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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.client;</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 static org.apache.hadoop.hbase.util.ConcurrentMapUtils.computeIfAbsent;</span>
<span class="source-line-no">021</span><span id="line-21"></span>
<span class="source-line-no">022</span><span id="line-22">import java.util.concurrent.ConcurrentHashMap;</span>
<span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.conf.Configuration;</span>
<span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.HConstants;</span>
<span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.ServerName;</span>
<span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.client.backoff.ServerStatistics;</span>
<span class="source-line-no">027</span><span id="line-27">import org.apache.yetus.audience.InterfaceAudience;</span>
<span class="source-line-no">028</span><span id="line-28"></span>
<span class="source-line-no">029</span><span id="line-29">/**</span>
<span class="source-line-no">030</span><span id="line-30"> * Tracks the statistics for multiple regions</span>
<span class="source-line-no">031</span><span id="line-31"> */</span>
<span class="source-line-no">032</span><span id="line-32">@InterfaceAudience.Private</span>
<span class="source-line-no">033</span><span id="line-33">public class ServerStatisticTracker implements StatisticTrackable {</span>
<span class="source-line-no">034</span><span id="line-34"></span>
<span class="source-line-no">035</span><span id="line-35"> private final ConcurrentHashMap&lt;ServerName, ServerStatistics&gt; stats = new ConcurrentHashMap&lt;&gt;();</span>
<span class="source-line-no">036</span><span id="line-36"></span>
<span class="source-line-no">037</span><span id="line-37"> @Override</span>
<span class="source-line-no">038</span><span id="line-38"> public void updateRegionStats(ServerName server, byte[] region, RegionLoadStats currentStats) {</span>
<span class="source-line-no">039</span><span id="line-39"> computeIfAbsent(stats, server, ServerStatistics::new).update(region, currentStats);</span>
<span class="source-line-no">040</span><span id="line-40"> }</span>
<span class="source-line-no">041</span><span id="line-41"></span>
<span class="source-line-no">042</span><span id="line-42"> public ServerStatistics getStats(ServerName server) {</span>
<span class="source-line-no">043</span><span id="line-43"> return this.stats.get(server);</span>
<span class="source-line-no">044</span><span id="line-44"> }</span>
<span class="source-line-no">045</span><span id="line-45"></span>
<span class="source-line-no">046</span><span id="line-46"> public static ServerStatisticTracker create(Configuration conf) {</span>
<span class="source-line-no">047</span><span id="line-47"> if (</span>
<span class="source-line-no">048</span><span id="line-48"> !conf.getBoolean(HConstants.ENABLE_CLIENT_BACKPRESSURE,</span>
<span class="source-line-no">049</span><span id="line-49"> HConstants.DEFAULT_ENABLE_CLIENT_BACKPRESSURE)</span>
<span class="source-line-no">050</span><span id="line-50"> ) {</span>
<span class="source-line-no">051</span><span id="line-51"> return null;</span>
<span class="source-line-no">052</span><span id="line-52"> }</span>
<span class="source-line-no">053</span><span id="line-53"> return new ServerStatisticTracker();</span>
<span class="source-line-no">054</span><span id="line-54"> }</span>
<span class="source-line-no">055</span><span id="line-55">}</span>
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