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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.ipc;</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.Collection;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.util.Iterator;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.util.concurrent.BlockingQueue;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.concurrent.LinkedBlockingDeque;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.concurrent.LinkedBlockingQueue;</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 java.util.concurrent.atomic.AtomicBoolean;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.concurrent.atomic.LongAdder;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">030</span><span id="line-30"></span> |
| <span class="source-line-no">031</span><span id="line-31">/**</span> |
| <span class="source-line-no">032</span><span id="line-32"> * Adaptive LIFO blocking queue utilizing CoDel algorithm to prevent queue overloading. Implementing</span> |
| <span class="source-line-no">033</span><span id="line-33"> * {@link BlockingQueue} interface to be compatible with {@link RpcExecutor}. Currently uses</span> |
| <span class="source-line-no">034</span><span id="line-34"> * milliseconds internally, need to look into whether we should use nanoseconds for timeInterval and</span> |
| <span class="source-line-no">035</span><span id="line-35"> * minDelay.</span> |
| <span class="source-line-no">036</span><span id="line-36"> * @see <a href="http://queue.acm.org/detail.cfm?id=2839461">Fail at Scale paper</a></span> |
| <span class="source-line-no">037</span><span id="line-37"> * @see <a href="https://github.com/facebook/wangle/blob/master/wangle/concurrent/Codel.cpp"> CoDel</span> |
| <span class="source-line-no">038</span><span id="line-38"> * version for generic job queues in Wangle library</a></span> |
| <span class="source-line-no">039</span><span id="line-39"> */</span> |
| <span class="source-line-no">040</span><span id="line-40">@InterfaceAudience.Private</span> |
| <span class="source-line-no">041</span><span id="line-41">public class AdaptiveLifoCoDelCallQueue implements BlockingQueue<CallRunner> {</span> |
| <span class="source-line-no">042</span><span id="line-42"></span> |
| <span class="source-line-no">043</span><span id="line-43"> // backing queue</span> |
| <span class="source-line-no">044</span><span id="line-44"> private LinkedBlockingDeque<CallRunner> queue;</span> |
| <span class="source-line-no">045</span><span id="line-45"></span> |
| <span class="source-line-no">046</span><span id="line-46"> // so we can calculate actual threshold to switch to LIFO under load</span> |
| <span class="source-line-no">047</span><span id="line-47"> private int maxCapacity;</span> |
| <span class="source-line-no">048</span><span id="line-48"></span> |
| <span class="source-line-no">049</span><span id="line-49"> // metrics (shared across all queues)</span> |
| <span class="source-line-no">050</span><span id="line-50"> private LongAdder numGeneralCallsDropped;</span> |
| <span class="source-line-no">051</span><span id="line-51"> private LongAdder numLifoModeSwitches;</span> |
| <span class="source-line-no">052</span><span id="line-52"></span> |
| <span class="source-line-no">053</span><span id="line-53"> // Both are in milliseconds</span> |
| <span class="source-line-no">054</span><span id="line-54"> private volatile int codelTargetDelay;</span> |
| <span class="source-line-no">055</span><span id="line-55"> private volatile int codelInterval;</span> |
| <span class="source-line-no">056</span><span id="line-56"></span> |
| <span class="source-line-no">057</span><span id="line-57"> // if queue if full more than that percent, we switch to LIFO mode.</span> |
| <span class="source-line-no">058</span><span id="line-58"> // Values are in the range of 0.7, 0.8 etc (0-1.0).</span> |
| <span class="source-line-no">059</span><span id="line-59"> private volatile double lifoThreshold;</span> |
| <span class="source-line-no">060</span><span id="line-60"></span> |
| <span class="source-line-no">061</span><span id="line-61"> // minimal delay observed during the interval</span> |
| <span class="source-line-no">062</span><span id="line-62"> private volatile long minDelay;</span> |
| <span class="source-line-no">063</span><span id="line-63"></span> |
| <span class="source-line-no">064</span><span id="line-64"> // the moment when current interval ends</span> |
| <span class="source-line-no">065</span><span id="line-65"> private volatile long intervalTime = EnvironmentEdgeManager.currentTime();</span> |
| <span class="source-line-no">066</span><span id="line-66"></span> |
| <span class="source-line-no">067</span><span id="line-67"> // switch to ensure only one threads does interval cutoffs</span> |
| <span class="source-line-no">068</span><span id="line-68"> private AtomicBoolean resetDelay = new AtomicBoolean(true);</span> |
| <span class="source-line-no">069</span><span id="line-69"></span> |
| <span class="source-line-no">070</span><span id="line-70"> // if we're in this mode, "long" calls are getting dropped</span> |
| <span class="source-line-no">071</span><span id="line-71"> private AtomicBoolean isOverloaded = new AtomicBoolean(false);</span> |
| <span class="source-line-no">072</span><span id="line-72"></span> |
| <span class="source-line-no">073</span><span id="line-73"> public AdaptiveLifoCoDelCallQueue(int capacity, int targetDelay, int interval,</span> |
| <span class="source-line-no">074</span><span id="line-74"> double lifoThreshold, LongAdder numGeneralCallsDropped, LongAdder numLifoModeSwitches) {</span> |
| <span class="source-line-no">075</span><span id="line-75"> this.maxCapacity = capacity;</span> |
| <span class="source-line-no">076</span><span id="line-76"> this.queue = new LinkedBlockingDeque<>(capacity);</span> |
| <span class="source-line-no">077</span><span id="line-77"> this.codelTargetDelay = targetDelay;</span> |
| <span class="source-line-no">078</span><span id="line-78"> this.codelInterval = interval;</span> |
| <span class="source-line-no">079</span><span id="line-79"> this.lifoThreshold = lifoThreshold;</span> |
| <span class="source-line-no">080</span><span id="line-80"> this.numGeneralCallsDropped = numGeneralCallsDropped;</span> |
| <span class="source-line-no">081</span><span id="line-81"> this.numLifoModeSwitches = numLifoModeSwitches;</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"> /**</span> |
| <span class="source-line-no">085</span><span id="line-85"> * Update tunables.</span> |
| <span class="source-line-no">086</span><span id="line-86"> * @param newCodelTargetDelay new CoDel target delay</span> |
| <span class="source-line-no">087</span><span id="line-87"> * @param newCodelInterval new CoDel interval</span> |
| <span class="source-line-no">088</span><span id="line-88"> * @param newLifoThreshold new Adaptive Lifo threshold</span> |
| <span class="source-line-no">089</span><span id="line-89"> */</span> |
| <span class="source-line-no">090</span><span id="line-90"> public void updateTunables(int newCodelTargetDelay, int newCodelInterval,</span> |
| <span class="source-line-no">091</span><span id="line-91"> double newLifoThreshold) {</span> |
| <span class="source-line-no">092</span><span id="line-92"> this.codelTargetDelay = newCodelTargetDelay;</span> |
| <span class="source-line-no">093</span><span id="line-93"> this.codelInterval = newCodelInterval;</span> |
| <span class="source-line-no">094</span><span id="line-94"> this.lifoThreshold = newLifoThreshold;</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"> /**</span> |
| <span class="source-line-no">098</span><span id="line-98"> * Behaves as {@link LinkedBlockingQueue#take()}, except it will silently skip all calls which it</span> |
| <span class="source-line-no">099</span><span id="line-99"> * thinks should be dropped.</span> |
| <span class="source-line-no">100</span><span id="line-100"> * @return the head of this queue</span> |
| <span class="source-line-no">101</span><span id="line-101"> * @throws InterruptedException if interrupted while waiting</span> |
| <span class="source-line-no">102</span><span id="line-102"> */</span> |
| <span class="source-line-no">103</span><span id="line-103"> @Override</span> |
| <span class="source-line-no">104</span><span id="line-104"> public CallRunner take() throws InterruptedException {</span> |
| <span class="source-line-no">105</span><span id="line-105"> CallRunner cr;</span> |
| <span class="source-line-no">106</span><span id="line-106"> while (true) {</span> |
| <span class="source-line-no">107</span><span id="line-107"> if (((double) queue.size() / this.maxCapacity) > lifoThreshold) {</span> |
| <span class="source-line-no">108</span><span id="line-108"> numLifoModeSwitches.increment();</span> |
| <span class="source-line-no">109</span><span id="line-109"> cr = queue.takeLast();</span> |
| <span class="source-line-no">110</span><span id="line-110"> } else {</span> |
| <span class="source-line-no">111</span><span id="line-111"> cr = queue.takeFirst();</span> |
| <span class="source-line-no">112</span><span id="line-112"> }</span> |
| <span class="source-line-no">113</span><span id="line-113"> if (needToDrop(cr)) {</span> |
| <span class="source-line-no">114</span><span id="line-114"> numGeneralCallsDropped.increment();</span> |
| <span class="source-line-no">115</span><span id="line-115"> cr.drop();</span> |
| <span class="source-line-no">116</span><span id="line-116"> } else {</span> |
| <span class="source-line-no">117</span><span id="line-117"> return cr;</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"> }</span> |
| <span class="source-line-no">121</span><span id="line-121"></span> |
| <span class="source-line-no">122</span><span id="line-122"> @Override</span> |
| <span class="source-line-no">123</span><span id="line-123"> public CallRunner poll() {</span> |
| <span class="source-line-no">124</span><span id="line-124"> CallRunner cr;</span> |
| <span class="source-line-no">125</span><span id="line-125"> boolean switched = false;</span> |
| <span class="source-line-no">126</span><span id="line-126"> while (true) {</span> |
| <span class="source-line-no">127</span><span id="line-127"> if (((double) queue.size() / this.maxCapacity) > lifoThreshold) {</span> |
| <span class="source-line-no">128</span><span id="line-128"> // Only count once per switch.</span> |
| <span class="source-line-no">129</span><span id="line-129"> if (!switched) {</span> |
| <span class="source-line-no">130</span><span id="line-130"> switched = true;</span> |
| <span class="source-line-no">131</span><span id="line-131"> numLifoModeSwitches.increment();</span> |
| <span class="source-line-no">132</span><span id="line-132"> }</span> |
| <span class="source-line-no">133</span><span id="line-133"> cr = queue.pollLast();</span> |
| <span class="source-line-no">134</span><span id="line-134"> } else {</span> |
| <span class="source-line-no">135</span><span id="line-135"> switched = false;</span> |
| <span class="source-line-no">136</span><span id="line-136"> cr = queue.pollFirst();</span> |
| <span class="source-line-no">137</span><span id="line-137"> }</span> |
| <span class="source-line-no">138</span><span id="line-138"> if (cr == null) {</span> |
| <span class="source-line-no">139</span><span id="line-139"> return cr;</span> |
| <span class="source-line-no">140</span><span id="line-140"> }</span> |
| <span class="source-line-no">141</span><span id="line-141"> if (needToDrop(cr)) {</span> |
| <span class="source-line-no">142</span><span id="line-142"> numGeneralCallsDropped.increment();</span> |
| <span class="source-line-no">143</span><span id="line-143"> cr.drop();</span> |
| <span class="source-line-no">144</span><span id="line-144"> } else {</span> |
| <span class="source-line-no">145</span><span id="line-145"> return cr;</span> |
| <span class="source-line-no">146</span><span id="line-146"> }</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"></span> |
| <span class="source-line-no">150</span><span id="line-150"> /**</span> |
| <span class="source-line-no">151</span><span id="line-151"> * @param callRunner to validate</span> |
| <span class="source-line-no">152</span><span id="line-152"> * @return true if this call needs to be skipped based on call timestamp and internal queue state</span> |
| <span class="source-line-no">153</span><span id="line-153"> * (deemed overloaded).</span> |
| <span class="source-line-no">154</span><span id="line-154"> */</span> |
| <span class="source-line-no">155</span><span id="line-155"> private boolean needToDrop(CallRunner callRunner) {</span> |
| <span class="source-line-no">156</span><span id="line-156"> long now = EnvironmentEdgeManager.currentTime();</span> |
| <span class="source-line-no">157</span><span id="line-157"> long callDelay = now - callRunner.getRpcCall().getReceiveTime();</span> |
| <span class="source-line-no">158</span><span id="line-158"></span> |
| <span class="source-line-no">159</span><span id="line-159"> long localMinDelay = this.minDelay;</span> |
| <span class="source-line-no">160</span><span id="line-160"></span> |
| <span class="source-line-no">161</span><span id="line-161"> // Try and determine if we should reset</span> |
| <span class="source-line-no">162</span><span id="line-162"> // the delay time and determine overload</span> |
| <span class="source-line-no">163</span><span id="line-163"> if (now > intervalTime && !resetDelay.get() && !resetDelay.getAndSet(true)) {</span> |
| <span class="source-line-no">164</span><span id="line-164"> intervalTime = now + codelInterval;</span> |
| <span class="source-line-no">165</span><span id="line-165"></span> |
| <span class="source-line-no">166</span><span id="line-166"> isOverloaded.set(localMinDelay > codelTargetDelay);</span> |
| <span class="source-line-no">167</span><span id="line-167"> }</span> |
| <span class="source-line-no">168</span><span id="line-168"></span> |
| <span class="source-line-no">169</span><span id="line-169"> // If it looks like we should reset the delay</span> |
| <span class="source-line-no">170</span><span id="line-170"> // time do it only once on one thread</span> |
| <span class="source-line-no">171</span><span id="line-171"> if (resetDelay.get() && resetDelay.getAndSet(false)) {</span> |
| <span class="source-line-no">172</span><span id="line-172"> minDelay = callDelay;</span> |
| <span class="source-line-no">173</span><span id="line-173"> // we just reset the delay dunno about how this will work</span> |
| <span class="source-line-no">174</span><span id="line-174"> return false;</span> |
| <span class="source-line-no">175</span><span id="line-175"> } else if (callDelay < localMinDelay) {</span> |
| <span class="source-line-no">176</span><span id="line-176"> minDelay = callDelay;</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"> return isOverloaded.get() && callDelay > 2 * codelTargetDelay;</span> |
| <span class="source-line-no">180</span><span id="line-180"> }</span> |
| <span class="source-line-no">181</span><span id="line-181"></span> |
| <span class="source-line-no">182</span><span id="line-182"> // Generic BlockingQueue methods we support</span> |
| <span class="source-line-no">183</span><span id="line-183"> @Override</span> |
| <span class="source-line-no">184</span><span id="line-184"> public boolean offer(CallRunner callRunner) {</span> |
| <span class="source-line-no">185</span><span id="line-185"> return queue.offer(callRunner);</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"> @Override</span> |
| <span class="source-line-no">189</span><span id="line-189"> public int size() {</span> |
| <span class="source-line-no">190</span><span id="line-190"> return queue.size();</span> |
| <span class="source-line-no">191</span><span id="line-191"> }</span> |
| <span class="source-line-no">192</span><span id="line-192"></span> |
| <span class="source-line-no">193</span><span id="line-193"> @Override</span> |
| <span class="source-line-no">194</span><span id="line-194"> public String toString() {</span> |
| <span class="source-line-no">195</span><span id="line-195"> return queue.toString();</span> |
| <span class="source-line-no">196</span><span id="line-196"> }</span> |
| <span class="source-line-no">197</span><span id="line-197"></span> |
| <span class="source-line-no">198</span><span id="line-198"> // This class does NOT provide generic purpose BlockingQueue implementation,</span> |
| <span class="source-line-no">199</span><span id="line-199"> // so to prevent misuse all other methods throw UnsupportedOperationException.</span> |
| <span class="source-line-no">200</span><span id="line-200"></span> |
| <span class="source-line-no">201</span><span id="line-201"> @Override</span> |
| <span class="source-line-no">202</span><span id="line-202"> public CallRunner poll(long timeout, TimeUnit unit) throws InterruptedException {</span> |
| <span class="source-line-no">203</span><span id="line-203"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">204</span><span id="line-204"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">205</span><span id="line-205"> }</span> |
| <span class="source-line-no">206</span><span id="line-206"></span> |
| <span class="source-line-no">207</span><span id="line-207"> @Override</span> |
| <span class="source-line-no">208</span><span id="line-208"> public CallRunner peek() {</span> |
| <span class="source-line-no">209</span><span id="line-209"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">210</span><span id="line-210"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">211</span><span id="line-211"> }</span> |
| <span class="source-line-no">212</span><span id="line-212"></span> |
| <span class="source-line-no">213</span><span id="line-213"> @Override</span> |
| <span class="source-line-no">214</span><span id="line-214"> public boolean remove(Object o) {</span> |
| <span class="source-line-no">215</span><span id="line-215"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">216</span><span id="line-216"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">217</span><span id="line-217"> }</span> |
| <span class="source-line-no">218</span><span id="line-218"></span> |
| <span class="source-line-no">219</span><span id="line-219"> @Override</span> |
| <span class="source-line-no">220</span><span id="line-220"> public boolean contains(Object o) {</span> |
| <span class="source-line-no">221</span><span id="line-221"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">222</span><span id="line-222"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">223</span><span id="line-223"> }</span> |
| <span class="source-line-no">224</span><span id="line-224"></span> |
| <span class="source-line-no">225</span><span id="line-225"> @Override</span> |
| <span class="source-line-no">226</span><span id="line-226"> public Object[] toArray() {</span> |
| <span class="source-line-no">227</span><span id="line-227"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">228</span><span id="line-228"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">229</span><span id="line-229"> }</span> |
| <span class="source-line-no">230</span><span id="line-230"></span> |
| <span class="source-line-no">231</span><span id="line-231"> @Override</span> |
| <span class="source-line-no">232</span><span id="line-232"> public <T> T[] toArray(T[] a) {</span> |
| <span class="source-line-no">233</span><span id="line-233"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">234</span><span id="line-234"> "This class doesn't support anything," + " but take() and offer() methods");</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 void clear() {</span> |
| <span class="source-line-no">239</span><span id="line-239"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">240</span><span id="line-240"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">241</span><span id="line-241"> }</span> |
| <span class="source-line-no">242</span><span id="line-242"></span> |
| <span class="source-line-no">243</span><span id="line-243"> @Override</span> |
| <span class="source-line-no">244</span><span id="line-244"> public int drainTo(Collection<? super CallRunner> c) {</span> |
| <span class="source-line-no">245</span><span id="line-245"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">246</span><span id="line-246"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">247</span><span id="line-247"> }</span> |
| <span class="source-line-no">248</span><span id="line-248"></span> |
| <span class="source-line-no">249</span><span id="line-249"> @Override</span> |
| <span class="source-line-no">250</span><span id="line-250"> public int drainTo(Collection<? super CallRunner> c, int maxElements) {</span> |
| <span class="source-line-no">251</span><span id="line-251"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">252</span><span id="line-252"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">253</span><span id="line-253"> }</span> |
| <span class="source-line-no">254</span><span id="line-254"></span> |
| <span class="source-line-no">255</span><span id="line-255"> @Override</span> |
| <span class="source-line-no">256</span><span id="line-256"> public Iterator<CallRunner> iterator() {</span> |
| <span class="source-line-no">257</span><span id="line-257"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">258</span><span id="line-258"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">259</span><span id="line-259"> }</span> |
| <span class="source-line-no">260</span><span id="line-260"></span> |
| <span class="source-line-no">261</span><span id="line-261"> @Override</span> |
| <span class="source-line-no">262</span><span id="line-262"> public boolean add(CallRunner callRunner) {</span> |
| <span class="source-line-no">263</span><span id="line-263"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">264</span><span id="line-264"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">265</span><span id="line-265"> }</span> |
| <span class="source-line-no">266</span><span id="line-266"></span> |
| <span class="source-line-no">267</span><span id="line-267"> @Override</span> |
| <span class="source-line-no">268</span><span id="line-268"> public CallRunner remove() {</span> |
| <span class="source-line-no">269</span><span id="line-269"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">270</span><span id="line-270"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">271</span><span id="line-271"> }</span> |
| <span class="source-line-no">272</span><span id="line-272"></span> |
| <span class="source-line-no">273</span><span id="line-273"> @Override</span> |
| <span class="source-line-no">274</span><span id="line-274"> public CallRunner element() {</span> |
| <span class="source-line-no">275</span><span id="line-275"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">276</span><span id="line-276"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">277</span><span id="line-277"> }</span> |
| <span class="source-line-no">278</span><span id="line-278"></span> |
| <span class="source-line-no">279</span><span id="line-279"> @Override</span> |
| <span class="source-line-no">280</span><span id="line-280"> public boolean addAll(Collection<? extends CallRunner> c) {</span> |
| <span class="source-line-no">281</span><span id="line-281"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">282</span><span id="line-282"> "This class doesn't support anything," + " but take() and offer() methods");</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"> @Override</span> |
| <span class="source-line-no">286</span><span id="line-286"> public boolean isEmpty() {</span> |
| <span class="source-line-no">287</span><span id="line-287"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">288</span><span id="line-288"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">289</span><span id="line-289"> }</span> |
| <span class="source-line-no">290</span><span id="line-290"></span> |
| <span class="source-line-no">291</span><span id="line-291"> @Override</span> |
| <span class="source-line-no">292</span><span id="line-292"> public boolean containsAll(Collection<?> c) {</span> |
| <span class="source-line-no">293</span><span id="line-293"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">294</span><span id="line-294"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">295</span><span id="line-295"> }</span> |
| <span class="source-line-no">296</span><span id="line-296"></span> |
| <span class="source-line-no">297</span><span id="line-297"> @Override</span> |
| <span class="source-line-no">298</span><span id="line-298"> public boolean removeAll(Collection<?> c) {</span> |
| <span class="source-line-no">299</span><span id="line-299"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">300</span><span id="line-300"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">301</span><span id="line-301"> }</span> |
| <span class="source-line-no">302</span><span id="line-302"></span> |
| <span class="source-line-no">303</span><span id="line-303"> @Override</span> |
| <span class="source-line-no">304</span><span id="line-304"> public boolean retainAll(Collection<?> c) {</span> |
| <span class="source-line-no">305</span><span id="line-305"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">306</span><span id="line-306"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">307</span><span id="line-307"> }</span> |
| <span class="source-line-no">308</span><span id="line-308"></span> |
| <span class="source-line-no">309</span><span id="line-309"> @Override</span> |
| <span class="source-line-no">310</span><span id="line-310"> public int remainingCapacity() {</span> |
| <span class="source-line-no">311</span><span id="line-311"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">312</span><span id="line-312"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">313</span><span id="line-313"> }</span> |
| <span class="source-line-no">314</span><span id="line-314"></span> |
| <span class="source-line-no">315</span><span id="line-315"> @Override</span> |
| <span class="source-line-no">316</span><span id="line-316"> public void put(CallRunner callRunner) throws InterruptedException {</span> |
| <span class="source-line-no">317</span><span id="line-317"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">318</span><span id="line-318"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">319</span><span id="line-319"> }</span> |
| <span class="source-line-no">320</span><span id="line-320"></span> |
| <span class="source-line-no">321</span><span id="line-321"> @Override</span> |
| <span class="source-line-no">322</span><span id="line-322"> public boolean offer(CallRunner callRunner, long timeout, TimeUnit unit)</span> |
| <span class="source-line-no">323</span><span id="line-323"> throws InterruptedException {</span> |
| <span class="source-line-no">324</span><span id="line-324"> throw new UnsupportedOperationException(</span> |
| <span class="source-line-no">325</span><span id="line-325"> "This class doesn't support anything," + " but take() and offer() methods");</span> |
| <span class="source-line-no">326</span><span id="line-326"> }</span> |
| <span class="source-line-no">327</span><span id="line-327">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |