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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.thrift;</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.util.ArrayList;</span>
<span class="source-line-no">021</span><span id="line-21">import java.util.Collection;</span>
<span class="source-line-no">022</span><span id="line-22">import java.util.Iterator;</span>
<span class="source-line-no">023</span><span id="line-23">import java.util.List;</span>
<span class="source-line-no">024</span><span id="line-24">import java.util.concurrent.BlockingQueue;</span>
<span class="source-line-no">025</span><span id="line-25">import java.util.concurrent.TimeUnit;</span>
<span class="source-line-no">026</span><span id="line-26">import org.apache.yetus.audience.InterfaceAudience;</span>
<span class="source-line-no">027</span><span id="line-27">import org.slf4j.Logger;</span>
<span class="source-line-no">028</span><span id="line-28">import org.slf4j.LoggerFactory;</span>
<span class="source-line-no">029</span><span id="line-29"></span>
<span class="source-line-no">030</span><span id="line-30">/**</span>
<span class="source-line-no">031</span><span id="line-31"> * A BlockingQueue reports waiting time in queue and queue length to ThriftMetrics.</span>
<span class="source-line-no">032</span><span id="line-32"> */</span>
<span class="source-line-no">033</span><span id="line-33">@InterfaceAudience.Private</span>
<span class="source-line-no">034</span><span id="line-34">public class CallQueue implements BlockingQueue&lt;Runnable&gt; {</span>
<span class="source-line-no">035</span><span id="line-35"> private static final Logger LOG = LoggerFactory.getLogger(CallQueue.class);</span>
<span class="source-line-no">036</span><span id="line-36"></span>
<span class="source-line-no">037</span><span id="line-37"> private final BlockingQueue&lt;Call&gt; underlyingQueue;</span>
<span class="source-line-no">038</span><span id="line-38"> private final ThriftMetrics metrics;</span>
<span class="source-line-no">039</span><span id="line-39"></span>
<span class="source-line-no">040</span><span id="line-40"> public CallQueue(BlockingQueue&lt;Call&gt; underlyingQueue, ThriftMetrics metrics) {</span>
<span class="source-line-no">041</span><span id="line-41"> this.underlyingQueue = underlyingQueue;</span>
<span class="source-line-no">042</span><span id="line-42"> this.metrics = metrics;</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"> private static long now() {</span>
<span class="source-line-no">046</span><span id="line-46"> return System.nanoTime();</span>
<span class="source-line-no">047</span><span id="line-47"> }</span>
<span class="source-line-no">048</span><span id="line-48"></span>
<span class="source-line-no">049</span><span id="line-49"> public static class Call implements Runnable {</span>
<span class="source-line-no">050</span><span id="line-50"> final long startTime;</span>
<span class="source-line-no">051</span><span id="line-51"> final Runnable underlyingRunnable;</span>
<span class="source-line-no">052</span><span id="line-52"></span>
<span class="source-line-no">053</span><span id="line-53"> Call(Runnable underlyingRunnable) {</span>
<span class="source-line-no">054</span><span id="line-54"> this.underlyingRunnable = underlyingRunnable;</span>
<span class="source-line-no">055</span><span id="line-55"> this.startTime = now();</span>
<span class="source-line-no">056</span><span id="line-56"> }</span>
<span class="source-line-no">057</span><span id="line-57"></span>
<span class="source-line-no">058</span><span id="line-58"> @Override</span>
<span class="source-line-no">059</span><span id="line-59"> public void run() {</span>
<span class="source-line-no">060</span><span id="line-60"> underlyingRunnable.run();</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"> public long timeInQueue() {</span>
<span class="source-line-no">064</span><span id="line-64"> return now() - startTime;</span>
<span class="source-line-no">065</span><span id="line-65"> }</span>
<span class="source-line-no">066</span><span id="line-66"></span>
<span class="source-line-no">067</span><span id="line-67"> @Override</span>
<span class="source-line-no">068</span><span id="line-68"> public boolean equals(Object other) {</span>
<span class="source-line-no">069</span><span id="line-69"> if (other instanceof Call) {</span>
<span class="source-line-no">070</span><span id="line-70"> Call otherCall = (Call) (other);</span>
<span class="source-line-no">071</span><span id="line-71"> return this.underlyingRunnable.equals(otherCall.underlyingRunnable);</span>
<span class="source-line-no">072</span><span id="line-72"> } else if (other instanceof Runnable) {</span>
<span class="source-line-no">073</span><span id="line-73"> return this.underlyingRunnable.equals(other);</span>
<span class="source-line-no">074</span><span id="line-74"> }</span>
<span class="source-line-no">075</span><span id="line-75"> return false;</span>
<span class="source-line-no">076</span><span id="line-76"> }</span>
<span class="source-line-no">077</span><span id="line-77"></span>
<span class="source-line-no">078</span><span id="line-78"> @Override</span>
<span class="source-line-no">079</span><span id="line-79"> public int hashCode() {</span>
<span class="source-line-no">080</span><span id="line-80"> return this.underlyingRunnable.hashCode();</span>
<span class="source-line-no">081</span><span id="line-81"> }</span>
<span class="source-line-no">082</span><span id="line-82"> }</span>
<span class="source-line-no">083</span><span id="line-83"></span>
<span class="source-line-no">084</span><span id="line-84"> @Override</span>
<span class="source-line-no">085</span><span id="line-85"> public Runnable poll() {</span>
<span class="source-line-no">086</span><span id="line-86"> Call result = underlyingQueue.poll();</span>
<span class="source-line-no">087</span><span id="line-87"> updateMetrics(result);</span>
<span class="source-line-no">088</span><span id="line-88"> return result;</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"> private void updateMetrics(Call result) {</span>
<span class="source-line-no">092</span><span id="line-92"> if (result == null) {</span>
<span class="source-line-no">093</span><span id="line-93"> return;</span>
<span class="source-line-no">094</span><span id="line-94"> }</span>
<span class="source-line-no">095</span><span id="line-95"> metrics.incTimeInQueue(result.timeInQueue());</span>
<span class="source-line-no">096</span><span id="line-96"> metrics.setCallQueueLen(this.size());</span>
<span class="source-line-no">097</span><span id="line-97"> }</span>
<span class="source-line-no">098</span><span id="line-98"></span>
<span class="source-line-no">099</span><span id="line-99"> @Override</span>
<span class="source-line-no">100</span><span id="line-100"> public Runnable poll(long timeout, TimeUnit unit) throws InterruptedException {</span>
<span class="source-line-no">101</span><span id="line-101"> Call result = underlyingQueue.poll(timeout, unit);</span>
<span class="source-line-no">102</span><span id="line-102"> updateMetrics(result);</span>
<span class="source-line-no">103</span><span id="line-103"> return result;</span>
<span class="source-line-no">104</span><span id="line-104"> }</span>
<span class="source-line-no">105</span><span id="line-105"></span>
<span class="source-line-no">106</span><span id="line-106"> @Override</span>
<span class="source-line-no">107</span><span id="line-107"> public Runnable remove() {</span>
<span class="source-line-no">108</span><span id="line-108"> Call result = underlyingQueue.remove();</span>
<span class="source-line-no">109</span><span id="line-109"> updateMetrics(result);</span>
<span class="source-line-no">110</span><span id="line-110"> return result;</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 Runnable take() throws InterruptedException {</span>
<span class="source-line-no">115</span><span id="line-115"> Call result = underlyingQueue.take();</span>
<span class="source-line-no">116</span><span id="line-116"> updateMetrics(result);</span>
<span class="source-line-no">117</span><span id="line-117"> return result;</span>
<span class="source-line-no">118</span><span id="line-118"> }</span>
<span class="source-line-no">119</span><span id="line-119"></span>
<span class="source-line-no">120</span><span id="line-120"> @Override</span>
<span class="source-line-no">121</span><span id="line-121"> public int drainTo(Collection&lt;? super Runnable&gt; destination) {</span>
<span class="source-line-no">122</span><span id="line-122"> return drainTo(destination, Integer.MAX_VALUE);</span>
<span class="source-line-no">123</span><span id="line-123"> }</span>
<span class="source-line-no">124</span><span id="line-124"></span>
<span class="source-line-no">125</span><span id="line-125"> @Override</span>
<span class="source-line-no">126</span><span id="line-126"> public int drainTo(Collection&lt;? super Runnable&gt; destination, int maxElements) {</span>
<span class="source-line-no">127</span><span id="line-127"> if (destination == this) {</span>
<span class="source-line-no">128</span><span id="line-128"> throw new IllegalArgumentException("A BlockingQueue cannot drain to itself.");</span>
<span class="source-line-no">129</span><span id="line-129"> }</span>
<span class="source-line-no">130</span><span id="line-130"> List&lt;Call&gt; drained = new ArrayList&lt;&gt;();</span>
<span class="source-line-no">131</span><span id="line-131"> underlyingQueue.drainTo(drained, maxElements);</span>
<span class="source-line-no">132</span><span id="line-132"> for (Call r : drained) {</span>
<span class="source-line-no">133</span><span id="line-133"> updateMetrics(r);</span>
<span class="source-line-no">134</span><span id="line-134"> }</span>
<span class="source-line-no">135</span><span id="line-135"> destination.addAll(drained);</span>
<span class="source-line-no">136</span><span id="line-136"> int sz = drained.size();</span>
<span class="source-line-no">137</span><span id="line-137"> LOG.info("Elements drained: " + sz);</span>
<span class="source-line-no">138</span><span id="line-138"> return sz;</span>
<span class="source-line-no">139</span><span id="line-139"> }</span>
<span class="source-line-no">140</span><span id="line-140"></span>
<span class="source-line-no">141</span><span id="line-141"> @Override</span>
<span class="source-line-no">142</span><span id="line-142"> public boolean offer(Runnable element) {</span>
<span class="source-line-no">143</span><span id="line-143"> return underlyingQueue.offer(new Call(element));</span>
<span class="source-line-no">144</span><span id="line-144"> }</span>
<span class="source-line-no">145</span><span id="line-145"></span>
<span class="source-line-no">146</span><span id="line-146"> @Override</span>
<span class="source-line-no">147</span><span id="line-147"> public boolean offer(Runnable element, long timeout, TimeUnit unit) throws InterruptedException {</span>
<span class="source-line-no">148</span><span id="line-148"> return underlyingQueue.offer(new Call(element), timeout, unit);</span>
<span class="source-line-no">149</span><span id="line-149"> }</span>
<span class="source-line-no">150</span><span id="line-150"></span>
<span class="source-line-no">151</span><span id="line-151"> @Override</span>
<span class="source-line-no">152</span><span id="line-152"> public void put(Runnable element) throws InterruptedException {</span>
<span class="source-line-no">153</span><span id="line-153"> underlyingQueue.put(new Call(element));</span>
<span class="source-line-no">154</span><span id="line-154"> }</span>
<span class="source-line-no">155</span><span id="line-155"></span>
<span class="source-line-no">156</span><span id="line-156"> @Override</span>
<span class="source-line-no">157</span><span id="line-157"> public boolean add(Runnable element) {</span>
<span class="source-line-no">158</span><span id="line-158"> return underlyingQueue.add(new Call(element));</span>
<span class="source-line-no">159</span><span id="line-159"> }</span>
<span class="source-line-no">160</span><span id="line-160"></span>
<span class="source-line-no">161</span><span id="line-161"> @Override</span>
<span class="source-line-no">162</span><span id="line-162"> public boolean addAll(Collection&lt;? extends Runnable&gt; elements) {</span>
<span class="source-line-no">163</span><span id="line-163"> int added = 0;</span>
<span class="source-line-no">164</span><span id="line-164"> for (Runnable r : elements) {</span>
<span class="source-line-no">165</span><span id="line-165"> added += underlyingQueue.add(new Call(r)) ? 1 : 0;</span>
<span class="source-line-no">166</span><span id="line-166"> }</span>
<span class="source-line-no">167</span><span id="line-167"> return added != 0;</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"> @Override</span>
<span class="source-line-no">171</span><span id="line-171"> public Runnable element() {</span>
<span class="source-line-no">172</span><span id="line-172"> return underlyingQueue.element();</span>
<span class="source-line-no">173</span><span id="line-173"> }</span>
<span class="source-line-no">174</span><span id="line-174"></span>
<span class="source-line-no">175</span><span id="line-175"> @Override</span>
<span class="source-line-no">176</span><span id="line-176"> public Runnable peek() {</span>
<span class="source-line-no">177</span><span id="line-177"> return underlyingQueue.peek();</span>
<span class="source-line-no">178</span><span id="line-178"> }</span>
<span class="source-line-no">179</span><span id="line-179"></span>
<span class="source-line-no">180</span><span id="line-180"> @Override</span>
<span class="source-line-no">181</span><span id="line-181"> public void clear() {</span>
<span class="source-line-no">182</span><span id="line-182"> underlyingQueue.clear();</span>
<span class="source-line-no">183</span><span id="line-183"> }</span>
<span class="source-line-no">184</span><span id="line-184"></span>
<span class="source-line-no">185</span><span id="line-185"> @Override</span>
<span class="source-line-no">186</span><span id="line-186"> public boolean containsAll(Collection&lt;?&gt; elements) {</span>
<span class="source-line-no">187</span><span id="line-187"> return underlyingQueue.containsAll(elements);</span>
<span class="source-line-no">188</span><span id="line-188"> }</span>
<span class="source-line-no">189</span><span id="line-189"></span>
<span class="source-line-no">190</span><span id="line-190"> @Override</span>
<span class="source-line-no">191</span><span id="line-191"> public boolean isEmpty() {</span>
<span class="source-line-no">192</span><span id="line-192"> return underlyingQueue.isEmpty();</span>
<span class="source-line-no">193</span><span id="line-193"> }</span>
<span class="source-line-no">194</span><span id="line-194"></span>
<span class="source-line-no">195</span><span id="line-195"> @Override</span>
<span class="source-line-no">196</span><span id="line-196"> public Iterator&lt;Runnable&gt; iterator() {</span>
<span class="source-line-no">197</span><span id="line-197"> return new Iterator&lt;Runnable&gt;() {</span>
<span class="source-line-no">198</span><span id="line-198"> final Iterator&lt;Call&gt; underlyingIterator = underlyingQueue.iterator();</span>
<span class="source-line-no">199</span><span id="line-199"></span>
<span class="source-line-no">200</span><span id="line-200"> @Override</span>
<span class="source-line-no">201</span><span id="line-201"> public Runnable next() {</span>
<span class="source-line-no">202</span><span id="line-202"> return underlyingIterator.next();</span>
<span class="source-line-no">203</span><span id="line-203"> }</span>
<span class="source-line-no">204</span><span id="line-204"></span>
<span class="source-line-no">205</span><span id="line-205"> @Override</span>
<span class="source-line-no">206</span><span id="line-206"> public boolean hasNext() {</span>
<span class="source-line-no">207</span><span id="line-207"> return underlyingIterator.hasNext();</span>
<span class="source-line-no">208</span><span id="line-208"> }</span>
<span class="source-line-no">209</span><span id="line-209"></span>
<span class="source-line-no">210</span><span id="line-210"> @Override</span>
<span class="source-line-no">211</span><span id="line-211"> public void remove() {</span>
<span class="source-line-no">212</span><span id="line-212"> underlyingIterator.remove();</span>
<span class="source-line-no">213</span><span id="line-213"> }</span>
<span class="source-line-no">214</span><span id="line-214"> };</span>
<span class="source-line-no">215</span><span id="line-215"> }</span>
<span class="source-line-no">216</span><span id="line-216"></span>
<span class="source-line-no">217</span><span id="line-217"> @Override</span>
<span class="source-line-no">218</span><span id="line-218"> public boolean removeAll(Collection&lt;?&gt; elements) {</span>
<span class="source-line-no">219</span><span id="line-219"> return underlyingQueue.removeAll(elements);</span>
<span class="source-line-no">220</span><span id="line-220"> }</span>
<span class="source-line-no">221</span><span id="line-221"></span>
<span class="source-line-no">222</span><span id="line-222"> @Override</span>
<span class="source-line-no">223</span><span id="line-223"> public boolean retainAll(Collection&lt;?&gt; elements) {</span>
<span class="source-line-no">224</span><span id="line-224"> return underlyingQueue.retainAll(elements);</span>
<span class="source-line-no">225</span><span id="line-225"> }</span>
<span class="source-line-no">226</span><span id="line-226"></span>
<span class="source-line-no">227</span><span id="line-227"> @Override</span>
<span class="source-line-no">228</span><span id="line-228"> public int size() {</span>
<span class="source-line-no">229</span><span id="line-229"> return underlyingQueue.size();</span>
<span class="source-line-no">230</span><span id="line-230"> }</span>
<span class="source-line-no">231</span><span id="line-231"></span>
<span class="source-line-no">232</span><span id="line-232"> @Override</span>
<span class="source-line-no">233</span><span id="line-233"> public Object[] toArray() {</span>
<span class="source-line-no">234</span><span id="line-234"> return underlyingQueue.toArray();</span>
<span class="source-line-no">235</span><span id="line-235"> }</span>
<span class="source-line-no">236</span><span id="line-236"></span>
<span class="source-line-no">237</span><span id="line-237"> @Override</span>
<span class="source-line-no">238</span><span id="line-238"> public &lt;T&gt; T[] toArray(T[] array) {</span>
<span class="source-line-no">239</span><span id="line-239"> return underlyingQueue.toArray(array);</span>
<span class="source-line-no">240</span><span id="line-240"> }</span>
<span class="source-line-no">241</span><span id="line-241"></span>
<span class="source-line-no">242</span><span id="line-242"> @Override</span>
<span class="source-line-no">243</span><span id="line-243"> public boolean contains(Object element) {</span>
<span class="source-line-no">244</span><span id="line-244"> return underlyingQueue.contains(element);</span>
<span class="source-line-no">245</span><span id="line-245"> }</span>
<span class="source-line-no">246</span><span id="line-246"></span>
<span class="source-line-no">247</span><span id="line-247"> @Override</span>
<span class="source-line-no">248</span><span id="line-248"> public int remainingCapacity() {</span>
<span class="source-line-no">249</span><span id="line-249"> return underlyingQueue.remainingCapacity();</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"> @Override</span>
<span class="source-line-no">253</span><span id="line-253"> public boolean remove(Object element) {</span>
<span class="source-line-no">254</span><span id="line-254"> return underlyingQueue.remove(element);</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>
</pre>
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