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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.hbase.quotas;<a name="line.18"></a> |
| <span class="sourceLineNo">019</span><a name="line.19"></a> |
| <span class="sourceLineNo">020</span>import static org.junit.Assert.assertEquals;<a name="line.20"></a> |
| <span class="sourceLineNo">021</span>import static org.junit.Assert.assertFalse;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span>import static org.junit.Assert.assertNotEquals;<a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import static org.junit.Assert.assertTrue;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span><a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.concurrent.TimeUnit;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.testclassification.RegionServerTests;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.util.EnvironmentEdge;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.util.ManualEnvironmentEdge;<a name="line.31"></a> |
| <span class="sourceLineNo">032</span>import org.junit.ClassRule;<a name="line.32"></a> |
| <span class="sourceLineNo">033</span>import org.junit.Test;<a name="line.33"></a> |
| <span class="sourceLineNo">034</span>import org.junit.experimental.categories.Category;<a name="line.34"></a> |
| <span class="sourceLineNo">035</span><a name="line.35"></a> |
| <span class="sourceLineNo">036</span>/**<a name="line.36"></a> |
| <span class="sourceLineNo">037</span> * Verify the behaviour of the Rate Limiter.<a name="line.37"></a> |
| <span class="sourceLineNo">038</span> */<a name="line.38"></a> |
| <span class="sourceLineNo">039</span>@Category({ RegionServerTests.class, SmallTests.class })<a name="line.39"></a> |
| <span class="sourceLineNo">040</span>public class TestRateLimiter {<a name="line.40"></a> |
| <span class="sourceLineNo">041</span><a name="line.41"></a> |
| <span class="sourceLineNo">042</span> @ClassRule<a name="line.42"></a> |
| <span class="sourceLineNo">043</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> HBaseClassTestRule.forClass(TestRateLimiter.class);<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> @Test<a name="line.46"></a> |
| <span class="sourceLineNo">047</span> public void testWaitIntervalTimeUnitSeconds() {<a name="line.47"></a> |
| <span class="sourceLineNo">048</span> testWaitInterval(TimeUnit.SECONDS, 10, 100);<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> }<a name="line.49"></a> |
| <span class="sourceLineNo">050</span><a name="line.50"></a> |
| <span class="sourceLineNo">051</span> @Test<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> public void testWaitIntervalTimeUnitMinutes() {<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> testWaitInterval(TimeUnit.MINUTES, 10, 6000);<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> }<a name="line.54"></a> |
| <span class="sourceLineNo">055</span><a name="line.55"></a> |
| <span class="sourceLineNo">056</span> @Test<a name="line.56"></a> |
| <span class="sourceLineNo">057</span> public void testWaitIntervalTimeUnitHours() {<a name="line.57"></a> |
| <span class="sourceLineNo">058</span> testWaitInterval(TimeUnit.HOURS, 10, 360000);<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> @Test<a name="line.61"></a> |
| <span class="sourceLineNo">062</span> public void testWaitIntervalTimeUnitDays() {<a name="line.62"></a> |
| <span class="sourceLineNo">063</span> testWaitInterval(TimeUnit.DAYS, 10, 8640000);<a name="line.63"></a> |
| <span class="sourceLineNo">064</span> }<a name="line.64"></a> |
| <span class="sourceLineNo">065</span><a name="line.65"></a> |
| <span class="sourceLineNo">066</span> private void testWaitInterval(final TimeUnit timeUnit, final long limit,<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> final long expectedWaitInterval) {<a name="line.67"></a> |
| <span class="sourceLineNo">068</span> RateLimiter limiter = new AverageIntervalRateLimiter();<a name="line.68"></a> |
| <span class="sourceLineNo">069</span> limiter.set(limit, timeUnit);<a name="line.69"></a> |
| <span class="sourceLineNo">070</span><a name="line.70"></a> |
| <span class="sourceLineNo">071</span> long nowTs = 0;<a name="line.71"></a> |
| <span class="sourceLineNo">072</span> // consume all the available resources, one request at the time.<a name="line.72"></a> |
| <span class="sourceLineNo">073</span> // the wait interval should be 0<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> for (int i = 0; i < (limit - 1); ++i) {<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> assertEquals(0, limiter.getWaitIntervalMs());<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> limiter.consume();<a name="line.76"></a> |
| <span class="sourceLineNo">077</span> long waitInterval = limiter.waitInterval();<a name="line.77"></a> |
| <span class="sourceLineNo">078</span> assertEquals(0, waitInterval);<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> }<a name="line.79"></a> |
| <span class="sourceLineNo">080</span><a name="line.80"></a> |
| <span class="sourceLineNo">081</span> for (int i = 0; i < (limit * 4); ++i) {<a name="line.81"></a> |
| <span class="sourceLineNo">082</span> // There is one resource available, so we should be able to<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> // consume it without waiting.<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - nowTs);<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> assertEquals(0, limiter.getWaitIntervalMs());<a name="line.85"></a> |
| <span class="sourceLineNo">086</span> assertEquals(0, limiter.waitInterval());<a name="line.86"></a> |
| <span class="sourceLineNo">087</span> limiter.consume();<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> // No more resources are available, we should wait for at least an interval.<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> long waitInterval = limiter.waitInterval();<a name="line.89"></a> |
| <span class="sourceLineNo">090</span> assertEquals(expectedWaitInterval, waitInterval);<a name="line.90"></a> |
| <span class="sourceLineNo">091</span><a name="line.91"></a> |
| <span class="sourceLineNo">092</span> // set the nowTs to be the exact time when resources should be available again.<a name="line.92"></a> |
| <span class="sourceLineNo">093</span> nowTs = waitInterval;<a name="line.93"></a> |
| <span class="sourceLineNo">094</span><a name="line.94"></a> |
| <span class="sourceLineNo">095</span> // artificially go into the past to prove that when too early we should fail.<a name="line.95"></a> |
| <span class="sourceLineNo">096</span> long temp = nowTs + 500;<a name="line.96"></a> |
| <span class="sourceLineNo">097</span> limiter.setNextRefillTime(limiter.getNextRefillTime() + temp);<a name="line.97"></a> |
| <span class="sourceLineNo">098</span> assertNotEquals(0, limiter.getWaitIntervalMs());<a name="line.98"></a> |
| <span class="sourceLineNo">099</span> // Roll back the nextRefillTime set to continue further testing<a name="line.99"></a> |
| <span class="sourceLineNo">100</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - temp);<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> @Test<a name="line.104"></a> |
| <span class="sourceLineNo">105</span> public void testOverconsumptionAverageIntervalRefillStrategy() {<a name="line.105"></a> |
| <span class="sourceLineNo">106</span> RateLimiter limiter = new AverageIntervalRateLimiter();<a name="line.106"></a> |
| <span class="sourceLineNo">107</span> limiter.set(10, TimeUnit.SECONDS);<a name="line.107"></a> |
| <span class="sourceLineNo">108</span><a name="line.108"></a> |
| <span class="sourceLineNo">109</span> // 10 resources are available, but we need to consume 20 resources<a name="line.109"></a> |
| <span class="sourceLineNo">110</span> // Verify that we have to wait at least 1.1sec to have 1 resource available<a name="line.110"></a> |
| <span class="sourceLineNo">111</span> assertEquals(0, limiter.getWaitIntervalMs());<a name="line.111"></a> |
| <span class="sourceLineNo">112</span> limiter.consume(20);<a name="line.112"></a> |
| <span class="sourceLineNo">113</span> // We consumed twice the quota. Need to wait 1s to get back to 0, then another 100ms for the 1<a name="line.113"></a> |
| <span class="sourceLineNo">114</span> assertEquals(1100, limiter.waitInterval(1));<a name="line.114"></a> |
| <span class="sourceLineNo">115</span> // We consumed twice the quota. Need to wait 1s to get back to 0, then another 1s to get to 10<a name="line.115"></a> |
| <span class="sourceLineNo">116</span> assertEquals(2000, limiter.waitInterval(10));<a name="line.116"></a> |
| <span class="sourceLineNo">117</span><a name="line.117"></a> |
| <span class="sourceLineNo">118</span> // Verify that after 1sec we need to wait for another 0.1sec to get a resource available<a name="line.118"></a> |
| <span class="sourceLineNo">119</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 1000);<a name="line.119"></a> |
| <span class="sourceLineNo">120</span> assertNotEquals(0, limiter.getWaitIntervalMs(1));<a name="line.120"></a> |
| <span class="sourceLineNo">121</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 100);<a name="line.121"></a> |
| <span class="sourceLineNo">122</span> // We've waited the full 1.1sec, should now have 1 available<a name="line.122"></a> |
| <span class="sourceLineNo">123</span> assertEquals(0, limiter.getWaitIntervalMs(1));<a name="line.123"></a> |
| <span class="sourceLineNo">124</span> assertEquals(0, limiter.waitInterval());<a name="line.124"></a> |
| <span class="sourceLineNo">125</span> }<a name="line.125"></a> |
| <span class="sourceLineNo">126</span><a name="line.126"></a> |
| <span class="sourceLineNo">127</span> @Test<a name="line.127"></a> |
| <span class="sourceLineNo">128</span> public void testOverconsumptionFixedIntervalRefillStrategy() throws InterruptedException {<a name="line.128"></a> |
| <span class="sourceLineNo">129</span> RateLimiter limiter = new FixedIntervalRateLimiter();<a name="line.129"></a> |
| <span class="sourceLineNo">130</span> limiter.set(10, TimeUnit.SECONDS);<a name="line.130"></a> |
| <span class="sourceLineNo">131</span><a name="line.131"></a> |
| <span class="sourceLineNo">132</span> // fix the current time in order to get the precise value of interval<a name="line.132"></a> |
| <span class="sourceLineNo">133</span> EnvironmentEdge edge = new EnvironmentEdge() {<a name="line.133"></a> |
| <span class="sourceLineNo">134</span> private final long ts = EnvironmentEdgeManager.currentTime();<a name="line.134"></a> |
| <span class="sourceLineNo">135</span><a name="line.135"></a> |
| <span class="sourceLineNo">136</span> @Override<a name="line.136"></a> |
| <span class="sourceLineNo">137</span> public long currentTime() {<a name="line.137"></a> |
| <span class="sourceLineNo">138</span> return ts;<a name="line.138"></a> |
| <span class="sourceLineNo">139</span> }<a name="line.139"></a> |
| <span class="sourceLineNo">140</span> };<a name="line.140"></a> |
| <span class="sourceLineNo">141</span> EnvironmentEdgeManager.injectEdge(edge);<a name="line.141"></a> |
| <span class="sourceLineNo">142</span> assertEquals(0, limiter.getWaitIntervalMs());<a name="line.142"></a> |
| <span class="sourceLineNo">143</span> // 10 resources are available, but we need to consume 20 resources<a name="line.143"></a> |
| <span class="sourceLineNo">144</span> limiter.consume(20);<a name="line.144"></a> |
| <span class="sourceLineNo">145</span> // We over-consumed by 10. Since this is a fixed interval refill, where<a name="line.145"></a> |
| <span class="sourceLineNo">146</span> // each interval we refill the full limit amount, we need to wait 2 intervals -- first<a name="line.146"></a> |
| <span class="sourceLineNo">147</span> // interval gets us from -10 to 0, second gets us from 0 to 10, though we just want the 1.<a name="line.147"></a> |
| <span class="sourceLineNo">148</span> assertEquals(2000, limiter.waitInterval(1));<a name="line.148"></a> |
| <span class="sourceLineNo">149</span> EnvironmentEdgeManager.reset();<a name="line.149"></a> |
| <span class="sourceLineNo">150</span><a name="line.150"></a> |
| <span class="sourceLineNo">151</span> // Verify that after 1sec also no resource should be available<a name="line.151"></a> |
| <span class="sourceLineNo">152</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 1000);<a name="line.152"></a> |
| <span class="sourceLineNo">153</span> assertNotEquals(0, limiter.getWaitIntervalMs());<a name="line.153"></a> |
| <span class="sourceLineNo">154</span> // Verify that after total 2sec the 10 resource is available<a name="line.154"></a> |
| <span class="sourceLineNo">155</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 1000);<a name="line.155"></a> |
| <span class="sourceLineNo">156</span> assertEquals(0, limiter.getWaitIntervalMs());<a name="line.156"></a> |
| <span class="sourceLineNo">157</span> assertEquals(0, limiter.waitInterval());<a name="line.157"></a> |
| <span class="sourceLineNo">158</span> }<a name="line.158"></a> |
| <span class="sourceLineNo">159</span><a name="line.159"></a> |
| <span class="sourceLineNo">160</span> @Test<a name="line.160"></a> |
| <span class="sourceLineNo">161</span> public void testFixedIntervalResourceAvailability() throws Exception {<a name="line.161"></a> |
| <span class="sourceLineNo">162</span> RateLimiter limiter = new FixedIntervalRateLimiter();<a name="line.162"></a> |
| <span class="sourceLineNo">163</span> limiter.set(10, TimeUnit.SECONDS);<a name="line.163"></a> |
| <span class="sourceLineNo">164</span><a name="line.164"></a> |
| <span class="sourceLineNo">165</span> assertEquals(0, limiter.getWaitIntervalMs(10));<a name="line.165"></a> |
| <span class="sourceLineNo">166</span> limiter.consume(3);<a name="line.166"></a> |
| <span class="sourceLineNo">167</span> assertEquals(7, limiter.getAvailable());<a name="line.167"></a> |
| <span class="sourceLineNo">168</span> assertNotEquals(0, limiter.getWaitIntervalMs(10));<a name="line.168"></a> |
| <span class="sourceLineNo">169</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 1000);<a name="line.169"></a> |
| <span class="sourceLineNo">170</span> assertEquals(0, limiter.getWaitIntervalMs(10));<a name="line.170"></a> |
| <span class="sourceLineNo">171</span> assertEquals(10, limiter.getAvailable());<a name="line.171"></a> |
| <span class="sourceLineNo">172</span> }<a name="line.172"></a> |
| <span class="sourceLineNo">173</span><a name="line.173"></a> |
| <span class="sourceLineNo">174</span> @Test<a name="line.174"></a> |
| <span class="sourceLineNo">175</span> public void testLimiterBySmallerRate() throws InterruptedException {<a name="line.175"></a> |
| <span class="sourceLineNo">176</span> // set limiter is 10 resources per seconds<a name="line.176"></a> |
| <span class="sourceLineNo">177</span> RateLimiter limiter = new FixedIntervalRateLimiter();<a name="line.177"></a> |
| <span class="sourceLineNo">178</span> limiter.set(10, TimeUnit.SECONDS);<a name="line.178"></a> |
| <span class="sourceLineNo">179</span><a name="line.179"></a> |
| <span class="sourceLineNo">180</span> int count = 0; // control the test count<a name="line.180"></a> |
| <span class="sourceLineNo">181</span> while ((count++) < 10) {<a name="line.181"></a> |
| <span class="sourceLineNo">182</span> // test will get 3 resources per 0.5 sec. so it will get 6 resources per sec.<a name="line.182"></a> |
| <span class="sourceLineNo">183</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 500);<a name="line.183"></a> |
| <span class="sourceLineNo">184</span> for (int i = 0; i < 3; i++) {<a name="line.184"></a> |
| <span class="sourceLineNo">185</span> // 6 resources/sec < limit, so limiter.canExecute(nowTs, lastTs) should be true<a name="line.185"></a> |
| <span class="sourceLineNo">186</span> assertEquals(limiter.getWaitIntervalMs(), 0);<a name="line.186"></a> |
| <span class="sourceLineNo">187</span> limiter.consume();<a name="line.187"></a> |
| <span class="sourceLineNo">188</span> }<a name="line.188"></a> |
| <span class="sourceLineNo">189</span> }<a name="line.189"></a> |
| <span class="sourceLineNo">190</span> }<a name="line.190"></a> |
| <span class="sourceLineNo">191</span><a name="line.191"></a> |
| <span class="sourceLineNo">192</span> @Test<a name="line.192"></a> |
| <span class="sourceLineNo">193</span> public void testCanExecuteOfAverageIntervalRateLimiter() throws InterruptedException {<a name="line.193"></a> |
| <span class="sourceLineNo">194</span> RateLimiter limiter = new AverageIntervalRateLimiter();<a name="line.194"></a> |
| <span class="sourceLineNo">195</span> // when set limit is 100 per sec, this AverageIntervalRateLimiter will support at max 200 per<a name="line.195"></a> |
| <span class="sourceLineNo">196</span> // sec<a name="line.196"></a> |
| <span class="sourceLineNo">197</span> limiter.set(100, TimeUnit.SECONDS);<a name="line.197"></a> |
| <span class="sourceLineNo">198</span> limiter.setNextRefillTime(EnvironmentEdgeManager.currentTime());<a name="line.198"></a> |
| <span class="sourceLineNo">199</span> assertEquals(50, testCanExecuteByRate(limiter, 50));<a name="line.199"></a> |
| <span class="sourceLineNo">200</span><a name="line.200"></a> |
| <span class="sourceLineNo">201</span> // refill the avail to limit<a name="line.201"></a> |
| <span class="sourceLineNo">202</span> limiter.set(100, TimeUnit.SECONDS);<a name="line.202"></a> |
| <span class="sourceLineNo">203</span> limiter.setNextRefillTime(EnvironmentEdgeManager.currentTime());<a name="line.203"></a> |
| <span class="sourceLineNo">204</span> assertEquals(100, testCanExecuteByRate(limiter, 100));<a name="line.204"></a> |
| <span class="sourceLineNo">205</span><a name="line.205"></a> |
| <span class="sourceLineNo">206</span> // refill the avail to limit<a name="line.206"></a> |
| <span class="sourceLineNo">207</span> limiter.set(100, TimeUnit.SECONDS);<a name="line.207"></a> |
| <span class="sourceLineNo">208</span> limiter.setNextRefillTime(EnvironmentEdgeManager.currentTime());<a name="line.208"></a> |
| <span class="sourceLineNo">209</span> assertEquals(200, testCanExecuteByRate(limiter, 200));<a name="line.209"></a> |
| <span class="sourceLineNo">210</span><a name="line.210"></a> |
| <span class="sourceLineNo">211</span> // refill the avail to limit<a name="line.211"></a> |
| <span class="sourceLineNo">212</span> limiter.set(100, TimeUnit.SECONDS);<a name="line.212"></a> |
| <span class="sourceLineNo">213</span> limiter.setNextRefillTime(EnvironmentEdgeManager.currentTime());<a name="line.213"></a> |
| <span class="sourceLineNo">214</span> assertEquals(200, testCanExecuteByRate(limiter, 500));<a name="line.214"></a> |
| <span class="sourceLineNo">215</span> }<a name="line.215"></a> |
| <span class="sourceLineNo">216</span><a name="line.216"></a> |
| <span class="sourceLineNo">217</span> @Test<a name="line.217"></a> |
| <span class="sourceLineNo">218</span> public void testCanExecuteOfFixedIntervalRateLimiter() throws InterruptedException {<a name="line.218"></a> |
| <span class="sourceLineNo">219</span> RateLimiter limiter = new FixedIntervalRateLimiter();<a name="line.219"></a> |
| <span class="sourceLineNo">220</span> // when set limit is 100 per sec, this FixedIntervalRateLimiter will support at max 100 per sec<a name="line.220"></a> |
| <span class="sourceLineNo">221</span> limiter.set(100, TimeUnit.SECONDS);<a name="line.221"></a> |
| <span class="sourceLineNo">222</span> limiter.setNextRefillTime(EnvironmentEdgeManager.currentTime());<a name="line.222"></a> |
| <span class="sourceLineNo">223</span> assertEquals(50, testCanExecuteByRate(limiter, 50));<a name="line.223"></a> |
| <span class="sourceLineNo">224</span><a name="line.224"></a> |
| <span class="sourceLineNo">225</span> // refill the avail to limit<a name="line.225"></a> |
| <span class="sourceLineNo">226</span> limiter.set(100, TimeUnit.SECONDS);<a name="line.226"></a> |
| <span class="sourceLineNo">227</span> limiter.setNextRefillTime(EnvironmentEdgeManager.currentTime());<a name="line.227"></a> |
| <span class="sourceLineNo">228</span> assertEquals(100, testCanExecuteByRate(limiter, 100));<a name="line.228"></a> |
| <span class="sourceLineNo">229</span><a name="line.229"></a> |
| <span class="sourceLineNo">230</span> // refill the avail to limit<a name="line.230"></a> |
| <span class="sourceLineNo">231</span> limiter.set(100, TimeUnit.SECONDS);<a name="line.231"></a> |
| <span class="sourceLineNo">232</span> limiter.setNextRefillTime(EnvironmentEdgeManager.currentTime());<a name="line.232"></a> |
| <span class="sourceLineNo">233</span> assertEquals(100, testCanExecuteByRate(limiter, 200));<a name="line.233"></a> |
| <span class="sourceLineNo">234</span> }<a name="line.234"></a> |
| <span class="sourceLineNo">235</span><a name="line.235"></a> |
| <span class="sourceLineNo">236</span> public int testCanExecuteByRate(RateLimiter limiter, int rate) {<a name="line.236"></a> |
| <span class="sourceLineNo">237</span> int request = 0;<a name="line.237"></a> |
| <span class="sourceLineNo">238</span> int count = 0;<a name="line.238"></a> |
| <span class="sourceLineNo">239</span> while ((request++) < rate) {<a name="line.239"></a> |
| <span class="sourceLineNo">240</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - limiter.getTimeUnitInMillis() / rate);<a name="line.240"></a> |
| <span class="sourceLineNo">241</span> if (limiter.getWaitIntervalMs() == 0) {<a name="line.241"></a> |
| <span class="sourceLineNo">242</span> count++;<a name="line.242"></a> |
| <span class="sourceLineNo">243</span> limiter.consume();<a name="line.243"></a> |
| <span class="sourceLineNo">244</span> }<a name="line.244"></a> |
| <span class="sourceLineNo">245</span> }<a name="line.245"></a> |
| <span class="sourceLineNo">246</span> return count;<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> @Test<a name="line.249"></a> |
| <span class="sourceLineNo">250</span> public void testRefillOfAverageIntervalRateLimiter() throws InterruptedException {<a name="line.250"></a> |
| <span class="sourceLineNo">251</span> RateLimiter limiter = new AverageIntervalRateLimiter();<a name="line.251"></a> |
| <span class="sourceLineNo">252</span> limiter.set(60, TimeUnit.SECONDS);<a name="line.252"></a> |
| <span class="sourceLineNo">253</span> assertEquals(60, limiter.getAvailable());<a name="line.253"></a> |
| <span class="sourceLineNo">254</span> // first refill, will return the number same with limit<a name="line.254"></a> |
| <span class="sourceLineNo">255</span> assertEquals(60, limiter.refill(limiter.getLimit()));<a name="line.255"></a> |
| <span class="sourceLineNo">256</span><a name="line.256"></a> |
| <span class="sourceLineNo">257</span> limiter.consume(30);<a name="line.257"></a> |
| <span class="sourceLineNo">258</span><a name="line.258"></a> |
| <span class="sourceLineNo">259</span> // after 0.2 sec, refill should return 12<a name="line.259"></a> |
| <span class="sourceLineNo">260</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 200);<a name="line.260"></a> |
| <span class="sourceLineNo">261</span> assertEquals(12, limiter.refill(limiter.getLimit()));<a name="line.261"></a> |
| <span class="sourceLineNo">262</span><a name="line.262"></a> |
| <span class="sourceLineNo">263</span> // after 0.5 sec, refill should return 30<a name="line.263"></a> |
| <span class="sourceLineNo">264</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 500);<a name="line.264"></a> |
| <span class="sourceLineNo">265</span> assertEquals(30, limiter.refill(limiter.getLimit()));<a name="line.265"></a> |
| <span class="sourceLineNo">266</span><a name="line.266"></a> |
| <span class="sourceLineNo">267</span> // after 1 sec, refill should return 60<a name="line.267"></a> |
| <span class="sourceLineNo">268</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 1000);<a name="line.268"></a> |
| <span class="sourceLineNo">269</span> assertEquals(60, limiter.refill(limiter.getLimit()));<a name="line.269"></a> |
| <span class="sourceLineNo">270</span><a name="line.270"></a> |
| <span class="sourceLineNo">271</span> // after more than 1 sec, refill should return at max 60<a name="line.271"></a> |
| <span class="sourceLineNo">272</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 3000);<a name="line.272"></a> |
| <span class="sourceLineNo">273</span> assertEquals(60, limiter.refill(limiter.getLimit()));<a name="line.273"></a> |
| <span class="sourceLineNo">274</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 5000);<a name="line.274"></a> |
| <span class="sourceLineNo">275</span> assertEquals(60, limiter.refill(limiter.getLimit()));<a name="line.275"></a> |
| <span class="sourceLineNo">276</span> }<a name="line.276"></a> |
| <span class="sourceLineNo">277</span><a name="line.277"></a> |
| <span class="sourceLineNo">278</span> @Test<a name="line.278"></a> |
| <span class="sourceLineNo">279</span> public void testRefillOfFixedIntervalRateLimiter() throws InterruptedException {<a name="line.279"></a> |
| <span class="sourceLineNo">280</span> RateLimiter limiter = new FixedIntervalRateLimiter();<a name="line.280"></a> |
| <span class="sourceLineNo">281</span> limiter.set(60, TimeUnit.SECONDS);<a name="line.281"></a> |
| <span class="sourceLineNo">282</span> assertEquals(60, limiter.getAvailable());<a name="line.282"></a> |
| <span class="sourceLineNo">283</span> // first refill, will return the number same with limit<a name="line.283"></a> |
| <span class="sourceLineNo">284</span> assertEquals(60, limiter.refill(limiter.getLimit()));<a name="line.284"></a> |
| <span class="sourceLineNo">285</span><a name="line.285"></a> |
| <span class="sourceLineNo">286</span> limiter.consume(30);<a name="line.286"></a> |
| <span class="sourceLineNo">287</span><a name="line.287"></a> |
| <span class="sourceLineNo">288</span> // after 0.2 sec, refill should return 0<a name="line.288"></a> |
| <span class="sourceLineNo">289</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 200);<a name="line.289"></a> |
| <span class="sourceLineNo">290</span> assertEquals(0, limiter.refill(limiter.getLimit()));<a name="line.290"></a> |
| <span class="sourceLineNo">291</span><a name="line.291"></a> |
| <span class="sourceLineNo">292</span> // after 0.5 sec, refill should return 0<a name="line.292"></a> |
| <span class="sourceLineNo">293</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 500);<a name="line.293"></a> |
| <span class="sourceLineNo">294</span> assertEquals(0, limiter.refill(limiter.getLimit()));<a name="line.294"></a> |
| <span class="sourceLineNo">295</span><a name="line.295"></a> |
| <span class="sourceLineNo">296</span> // after 1 sec, refill should return 60<a name="line.296"></a> |
| <span class="sourceLineNo">297</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 1000);<a name="line.297"></a> |
| <span class="sourceLineNo">298</span> assertEquals(60, limiter.refill(limiter.getLimit()));<a name="line.298"></a> |
| <span class="sourceLineNo">299</span><a name="line.299"></a> |
| <span class="sourceLineNo">300</span> // after more than 1 sec, refill should return at max 60<a name="line.300"></a> |
| <span class="sourceLineNo">301</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 3000);<a name="line.301"></a> |
| <span class="sourceLineNo">302</span> assertEquals(60, limiter.refill(limiter.getLimit()));<a name="line.302"></a> |
| <span class="sourceLineNo">303</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 5000);<a name="line.303"></a> |
| <span class="sourceLineNo">304</span> assertEquals(60, limiter.refill(limiter.getLimit()));<a name="line.304"></a> |
| <span class="sourceLineNo">305</span> }<a name="line.305"></a> |
| <span class="sourceLineNo">306</span><a name="line.306"></a> |
| <span class="sourceLineNo">307</span> @Test<a name="line.307"></a> |
| <span class="sourceLineNo">308</span> public void testUnconfiguredLimiters() throws InterruptedException {<a name="line.308"></a> |
| <span class="sourceLineNo">309</span><a name="line.309"></a> |
| <span class="sourceLineNo">310</span> ManualEnvironmentEdge testEdge = new ManualEnvironmentEdge();<a name="line.310"></a> |
| <span class="sourceLineNo">311</span> EnvironmentEdgeManager.injectEdge(testEdge);<a name="line.311"></a> |
| <span class="sourceLineNo">312</span> long limit = Long.MAX_VALUE;<a name="line.312"></a> |
| <span class="sourceLineNo">313</span><a name="line.313"></a> |
| <span class="sourceLineNo">314</span> // For unconfigured limiters, it is supposed to use as much as possible<a name="line.314"></a> |
| <span class="sourceLineNo">315</span> RateLimiter avgLimiter = new AverageIntervalRateLimiter();<a name="line.315"></a> |
| <span class="sourceLineNo">316</span> RateLimiter fixLimiter = new FixedIntervalRateLimiter();<a name="line.316"></a> |
| <span class="sourceLineNo">317</span><a name="line.317"></a> |
| <span class="sourceLineNo">318</span> assertEquals(limit, avgLimiter.getAvailable());<a name="line.318"></a> |
| <span class="sourceLineNo">319</span> assertEquals(limit, fixLimiter.getAvailable());<a name="line.319"></a> |
| <span class="sourceLineNo">320</span><a name="line.320"></a> |
| <span class="sourceLineNo">321</span> assertEquals(0, avgLimiter.getWaitIntervalMs(limit));<a name="line.321"></a> |
| <span class="sourceLineNo">322</span> avgLimiter.consume(limit);<a name="line.322"></a> |
| <span class="sourceLineNo">323</span><a name="line.323"></a> |
| <span class="sourceLineNo">324</span> assertEquals(0, fixLimiter.getWaitIntervalMs(limit));<a name="line.324"></a> |
| <span class="sourceLineNo">325</span> fixLimiter.consume(limit);<a name="line.325"></a> |
| <span class="sourceLineNo">326</span><a name="line.326"></a> |
| <span class="sourceLineNo">327</span> // Make sure that available is Long.MAX_VALUE<a name="line.327"></a> |
| <span class="sourceLineNo">328</span> assertEquals(limit, avgLimiter.getAvailable());<a name="line.328"></a> |
| <span class="sourceLineNo">329</span> assertEquals(limit, fixLimiter.getAvailable());<a name="line.329"></a> |
| <span class="sourceLineNo">330</span><a name="line.330"></a> |
| <span class="sourceLineNo">331</span> // after 100 millseconds, it should be able to execute limit as well<a name="line.331"></a> |
| <span class="sourceLineNo">332</span> testEdge.incValue(100);<a name="line.332"></a> |
| <span class="sourceLineNo">333</span><a name="line.333"></a> |
| <span class="sourceLineNo">334</span> assertEquals(0, avgLimiter.getWaitIntervalMs(limit));<a name="line.334"></a> |
| <span class="sourceLineNo">335</span> avgLimiter.consume(limit);<a name="line.335"></a> |
| <span class="sourceLineNo">336</span><a name="line.336"></a> |
| <span class="sourceLineNo">337</span> assertEquals(0, fixLimiter.getWaitIntervalMs(limit));<a name="line.337"></a> |
| <span class="sourceLineNo">338</span> fixLimiter.consume(limit);<a name="line.338"></a> |
| <span class="sourceLineNo">339</span><a name="line.339"></a> |
| <span class="sourceLineNo">340</span> // Make sure that available is Long.MAX_VALUE<a name="line.340"></a> |
| <span class="sourceLineNo">341</span> assertEquals(limit, avgLimiter.getAvailable());<a name="line.341"></a> |
| <span class="sourceLineNo">342</span> assertEquals(limit, fixLimiter.getAvailable());<a name="line.342"></a> |
| <span class="sourceLineNo">343</span><a name="line.343"></a> |
| <span class="sourceLineNo">344</span> EnvironmentEdgeManager.reset();<a name="line.344"></a> |
| <span class="sourceLineNo">345</span> }<a name="line.345"></a> |
| <span class="sourceLineNo">346</span><a name="line.346"></a> |
| <span class="sourceLineNo">347</span> @Test<a name="line.347"></a> |
| <span class="sourceLineNo">348</span> public void testExtremeLimiters() throws InterruptedException {<a name="line.348"></a> |
| <span class="sourceLineNo">349</span><a name="line.349"></a> |
| <span class="sourceLineNo">350</span> ManualEnvironmentEdge testEdge = new ManualEnvironmentEdge();<a name="line.350"></a> |
| <span class="sourceLineNo">351</span> EnvironmentEdgeManager.injectEdge(testEdge);<a name="line.351"></a> |
| <span class="sourceLineNo">352</span> long limit = Long.MAX_VALUE - 1;<a name="line.352"></a> |
| <span class="sourceLineNo">353</span><a name="line.353"></a> |
| <span class="sourceLineNo">354</span> RateLimiter avgLimiter = new AverageIntervalRateLimiter();<a name="line.354"></a> |
| <span class="sourceLineNo">355</span> avgLimiter.set(limit, TimeUnit.SECONDS);<a name="line.355"></a> |
| <span class="sourceLineNo">356</span> RateLimiter fixLimiter = new FixedIntervalRateLimiter();<a name="line.356"></a> |
| <span class="sourceLineNo">357</span> fixLimiter.set(limit, TimeUnit.SECONDS);<a name="line.357"></a> |
| <span class="sourceLineNo">358</span><a name="line.358"></a> |
| <span class="sourceLineNo">359</span> assertEquals(limit, avgLimiter.getAvailable());<a name="line.359"></a> |
| <span class="sourceLineNo">360</span> assertEquals(limit, fixLimiter.getAvailable());<a name="line.360"></a> |
| <span class="sourceLineNo">361</span><a name="line.361"></a> |
| <span class="sourceLineNo">362</span> assertEquals(0, avgLimiter.getWaitIntervalMs(limit / 2));<a name="line.362"></a> |
| <span class="sourceLineNo">363</span> avgLimiter.consume(limit / 2);<a name="line.363"></a> |
| <span class="sourceLineNo">364</span><a name="line.364"></a> |
| <span class="sourceLineNo">365</span> assertEquals(0, fixLimiter.getWaitIntervalMs(limit / 2));<a name="line.365"></a> |
| <span class="sourceLineNo">366</span> fixLimiter.consume(limit / 2);<a name="line.366"></a> |
| <span class="sourceLineNo">367</span><a name="line.367"></a> |
| <span class="sourceLineNo">368</span> // Make sure that available is whatever left<a name="line.368"></a> |
| <span class="sourceLineNo">369</span> assertEquals((limit - (limit / 2)), avgLimiter.getAvailable());<a name="line.369"></a> |
| <span class="sourceLineNo">370</span> assertEquals((limit - (limit / 2)), fixLimiter.getAvailable());<a name="line.370"></a> |
| <span class="sourceLineNo">371</span><a name="line.371"></a> |
| <span class="sourceLineNo">372</span> // after 100 millseconds, both should not be able to execute the limit<a name="line.372"></a> |
| <span class="sourceLineNo">373</span> testEdge.incValue(100);<a name="line.373"></a> |
| <span class="sourceLineNo">374</span><a name="line.374"></a> |
| <span class="sourceLineNo">375</span> assertNotEquals(0, avgLimiter.getWaitIntervalMs(limit));<a name="line.375"></a> |
| <span class="sourceLineNo">376</span> assertNotEquals(0, fixLimiter.getWaitIntervalMs(limit));<a name="line.376"></a> |
| <span class="sourceLineNo">377</span><a name="line.377"></a> |
| <span class="sourceLineNo">378</span> // after 500 millseconds, average interval limiter should be able to execute the limit<a name="line.378"></a> |
| <span class="sourceLineNo">379</span> testEdge.incValue(500);<a name="line.379"></a> |
| <span class="sourceLineNo">380</span> assertEquals(0, avgLimiter.getWaitIntervalMs(limit));<a name="line.380"></a> |
| <span class="sourceLineNo">381</span> assertNotEquals(0, fixLimiter.getWaitIntervalMs(limit));<a name="line.381"></a> |
| <span class="sourceLineNo">382</span><a name="line.382"></a> |
| <span class="sourceLineNo">383</span> // Make sure that available is correct<a name="line.383"></a> |
| <span class="sourceLineNo">384</span> assertEquals(limit, avgLimiter.getAvailable());<a name="line.384"></a> |
| <span class="sourceLineNo">385</span> assertEquals((limit - (limit / 2)), fixLimiter.getAvailable());<a name="line.385"></a> |
| <span class="sourceLineNo">386</span><a name="line.386"></a> |
| <span class="sourceLineNo">387</span> // after 500 millseconds, both should be able to execute<a name="line.387"></a> |
| <span class="sourceLineNo">388</span> testEdge.incValue(500);<a name="line.388"></a> |
| <span class="sourceLineNo">389</span> assertEquals(0, avgLimiter.getWaitIntervalMs(limit));<a name="line.389"></a> |
| <span class="sourceLineNo">390</span> assertEquals(0, fixLimiter.getWaitIntervalMs(limit));<a name="line.390"></a> |
| <span class="sourceLineNo">391</span><a name="line.391"></a> |
| <span class="sourceLineNo">392</span> // Make sure that available is Long.MAX_VALUE<a name="line.392"></a> |
| <span class="sourceLineNo">393</span> assertEquals(limit, avgLimiter.getAvailable());<a name="line.393"></a> |
| <span class="sourceLineNo">394</span> assertEquals(limit, fixLimiter.getAvailable());<a name="line.394"></a> |
| <span class="sourceLineNo">395</span><a name="line.395"></a> |
| <span class="sourceLineNo">396</span> EnvironmentEdgeManager.reset();<a name="line.396"></a> |
| <span class="sourceLineNo">397</span> }<a name="line.397"></a> |
| <span class="sourceLineNo">398</span><a name="line.398"></a> |
| <span class="sourceLineNo">399</span> /*<a name="line.399"></a> |
| <span class="sourceLineNo">400</span> * This test case is tricky. Basically, it simulates the following events: Thread-1 Thread-2 t0:<a name="line.400"></a> |
| <span class="sourceLineNo">401</span> * canExecute(100) and consume(100) t1: canExecute(100), avail may be increased by 80 t2:<a name="line.401"></a> |
| <span class="sourceLineNo">402</span> * consume(-80) as actual size is 20 It will check if consume(-80) can handle overflow correctly.<a name="line.402"></a> |
| <span class="sourceLineNo">403</span> */<a name="line.403"></a> |
| <span class="sourceLineNo">404</span> @Test<a name="line.404"></a> |
| <span class="sourceLineNo">405</span> public void testLimiterCompensationOverflow() throws InterruptedException {<a name="line.405"></a> |
| <span class="sourceLineNo">406</span><a name="line.406"></a> |
| <span class="sourceLineNo">407</span> long limit = Long.MAX_VALUE - 1;<a name="line.407"></a> |
| <span class="sourceLineNo">408</span> long guessNumber = 100;<a name="line.408"></a> |
| <span class="sourceLineNo">409</span><a name="line.409"></a> |
| <span class="sourceLineNo">410</span> // For unconfigured limiters, it is supposed to use as much as possible<a name="line.410"></a> |
| <span class="sourceLineNo">411</span> RateLimiter avgLimiter = new AverageIntervalRateLimiter();<a name="line.411"></a> |
| <span class="sourceLineNo">412</span> avgLimiter.set(limit, TimeUnit.SECONDS);<a name="line.412"></a> |
| <span class="sourceLineNo">413</span><a name="line.413"></a> |
| <span class="sourceLineNo">414</span> assertEquals(limit, avgLimiter.getAvailable());<a name="line.414"></a> |
| <span class="sourceLineNo">415</span><a name="line.415"></a> |
| <span class="sourceLineNo">416</span> // The initial guess is that 100 bytes.<a name="line.416"></a> |
| <span class="sourceLineNo">417</span> assertEquals(0, avgLimiter.getWaitIntervalMs(guessNumber));<a name="line.417"></a> |
| <span class="sourceLineNo">418</span> avgLimiter.consume(guessNumber);<a name="line.418"></a> |
| <span class="sourceLineNo">419</span><a name="line.419"></a> |
| <span class="sourceLineNo">420</span> // Make sure that available is whatever left<a name="line.420"></a> |
| <span class="sourceLineNo">421</span> assertEquals((limit - guessNumber), avgLimiter.getAvailable());<a name="line.421"></a> |
| <span class="sourceLineNo">422</span><a name="line.422"></a> |
| <span class="sourceLineNo">423</span> // Manually set avil to simulate that another thread call canExecute().<a name="line.423"></a> |
| <span class="sourceLineNo">424</span> // It is simulated by consume().<a name="line.424"></a> |
| <span class="sourceLineNo">425</span> avgLimiter.consume(-80);<a name="line.425"></a> |
| <span class="sourceLineNo">426</span> assertEquals((limit - guessNumber + 80), avgLimiter.getAvailable());<a name="line.426"></a> |
| <span class="sourceLineNo">427</span><a name="line.427"></a> |
| <span class="sourceLineNo">428</span> // Now thread1 compensates 80<a name="line.428"></a> |
| <span class="sourceLineNo">429</span> avgLimiter.consume(-80);<a name="line.429"></a> |
| <span class="sourceLineNo">430</span> assertEquals(limit, avgLimiter.getAvailable());<a name="line.430"></a> |
| <span class="sourceLineNo">431</span> }<a name="line.431"></a> |
| <span class="sourceLineNo">432</span><a name="line.432"></a> |
| <span class="sourceLineNo">433</span> @Test<a name="line.433"></a> |
| <span class="sourceLineNo">434</span> public void itRunsFullWithPartialRefillInterval() {<a name="line.434"></a> |
| <span class="sourceLineNo">435</span> RateLimiter limiter = new FixedIntervalRateLimiter(100);<a name="line.435"></a> |
| <span class="sourceLineNo">436</span> limiter.set(10, TimeUnit.SECONDS);<a name="line.436"></a> |
| <span class="sourceLineNo">437</span> assertEquals(0, limiter.getWaitIntervalMs());<a name="line.437"></a> |
| <span class="sourceLineNo">438</span><a name="line.438"></a> |
| <span class="sourceLineNo">439</span> // Consume the quota<a name="line.439"></a> |
| <span class="sourceLineNo">440</span> limiter.consume(10);<a name="line.440"></a> |
| <span class="sourceLineNo">441</span><a name="line.441"></a> |
| <span class="sourceLineNo">442</span> // Need to wait 1s to acquire another resource<a name="line.442"></a> |
| <span class="sourceLineNo">443</span> long waitInterval = limiter.waitInterval(10);<a name="line.443"></a> |
| <span class="sourceLineNo">444</span> assertTrue(900 < waitInterval);<a name="line.444"></a> |
| <span class="sourceLineNo">445</span> assertTrue(1000 >= waitInterval);<a name="line.445"></a> |
| <span class="sourceLineNo">446</span> // We need to wait 2s to acquire more than 10 resources<a name="line.446"></a> |
| <span class="sourceLineNo">447</span> waitInterval = limiter.waitInterval(20);<a name="line.447"></a> |
| <span class="sourceLineNo">448</span> assertTrue(1900 < waitInterval);<a name="line.448"></a> |
| <span class="sourceLineNo">449</span> assertTrue(2000 >= waitInterval);<a name="line.449"></a> |
| <span class="sourceLineNo">450</span><a name="line.450"></a> |
| <span class="sourceLineNo">451</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 1000);<a name="line.451"></a> |
| <span class="sourceLineNo">452</span> // We've waited the full interval, so we should now have 10<a name="line.452"></a> |
| <span class="sourceLineNo">453</span> assertEquals(0, limiter.getWaitIntervalMs(10));<a name="line.453"></a> |
| <span class="sourceLineNo">454</span> assertEquals(0, limiter.waitInterval());<a name="line.454"></a> |
| <span class="sourceLineNo">455</span> }<a name="line.455"></a> |
| <span class="sourceLineNo">456</span><a name="line.456"></a> |
| <span class="sourceLineNo">457</span> @Test<a name="line.457"></a> |
| <span class="sourceLineNo">458</span> public void itRunsPartialRefillIntervals() {<a name="line.458"></a> |
| <span class="sourceLineNo">459</span> RateLimiter limiter = new FixedIntervalRateLimiter(100);<a name="line.459"></a> |
| <span class="sourceLineNo">460</span> limiter.set(10, TimeUnit.SECONDS);<a name="line.460"></a> |
| <span class="sourceLineNo">461</span> assertEquals(0, limiter.getWaitIntervalMs());<a name="line.461"></a> |
| <span class="sourceLineNo">462</span><a name="line.462"></a> |
| <span class="sourceLineNo">463</span> // Consume the quota<a name="line.463"></a> |
| <span class="sourceLineNo">464</span> limiter.consume(10);<a name="line.464"></a> |
| <span class="sourceLineNo">465</span><a name="line.465"></a> |
| <span class="sourceLineNo">466</span> // Need to wait 1s to acquire another resource<a name="line.466"></a> |
| <span class="sourceLineNo">467</span> long waitInterval = limiter.waitInterval(10);<a name="line.467"></a> |
| <span class="sourceLineNo">468</span> assertTrue(900 < waitInterval);<a name="line.468"></a> |
| <span class="sourceLineNo">469</span> assertTrue(1000 >= waitInterval);<a name="line.469"></a> |
| <span class="sourceLineNo">470</span> // We need to wait 2s to acquire more than 10 resources<a name="line.470"></a> |
| <span class="sourceLineNo">471</span> waitInterval = limiter.waitInterval(20);<a name="line.471"></a> |
| <span class="sourceLineNo">472</span> assertTrue(1900 < waitInterval);<a name="line.472"></a> |
| <span class="sourceLineNo">473</span> assertTrue(2000 >= waitInterval);<a name="line.473"></a> |
| <span class="sourceLineNo">474</span> // We need to wait 0<=x<=100ms to acquire 1 resource<a name="line.474"></a> |
| <span class="sourceLineNo">475</span> waitInterval = limiter.waitInterval(1);<a name="line.475"></a> |
| <span class="sourceLineNo">476</span> assertTrue(0 < waitInterval);<a name="line.476"></a> |
| <span class="sourceLineNo">477</span> assertTrue(100 >= waitInterval);<a name="line.477"></a> |
| <span class="sourceLineNo">478</span><a name="line.478"></a> |
| <span class="sourceLineNo">479</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 500);<a name="line.479"></a> |
| <span class="sourceLineNo">480</span> // We've waited half the interval, so we should now have half available<a name="line.480"></a> |
| <span class="sourceLineNo">481</span> assertEquals(0, limiter.getWaitIntervalMs(5));<a name="line.481"></a> |
| <span class="sourceLineNo">482</span> assertEquals(0, limiter.waitInterval());<a name="line.482"></a> |
| <span class="sourceLineNo">483</span> }<a name="line.483"></a> |
| <span class="sourceLineNo">484</span><a name="line.484"></a> |
| <span class="sourceLineNo">485</span> @Test<a name="line.485"></a> |
| <span class="sourceLineNo">486</span> public void itRunsRepeatedPartialRefillIntervals() {<a name="line.486"></a> |
| <span class="sourceLineNo">487</span> RateLimiter limiter = new FixedIntervalRateLimiter(100);<a name="line.487"></a> |
| <span class="sourceLineNo">488</span> limiter.set(10, TimeUnit.SECONDS);<a name="line.488"></a> |
| <span class="sourceLineNo">489</span> assertEquals(0, limiter.getWaitIntervalMs());<a name="line.489"></a> |
| <span class="sourceLineNo">490</span> // Consume the quota<a name="line.490"></a> |
| <span class="sourceLineNo">491</span> limiter.consume(10);<a name="line.491"></a> |
| <span class="sourceLineNo">492</span> for (int i = 0; i < 100; i++) {<a name="line.492"></a> |
| <span class="sourceLineNo">493</span> limiter.setNextRefillTime(limiter.getNextRefillTime() - 100); // free 1 resource<a name="line.493"></a> |
| <span class="sourceLineNo">494</span> limiter.consume(1);<a name="line.494"></a> |
| <span class="sourceLineNo">495</span> assertFalse(limiter.isAvailable(1)); // all resources consumed<a name="line.495"></a> |
| <span class="sourceLineNo">496</span> assertTrue(limiter.isAvailable(0)); // not negative<a name="line.496"></a> |
| <span class="sourceLineNo">497</span> }<a name="line.497"></a> |
| <span class="sourceLineNo">498</span> }<a name="line.498"></a> |
| <span class="sourceLineNo">499</span>}<a name="line.499"></a> |
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| </pre> |
| </div> |
| </body> |
| </html> |
