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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;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import static org.junit.Assert.assertEquals;</span> |
| <span class="source-line-no">021</span><span id="line-21">import static org.junit.Assert.assertNotEquals;</span> |
| <span class="source-line-no">022</span><span id="line-22"></span> |
| <span class="source-line-no">023</span><span id="line-23">import java.util.ArrayList;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.util.List;</span> |
| <span class="source-line-no">025</span><span id="line-25">import java.util.concurrent.Callable;</span> |
| <span class="source-line-no">026</span><span id="line-26">import java.util.concurrent.ExecutorService;</span> |
| <span class="source-line-no">027</span><span id="line-27">import java.util.concurrent.Executors;</span> |
| <span class="source-line-no">028</span><span id="line-28">import java.util.concurrent.Future;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.testclassification.MetricsTests;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.testclassification.SmallTests;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.junit.ClassRule;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.junit.Test;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.junit.experimental.categories.Category;</span> |
| <span class="source-line-no">034</span><span id="line-34"></span> |
| <span class="source-line-no">035</span><span id="line-35">@Category({ MetricsTests.class, SmallTests.class })</span> |
| <span class="source-line-no">036</span><span id="line-36">public class TestCompatibilitySingletonFactory {</span> |
| <span class="source-line-no">037</span><span id="line-37"></span> |
| <span class="source-line-no">038</span><span id="line-38"> @ClassRule</span> |
| <span class="source-line-no">039</span><span id="line-39"> public static final HBaseClassTestRule CLASS_RULE =</span> |
| <span class="source-line-no">040</span><span id="line-40"> HBaseClassTestRule.forClass(TestCompatibilitySingletonFactory.class);</span> |
| <span class="source-line-no">041</span><span id="line-41"></span> |
| <span class="source-line-no">042</span><span id="line-42"> private static final int ITERATIONS = 100000;</span> |
| <span class="source-line-no">043</span><span id="line-43"></span> |
| <span class="source-line-no">044</span><span id="line-44"> private static class TestCompatibilitySingletonFactoryCallable implements Callable<String> {</span> |
| <span class="source-line-no">045</span><span id="line-45"></span> |
| <span class="source-line-no">046</span><span id="line-46"> @Override</span> |
| <span class="source-line-no">047</span><span id="line-47"> public String call() throws Exception {</span> |
| <span class="source-line-no">048</span><span id="line-48"> // XXX: Why is this sleep here?</span> |
| <span class="source-line-no">049</span><span id="line-49"> Thread.sleep(10);</span> |
| <span class="source-line-no">050</span><span id="line-50"> RandomStringGenerator instance =</span> |
| <span class="source-line-no">051</span><span id="line-51"> CompatibilitySingletonFactory.getInstance(RandomStringGenerator.class);</span> |
| <span class="source-line-no">052</span><span id="line-52"> return instance.getRandString();</span> |
| <span class="source-line-no">053</span><span id="line-53"> }</span> |
| <span class="source-line-no">054</span><span id="line-54"> }</span> |
| <span class="source-line-no">055</span><span id="line-55"></span> |
| <span class="source-line-no">056</span><span id="line-56"> @Test</span> |
| <span class="source-line-no">057</span><span id="line-57"> public void testGetInstance() throws Exception {</span> |
| <span class="source-line-no">058</span><span id="line-58"> List<TestCompatibilitySingletonFactoryCallable> callables = new ArrayList<>(ITERATIONS);</span> |
| <span class="source-line-no">059</span><span id="line-59"> List<String> resultStrings = new ArrayList<>(ITERATIONS);</span> |
| <span class="source-line-no">060</span><span id="line-60"></span> |
| <span class="source-line-no">061</span><span id="line-61"> // Create the callables.</span> |
| <span class="source-line-no">062</span><span id="line-62"> for (int i = 0; i < ITERATIONS; i++) {</span> |
| <span class="source-line-no">063</span><span id="line-63"> callables.add(new TestCompatibilitySingletonFactoryCallable());</span> |
| <span class="source-line-no">064</span><span id="line-64"> }</span> |
| <span class="source-line-no">065</span><span id="line-65"></span> |
| <span class="source-line-no">066</span><span id="line-66"> // Now run the callables.</span> |
| <span class="source-line-no">067</span><span id="line-67"> ExecutorService executorService = Executors.newFixedThreadPool(100);</span> |
| <span class="source-line-no">068</span><span id="line-68"> List<Future<String>> futures = executorService.invokeAll(callables);</span> |
| <span class="source-line-no">069</span><span id="line-69"></span> |
| <span class="source-line-no">070</span><span id="line-70"> // Wait for them all to finish.</span> |
| <span class="source-line-no">071</span><span id="line-71"> for (Future<String> f : futures) {</span> |
| <span class="source-line-no">072</span><span id="line-72"> resultStrings.add(f.get());</span> |
| <span class="source-line-no">073</span><span id="line-73"> }</span> |
| <span class="source-line-no">074</span><span id="line-74"></span> |
| <span class="source-line-no">075</span><span id="line-75"> // Get the first string.</span> |
| <span class="source-line-no">076</span><span id="line-76"> String firstString = resultStrings.get(0);</span> |
| <span class="source-line-no">077</span><span id="line-77"></span> |
| <span class="source-line-no">078</span><span id="line-78"> // Assert that all the strings are equal to the fist.</span> |
| <span class="source-line-no">079</span><span id="line-79"> for (String s : resultStrings) {</span> |
| <span class="source-line-no">080</span><span id="line-80"> assertEquals(firstString, s);</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"> // an assert to make sure that RandomStringGeneratorImpl is generating random strings.</span> |
| <span class="source-line-no">084</span><span id="line-84"> assertNotEquals(new RandomStringGeneratorImpl().getRandString(), firstString);</span> |
| <span class="source-line-no">085</span><span id="line-85"> }</span> |
| <span class="source-line-no">086</span><span id="line-86">}</span> |
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