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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.coprocessor;</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.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.List;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.Optional;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.Set;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.concurrent.ConcurrentHashMap;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.commons.lang3.StringUtils;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.Cell;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.CoprocessorEnvironment;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.TableName;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.client.Delete;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.client.Durability;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.client.Get;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.client.Put;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.client.Row;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.ipc.RpcServer;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.metrics.MetricRegistry;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.util.LossyCounting;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.wal.WALEdit;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">041</span><span id="line-41"></span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hbase.thirdparty.com.google.common.collect.ImmutableMap;</span> |
| <span class="source-line-no">043</span><span id="line-43"></span> |
| <span class="source-line-no">044</span><span id="line-44">/**</span> |
| <span class="source-line-no">045</span><span id="line-45"> * A coprocessor that collects metrics from meta table.</span> |
| <span class="source-line-no">046</span><span id="line-46"> * <p></span> |
| <span class="source-line-no">047</span><span id="line-47"> * These metrics will be available through the regular Hadoop metrics2 sinks (ganglia, opentsdb,</span> |
| <span class="source-line-no">048</span><span id="line-48"> * etc) as well as JMX output.</span> |
| <span class="source-line-no">049</span><span id="line-49"> * </p></span> |
| <span class="source-line-no">050</span><span id="line-50"> * @see MetaTableMetrics</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">@InterfaceAudience.Private</span> |
| <span class="source-line-no">054</span><span id="line-54">public class MetaTableMetrics implements RegionCoprocessor {</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> private ExampleRegionObserverMeta observer;</span> |
| <span class="source-line-no">057</span><span id="line-57"> private MetricRegistry registry;</span> |
| <span class="source-line-no">058</span><span id="line-58"> private LossyCounting<String> clientMetricsLossyCounting, regionMetricsLossyCounting;</span> |
| <span class="source-line-no">059</span><span id="line-59"> private boolean active = false;</span> |
| <span class="source-line-no">060</span><span id="line-60"> private Set<String> metrics = ConcurrentHashMap.newKeySet();</span> |
| <span class="source-line-no">061</span><span id="line-61"></span> |
| <span class="source-line-no">062</span><span id="line-62"> enum MetaTableOps {</span> |
| <span class="source-line-no">063</span><span id="line-63"> GET,</span> |
| <span class="source-line-no">064</span><span id="line-64"> PUT,</span> |
| <span class="source-line-no">065</span><span id="line-65"> DELETE,</span> |
| <span class="source-line-no">066</span><span id="line-66"> }</span> |
| <span class="source-line-no">067</span><span id="line-67"></span> |
| <span class="source-line-no">068</span><span id="line-68"> private ImmutableMap<Class<? extends Row>, MetaTableOps> opsNameMap =</span> |
| <span class="source-line-no">069</span><span id="line-69"> ImmutableMap.<Class<? extends Row>, MetaTableOps> builder().put(Put.class, MetaTableOps.PUT)</span> |
| <span class="source-line-no">070</span><span id="line-70"> .put(Get.class, MetaTableOps.GET).put(Delete.class, MetaTableOps.DELETE).build();</span> |
| <span class="source-line-no">071</span><span id="line-71"></span> |
| <span class="source-line-no">072</span><span id="line-72"> class ExampleRegionObserverMeta implements RegionCoprocessor, RegionObserver {</span> |
| <span class="source-line-no">073</span><span id="line-73"></span> |
| <span class="source-line-no">074</span><span id="line-74"> @Override</span> |
| <span class="source-line-no">075</span><span id="line-75"> public Optional<RegionObserver> getRegionObserver() {</span> |
| <span class="source-line-no">076</span><span id="line-76"> return Optional.of(this);</span> |
| <span class="source-line-no">077</span><span id="line-77"> }</span> |
| <span class="source-line-no">078</span><span id="line-78"></span> |
| <span class="source-line-no">079</span><span id="line-79"> @Override</span> |
| <span class="source-line-no">080</span><span id="line-80"> public void preGetOp(ObserverContext<RegionCoprocessorEnvironment> e, Get get,</span> |
| <span class="source-line-no">081</span><span id="line-81"> List<Cell> results) throws IOException {</span> |
| <span class="source-line-no">082</span><span id="line-82"> registerAndMarkMetrics(e, get);</span> |
| <span class="source-line-no">083</span><span id="line-83"> }</span> |
| <span class="source-line-no">084</span><span id="line-84"></span> |
| <span class="source-line-no">085</span><span id="line-85"> @Override</span> |
| <span class="source-line-no">086</span><span id="line-86"> public void prePut(ObserverContext<RegionCoprocessorEnvironment> e, Put put, WALEdit edit,</span> |
| <span class="source-line-no">087</span><span id="line-87"> Durability durability) throws IOException {</span> |
| <span class="source-line-no">088</span><span id="line-88"> registerAndMarkMetrics(e, put);</span> |
| <span class="source-line-no">089</span><span id="line-89"> }</span> |
| <span class="source-line-no">090</span><span id="line-90"></span> |
| <span class="source-line-no">091</span><span id="line-91"> @Override</span> |
| <span class="source-line-no">092</span><span id="line-92"> public void preDelete(ObserverContext<RegionCoprocessorEnvironment> e, Delete delete,</span> |
| <span class="source-line-no">093</span><span id="line-93"> WALEdit edit, Durability durability) {</span> |
| <span class="source-line-no">094</span><span id="line-94"> registerAndMarkMetrics(e, delete);</span> |
| <span class="source-line-no">095</span><span id="line-95"> }</span> |
| <span class="source-line-no">096</span><span id="line-96"></span> |
| <span class="source-line-no">097</span><span id="line-97"> private void registerAndMarkMetrics(ObserverContext<RegionCoprocessorEnvironment> e, Row row) {</span> |
| <span class="source-line-no">098</span><span id="line-98"> if (!active || !isMetaTableOp(e)) {</span> |
| <span class="source-line-no">099</span><span id="line-99"> return;</span> |
| <span class="source-line-no">100</span><span id="line-100"> }</span> |
| <span class="source-line-no">101</span><span id="line-101"> tableMetricRegisterAndMark(row);</span> |
| <span class="source-line-no">102</span><span id="line-102"> clientMetricRegisterAndMark();</span> |
| <span class="source-line-no">103</span><span id="line-103"> regionMetricRegisterAndMark(row);</span> |
| <span class="source-line-no">104</span><span id="line-104"> opMetricRegisterAndMark(row);</span> |
| <span class="source-line-no">105</span><span id="line-105"> opWithClientMetricRegisterAndMark(row);</span> |
| <span class="source-line-no">106</span><span id="line-106"> }</span> |
| <span class="source-line-no">107</span><span id="line-107"></span> |
| <span class="source-line-no">108</span><span id="line-108"> /**</span> |
| <span class="source-line-no">109</span><span id="line-109"> * Get table name from Ops such as: get, put, delete.</span> |
| <span class="source-line-no">110</span><span id="line-110"> * @param op such as get, put or delete.</span> |
| <span class="source-line-no">111</span><span id="line-111"> */</span> |
| <span class="source-line-no">112</span><span id="line-112"> private String getTableNameFromOp(Row op) {</span> |
| <span class="source-line-no">113</span><span id="line-113"> final String tableRowKey = Bytes.toString(op.getRow());</span> |
| <span class="source-line-no">114</span><span id="line-114"> if (StringUtils.isEmpty(tableRowKey)) {</span> |
| <span class="source-line-no">115</span><span id="line-115"> return null;</span> |
| <span class="source-line-no">116</span><span id="line-116"> }</span> |
| <span class="source-line-no">117</span><span id="line-117"> final String[] splits = tableRowKey.split(",");</span> |
| <span class="source-line-no">118</span><span id="line-118"> return splits.length > 0 ? splits[0] : null;</span> |
| <span class="source-line-no">119</span><span id="line-119"> }</span> |
| <span class="source-line-no">120</span><span id="line-120"></span> |
| <span class="source-line-no">121</span><span id="line-121"> /**</span> |
| <span class="source-line-no">122</span><span id="line-122"> * Get regionId from Ops such as: get, put, delete.</span> |
| <span class="source-line-no">123</span><span id="line-123"> * @param op such as get, put or delete.</span> |
| <span class="source-line-no">124</span><span id="line-124"> */</span> |
| <span class="source-line-no">125</span><span id="line-125"> private String getRegionIdFromOp(Row op) {</span> |
| <span class="source-line-no">126</span><span id="line-126"> final String tableRowKey = Bytes.toString(op.getRow());</span> |
| <span class="source-line-no">127</span><span id="line-127"> if (StringUtils.isEmpty(tableRowKey)) {</span> |
| <span class="source-line-no">128</span><span id="line-128"> return null;</span> |
| <span class="source-line-no">129</span><span id="line-129"> }</span> |
| <span class="source-line-no">130</span><span id="line-130"> final String[] splits = tableRowKey.split(",");</span> |
| <span class="source-line-no">131</span><span id="line-131"> return splits.length > 2 ? splits[2] : null;</span> |
| <span class="source-line-no">132</span><span id="line-132"> }</span> |
| <span class="source-line-no">133</span><span id="line-133"></span> |
| <span class="source-line-no">134</span><span id="line-134"> private boolean isMetaTableOp(ObserverContext<RegionCoprocessorEnvironment> e) {</span> |
| <span class="source-line-no">135</span><span id="line-135"> return TableName.META_TABLE_NAME.equals(e.getEnvironment().getRegionInfo().getTable());</span> |
| <span class="source-line-no">136</span><span id="line-136"> }</span> |
| <span class="source-line-no">137</span><span id="line-137"></span> |
| <span class="source-line-no">138</span><span id="line-138"> private void clientMetricRegisterAndMark() {</span> |
| <span class="source-line-no">139</span><span id="line-139"> // Mark client metric</span> |
| <span class="source-line-no">140</span><span id="line-140"> String clientIP = RpcServer.getRemoteIp() != null ? RpcServer.getRemoteIp().toString() : null;</span> |
| <span class="source-line-no">141</span><span id="line-141"> if (clientIP == null || clientIP.isEmpty()) {</span> |
| <span class="source-line-no">142</span><span id="line-142"> return;</span> |
| <span class="source-line-no">143</span><span id="line-143"> }</span> |
| <span class="source-line-no">144</span><span id="line-144"> String clientRequestMeter = clientRequestMeterName(clientIP);</span> |
| <span class="source-line-no">145</span><span id="line-145"> clientMetricsLossyCounting.add(clientRequestMeter);</span> |
| <span class="source-line-no">146</span><span id="line-146"> registerAndMarkMeter(clientRequestMeter);</span> |
| <span class="source-line-no">147</span><span id="line-147"> }</span> |
| <span class="source-line-no">148</span><span id="line-148"></span> |
| <span class="source-line-no">149</span><span id="line-149"> private void tableMetricRegisterAndMark(Row op) {</span> |
| <span class="source-line-no">150</span><span id="line-150"> // Mark table metric</span> |
| <span class="source-line-no">151</span><span id="line-151"> String tableName = getTableNameFromOp(op);</span> |
| <span class="source-line-no">152</span><span id="line-152"> if (tableName == null || tableName.isEmpty()) {</span> |
| <span class="source-line-no">153</span><span id="line-153"> return;</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 tableRequestMeter = tableMeterName(tableName);</span> |
| <span class="source-line-no">156</span><span id="line-156"> registerAndMarkMeter(tableRequestMeter);</span> |
| <span class="source-line-no">157</span><span id="line-157"> }</span> |
| <span class="source-line-no">158</span><span id="line-158"></span> |
| <span class="source-line-no">159</span><span id="line-159"> private void regionMetricRegisterAndMark(Row op) {</span> |
| <span class="source-line-no">160</span><span id="line-160"> // Mark region metric</span> |
| <span class="source-line-no">161</span><span id="line-161"> String regionId = getRegionIdFromOp(op);</span> |
| <span class="source-line-no">162</span><span id="line-162"> if (regionId == null || regionId.isEmpty()) {</span> |
| <span class="source-line-no">163</span><span id="line-163"> return;</span> |
| <span class="source-line-no">164</span><span id="line-164"> }</span> |
| <span class="source-line-no">165</span><span id="line-165"> String regionRequestMeter = regionMeterName(regionId);</span> |
| <span class="source-line-no">166</span><span id="line-166"> regionMetricsLossyCounting.add(regionRequestMeter);</span> |
| <span class="source-line-no">167</span><span id="line-167"> registerAndMarkMeter(regionRequestMeter);</span> |
| <span class="source-line-no">168</span><span id="line-168"> }</span> |
| <span class="source-line-no">169</span><span id="line-169"></span> |
| <span class="source-line-no">170</span><span id="line-170"> private void opMetricRegisterAndMark(Row op) {</span> |
| <span class="source-line-no">171</span><span id="line-171"> // Mark access type ["get", "put", "delete"] metric</span> |
| <span class="source-line-no">172</span><span id="line-172"> String opMeterName = opMeterName(op);</span> |
| <span class="source-line-no">173</span><span id="line-173"> if (opMeterName == null || opMeterName.isEmpty()) {</span> |
| <span class="source-line-no">174</span><span id="line-174"> return;</span> |
| <span class="source-line-no">175</span><span id="line-175"> }</span> |
| <span class="source-line-no">176</span><span id="line-176"> registerAndMarkMeter(opMeterName);</span> |
| <span class="source-line-no">177</span><span id="line-177"> }</span> |
| <span class="source-line-no">178</span><span id="line-178"></span> |
| <span class="source-line-no">179</span><span id="line-179"> private void opWithClientMetricRegisterAndMark(Object op) {</span> |
| <span class="source-line-no">180</span><span id="line-180"> // // Mark client + access type metric</span> |
| <span class="source-line-no">181</span><span id="line-181"> String opWithClientMeterName = opWithClientMeterName(op);</span> |
| <span class="source-line-no">182</span><span id="line-182"> if (opWithClientMeterName == null || opWithClientMeterName.isEmpty()) {</span> |
| <span class="source-line-no">183</span><span id="line-183"> return;</span> |
| <span class="source-line-no">184</span><span id="line-184"> }</span> |
| <span class="source-line-no">185</span><span id="line-185"> registerAndMarkMeter(opWithClientMeterName);</span> |
| <span class="source-line-no">186</span><span id="line-186"> }</span> |
| <span class="source-line-no">187</span><span id="line-187"></span> |
| <span class="source-line-no">188</span><span id="line-188"> // Helper function to register and mark meter if not present</span> |
| <span class="source-line-no">189</span><span id="line-189"> private void registerAndMarkMeter(String requestMeter) {</span> |
| <span class="source-line-no">190</span><span id="line-190"> if (requestMeter.isEmpty()) {</span> |
| <span class="source-line-no">191</span><span id="line-191"> return;</span> |
| <span class="source-line-no">192</span><span id="line-192"> }</span> |
| <span class="source-line-no">193</span><span id="line-193"> if (!registry.get(requestMeter).isPresent()) {</span> |
| <span class="source-line-no">194</span><span id="line-194"> metrics.add(requestMeter);</span> |
| <span class="source-line-no">195</span><span id="line-195"> }</span> |
| <span class="source-line-no">196</span><span id="line-196"> registry.meter(requestMeter).mark();</span> |
| <span class="source-line-no">197</span><span id="line-197"> }</span> |
| <span class="source-line-no">198</span><span id="line-198"></span> |
| <span class="source-line-no">199</span><span id="line-199"> private String opWithClientMeterName(Object op) {</span> |
| <span class="source-line-no">200</span><span id="line-200"> // Extract meter name containing the client IP</span> |
| <span class="source-line-no">201</span><span id="line-201"> String clientIP = RpcServer.getRemoteIp() != null ? RpcServer.getRemoteIp().toString() : "";</span> |
| <span class="source-line-no">202</span><span id="line-202"> if (clientIP.isEmpty()) {</span> |
| <span class="source-line-no">203</span><span id="line-203"> return "";</span> |
| <span class="source-line-no">204</span><span id="line-204"> }</span> |
| <span class="source-line-no">205</span><span id="line-205"> MetaTableOps ops = opsNameMap.get(op.getClass());</span> |
| <span class="source-line-no">206</span><span id="line-206"> if (ops == null) {</span> |
| <span class="source-line-no">207</span><span id="line-207"> return "";</span> |
| <span class="source-line-no">208</span><span id="line-208"> }</span> |
| <span class="source-line-no">209</span><span id="line-209"> switch (ops) {</span> |
| <span class="source-line-no">210</span><span id="line-210"> case GET:</span> |
| <span class="source-line-no">211</span><span id="line-211"> return String.format("MetaTable_client_%s_get_request", clientIP);</span> |
| <span class="source-line-no">212</span><span id="line-212"> case PUT:</span> |
| <span class="source-line-no">213</span><span id="line-213"> return String.format("MetaTable_client_%s_put_request", clientIP);</span> |
| <span class="source-line-no">214</span><span id="line-214"> case DELETE:</span> |
| <span class="source-line-no">215</span><span id="line-215"> return String.format("MetaTable_client_%s_delete_request", clientIP);</span> |
| <span class="source-line-no">216</span><span id="line-216"> default:</span> |
| <span class="source-line-no">217</span><span id="line-217"> return "";</span> |
| <span class="source-line-no">218</span><span id="line-218"> }</span> |
| <span class="source-line-no">219</span><span id="line-219"> }</span> |
| <span class="source-line-no">220</span><span id="line-220"></span> |
| <span class="source-line-no">221</span><span id="line-221"> private String opMeterName(Object op) {</span> |
| <span class="source-line-no">222</span><span id="line-222"> // Extract meter name containing the access type</span> |
| <span class="source-line-no">223</span><span id="line-223"> MetaTableOps ops = opsNameMap.get(op.getClass());</span> |
| <span class="source-line-no">224</span><span id="line-224"> if (ops == null) {</span> |
| <span class="source-line-no">225</span><span id="line-225"> return "";</span> |
| <span class="source-line-no">226</span><span id="line-226"> }</span> |
| <span class="source-line-no">227</span><span id="line-227"> switch (ops) {</span> |
| <span class="source-line-no">228</span><span id="line-228"> case GET:</span> |
| <span class="source-line-no">229</span><span id="line-229"> return "MetaTable_get_request";</span> |
| <span class="source-line-no">230</span><span id="line-230"> case PUT:</span> |
| <span class="source-line-no">231</span><span id="line-231"> return "MetaTable_put_request";</span> |
| <span class="source-line-no">232</span><span id="line-232"> case DELETE:</span> |
| <span class="source-line-no">233</span><span id="line-233"> return "MetaTable_delete_request";</span> |
| <span class="source-line-no">234</span><span id="line-234"> default:</span> |
| <span class="source-line-no">235</span><span id="line-235"> return "";</span> |
| <span class="source-line-no">236</span><span id="line-236"> }</span> |
| <span class="source-line-no">237</span><span id="line-237"> }</span> |
| <span class="source-line-no">238</span><span id="line-238"></span> |
| <span class="source-line-no">239</span><span id="line-239"> private String tableMeterName(String tableName) {</span> |
| <span class="source-line-no">240</span><span id="line-240"> // Extract meter name containing the table name</span> |
| <span class="source-line-no">241</span><span id="line-241"> return String.format("MetaTable_table_%s_request", tableName);</span> |
| <span class="source-line-no">242</span><span id="line-242"> }</span> |
| <span class="source-line-no">243</span><span id="line-243"></span> |
| <span class="source-line-no">244</span><span id="line-244"> private String clientRequestMeterName(String clientIP) {</span> |
| <span class="source-line-no">245</span><span id="line-245"> // Extract meter name containing the client IP</span> |
| <span class="source-line-no">246</span><span id="line-246"> if (clientIP.isEmpty()) {</span> |
| <span class="source-line-no">247</span><span id="line-247"> return "";</span> |
| <span class="source-line-no">248</span><span id="line-248"> }</span> |
| <span class="source-line-no">249</span><span id="line-249"> return String.format("MetaTable_client_%s_lossy_request", clientIP);</span> |
| <span class="source-line-no">250</span><span id="line-250"> }</span> |
| <span class="source-line-no">251</span><span id="line-251"></span> |
| <span class="source-line-no">252</span><span id="line-252"> private String regionMeterName(String regionId) {</span> |
| <span class="source-line-no">253</span><span id="line-253"> // Extract meter name containing the region ID</span> |
| <span class="source-line-no">254</span><span id="line-254"> return String.format("MetaTable_region_%s_lossy_request", regionId);</span> |
| <span class="source-line-no">255</span><span id="line-255"> }</span> |
| <span class="source-line-no">256</span><span id="line-256"> }</span> |
| <span class="source-line-no">257</span><span id="line-257"></span> |
| <span class="source-line-no">258</span><span id="line-258"> @Override</span> |
| <span class="source-line-no">259</span><span id="line-259"> public Optional<RegionObserver> getRegionObserver() {</span> |
| <span class="source-line-no">260</span><span id="line-260"> return Optional.of(observer);</span> |
| <span class="source-line-no">261</span><span id="line-261"> }</span> |
| <span class="source-line-no">262</span><span id="line-262"></span> |
| <span class="source-line-no">263</span><span id="line-263"> @Override</span> |
| <span class="source-line-no">264</span><span id="line-264"> public void start(CoprocessorEnvironment env) throws IOException {</span> |
| <span class="source-line-no">265</span><span id="line-265"> observer = new ExampleRegionObserverMeta();</span> |
| <span class="source-line-no">266</span><span id="line-266"> if (</span> |
| <span class="source-line-no">267</span><span id="line-267"> env instanceof RegionCoprocessorEnvironment</span> |
| <span class="source-line-no">268</span><span id="line-268"> && ((RegionCoprocessorEnvironment) env).getRegionInfo().getTable() != null</span> |
| <span class="source-line-no">269</span><span id="line-269"> && ((RegionCoprocessorEnvironment) env).getRegionInfo().getTable()</span> |
| <span class="source-line-no">270</span><span id="line-270"> .equals(TableName.META_TABLE_NAME)</span> |
| <span class="source-line-no">271</span><span id="line-271"> ) {</span> |
| <span class="source-line-no">272</span><span id="line-272"> RegionCoprocessorEnvironment regionCoprocessorEnv = (RegionCoprocessorEnvironment) env;</span> |
| <span class="source-line-no">273</span><span id="line-273"> registry = regionCoprocessorEnv.getMetricRegistryForRegionServer();</span> |
| <span class="source-line-no">274</span><span id="line-274"> LossyCounting.LossyCountingListener<String> listener = key -> {</span> |
| <span class="source-line-no">275</span><span id="line-275"> registry.remove(key);</span> |
| <span class="source-line-no">276</span><span id="line-276"> metrics.remove(key);</span> |
| <span class="source-line-no">277</span><span id="line-277"> };</span> |
| <span class="source-line-no">278</span><span id="line-278"> final Configuration conf = regionCoprocessorEnv.getConfiguration();</span> |
| <span class="source-line-no">279</span><span id="line-279"> clientMetricsLossyCounting = new LossyCounting<>("clientMetaMetrics", conf, listener);</span> |
| <span class="source-line-no">280</span><span id="line-280"> regionMetricsLossyCounting = new LossyCounting<>("regionMetaMetrics", conf, listener);</span> |
| <span class="source-line-no">281</span><span id="line-281"> // only be active mode when this region holds meta table.</span> |
| <span class="source-line-no">282</span><span id="line-282"> active = true;</span> |
| <span class="source-line-no">283</span><span id="line-283"> }</span> |
| <span class="source-line-no">284</span><span id="line-284"> }</span> |
| <span class="source-line-no">285</span><span id="line-285"></span> |
| <span class="source-line-no">286</span><span id="line-286"> @Override</span> |
| <span class="source-line-no">287</span><span id="line-287"> public void stop(CoprocessorEnvironment env) throws IOException {</span> |
| <span class="source-line-no">288</span><span id="line-288"> // since meta region can move around, clear stale metrics when stop.</span> |
| <span class="source-line-no">289</span><span id="line-289"> for (String metric : metrics) {</span> |
| <span class="source-line-no">290</span><span id="line-290"> registry.remove(metric);</span> |
| <span class="source-line-no">291</span><span id="line-291"> }</span> |
| <span class="source-line-no">292</span><span id="line-292"> }</span> |
| <span class="source-line-no">293</span><span id="line-293">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
