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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<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.metrics2.lib;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import com.google.errorprone.annotations.RestrictedApi;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.util.Collection;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.concurrent.ConcurrentMap;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.metrics.Interns;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import org.apache.hadoop.metrics2.MetricsException;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.apache.hadoop.metrics2.MetricsInfo;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.apache.hadoop.metrics2.MetricsRecordBuilder;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.hadoop.metrics2.MetricsTag;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.hadoop.metrics2.impl.MsInfo;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.hbase.thirdparty.com.google.common.base.MoreObjects;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.hbase.thirdparty.com.google.common.collect.Maps;<a name="line.32"></a>
<span class="sourceLineNo">033</span><a name="line.33"></a>
<span class="sourceLineNo">034</span>/**<a name="line.34"></a>
<span class="sourceLineNo">035</span> * An optional metrics registry class for creating and maintaining a collection of MetricsMutables,<a name="line.35"></a>
<span class="sourceLineNo">036</span> * making writing metrics source easier. NOTE: this is a copy of<a name="line.36"></a>
<span class="sourceLineNo">037</span> * org.apache.hadoop.metrics2.lib.MetricsRegistry with added one feature: metrics can be removed.<a name="line.37"></a>
<span class="sourceLineNo">038</span> * When HADOOP-8313 is fixed, usages of this class should be substituted with<a name="line.38"></a>
<span class="sourceLineNo">039</span> * org.apache.hadoop.metrics2.lib.MetricsRegistry. This implementation also provides handy methods<a name="line.39"></a>
<span class="sourceLineNo">040</span> * for creating metrics dynamically. Another difference is that metricsMap implementation is<a name="line.40"></a>
<span class="sourceLineNo">041</span> * substituted with thread-safe map, as we allow dynamic metrics additions/removals.<a name="line.41"></a>
<span class="sourceLineNo">042</span> */<a name="line.42"></a>
<span class="sourceLineNo">043</span>@InterfaceAudience.Private<a name="line.43"></a>
<span class="sourceLineNo">044</span>public class DynamicMetricsRegistry {<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span> private final ConcurrentMap&lt;String, MutableMetric&gt; metricsMap = Maps.newConcurrentMap();<a name="line.46"></a>
<span class="sourceLineNo">047</span> private final ConcurrentMap&lt;String, MetricsTag&gt; tagsMap = Maps.newConcurrentMap();<a name="line.47"></a>
<span class="sourceLineNo">048</span> private final MetricsInfo metricsInfo;<a name="line.48"></a>
<span class="sourceLineNo">049</span> private final DefaultMetricsSystemHelper helper = new DefaultMetricsSystemHelper();<a name="line.49"></a>
<span class="sourceLineNo">050</span> private final static String[] histogramSuffixes = new String[] { "_num_ops", "_min", "_max",<a name="line.50"></a>
<span class="sourceLineNo">051</span> "_median", "_75th_percentile", "_90th_percentile", "_95th_percentile", "_99th_percentile" };<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> * Construct the registry with a record name<a name="line.54"></a>
<span class="sourceLineNo">055</span> * @param name of the record of the metrics<a name="line.55"></a>
<span class="sourceLineNo">056</span> */<a name="line.56"></a>
<span class="sourceLineNo">057</span> public DynamicMetricsRegistry(String name) {<a name="line.57"></a>
<span class="sourceLineNo">058</span> this(Interns.info(name, name));<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> /**<a name="line.61"></a>
<span class="sourceLineNo">062</span> * Construct the registry with a metadata object<a name="line.62"></a>
<span class="sourceLineNo">063</span> * @param info the info object for the metrics record/group<a name="line.63"></a>
<span class="sourceLineNo">064</span> */<a name="line.64"></a>
<span class="sourceLineNo">065</span> public DynamicMetricsRegistry(MetricsInfo info) {<a name="line.65"></a>
<span class="sourceLineNo">066</span> metricsInfo = info;<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> /** Returns the info object of the metrics registry */<a name="line.69"></a>
<span class="sourceLineNo">070</span> public MetricsInfo info() {<a name="line.70"></a>
<span class="sourceLineNo">071</span> return metricsInfo;<a name="line.71"></a>
<span class="sourceLineNo">072</span> }<a name="line.72"></a>
<span class="sourceLineNo">073</span><a name="line.73"></a>
<span class="sourceLineNo">074</span> /**<a name="line.74"></a>
<span class="sourceLineNo">075</span> * Get a metric by name<a name="line.75"></a>
<span class="sourceLineNo">076</span> * @param name of the metric<a name="line.76"></a>
<span class="sourceLineNo">077</span> * @return the metric object<a name="line.77"></a>
<span class="sourceLineNo">078</span> */<a name="line.78"></a>
<span class="sourceLineNo">079</span> public MutableMetric get(String name) {<a name="line.79"></a>
<span class="sourceLineNo">080</span> return metricsMap.get(name);<a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span> /**<a name="line.83"></a>
<span class="sourceLineNo">084</span> * Get a tag by name<a name="line.84"></a>
<span class="sourceLineNo">085</span> * @param name of the tag<a name="line.85"></a>
<span class="sourceLineNo">086</span> * @return the tag object<a name="line.86"></a>
<span class="sourceLineNo">087</span> */<a name="line.87"></a>
<span class="sourceLineNo">088</span> public MetricsTag getTag(String name) {<a name="line.88"></a>
<span class="sourceLineNo">089</span> return tagsMap.get(name);<a name="line.89"></a>
<span class="sourceLineNo">090</span> }<a name="line.90"></a>
<span class="sourceLineNo">091</span><a name="line.91"></a>
<span class="sourceLineNo">092</span> /**<a name="line.92"></a>
<span class="sourceLineNo">093</span> * Create a mutable long integer counter<a name="line.93"></a>
<span class="sourceLineNo">094</span> * @param name of the metric<a name="line.94"></a>
<span class="sourceLineNo">095</span> * @param desc metric description<a name="line.95"></a>
<span class="sourceLineNo">096</span> * @param iVal initial value<a name="line.96"></a>
<span class="sourceLineNo">097</span> * @return a new counter object<a name="line.97"></a>
<span class="sourceLineNo">098</span> */<a name="line.98"></a>
<span class="sourceLineNo">099</span> public MutableFastCounter newCounter(String name, String desc, long iVal) {<a name="line.99"></a>
<span class="sourceLineNo">100</span> return newCounter(new MetricsInfoImpl(name, desc), iVal);<a name="line.100"></a>
<span class="sourceLineNo">101</span> }<a name="line.101"></a>
<span class="sourceLineNo">102</span><a name="line.102"></a>
<span class="sourceLineNo">103</span> /**<a name="line.103"></a>
<span class="sourceLineNo">104</span> * Create a mutable long integer counter<a name="line.104"></a>
<span class="sourceLineNo">105</span> * @param info metadata of the metric<a name="line.105"></a>
<span class="sourceLineNo">106</span> * @param iVal initial value<a name="line.106"></a>
<span class="sourceLineNo">107</span> * @return a new counter object<a name="line.107"></a>
<span class="sourceLineNo">108</span> */<a name="line.108"></a>
<span class="sourceLineNo">109</span> public MutableFastCounter newCounter(MetricsInfo info, long iVal) {<a name="line.109"></a>
<span class="sourceLineNo">110</span> MutableFastCounter ret = new MutableFastCounter(info, iVal);<a name="line.110"></a>
<span class="sourceLineNo">111</span> return addNewMetricIfAbsent(info.name(), ret, MutableFastCounter.class);<a name="line.111"></a>
<span class="sourceLineNo">112</span> }<a name="line.112"></a>
<span class="sourceLineNo">113</span><a name="line.113"></a>
<span class="sourceLineNo">114</span> /**<a name="line.114"></a>
<span class="sourceLineNo">115</span> * Create a mutable long integer gauge<a name="line.115"></a>
<span class="sourceLineNo">116</span> * @param name of the metric<a name="line.116"></a>
<span class="sourceLineNo">117</span> * @param desc metric description<a name="line.117"></a>
<span class="sourceLineNo">118</span> * @param iVal initial value<a name="line.118"></a>
<span class="sourceLineNo">119</span> * @return a new gauge object<a name="line.119"></a>
<span class="sourceLineNo">120</span> */<a name="line.120"></a>
<span class="sourceLineNo">121</span> public MutableGaugeLong newGauge(String name, String desc, long iVal) {<a name="line.121"></a>
<span class="sourceLineNo">122</span> return newGauge(new MetricsInfoImpl(name, desc), iVal);<a name="line.122"></a>
<span class="sourceLineNo">123</span> }<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> * Create a mutable long integer gauge<a name="line.126"></a>
<span class="sourceLineNo">127</span> * @param info metadata of the metric<a name="line.127"></a>
<span class="sourceLineNo">128</span> * @param iVal initial value<a name="line.128"></a>
<span class="sourceLineNo">129</span> * @return a new gauge object<a name="line.129"></a>
<span class="sourceLineNo">130</span> */<a name="line.130"></a>
<span class="sourceLineNo">131</span> public MutableGaugeLong newGauge(MetricsInfo info, long iVal) {<a name="line.131"></a>
<span class="sourceLineNo">132</span> MutableGaugeLong ret = new MutableGaugeLong(info, iVal);<a name="line.132"></a>
<span class="sourceLineNo">133</span> return addNewMetricIfAbsent(info.name(), ret, MutableGaugeLong.class);<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> * Create a mutable metric with stats<a name="line.137"></a>
<span class="sourceLineNo">138</span> * @param name of the metric<a name="line.138"></a>
<span class="sourceLineNo">139</span> * @param desc metric description<a name="line.139"></a>
<span class="sourceLineNo">140</span> * @param sampleName of the metric (e.g., "Ops")<a name="line.140"></a>
<span class="sourceLineNo">141</span> * @param valueName of the metric (e.g., "Time" or "Latency")<a name="line.141"></a>
<span class="sourceLineNo">142</span> * @param extended produce extended stat (stdev, min/max etc.) if true.<a name="line.142"></a>
<span class="sourceLineNo">143</span> * @return a new mutable stat metric object<a name="line.143"></a>
<span class="sourceLineNo">144</span> */<a name="line.144"></a>
<span class="sourceLineNo">145</span> public MutableStat newStat(String name, String desc, String sampleName, String valueName,<a name="line.145"></a>
<span class="sourceLineNo">146</span> boolean extended) {<a name="line.146"></a>
<span class="sourceLineNo">147</span> MutableStat ret = new MutableStat(name, desc, sampleName, valueName, extended);<a name="line.147"></a>
<span class="sourceLineNo">148</span> return addNewMetricIfAbsent(name, ret, MutableStat.class);<a name="line.148"></a>
<span class="sourceLineNo">149</span> }<a name="line.149"></a>
<span class="sourceLineNo">150</span><a name="line.150"></a>
<span class="sourceLineNo">151</span> /**<a name="line.151"></a>
<span class="sourceLineNo">152</span> * Create a mutable metric with stats<a name="line.152"></a>
<span class="sourceLineNo">153</span> * @param name of the metric<a name="line.153"></a>
<span class="sourceLineNo">154</span> * @param desc metric description<a name="line.154"></a>
<span class="sourceLineNo">155</span> * @param sampleName of the metric (e.g., "Ops")<a name="line.155"></a>
<span class="sourceLineNo">156</span> * @param valueName of the metric (e.g., "Time" or "Latency")<a name="line.156"></a>
<span class="sourceLineNo">157</span> * @return a new mutable metric object<a name="line.157"></a>
<span class="sourceLineNo">158</span> */<a name="line.158"></a>
<span class="sourceLineNo">159</span> public MutableStat newStat(String name, String desc, String sampleName, String valueName) {<a name="line.159"></a>
<span class="sourceLineNo">160</span> return newStat(name, desc, sampleName, valueName, false);<a name="line.160"></a>
<span class="sourceLineNo">161</span> }<a name="line.161"></a>
<span class="sourceLineNo">162</span><a name="line.162"></a>
<span class="sourceLineNo">163</span> /**<a name="line.163"></a>
<span class="sourceLineNo">164</span> * Create a mutable rate metric<a name="line.164"></a>
<span class="sourceLineNo">165</span> * @param name of the metric<a name="line.165"></a>
<span class="sourceLineNo">166</span> * @return a new mutable metric object<a name="line.166"></a>
<span class="sourceLineNo">167</span> */<a name="line.167"></a>
<span class="sourceLineNo">168</span> public MutableRate newRate(String name) {<a name="line.168"></a>
<span class="sourceLineNo">169</span> return newRate(name, name, false);<a name="line.169"></a>
<span class="sourceLineNo">170</span> }<a name="line.170"></a>
<span class="sourceLineNo">171</span><a name="line.171"></a>
<span class="sourceLineNo">172</span> /**<a name="line.172"></a>
<span class="sourceLineNo">173</span> * Create a mutable rate metric<a name="line.173"></a>
<span class="sourceLineNo">174</span> * @param name of the metric<a name="line.174"></a>
<span class="sourceLineNo">175</span> * @param description of the metric<a name="line.175"></a>
<span class="sourceLineNo">176</span> * @return a new mutable rate metric object<a name="line.176"></a>
<span class="sourceLineNo">177</span> */<a name="line.177"></a>
<span class="sourceLineNo">178</span> public MutableRate newRate(String name, String description) {<a name="line.178"></a>
<span class="sourceLineNo">179</span> return newRate(name, description, false);<a name="line.179"></a>
<span class="sourceLineNo">180</span> }<a name="line.180"></a>
<span class="sourceLineNo">181</span><a name="line.181"></a>
<span class="sourceLineNo">182</span> /**<a name="line.182"></a>
<span class="sourceLineNo">183</span> * Create a mutable rate metric (for throughput measurement)<a name="line.183"></a>
<span class="sourceLineNo">184</span> * @param name of the metric<a name="line.184"></a>
<span class="sourceLineNo">185</span> * @param desc description<a name="line.185"></a>
<span class="sourceLineNo">186</span> * @param extended produce extended stat (stdev/min/max etc.) if true<a name="line.186"></a>
<span class="sourceLineNo">187</span> * @return a new mutable rate metric object<a name="line.187"></a>
<span class="sourceLineNo">188</span> */<a name="line.188"></a>
<span class="sourceLineNo">189</span> public MutableRate newRate(String name, String desc, boolean extended) {<a name="line.189"></a>
<span class="sourceLineNo">190</span> return newRate(name, desc, extended, true);<a name="line.190"></a>
<span class="sourceLineNo">191</span> }<a name="line.191"></a>
<span class="sourceLineNo">192</span><a name="line.192"></a>
<span class="sourceLineNo">193</span> @InterfaceAudience.Private<a name="line.193"></a>
<span class="sourceLineNo">194</span> public MutableRate newRate(String name, String desc, boolean extended, boolean returnExisting) {<a name="line.194"></a>
<span class="sourceLineNo">195</span> if (returnExisting) {<a name="line.195"></a>
<span class="sourceLineNo">196</span> MutableMetric rate = metricsMap.get(name);<a name="line.196"></a>
<span class="sourceLineNo">197</span> if (rate != null) {<a name="line.197"></a>
<span class="sourceLineNo">198</span> if (rate instanceof MutableRate) {<a name="line.198"></a>
<span class="sourceLineNo">199</span> return (MutableRate) rate;<a name="line.199"></a>
<span class="sourceLineNo">200</span> }<a name="line.200"></a>
<span class="sourceLineNo">201</span><a name="line.201"></a>
<span class="sourceLineNo">202</span> throw new MetricsException("Unexpected metrics type " + rate.getClass() + " for " + name);<a name="line.202"></a>
<span class="sourceLineNo">203</span> }<a name="line.203"></a>
<span class="sourceLineNo">204</span> }<a name="line.204"></a>
<span class="sourceLineNo">205</span> MutableRate ret = new MutableRate(name, desc, extended);<a name="line.205"></a>
<span class="sourceLineNo">206</span> return addNewMetricIfAbsent(name, ret, MutableRate.class);<a name="line.206"></a>
<span class="sourceLineNo">207</span> }<a name="line.207"></a>
<span class="sourceLineNo">208</span><a name="line.208"></a>
<span class="sourceLineNo">209</span> /**<a name="line.209"></a>
<span class="sourceLineNo">210</span> * Create a new histogram.<a name="line.210"></a>
<span class="sourceLineNo">211</span> * @param name Name of the histogram.<a name="line.211"></a>
<span class="sourceLineNo">212</span> * @return A new MutableHistogram<a name="line.212"></a>
<span class="sourceLineNo">213</span> */<a name="line.213"></a>
<span class="sourceLineNo">214</span> public MutableHistogram newHistogram(String name) {<a name="line.214"></a>
<span class="sourceLineNo">215</span> return newHistogram(name, "");<a name="line.215"></a>
<span class="sourceLineNo">216</span> }<a name="line.216"></a>
<span class="sourceLineNo">217</span><a name="line.217"></a>
<span class="sourceLineNo">218</span> /**<a name="line.218"></a>
<span class="sourceLineNo">219</span> * Create a new histogram.<a name="line.219"></a>
<span class="sourceLineNo">220</span> * @param name The name of the histogram<a name="line.220"></a>
<span class="sourceLineNo">221</span> * @param desc The description of the data in the histogram.<a name="line.221"></a>
<span class="sourceLineNo">222</span> * @return A new MutableHistogram<a name="line.222"></a>
<span class="sourceLineNo">223</span> */<a name="line.223"></a>
<span class="sourceLineNo">224</span> public MutableHistogram newHistogram(String name, String desc) {<a name="line.224"></a>
<span class="sourceLineNo">225</span> MutableHistogram histo = new MutableHistogram(name, desc);<a name="line.225"></a>
<span class="sourceLineNo">226</span> return addNewMetricIfAbsent(name, histo, MutableHistogram.class);<a name="line.226"></a>
<span class="sourceLineNo">227</span> }<a name="line.227"></a>
<span class="sourceLineNo">228</span><a name="line.228"></a>
<span class="sourceLineNo">229</span> /**<a name="line.229"></a>
<span class="sourceLineNo">230</span> * Create a new histogram with time range counts.<a name="line.230"></a>
<span class="sourceLineNo">231</span> * @param name Name of the histogram.<a name="line.231"></a>
<span class="sourceLineNo">232</span> * @return A new MutableTimeHistogram<a name="line.232"></a>
<span class="sourceLineNo">233</span> */<a name="line.233"></a>
<span class="sourceLineNo">234</span> public MutableTimeHistogram newTimeHistogram(String name) {<a name="line.234"></a>
<span class="sourceLineNo">235</span> return newTimeHistogram(name, "");<a name="line.235"></a>
<span class="sourceLineNo">236</span> }<a name="line.236"></a>
<span class="sourceLineNo">237</span><a name="line.237"></a>
<span class="sourceLineNo">238</span> /**<a name="line.238"></a>
<span class="sourceLineNo">239</span> * Create a new histogram with time range counts.<a name="line.239"></a>
<span class="sourceLineNo">240</span> * @param name The name of the histogram<a name="line.240"></a>
<span class="sourceLineNo">241</span> * @param desc The description of the data in the histogram.<a name="line.241"></a>
<span class="sourceLineNo">242</span> * @return A new MutableTimeHistogram<a name="line.242"></a>
<span class="sourceLineNo">243</span> */<a name="line.243"></a>
<span class="sourceLineNo">244</span> public MutableTimeHistogram newTimeHistogram(String name, String desc) {<a name="line.244"></a>
<span class="sourceLineNo">245</span> MutableTimeHistogram histo = new MutableTimeHistogram(name, desc);<a name="line.245"></a>
<span class="sourceLineNo">246</span> return addNewMetricIfAbsent(name, histo, MutableTimeHistogram.class);<a name="line.246"></a>
<span class="sourceLineNo">247</span> }<a name="line.247"></a>
<span class="sourceLineNo">248</span><a name="line.248"></a>
<span class="sourceLineNo">249</span> /**<a name="line.249"></a>
<span class="sourceLineNo">250</span> * Create a new histogram with size range counts.<a name="line.250"></a>
<span class="sourceLineNo">251</span> * @param name Name of the histogram.<a name="line.251"></a>
<span class="sourceLineNo">252</span> * @return A new MutableSizeHistogram<a name="line.252"></a>
<span class="sourceLineNo">253</span> */<a name="line.253"></a>
<span class="sourceLineNo">254</span> public MutableSizeHistogram newSizeHistogram(String name) {<a name="line.254"></a>
<span class="sourceLineNo">255</span> return newSizeHistogram(name, "");<a name="line.255"></a>
<span class="sourceLineNo">256</span> }<a name="line.256"></a>
<span class="sourceLineNo">257</span><a name="line.257"></a>
<span class="sourceLineNo">258</span> /**<a name="line.258"></a>
<span class="sourceLineNo">259</span> * Create a new histogram with size range counts.<a name="line.259"></a>
<span class="sourceLineNo">260</span> * @param name The name of the histogram<a name="line.260"></a>
<span class="sourceLineNo">261</span> * @param desc The description of the data in the histogram.<a name="line.261"></a>
<span class="sourceLineNo">262</span> * @return A new MutableSizeHistogram<a name="line.262"></a>
<span class="sourceLineNo">263</span> */<a name="line.263"></a>
<span class="sourceLineNo">264</span> public MutableSizeHistogram newSizeHistogram(String name, String desc) {<a name="line.264"></a>
<span class="sourceLineNo">265</span> MutableSizeHistogram histo = new MutableSizeHistogram(name, desc);<a name="line.265"></a>
<span class="sourceLineNo">266</span> return addNewMetricIfAbsent(name, histo, MutableSizeHistogram.class);<a name="line.266"></a>
<span class="sourceLineNo">267</span> }<a name="line.267"></a>
<span class="sourceLineNo">268</span><a name="line.268"></a>
<span class="sourceLineNo">269</span> synchronized void add(String name, MutableMetric metric) {<a name="line.269"></a>
<span class="sourceLineNo">270</span> addNewMetricIfAbsent(name, metric, MutableMetric.class);<a name="line.270"></a>
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<span class="sourceLineNo">272</span><a name="line.272"></a>
<span class="sourceLineNo">273</span> /**<a name="line.273"></a>
<span class="sourceLineNo">274</span> * Add sample to a stat metric by name.<a name="line.274"></a>
<span class="sourceLineNo">275</span> * @param name of the metric<a name="line.275"></a>
<span class="sourceLineNo">276</span> * @param value of the snapshot to add<a name="line.276"></a>
<span class="sourceLineNo">277</span> */<a name="line.277"></a>
<span class="sourceLineNo">278</span> public void add(String name, long value) {<a name="line.278"></a>
<span class="sourceLineNo">279</span> MutableMetric m = metricsMap.get(name);<a name="line.279"></a>
<span class="sourceLineNo">280</span><a name="line.280"></a>
<span class="sourceLineNo">281</span> if (m != null) {<a name="line.281"></a>
<span class="sourceLineNo">282</span> if (m instanceof MutableStat) {<a name="line.282"></a>
<span class="sourceLineNo">283</span> ((MutableStat) m).add(value);<a name="line.283"></a>
<span class="sourceLineNo">284</span> } else {<a name="line.284"></a>
<span class="sourceLineNo">285</span> throw new MetricsException("Unsupported add(value) for metric " + name);<a name="line.285"></a>
<span class="sourceLineNo">286</span> }<a name="line.286"></a>
<span class="sourceLineNo">287</span> } else {<a name="line.287"></a>
<span class="sourceLineNo">288</span> metricsMap.put(name, newRate(name)); // default is a rate metric<a name="line.288"></a>
<span class="sourceLineNo">289</span> add(name, value);<a name="line.289"></a>
<span class="sourceLineNo">290</span> }<a name="line.290"></a>
<span class="sourceLineNo">291</span> }<a name="line.291"></a>
<span class="sourceLineNo">292</span><a name="line.292"></a>
<span class="sourceLineNo">293</span> /**<a name="line.293"></a>
<span class="sourceLineNo">294</span> * Set the metrics context tag<a name="line.294"></a>
<span class="sourceLineNo">295</span> * @param name of the context<a name="line.295"></a>
<span class="sourceLineNo">296</span> * @return the registry itself as a convenience<a name="line.296"></a>
<span class="sourceLineNo">297</span> */<a name="line.297"></a>
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<span class="sourceLineNo">299</span> return tag(MsInfo.Context, name, true);<a name="line.299"></a>
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<span class="sourceLineNo">301</span><a name="line.301"></a>
<span class="sourceLineNo">302</span> /**<a name="line.302"></a>
<span class="sourceLineNo">303</span> * Add a tag to the metrics<a name="line.303"></a>
<span class="sourceLineNo">304</span> * @param name of the tag<a name="line.304"></a>
<span class="sourceLineNo">305</span> * @param description of the tag<a name="line.305"></a>
<span class="sourceLineNo">306</span> * @param value of the tag<a name="line.306"></a>
<span class="sourceLineNo">307</span> * @return the registry (for keep adding tags)<a name="line.307"></a>
<span class="sourceLineNo">308</span> */<a name="line.308"></a>
<span class="sourceLineNo">309</span> public DynamicMetricsRegistry tag(String name, String description, String value) {<a name="line.309"></a>
<span class="sourceLineNo">310</span> return tag(name, description, value, false);<a name="line.310"></a>
<span class="sourceLineNo">311</span> }<a name="line.311"></a>
<span class="sourceLineNo">312</span><a name="line.312"></a>
<span class="sourceLineNo">313</span> /**<a name="line.313"></a>
<span class="sourceLineNo">314</span> * Add a tag to the metrics<a name="line.314"></a>
<span class="sourceLineNo">315</span> * @param name of the tag<a name="line.315"></a>
<span class="sourceLineNo">316</span> * @param description of the tag<a name="line.316"></a>
<span class="sourceLineNo">317</span> * @param value of the tag<a name="line.317"></a>
<span class="sourceLineNo">318</span> * @param override existing tag if true<a name="line.318"></a>
<span class="sourceLineNo">319</span> * @return the registry (for keep adding tags)<a name="line.319"></a>
<span class="sourceLineNo">320</span> */<a name="line.320"></a>
<span class="sourceLineNo">321</span> public DynamicMetricsRegistry tag(String name, String description, String value,<a name="line.321"></a>
<span class="sourceLineNo">322</span> boolean override) {<a name="line.322"></a>
<span class="sourceLineNo">323</span> return tag(new MetricsInfoImpl(name, description), value, override);<a name="line.323"></a>
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<span class="sourceLineNo">325</span><a name="line.325"></a>
<span class="sourceLineNo">326</span> /**<a name="line.326"></a>
<span class="sourceLineNo">327</span> * Add a tag to the metrics<a name="line.327"></a>
<span class="sourceLineNo">328</span> * @param info metadata of the tag<a name="line.328"></a>
<span class="sourceLineNo">329</span> * @param value of the tag<a name="line.329"></a>
<span class="sourceLineNo">330</span> * @param override existing tag if true<a name="line.330"></a>
<span class="sourceLineNo">331</span> * @return the registry (for keep adding tags etc.)<a name="line.331"></a>
<span class="sourceLineNo">332</span> */<a name="line.332"></a>
<span class="sourceLineNo">333</span> public DynamicMetricsRegistry tag(MetricsInfo info, String value, boolean override) {<a name="line.333"></a>
<span class="sourceLineNo">334</span> MetricsTag tag = Interns.tag(info, value);<a name="line.334"></a>
<span class="sourceLineNo">335</span><a name="line.335"></a>
<span class="sourceLineNo">336</span> if (!override) {<a name="line.336"></a>
<span class="sourceLineNo">337</span> MetricsTag existing = tagsMap.putIfAbsent(info.name(), tag);<a name="line.337"></a>
<span class="sourceLineNo">338</span> if (existing != null) {<a name="line.338"></a>
<span class="sourceLineNo">339</span> throw new MetricsException("Tag " + info.name() + " already exists!");<a name="line.339"></a>
<span class="sourceLineNo">340</span> }<a name="line.340"></a>
<span class="sourceLineNo">341</span> return this;<a name="line.341"></a>
<span class="sourceLineNo">342</span> }<a name="line.342"></a>
<span class="sourceLineNo">343</span><a name="line.343"></a>
<span class="sourceLineNo">344</span> tagsMap.put(info.name(), tag);<a name="line.344"></a>
<span class="sourceLineNo">345</span><a name="line.345"></a>
<span class="sourceLineNo">346</span> return this;<a name="line.346"></a>
<span class="sourceLineNo">347</span> }<a name="line.347"></a>
<span class="sourceLineNo">348</span><a name="line.348"></a>
<span class="sourceLineNo">349</span> public DynamicMetricsRegistry tag(MetricsInfo info, String value) {<a name="line.349"></a>
<span class="sourceLineNo">350</span> return tag(info, value, false);<a name="line.350"></a>
<span class="sourceLineNo">351</span> }<a name="line.351"></a>
<span class="sourceLineNo">352</span><a name="line.352"></a>
<span class="sourceLineNo">353</span> Collection&lt;MetricsTag&gt; tags() {<a name="line.353"></a>
<span class="sourceLineNo">354</span> return tagsMap.values();<a name="line.354"></a>
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<span class="sourceLineNo">356</span><a name="line.356"></a>
<span class="sourceLineNo">357</span> Collection&lt;MutableMetric&gt; metrics() {<a name="line.357"></a>
<span class="sourceLineNo">358</span> return metricsMap.values();<a name="line.358"></a>
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<span class="sourceLineNo">360</span><a name="line.360"></a>
<span class="sourceLineNo">361</span> /**<a name="line.361"></a>
<span class="sourceLineNo">362</span> * Sample all the mutable metrics and put the snapshot in the builder<a name="line.362"></a>
<span class="sourceLineNo">363</span> * @param builder to contain the metrics snapshot<a name="line.363"></a>
<span class="sourceLineNo">364</span> * @param all get all the metrics even if the values are not changed.<a name="line.364"></a>
<span class="sourceLineNo">365</span> */<a name="line.365"></a>
<span class="sourceLineNo">366</span> public void snapshot(MetricsRecordBuilder builder, boolean all) {<a name="line.366"></a>
<span class="sourceLineNo">367</span> for (MetricsTag tag : tags()) {<a name="line.367"></a>
<span class="sourceLineNo">368</span> builder.add(tag);<a name="line.368"></a>
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<span class="sourceLineNo">370</span> for (MutableMetric metric : metrics()) {<a name="line.370"></a>
<span class="sourceLineNo">371</span> metric.snapshot(builder, all);<a name="line.371"></a>
<span class="sourceLineNo">372</span> }<a name="line.372"></a>
<span class="sourceLineNo">373</span> }<a name="line.373"></a>
<span class="sourceLineNo">374</span><a name="line.374"></a>
<span class="sourceLineNo">375</span> @Override<a name="line.375"></a>
<span class="sourceLineNo">376</span> public String toString() {<a name="line.376"></a>
<span class="sourceLineNo">377</span> return MoreObjects.toStringHelper(this).add("info", metricsInfo).add("tags", tags())<a name="line.377"></a>
<span class="sourceLineNo">378</span> .add("metrics", metrics()).toString();<a name="line.378"></a>
<span class="sourceLineNo">379</span> }<a name="line.379"></a>
<span class="sourceLineNo">380</span><a name="line.380"></a>
<span class="sourceLineNo">381</span> /**<a name="line.381"></a>
<span class="sourceLineNo">382</span> * Removes metric by name<a name="line.382"></a>
<span class="sourceLineNo">383</span> * @param name name of the metric to remove<a name="line.383"></a>
<span class="sourceLineNo">384</span> */<a name="line.384"></a>
<span class="sourceLineNo">385</span> public void removeMetric(String name) {<a name="line.385"></a>
<span class="sourceLineNo">386</span> helper.removeObjectName(name);<a name="line.386"></a>
<span class="sourceLineNo">387</span> metricsMap.remove(name);<a name="line.387"></a>
<span class="sourceLineNo">388</span> }<a name="line.388"></a>
<span class="sourceLineNo">389</span><a name="line.389"></a>
<span class="sourceLineNo">390</span> public void removeHistogramMetrics(String baseName) {<a name="line.390"></a>
<span class="sourceLineNo">391</span> for (String suffix : histogramSuffixes) {<a name="line.391"></a>
<span class="sourceLineNo">392</span> helper.removeObjectName(baseName + suffix);<a name="line.392"></a>
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<span class="sourceLineNo">394</span> metricsMap.remove(baseName);<a name="line.394"></a>
<span class="sourceLineNo">395</span> }<a name="line.395"></a>
<span class="sourceLineNo">396</span><a name="line.396"></a>
<span class="sourceLineNo">397</span> /**<a name="line.397"></a>
<span class="sourceLineNo">398</span> * Get a MetricMutableGaugeLong from the storage. If it is not there atomically put it.<a name="line.398"></a>
<span class="sourceLineNo">399</span> * @param gaugeName name of the gauge to create or get.<a name="line.399"></a>
<span class="sourceLineNo">400</span> * @param potentialStartingValue value of the new gauge if we have to create it.<a name="line.400"></a>
<span class="sourceLineNo">401</span> */<a name="line.401"></a>
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<span class="sourceLineNo">403</span> // Try and get the guage.<a name="line.403"></a>
<span class="sourceLineNo">404</span> MutableMetric metric = metricsMap.get(gaugeName);<a name="line.404"></a>
<span class="sourceLineNo">405</span><a name="line.405"></a>
<span class="sourceLineNo">406</span> // If it's not there then try and put a new one in the storage.<a name="line.406"></a>
<span class="sourceLineNo">407</span> if (metric == null) {<a name="line.407"></a>
<span class="sourceLineNo">408</span><a name="line.408"></a>
<span class="sourceLineNo">409</span> // Create the potential new gauge.<a name="line.409"></a>
<span class="sourceLineNo">410</span> MutableGaugeLong newGauge =<a name="line.410"></a>
<span class="sourceLineNo">411</span> new MutableGaugeLong(new MetricsInfoImpl(gaugeName, ""), potentialStartingValue);<a name="line.411"></a>
<span class="sourceLineNo">412</span><a name="line.412"></a>
<span class="sourceLineNo">413</span> // Try and put the gauge in. This is atomic.<a name="line.413"></a>
<span class="sourceLineNo">414</span> metric = metricsMap.putIfAbsent(gaugeName, newGauge);<a name="line.414"></a>
<span class="sourceLineNo">415</span><a name="line.415"></a>
<span class="sourceLineNo">416</span> // If the value we get back is null then the put was successful and we will return that.<a name="line.416"></a>
<span class="sourceLineNo">417</span> // otherwise gaugeLong should contain the thing that was in before the put could be completed.<a name="line.417"></a>
<span class="sourceLineNo">418</span> if (metric == null) {<a name="line.418"></a>
<span class="sourceLineNo">419</span> return newGauge;<a name="line.419"></a>
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<span class="sourceLineNo">421</span> }<a name="line.421"></a>
<span class="sourceLineNo">422</span><a name="line.422"></a>
<span class="sourceLineNo">423</span> if (!(metric instanceof MutableGaugeLong)) {<a name="line.423"></a>
<span class="sourceLineNo">424</span> throw new MetricsException("Metric already exists in registry for metric name: " + gaugeName<a name="line.424"></a>
<span class="sourceLineNo">425</span> + " and not of type MetricMutableGaugeLong");<a name="line.425"></a>
<span class="sourceLineNo">426</span> }<a name="line.426"></a>
<span class="sourceLineNo">427</span><a name="line.427"></a>
<span class="sourceLineNo">428</span> return (MutableGaugeLong) metric;<a name="line.428"></a>
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<span class="sourceLineNo">430</span><a name="line.430"></a>
<span class="sourceLineNo">431</span> /**<a name="line.431"></a>
<span class="sourceLineNo">432</span> * Get a MetricMutableGaugeInt from the storage. If it is not there atomically put it.<a name="line.432"></a>
<span class="sourceLineNo">433</span> * @param gaugeName name of the gauge to create or get.<a name="line.433"></a>
<span class="sourceLineNo">434</span> * @param potentialStartingValue value of the new gauge if we have to create it.<a name="line.434"></a>
<span class="sourceLineNo">435</span> */<a name="line.435"></a>
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<span class="sourceLineNo">437</span> // Try and get the guage.<a name="line.437"></a>
<span class="sourceLineNo">438</span> MutableMetric metric = metricsMap.get(gaugeName);<a name="line.438"></a>
<span class="sourceLineNo">439</span><a name="line.439"></a>
<span class="sourceLineNo">440</span> // If it's not there then try and put a new one in the storage.<a name="line.440"></a>
<span class="sourceLineNo">441</span> if (metric == null) {<a name="line.441"></a>
<span class="sourceLineNo">442</span> // Create the potential new gauge.<a name="line.442"></a>
<span class="sourceLineNo">443</span> MutableGaugeInt newGauge =<a name="line.443"></a>
<span class="sourceLineNo">444</span> new MutableGaugeInt(new MetricsInfoImpl(gaugeName, ""), potentialStartingValue);<a name="line.444"></a>
<span class="sourceLineNo">445</span><a name="line.445"></a>
<span class="sourceLineNo">446</span> // Try and put the gauge in. This is atomic.<a name="line.446"></a>
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<span class="sourceLineNo">448</span><a name="line.448"></a>
<span class="sourceLineNo">449</span> // If the value we get back is null then the put was successful and we will return that.<a name="line.449"></a>
<span class="sourceLineNo">450</span> // otherwise gaugeInt should contain the thing that was in before the put could be completed.<a name="line.450"></a>
<span class="sourceLineNo">451</span> if (metric == null) {<a name="line.451"></a>
<span class="sourceLineNo">452</span> return newGauge;<a name="line.452"></a>
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<span class="sourceLineNo">454</span> }<a name="line.454"></a>
<span class="sourceLineNo">455</span><a name="line.455"></a>
<span class="sourceLineNo">456</span> if (!(metric instanceof MutableGaugeInt)) {<a name="line.456"></a>
<span class="sourceLineNo">457</span> throw new MetricsException("Metric already exists in registry for metric name: " + gaugeName<a name="line.457"></a>
<span class="sourceLineNo">458</span> + " and not of type MetricMutableGaugeInr");<a name="line.458"></a>
<span class="sourceLineNo">459</span> }<a name="line.459"></a>
<span class="sourceLineNo">460</span><a name="line.460"></a>
<span class="sourceLineNo">461</span> return (MutableGaugeInt) metric;<a name="line.461"></a>
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<span class="sourceLineNo">463</span><a name="line.463"></a>
<span class="sourceLineNo">464</span> /**<a name="line.464"></a>
<span class="sourceLineNo">465</span> * Get a MetricMutableCounterLong from the storage. If it is not there atomically put it.<a name="line.465"></a>
<span class="sourceLineNo">466</span> * @param counterName Name of the counter to get<a name="line.466"></a>
<span class="sourceLineNo">467</span> * @param potentialStartingValue starting value if we have to create a new counter<a name="line.467"></a>
<span class="sourceLineNo">468</span> */<a name="line.468"></a>
<span class="sourceLineNo">469</span> public MutableFastCounter getCounter(String counterName, long potentialStartingValue) {<a name="line.469"></a>
<span class="sourceLineNo">470</span> // See getGauge for description on how this works.<a name="line.470"></a>
<span class="sourceLineNo">471</span> MutableMetric counter = metricsMap.get(counterName);<a name="line.471"></a>
<span class="sourceLineNo">472</span> if (counter == null) {<a name="line.472"></a>
<span class="sourceLineNo">473</span> MutableFastCounter newCounter =<a name="line.473"></a>
<span class="sourceLineNo">474</span> new MutableFastCounter(new MetricsInfoImpl(counterName, ""), potentialStartingValue);<a name="line.474"></a>
<span class="sourceLineNo">475</span> counter = metricsMap.putIfAbsent(counterName, newCounter);<a name="line.475"></a>
<span class="sourceLineNo">476</span> if (counter == null) {<a name="line.476"></a>
<span class="sourceLineNo">477</span> return newCounter;<a name="line.477"></a>
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<span class="sourceLineNo">479</span> }<a name="line.479"></a>
<span class="sourceLineNo">480</span><a name="line.480"></a>
<span class="sourceLineNo">481</span> if (!(counter instanceof MutableCounter)) {<a name="line.481"></a>
<span class="sourceLineNo">482</span> throw new MetricsException("Metric already exists in registry for metric name: " + counterName<a name="line.482"></a>
<span class="sourceLineNo">483</span> + " and not of type MutableCounter");<a name="line.483"></a>
<span class="sourceLineNo">484</span> }<a name="line.484"></a>
<span class="sourceLineNo">485</span><a name="line.485"></a>
<span class="sourceLineNo">486</span> return (MutableFastCounter) counter;<a name="line.486"></a>
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<span class="sourceLineNo">488</span><a name="line.488"></a>
<span class="sourceLineNo">489</span> public MutableHistogram getHistogram(String histoName) {<a name="line.489"></a>
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<span class="sourceLineNo">491</span> MutableMetric histo = metricsMap.get(histoName);<a name="line.491"></a>
<span class="sourceLineNo">492</span> if (histo == null) {<a name="line.492"></a>
<span class="sourceLineNo">493</span> MutableHistogram newCounter = new MutableHistogram(new MetricsInfoImpl(histoName, ""));<a name="line.493"></a>
<span class="sourceLineNo">494</span> histo = metricsMap.putIfAbsent(histoName, newCounter);<a name="line.494"></a>
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<span class="sourceLineNo">496</span> return newCounter;<a name="line.496"></a>
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<span class="sourceLineNo">498</span> }<a name="line.498"></a>
<span class="sourceLineNo">499</span><a name="line.499"></a>
<span class="sourceLineNo">500</span> if (!(histo instanceof MutableHistogram)) {<a name="line.500"></a>
<span class="sourceLineNo">501</span> throw new MetricsException("Metric already exists in registry for metric name: " + histoName<a name="line.501"></a>
<span class="sourceLineNo">502</span> + " and not of type MutableHistogram");<a name="line.502"></a>
<span class="sourceLineNo">503</span> }<a name="line.503"></a>
<span class="sourceLineNo">504</span><a name="line.504"></a>
<span class="sourceLineNo">505</span> return (MutableHistogram) histo;<a name="line.505"></a>
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<span class="sourceLineNo">507</span><a name="line.507"></a>
<span class="sourceLineNo">508</span> private &lt;T extends MutableMetric&gt; T addNewMetricIfAbsent(String name, T ret,<a name="line.508"></a>
<span class="sourceLineNo">509</span> Class&lt;T&gt; metricClass) {<a name="line.509"></a>
<span class="sourceLineNo">510</span> // If the value we get back is null then the put was successful and we will<a name="line.510"></a>
<span class="sourceLineNo">511</span> // return that. Otherwise metric should contain the thing that was in<a name="line.511"></a>
<span class="sourceLineNo">512</span> // before the put could be completed.<a name="line.512"></a>
<span class="sourceLineNo">513</span> MutableMetric metric = metricsMap.putIfAbsent(name, ret);<a name="line.513"></a>
<span class="sourceLineNo">514</span> if (metric == null) {<a name="line.514"></a>
<span class="sourceLineNo">515</span> return ret;<a name="line.515"></a>
<span class="sourceLineNo">516</span> }<a name="line.516"></a>
<span class="sourceLineNo">517</span><a name="line.517"></a>
<span class="sourceLineNo">518</span> return returnExistingWithCast(metric, metricClass, name);<a name="line.518"></a>
<span class="sourceLineNo">519</span> }<a name="line.519"></a>
<span class="sourceLineNo">520</span><a name="line.520"></a>
<span class="sourceLineNo">521</span> @SuppressWarnings("unchecked")<a name="line.521"></a>
<span class="sourceLineNo">522</span> private &lt;T&gt; T returnExistingWithCast(MutableMetric metric, Class&lt;T&gt; metricClass, String name) {<a name="line.522"></a>
<span class="sourceLineNo">523</span> if (!metricClass.isAssignableFrom(metric.getClass())) {<a name="line.523"></a>
<span class="sourceLineNo">524</span> throw new MetricsException("Metric already exists in registry for metric name: " + name<a name="line.524"></a>
<span class="sourceLineNo">525</span> + " and not of type " + metricClass + " but instead of type " + metric.getClass());<a name="line.525"></a>
<span class="sourceLineNo">526</span> }<a name="line.526"></a>
<span class="sourceLineNo">527</span><a name="line.527"></a>
<span class="sourceLineNo">528</span> return (T) metric;<a name="line.528"></a>
<span class="sourceLineNo">529</span> }<a name="line.529"></a>
<span class="sourceLineNo">530</span><a name="line.530"></a>
<span class="sourceLineNo">531</span> public void clearMetrics() {<a name="line.531"></a>
<span class="sourceLineNo">532</span> for (String name : metricsMap.keySet()) {<a name="line.532"></a>
<span class="sourceLineNo">533</span> helper.removeObjectName(name);<a name="line.533"></a>
<span class="sourceLineNo">534</span> }<a name="line.534"></a>
<span class="sourceLineNo">535</span> metricsMap.clear();<a name="line.535"></a>
<span class="sourceLineNo">536</span> }<a name="line.536"></a>
<span class="sourceLineNo">537</span><a name="line.537"></a>
<span class="sourceLineNo">538</span> @RestrictedApi(explanation = "Should only be called in TestMetricsTableMetricsMap", link = "",<a name="line.538"></a>
<span class="sourceLineNo">539</span> allowedOnPath = ".*/(DynamicMetricsRegistry|TestMetricsTableMetricsMap).java")<a name="line.539"></a>
<span class="sourceLineNo">540</span> public ConcurrentMap&lt;String, MutableMetric&gt; getMetricsMap() {<a name="line.540"></a>
<span class="sourceLineNo">541</span> return metricsMap;<a name="line.541"></a>
<span class="sourceLineNo">542</span> }<a name="line.542"></a>
<span class="sourceLineNo">543</span>}<a name="line.543"></a>
</pre>
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