">124</span><span id="line-124"> @Override</span>
<span class="source-line-no">125</span><span id="line-125"> public int write(MBeanServer mBeanServer, ObjectName qry, String attribute,</span>
<span class="source-line-no">126</span><span id="line-126"> boolean description, ObjectName excluded) throws IOException {</span>
<span class="source-line-no">127</span><span id="line-127"> return JSONBean.write(jsonWriter, mBeanServer, qry, attribute, description, excluded);</span>
<span class="source-line-no">128</span><span id="line-128"> }</span>
<span class="source-line-no">129</span><span id="line-129"> };</span>
<span class="source-line-no">130</span><span id="line-130"> }</span>
<span class="source-line-no">131</span><span id="line-131"></span>
<span class="source-line-no">132</span><span id="line-132"> /** Returns Return non-zero if failed to find bean. 0 */</span>
<span class="source-line-no">133</span><span id="line-133"> private static int write(JsonWriter writer, MBeanServer mBeanServer, ObjectName qry,</span>
<span class="source-line-no">134</span><span id="line-134"> String attribute, boolean description, ObjectName excluded) throws IOException {</span>
<span class="source-line-no">135</span><span id="line-135"> LOG.debug("Listing beans for {}", qry);</span>
<span class="source-line-no">136</span><span id="line-136"> Set&lt;ObjectName&gt; names = mBeanServer.queryNames(qry, null);</span>
<span class="source-line-no">137</span><span id="line-137"> writer.name("beans").beginArray();</span>
<span class="source-line-no">138</span><span id="line-138"> Iterator&lt;ObjectName&gt; it = names.iterator();</span>
<span class="source-line-no">139</span><span id="line-139"> Pattern[] matchingPattern = null;</span>
<span class="source-line-no">140</span><span id="line-140"> while (it.hasNext()) {</span>
<span class="source-line-no">141</span><span id="line-141"> ObjectName oname = it.next();</span>
<span class="source-line-no">142</span><span id="line-142"> if (excluded != null &amp;&amp; excluded.apply(oname)) {</span>
<span class="source-line-no">143</span><span id="line-143"> continue;</span>
<span class="source-line-no">144</span><span id="line-144"> }</span>
<span class="source-line-no">145</span><span id="line-145"> MBeanInfo minfo;</span>
<span class="source-line-no">146</span><span id="line-146"> String code = "";</span>
<span class="source-line-no">147</span><span id="line-147"> String descriptionStr = null;</span>
<span class="source-line-no">148</span><span id="line-148"> Object attributeinfo = null;</span>
<span class="source-line-no">149</span><span id="line-149"> try {</span>
<span class="source-line-no">150</span><span id="line-150"> minfo = mBeanServer.getMBeanInfo(oname);</span>
<span class="source-line-no">151</span><span id="line-151"> code = minfo.getClassName();</span>
<span class="source-line-no">152</span><span id="line-152"> if (description) {</span>
<span class="source-line-no">153</span><span id="line-153"> descriptionStr = minfo.getDescription();</span>
<span class="source-line-no">154</span><span id="line-154"> }</span>
<span class="source-line-no">155</span><span id="line-155"> String prs = "";</span>
<span class="source-line-no">156</span><span id="line-156"> try {</span>
<span class="source-line-no">157</span><span id="line-157"> if ("org.apache.commons.modeler.BaseModelMBean".equals(code)) {</span>
<span class="source-line-no">158</span><span id="line-158"> prs = "modelerType";</span>
<span class="source-line-no">159</span><span id="line-159"> code = (String) mBeanServer.getAttribute(oname, prs);</span>
<span class="source-line-no">160</span><span id="line-160"> }</span>
<span class="source-line-no">161</span><span id="line-161"> if (attribute != null) {</span>
<span class="source-line-no">162</span><span id="line-162"> String[] patternAttr = null;</span>
<span class="source-line-no">163</span><span id="line-163"> if (attribute.contains(ASTERICK)) {</span>
<span class="source-line-no">164</span><span id="line-164"> if (attribute.contains(COMMA)) {</span>
<span class="source-line-no">165</span><span id="line-165"> patternAttr = attribute.split(COMMA);</span>
<span class="source-line-no">166</span><span id="line-166"> } else {</span>
<span class="source-line-no">167</span><span id="line-167"> patternAttr = new String[1];</span>
<span class="source-line-no">168</span><span id="line-168"> patternAttr[0] = attribute;</span>
<span class="source-line-no">169</span><span id="line-169"> }</span>
<span class="source-line-no">170</span><span id="line-170"> matchingPattern = new Pattern[patternAttr.length];</span>
<span class="source-line-no">171</span><span id="line-171"> for (int i = 0; i &lt; patternAttr.length; i++) {</span>
<span class="source-line-no">172</span><span id="line-172"> matchingPattern[i] = Pattern.compile(patternAttr[i]);</span>
<span class="source-line-no">173</span><span id="line-173"> }</span>
<span class="source-line-no">174</span><span id="line-174"> // nullify the attribute</span>
<span class="source-line-no">175</span><span id="line-175"> attribute = null;</span>
<span class="source-line-no">176</span><span id="line-176"> } else {</span>
<span class="source-line-no">177</span><span id="line-177"> prs = attribute;</span>
<span class="source-line-no">178</span><span id="line-178"> attributeinfo = mBeanServer.getAttribute(oname, prs);</span>
<span class="source-line-no">179</span><span id="line-179"> }</span>
<span class="source-line-no">180</span><span id="line-180"> }</span>
<span class="source-line-no">181</span><span id="line-181"> } catch (RuntimeMBeanException e) {</span>
<span class="source-line-no">182</span><span id="line-182"> // UnsupportedOperationExceptions happen in the normal course of business,</span>
<span class="source-line-no">183</span><span id="line-183"> // so no need to log them as errors all the time.</span>
<span class="source-line-no">184</span><span id="line-184"> if (e.getCause() instanceof UnsupportedOperationException) {</span>
<span class="source-line-no">185</span><span id="line-185"> if (LOG.isTraceEnabled()) {</span>
<span class="source-line-no">186</span><span id="line-186"> LOG.trace("Getting attribute " + prs + " of " + oname + " threw " + e);</span>
<span class="source-line-no">187</span><span id="line-187"> }</span>
<span class="source-line-no">188</span><span id="line-188"> } else {</span>
<span class="source-line-no">189</span><span id="line-189"> LOG.error("Getting attribute " + prs + " of " + oname + " threw an exception", e);</span>
<span class="source-line-no">190</span><span id="line-190"> }</span>
<span class="source-line-no">191</span><span id="line-191"> return 0;</span>
<span class="source-line-no">192</span><span id="line-192"> } catch (AttributeNotFoundException e) {</span>
<span class="source-line-no">193</span><span id="line-193"> // If the modelerType attribute was not found, the class name is used</span>
<span class="source-line-no">194</span><span id="line-194"> // instead.</span>
<span class="source-line-no">195</span><span id="line-195"> LOG.error("getting attribute " + prs + " of " + oname + " threw an exception", e);</span>
<span class="source-line-no">196</span><span id="line-196"> } catch (MBeanException e) {</span>
<span class="source-line-no">197</span><span id="line-197"> // The code inside the attribute getter threw an exception so log it,</span>
<span class="source-line-no">198</span><span id="line-198"> // and fall back on the class name</span>
<span class="source-line-no">199</span><span id="line-199"> LOG.error("getting attribute " + prs + " of " + oname + " threw an exception", e);</span>
<span class="source-line-no">200</span><span id="line-200"> } catch (RuntimeException e) {</span>
<span class="source-line-no">201</span><span id="line-201"> // For some reason even with an MBeanException available to them</span>
<span class="source-line-no">202</span><span id="line-202"> // Runtime exceptionscan still find their way through, so treat them</span>
<span class="source-line-no">203</span><span id="line-203"> // the same as MBeanException</span>
<span class="source-line-no">204</span><span id="line-204"> LOG.error("getting attribute " + prs + " of " + oname + " threw an exception", e);</span>
<span class="source-line-no">205</span><span id="line-205"> } catch (ReflectionException e) {</span>
<span class="source-line-no">206</span><span id="line-206"> // This happens when the code inside the JMX bean (setter?? from the</span>
<span class="source-line-no">207</span><span id="line-207"> // java docs) threw an exception, so log it and fall back on the</span>
<span class="source-line-no">208</span><span id="line-208"> // class name</span>
<span class="source-line-no">209</span><span id="line-209"> LOG.error("getting attribute " + prs + " of " + oname + " threw an exception", e);</span>
<span class="source-line-no">210</span><span id="line-210"> }</span>
<span class="source-line-no">211</span><span id="line-211"> } catch (InstanceNotFoundException e) {</span>
<span class="source-line-no">212</span><span id="line-212"> // Ignored for some reason the bean was not found so don't output it</span>
<span class="source-line-no">213</span><span id="line-213"> continue;</span>
<span class="source-line-no">214</span><span id="line-214"> } catch (IntrospectionException e) {</span>
<span class="source-line-no">215</span><span id="line-215"> // This is an internal error, something odd happened with reflection so</span>
<span class="source-line-no">216</span><span id="line-216"> // log it and don't output the bean.</span>
<span class="source-line-no">217</span><span id="line-217"> LOG.error("Problem while trying to process JMX query: " + qry + " with MBean " + oname, e);</span>
<span class="source-line-no">218</span><span id="line-218"> continue;</span>
<span class="source-line-no">219</span><span id="line-219"> } catch (ReflectionException e) {</span>
<span class="source-line-no">220</span><span id="line-220"> // This happens when the code inside the JMX bean threw an exception, so</span>
<span class="source-line-no">221</span><span id="line-221"> // log it and don't output the bean.</span>
<span class="source-line-no">222</span><span id="line-222"> LOG.error("Problem while trying to process JMX query: " + qry + " with MBean " + oname, e);</span>
<span class="source-line-no">223</span><span id="line-223"> continue;</span>
<span class="source-line-no">224</span><span id="line-224"> }</span>
<span class="source-line-no">225</span><span id="line-225"> writer.beginObject();</span>
<span class="source-line-no">226</span><span id="line-226"> writer.name("name").value(oname.toString());</span>
<span class="source-line-no">227</span><span id="line-227"> if (description &amp;&amp; descriptionStr != null &amp;&amp; descriptionStr.length() &gt; 0) {</span>
<span class="source-line-no">228</span><span id="line-228"> writer.name("description").value(descriptionStr);</span>
<span class="source-line-no">229</span><span id="line-229"> }</span>
<span class="source-line-no">230</span><span id="line-230"> writer.name("modelerType").value(code);</span>
<span class="source-line-no">231</span><span id="line-231"> if (attribute != null &amp;&amp; attributeinfo == null) {</span>
<span class="source-line-no">232</span><span id="line-232"> writer.name("result").value("ERROR");</span>
<span class="source-line-no">233</span><span id="line-233"> writer.name("message").value("No attribute with name " + attribute + " was found.");</span>
<span class="source-line-no">234</span><span id="line-234"> writer.endObject();</span>
<span class="source-line-no">235</span><span id="line-235"> writer.endArray();</span>
<span class="source-line-no">236</span><span id="line-236"> writer.close();</span>
<span class="source-line-no">237</span><span id="line-237"> return -1;</span>
<span class="source-line-no">238</span><span id="line-238"> }</span>
<span class="source-line-no">239</span><span id="line-239"></span>
<span class="source-line-no">240</span><span id="line-240"> if (attribute != null) {</span>
<span class="source-line-no">241</span><span id="line-241"> writeAttribute(writer, attribute, descriptionStr, attributeinfo);</span>
<span class="source-line-no">242</span><span id="line-242"> } else {</span>
<span class="source-line-no">243</span><span id="line-243"> MBeanAttributeInfo[] attrs = minfo.getAttributes();</span>
<span class="source-line-no">244</span><span id="line-244"> for (int i = 0; i &lt; attrs.length; i++) {</span>
<span class="source-line-no">245</span><span id="line-245"> writeAttribute(writer, mBeanServer, oname, description, matchingPattern, attrs[i]);</span>
<span class="source-line-no">246</span><span id="line-246"> }</span>
<span class="source-line-no">247</span><span id="line-247"> }</span>
<span class="source-line-no">248</span><span id="line-248"> writer.endObject();</span>
<span class="source-line-no">249</span><span id="line-249"> }</span>
<span class="source-line-no">250</span><span id="line-250"> writer.endArray();</span>
<span class="source-line-no">251</span><span id="line-251"> return 0;</span>
<span class="source-line-no">252</span><span id="line-252"> }</span>
<span class="source-line-no">253</span><span id="line-253"></span>
<span class="source-line-no">254</span><span id="line-254"> private static void writeAttribute(JsonWriter writer, MBeanServer mBeanServer, ObjectName oname,</span>
<span class="source-line-no">255</span><span id="line-255"> boolean description, Pattern pattern[], MBeanAttributeInfo attr) throws IOException {</span>
<span class="source-line-no">256</span><span id="line-256"> if (!attr.isReadable()) {</span>
<span class="source-line-no">257</span><span id="line-257"> return;</span>
<span class="source-line-no">258</span><span id="line-258"> }</span>
<span class="source-line-no">259</span><span id="line-259"> String attName = attr.getName();</span>
<span class="source-line-no">260</span><span id="line-260"> if ("modelerType".equals(attName)) {</span>
<span class="source-line-no">261</span><span id="line-261"> return;</span>
<span class="source-line-no">262</span><span id="line-262"> }</span>
<span class="source-line-no">263</span><span id="line-263"> if (attName.indexOf("=") &gt;= 0 || attName.indexOf(" ") &gt;= 0) {</span>
<span class="source-line-no">264</span><span id="line-264"> return;</span>
<span class="source-line-no">265</span><span id="line-265"> }</span>
<span class="source-line-no">266</span><span id="line-266"></span>
<span class="source-line-no">267</span><span id="line-267"> if (pattern != null) {</span>
<span class="source-line-no">268</span><span id="line-268"> boolean matchFound = false;</span>
<span class="source-line-no">269</span><span id="line-269"> for (Pattern compile : pattern) {</span>
<span class="source-line-no">270</span><span id="line-270"> // check if we have any match</span>
<span class="source-line-no">271</span><span id="line-271"> if (compile.matcher(attName).find()) {</span>
<span class="source-line-no">272</span><span id="line-272"> matchFound = true;</span>
<span class="source-line-no">273</span><span id="line-273"> break;</span>
<span class="source-line-no">274</span><span id="line-274"> }</span>
<span class="source-line-no">275</span><span id="line-275"> }</span>
<span class="source-line-no">276</span><span id="line-276"> if (!matchFound) {</span>
<span class="source-line-no">277</span><span id="line-277"> return;</span>
<span class="source-line-no">278</span><span id="line-278"> }</span>
<span class="source-line-no">279</span><span id="line-279"> }</span>
<span class="source-line-no">280</span><span id="line-280"></span>
<span class="source-line-no">281</span><span id="line-281"> String descriptionStr = description ? attr.getDescription() : null;</span>
<span class="source-line-no">282</span><span id="line-282"> Object value = null;</span>
<span class="source-line-no">283</span><span id="line-283"> try {</span>
<span class="source-line-no">284</span><span id="line-284"> value = mBeanServer.getAttribute(oname, attName);</span>
<span class="source-line-no">285</span><span id="line-285"> } catch (RuntimeMBeanException e) {</span>
<span class="source-line-no">286</span><span id="line-286"> // UnsupportedOperationExceptions happen in the normal course of business,</span>
<span class="source-line-no">287</span><span id="line-287"> // so no need to log them as errors all the time.</span>
<span class="source-line-no">288</span><span id="line-288"> if (e.getCause() instanceof UnsupportedOperationException) {</span>
<span class="source-line-no">289</span><span id="line-289"> if (LOG.isTraceEnabled()) {</span>
<span class="source-line-no">290</span><span id="line-290"> LOG.trace("Getting attribute " + attName + " of " + oname + " threw " + e);</span>
<span class="source-line-no">291</span><span id="line-291"> }</span>
<span class="source-line-no">292</span><span id="line-292"> } else {</span>
<span class="source-line-no">293</span><span id="line-293"> LOG.error("getting attribute " + attName + " of " + oname + " threw an exception", e);</span>
<span class="source-line-no">294</span><span id="line-294"> }</span>
<span class="source-line-no">295</span><span id="line-295"> return;</span>
<span class="source-line-no">296</span><span id="line-296"> } catch (RuntimeErrorException e) {</span>
<span class="source-line-no">297</span><span id="line-297"> // RuntimeErrorException happens when an unexpected failure occurs in getAttribute</span>
<span class="source-line-no">298</span><span id="line-298"> // for example https://issues.apache.org/jira/browse/DAEMON-120</span>
<span class="source-line-no">299</span><span id="line-299"> LOG.debug("getting attribute " + attName + " of " + oname + " threw an exception", e);</span>
<span class="source-line-no">300</span><span id="line-300"> return;</span>
<span class="source-line-no">301</span><span id="line-301"> } catch (AttributeNotFoundException e) {</span>
<span class="source-line-no">302</span><span id="line-302"> // Ignored the attribute was not found, which should never happen because the bean</span>
<span class="source-line-no">303</span><span id="line-303"> // just told us that it has this attribute, but if this happens just don't output</span>
<span class="source-line-no">304</span><span id="line-304"> // the attribute.</span>
<span class="source-line-no">305</span><span id="line-305"> return;</span>
<span class="source-line-no">306</span><span id="line-306"> } catch (MBeanException e) {</span>
<span class="source-line-no">307</span><span id="line-307"> // The code inside the attribute getter threw an exception so log it, and</span>
<span class="source-line-no">308</span><span id="line-308"> // skip outputting the attribute</span>
<span class="source-line-no">309</span><span id="line-309"> LOG.error("getting attribute " + attName + " of " + oname + " threw an exception", e);</span>
<span class="source-line-no">310</span><span id="line-310"> return;</span>
<span class="source-line-no">311</span><span id="line-311"> } catch (RuntimeException e) {</span>
<span class="source-line-no">312</span><span id="line-312"> // For some reason even with an MBeanException available to them Runtime exceptions</span>
<span class="source-line-no">313</span><span id="line-313"> // can still find their way through, so treat them the same as MBeanException</span>
<span class="source-line-no">314</span><span id="line-314"> LOG.error("getting attribute " + attName + " of " + oname + " threw an exception", e);</span>
<span class="source-line-no">315</span><span id="line-315"> return;</span>
<span class="source-line-no">316</span><span id="line-316"> } catch (ReflectionException e) {</span>
<span class="source-line-no">317</span><span id="line-317"> // This happens when the code inside the JMX bean (setter?? from the java docs)</span>
<span class="source-line-no">318</span><span id="line-318"> // threw an exception, so log it and skip outputting the attribute</span>
<span class="source-line-no">319</span><span id="line-319"> LOG.error("getting attribute " + attName + " of " + oname + " threw an exception", e);</span>
<span class="source-line-no">320</span><span id="line-320"> return;</span>
<span class="source-line-no">321</span><span id="line-321"> } catch (InstanceNotFoundException e) {</span>
<span class="source-line-no">322</span><span id="line-322"> // Ignored the mbean itself was not found, which should never happen because we</span>
<span class="source-line-no">323</span><span id="line-323"> // just accessed it (perhaps something unregistered in-between) but if this</span>
<span class="source-line-no">324</span><span id="line-324"> // happens just don't output the attribute.</span>
<span class="source-line-no">325</span><span id="line-325"> return;</span>
<span class="source-line-no">326</span><span id="line-326"> }</span>
<span class="source-line-no">327</span><span id="line-327"></span>
<span class="source-line-no">328</span><span id="line-328"> writeAttribute(writer, attName, descriptionStr, value);</span>
<span class="source-line-no">329</span><span id="line-329"> }</span>
<span class="source-line-no">330</span><span id="line-330"></span>
<span class="source-line-no">331</span><span id="line-331"> private static void writeAttribute(JsonWriter writer, String attName, String descriptionStr,</span>
<span class="source-line-no">332</span><span id="line-332"> Object value) throws IOException {</span>
<span class="source-line-no">333</span><span id="line-333"> if (descriptionStr != null &amp;&amp; descriptionStr.length() &gt; 0 &amp;&amp; !attName.equals(descriptionStr)) {</span>
<span class="source-line-no">334</span><span id="line-334"> writer.name(attName);</span>
<span class="source-line-no">335</span><span id="line-335"> writer.beginObject();</span>
<span class="source-line-no">336</span><span id="line-336"> writer.name("description").value(descriptionStr);</span>
<span class="source-line-no">337</span><span id="line-337"> writer.name("value");</span>
<span class="source-line-no">338</span><span id="line-338"> writeObject(writer, value);</span>
<span class="source-line-no">339</span><span id="line-339"> writer.endObject();</span>
<span class="source-line-no">340</span><span id="line-340"> } else {</span>
<span class="source-line-no">341</span><span id="line-341"> writer.name(attName);</span>
<span class="source-line-no">342</span><span id="line-342"> writeObject(writer, value);</span>
<span class="source-line-no">343</span><span id="line-343"> }</span>
<span class="source-line-no">344</span><span id="line-344"> }</span>
<span class="source-line-no">345</span><span id="line-345"></span>
<span class="source-line-no">346</span><span id="line-346"> private static void writeObject(JsonWriter writer, Object value) throws IOException {</span>
<span class="source-line-no">347</span><span id="line-347"> if (value == null) {</span>
<span class="source-line-no">348</span><span id="line-348"> writer.nullValue();</span>
<span class="source-line-no">349</span><span id="line-349"> } else {</span>
<span class="source-line-no">350</span><span id="line-350"> Class&lt;?&gt; c = value.getClass();</span>
<span class="source-line-no">351</span><span id="line-351"> if (c.isArray()) {</span>
<span class="source-line-no">352</span><span id="line-352"> writer.beginArray();</span>
<span class="source-line-no">353</span><span id="line-353"> int len = Array.getLength(value);</span>
<span class="source-line-no">354</span><span id="line-354"> for (int j = 0; j &lt; len; j++) {</span>
<span class="source-line-no">355</span><span id="line-355"> Object item = Array.get(value, j);</span>
<span class="source-line-no">356</span><span id="line-356"> writeObject(writer, item);</span>
<span class="source-line-no">357</span><span id="line-357"> }</span>
<span class="source-line-no">358</span><span id="line-358"> writer.endArray();</span>
<span class="source-line-no">359</span><span id="line-359"> } else if (value instanceof Number) {</span>
<span class="source-line-no">360</span><span id="line-360"> Number n = (Number) value;</span>
<span class="source-line-no">361</span><span id="line-361"> if (Double.isFinite(n.doubleValue())) {</span>
<span class="source-line-no">362</span><span id="line-362"> writer.value(n);</span>
<span class="source-line-no">363</span><span id="line-363"> } else {</span>
<span class="source-line-no">364</span><span id="line-364"> writer.value(n.toString());</span>
<span class="source-line-no">365</span><span id="line-365"> }</span>
<span class="source-line-no">366</span><span id="line-366"> } else if (value instanceof Boolean) {</span>
<span class="source-line-no">367</span><span id="line-367"> Boolean b = (Boolean) value;</span>
<span class="source-line-no">368</span><span id="line-368"> writer.value(b);</span>
<span class="source-line-no">369</span><span id="line-369"> } else if (value instanceof CompositeData) {</span>
<span class="source-line-no">370</span><span id="line-370"> CompositeData cds = (CompositeData) value;</span>
<span class="source-line-no">371</span><span id="line-371"> CompositeType comp = cds.getCompositeType();</span>
<span class="source-line-no">372</span><span id="line-372"> Set&lt;String&gt; keys = comp.keySet();</span>
<span class="source-line-no">373</span><span id="line-373"> writer.beginObject();</span>
<span class="source-line-no">374</span><span id="line-374"> for (String key : keys) {</span>
<span class="source-line-no">375</span><span id="line-375"> writeAttribute(writer, key, null, cds.get(key));</span>
<span class="source-line-no">376</span><span id="line-376"> }</span>
<span class="source-line-no">377</span><span id="line-377"> writer.endObject();</span>
<span class="source-line-no">378</span><span id="line-378"> } else if (value instanceof TabularData) {</span>
<span class="source-line-no">379</span><span id="line-379"> TabularData tds = (TabularData) value;</span>
<span class="source-line-no">380</span><span id="line-380"> writer.beginArray();</span>
<span class="source-line-no">381</span><span id="line-381"> for (Object entry : tds.values()) {</span>
<span class="source-line-no">382</span><span id="line-382"> writeObject(writer, entry);</span>
<span class="source-line-no">383</span><span id="line-383"> }</span>
<span class="source-line-no">384</span><span id="line-384"> writer.endArray();</span>
<span class="source-line-no">385</span><span id="line-385"> } else {</span>
<span class="source-line-no">386</span><span id="line-386"> writer.value(value.toString());</span>
<span class="source-line-no">387</span><span id="line-387"> }</span>
<span class="source-line-no">388</span><span id="line-388"> }</span>
<span class="source-line-no">389</span><span id="line-389"> }</span>
<span class="source-line-no">390</span><span id="line-390"></span>
<span class="source-line-no">391</span><span id="line-391"> /**</span>
<span class="source-line-no">392</span><span id="line-392"> * Dump out all registered mbeans as json on System.out.</span>
<span class="source-line-no">393</span><span id="line-393"> */</span>
<span class="source-line-no">394</span><span id="line-394"> public static void dumpAllBeans() throws IOException, MalformedObjectNameException {</span>
<span class="source-line-no">395</span><span id="line-395"> try (PrintWriter writer =</span>
<span class="source-line-no">396</span><span id="line-396"> new PrintWriter(new OutputStreamWriter(System.out, StandardCharsets.UTF_8))) {</span>
<span class="source-line-no">397</span><span id="line-397"> JSONBean dumper = new JSONBean();</span>
<span class="source-line-no">398</span><span id="line-398"> try (JSONBean.Writer jsonBeanWriter = dumper.open(writer)) {</span>
<span class="source-line-no">399</span><span id="line-399"> MBeanServer mbeanServer = ManagementFactory.getPlatformMBeanServer();</span>
<span class="source-line-no">400</span><span id="line-400"> jsonBeanWriter.write(mbeanServer, new ObjectName("*:*"), null, false);</span>
<span class="source-line-no">401</span><span id="line-401"> }</span>
<span class="source-line-no">402</span><span id="line-402"> }</span>
<span class="source-line-no">403</span><span id="line-403"> }</span>
<span class="source-line-no">404</span><span id="line-404">}</span>
</pre>
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