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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;<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.assertNotEquals;<a name="line.21"></a> |
| <span class="sourceLineNo">022</span><a name="line.22"></a> |
| <span class="sourceLineNo">023</span>import java.util.ArrayList;<a name="line.23"></a> |
| <span class="sourceLineNo">024</span>import java.util.List;<a name="line.24"></a> |
| <span class="sourceLineNo">025</span>import java.util.Random;<a name="line.25"></a> |
| <span class="sourceLineNo">026</span>import java.util.concurrent.Callable;<a name="line.26"></a> |
| <span class="sourceLineNo">027</span>import java.util.concurrent.ExecutorService;<a name="line.27"></a> |
| <span class="sourceLineNo">028</span>import java.util.concurrent.Executors;<a name="line.28"></a> |
| <span class="sourceLineNo">029</span>import java.util.concurrent.Future;<a name="line.29"></a> |
| <span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.testclassification.MetricsTests;<a name="line.30"></a> |
| <span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.testclassification.SmallTests;<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>@Category({MetricsTests.class, SmallTests.class})<a name="line.36"></a> |
| <span class="sourceLineNo">037</span>public class TestCompatibilitySingletonFactory {<a name="line.37"></a> |
| <span class="sourceLineNo">038</span><a name="line.38"></a> |
| <span class="sourceLineNo">039</span> @ClassRule<a name="line.39"></a> |
| <span class="sourceLineNo">040</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.40"></a> |
| <span class="sourceLineNo">041</span> HBaseClassTestRule.forClass(TestCompatibilitySingletonFactory.class);<a name="line.41"></a> |
| <span class="sourceLineNo">042</span><a name="line.42"></a> |
| <span class="sourceLineNo">043</span> private static final int ITERATIONS = 100000;<a name="line.43"></a> |
| <span class="sourceLineNo">044</span> private static final Random RANDOM = new Random();<a name="line.44"></a> |
| <span class="sourceLineNo">045</span><a name="line.45"></a> |
| <span class="sourceLineNo">046</span> private class TestCompatibilitySingletonFactoryCallable implements Callable<String> {<a name="line.46"></a> |
| <span class="sourceLineNo">047</span><a name="line.47"></a> |
| <span class="sourceLineNo">048</span> @Override<a name="line.48"></a> |
| <span class="sourceLineNo">049</span> public String call() throws Exception {<a name="line.49"></a> |
| <span class="sourceLineNo">050</span> Thread.sleep(RANDOM.nextInt(10));<a name="line.50"></a> |
| <span class="sourceLineNo">051</span> RandomStringGenerator<a name="line.51"></a> |
| <span class="sourceLineNo">052</span> instance =<a name="line.52"></a> |
| <span class="sourceLineNo">053</span> CompatibilitySingletonFactory.getInstance(RandomStringGenerator.class);<a name="line.53"></a> |
| <span class="sourceLineNo">054</span> return instance.getRandString();<a name="line.54"></a> |
| <span class="sourceLineNo">055</span> }<a name="line.55"></a> |
| <span class="sourceLineNo">056</span> }<a name="line.56"></a> |
| <span class="sourceLineNo">057</span><a name="line.57"></a> |
| <span class="sourceLineNo">058</span> @Test<a name="line.58"></a> |
| <span class="sourceLineNo">059</span> public void testGetInstance() throws Exception {<a name="line.59"></a> |
| <span class="sourceLineNo">060</span> List<TestCompatibilitySingletonFactoryCallable> callables = new ArrayList<>(ITERATIONS);<a name="line.60"></a> |
| <span class="sourceLineNo">061</span> List<String> resultStrings = new ArrayList<>(ITERATIONS);<a name="line.61"></a> |
| <span class="sourceLineNo">062</span><a name="line.62"></a> |
| <span class="sourceLineNo">063</span><a name="line.63"></a> |
| <span class="sourceLineNo">064</span> // Create the callables.<a name="line.64"></a> |
| <span class="sourceLineNo">065</span> for (int i = 0; i < ITERATIONS; i++) {<a name="line.65"></a> |
| <span class="sourceLineNo">066</span> callables.add(new TestCompatibilitySingletonFactoryCallable());<a name="line.66"></a> |
| <span class="sourceLineNo">067</span> }<a name="line.67"></a> |
| <span class="sourceLineNo">068</span><a name="line.68"></a> |
| <span class="sourceLineNo">069</span> // Now run the callables.<a name="line.69"></a> |
| <span class="sourceLineNo">070</span> ExecutorService executorService = Executors.newFixedThreadPool(100);<a name="line.70"></a> |
| <span class="sourceLineNo">071</span> List<Future<String>> futures = executorService.invokeAll(callables);<a name="line.71"></a> |
| <span class="sourceLineNo">072</span><a name="line.72"></a> |
| <span class="sourceLineNo">073</span> // Wait for them all to finish.<a name="line.73"></a> |
| <span class="sourceLineNo">074</span> for (Future<String> f : futures) {<a name="line.74"></a> |
| <span class="sourceLineNo">075</span> resultStrings.add(f.get());<a name="line.75"></a> |
| <span class="sourceLineNo">076</span> }<a name="line.76"></a> |
| <span class="sourceLineNo">077</span><a name="line.77"></a> |
| <span class="sourceLineNo">078</span> // Get the first string.<a name="line.78"></a> |
| <span class="sourceLineNo">079</span> String firstString = resultStrings.get(0);<a name="line.79"></a> |
| <span class="sourceLineNo">080</span><a name="line.80"></a> |
| <span class="sourceLineNo">081</span><a name="line.81"></a> |
| <span class="sourceLineNo">082</span> // Assert that all the strings are equal to the fist.<a name="line.82"></a> |
| <span class="sourceLineNo">083</span> for (String s : resultStrings) {<a name="line.83"></a> |
| <span class="sourceLineNo">084</span> assertEquals(firstString, s);<a name="line.84"></a> |
| <span class="sourceLineNo">085</span> }<a name="line.85"></a> |
| <span class="sourceLineNo">086</span><a name="line.86"></a> |
| <span class="sourceLineNo">087</span> // an assert to make sure that RandomStringGeneratorImpl is generating random strings.<a name="line.87"></a> |
| <span class="sourceLineNo">088</span> assertNotEquals(new RandomStringGeneratorImpl().getRandString(), firstString);<a name="line.88"></a> |
| <span class="sourceLineNo">089</span> }<a name="line.89"></a> |
| <span class="sourceLineNo">090</span>}<a name="line.90"></a> |
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