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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head><meta http-equiv="content-type" content="text/html; charset=UTF-8" /><title>FairGenericObjectPoolTest xref</title><link type="text/css" rel="stylesheet" href="../../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../../apidocs/org/apache/commons/pool/impl/FairGenericObjectPoolTest.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*<em class="comment"> FairGenericObjectPoolTest</em></em><a name="2" href="#2">2</a> <em class="comment">*</em><a name="3" href="#3">3</a> <em class="comment">* $Id: FairGenericObjectPoolTest.java,v 1.2 2006/05/16 16:16:07 gojomo Exp $</em><a name="4" href="#4">4</a> <em class="comment">*</em><a name="5" href="#5">5</a> <em class="comment">* Created on Apr 7, 2006</em><a name="6" href="#6">6</a> <em class="comment">*</em><a name="7" href="#7">7</a> <em class="comment">* Copyright (C) 2006 Internet Archive.</em><a name="8" href="#8">8</a> <em class="comment">*</em><a name="9" href="#9">9</a> <em class="comment">*/</em> <a name="10" href="#10">10</a> <strong>package</strong> <a href="../../../../../org/apache/commons/pool/impl/package-summary.html">org.apache.commons.pool.impl</a>;<a name="11" href="#11">11</a> <a name="12" href="#12">12</a> <strong>import</strong> java.util.Arrays;<a name="13" href="#13">13</a> <strong>import</strong> java.util.Collections;<a name="14" href="#14">14</a> <strong>import</strong> java.util.LinkedList;<a name="15" href="#15">15</a> <strong>import</strong> java.util.List;<a name="16" href="#16">16</a> <a name="17" href="#17">17</a> <strong>import</strong> junit.framework.TestCase;<a name="18" href="#18">18</a> <a name="19" href="#19">19</a> <strong>import</strong> org.apache.commons.pool.BasePoolableObjectFactory;<a name="20" href="#20">20</a> <a name="21" href="#21">21</a> <em>/**<em>*</em></em><a name="22" href="#22">22</a> <em> * Test for FairGenericObjectPool.</em><a name="23" href="#23">23</a> <em> * </em><a name="24" href="#24">24</a> <em> * @author gojomo</em><a name="25" href="#25">25</a> <em> */</em><a name="26" href="#26">26</a> <strong>public</strong> <strong>class</strong> <a href="../../../../../org/apache/commons/pool/impl/FairGenericObjectPoolTest.html">FairGenericObjectPoolTest</a> <strong>extends</strong> TestCase {<a name="27" href="#27">27</a> <em class="comment">// public void testUnfair() throws InterruptedException {</em><a name="28" href="#28">28</a> <em class="comment">//// System.out.println("unfair");</em><a name="29" href="#29">29</a> <em class="comment">// GenericObjectPool pool = new GenericObjectPool();</em><a name="30" href="#30">30</a> <em class="comment">// </em><a name="31" href="#31">31</a> <em class="comment">// Object[] borrowOrder = tryPool(pool);</em><a name="32" href="#32">32</a> <em class="comment">// </em><a name="33" href="#33">33</a> <em class="comment">// Object[] sortedOrder = (Object[]) borrowOrder.clone();</em><a name="34" href="#34">34</a> <em class="comment">// Arrays.sort(sortedOrder);</em><a name="35" href="#35">35</a> <em class="comment">// assertFalse("unexpectedly fair", Arrays.equals(borrowOrder,sortedOrder));</em><a name="36" href="#36">36</a> <em class="comment">// }</em><a name="37" href="#37">37</a> <a name="38" href="#38">38</a> <strong>public</strong> <strong>void</strong> testFair() throws InterruptedException {<a name="39" href="#39">39</a> <em class="comment">// System.out.println("fair");</em><a name="40" href="#40">40</a> <a href="../../../../../org/apache/commons/pool/impl/GenericObjectPool.html">GenericObjectPool</a> pool = <strong>new</strong> <a href="../../../../../org/apache/commons/pool/impl/FairGenericObjectPool.html">FairGenericObjectPool</a>();<a name="41" href="#41">41</a> <a name="42" href="#42">42</a> Object[] borrowOrder = tryPool(pool);<a name="43" href="#43">43</a> <a name="44" href="#44">44</a> Object[] sortedOrder = (Object[]) borrowOrder.clone();<a name="45" href="#45">45</a> Arrays.sort(sortedOrder);<a name="46" href="#46">46</a> assertTrue(<span class="string">"unexpectedly unfair"</span>, Arrays.equals(borrowOrder,sortedOrder));<a name="47" href="#47">47</a> }<a name="48" href="#48">48</a> <a name="49" href="#49">49</a> <em>/**<em>*</em></em><a name="50" href="#50">50</a> <em> * Test the given pool for fairness. </em><a name="51" href="#51">51</a> <em> * </em><a name="52" href="#52">52</a> <em> * @param pool GenericObjectPool to test</em><a name="53" href="#53">53</a> <em> * @throws InterruptedException</em><a name="54" href="#54">54</a> <em> */</em><a name="55" href="#55">55</a> <strong>private</strong> Object[] tryPool(<a href="../../../../../org/apache/commons/pool/impl/GenericObjectPool.html">GenericObjectPool</a> pool) throws InterruptedException {<a name="56" href="#56">56</a> BlockerObjectFactory factory = <strong>new</strong> BlockerObjectFactory();<a name="57" href="#57">57</a> pool.setFactory(factory);<a name="58" href="#58">58</a> pool.setMaxActive(1);<a name="59" href="#59">59</a> List borrowOrder = Collections.synchronizedList(<strong>new</strong> LinkedList());<a name="60" href="#60">60</a> <strong>for</strong>(<strong>int</strong> i = 0; i < 10; i++) {<a name="61" href="#61">61</a> Contender c = <strong>new</strong> Contender(borrowOrder);<a name="62" href="#62">62</a> c.pool = pool;<a name="63" href="#63">63</a> c.ordinal = i;<a name="64" href="#64">64</a> (<strong>new</strong> Thread(c)).start();<a name="65" href="#65">65</a> Thread.sleep(500);<a name="66" href="#66">66</a> }<a name="67" href="#67">67</a> factory.single.release();<a name="68" href="#68">68</a> Thread.sleep(5000);<a name="69" href="#69">69</a> <strong>return</strong> borrowOrder.toArray();<a name="70" href="#70">70</a> }<a name="71" href="#71">71</a> <a name="72" href="#72">72</a> <strong>class</strong> Contender implements Runnable {<a name="73" href="#73">73</a> <strong>public</strong> <a href="../../../../../org/apache/commons/pool/impl/GenericObjectPool.html">GenericObjectPool</a> pool;<a name="74" href="#74">74</a> <strong>public</strong> <strong>int</strong> ordinal;<a name="75" href="#75">75</a> <strong>public</strong> List reportList; <a name="76" href="#76">76</a> <a name="77" href="#77">77</a> <strong>public</strong> Contender(List borrowOrder) {<a name="78" href="#78">78</a> reportList = borrowOrder;<a name="79" href="#79">79</a> }<a name="80" href="#80">80</a> <a name="81" href="#81">81</a> <strong>public</strong> <strong>void</strong> run() {<a name="82" href="#82">82</a> <strong>try</strong> {<a name="83" href="#83">83</a> Blocker block = (Blocker) pool.borrowObject();<a name="84" href="#84">84</a> System.out.println(<span class="string">"borrowed #"</span>+ordinal);<a name="85" href="#85">85</a> reportList.add(<strong>new</strong> Integer(ordinal));<a name="86" href="#86">86</a> block.acquire();<a name="87" href="#87">87</a> System.out.println(<span class="string">"returning #"</span>+ordinal);<a name="88" href="#88">88</a> pool.returnObject(block);<a name="89" href="#89">89</a> } <strong>catch</strong> (Exception e) {<a name="90" href="#90">90</a> <strong>throw</strong> <strong>new</strong> RuntimeException(e);<a name="91" href="#91">91</a> } <a name="92" href="#92">92</a> }<a name="93" href="#93">93</a> <a name="94" href="#94">94</a> }<a name="95" href="#95">95</a> <a name="96" href="#96">96</a> <strong>class</strong> BlockerObjectFactory <strong>extends</strong> BasePoolableObjectFactory {<a name="97" href="#97">97</a> <strong>public</strong> Blocker single = <strong>new</strong> Blocker();<a name="98" href="#98">98</a> <strong>public</strong> Object makeObject() throws Exception {<a name="99" href="#99">99</a> System.out.println(<span class="string">"makeObject"</span>);<a name="100" href="#100">100</a> <strong>return</strong> single;<a name="101" href="#101">101</a> }<a name="102" href="#102">102</a> }<a name="103" href="#103">103</a> <a name="104" href="#104">104</a> <strong>class</strong> Blocker {<a name="105" href="#105">105</a> <strong>boolean</strong> block = <strong>true</strong>;<a name="106" href="#106">106</a> <strong>public</strong> <strong>synchronized</strong> <strong>void</strong> acquire() {<a name="107" href="#107">107</a> <em class="comment">// only block first time through</em><a name="108" href="#108">108</a> <strong>if</strong>(block) {<a name="109" href="#109">109</a> <strong>try</strong> {<a name="110" href="#110">110</a> wait();<a name="111" href="#111">111</a> } <strong>catch</strong> (InterruptedException e) {<a name="112" href="#112">112</a> <strong>throw</strong> <strong>new</strong> RuntimeException(e);<a name="113" href="#113">113</a> }<a name="114" href="#114">114</a> }<a name="115" href="#115">115</a> block = false; <a name="116" href="#116">116</a> }<a name="117" href="#117">117</a> <strong>public</strong> <strong>synchronized</strong> <strong>void</strong> release() {<a name="118" href="#118">118</a> notifyAll();<a name="119" href="#119">119</a> }<a name="120" href="#120">120</a> }<a name="121" href="#121">121</a> }</pre><hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body></html>⌨️ 快捷键说明
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