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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=ISO-8859-1" /><title>PoolUtils xref</title><link type="text/css" rel="stylesheet" href="../../../../stylesheet.css" /></head><body><div id="overview"><a href="../../../../../apidocs/org/apache/commons/pool/PoolUtils.html">View Javadoc</a></div><pre><a name="1" href="#1">1</a> <em class="comment">/*</em><a name="2" href="#2">2</a> <em class="comment"> * Copyright 2006 The Apache Software Foundation.</em><a name="3" href="#3">3</a> <em class="comment"> *</em><a name="4" href="#4">4</a> <em class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</em><a name="5" href="#5">5</a> <em class="comment"> * you may not use this file except in compliance with the License.</em><a name="6" href="#6">6</a> <em class="comment"> * You may obtain a copy of the License at</em><a name="7" href="#7">7</a> <em class="comment"> *</em><a name="8" href="#8">8</a> <em class="comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em><a name="9" href="#9">9</a> <em class="comment"> *</em><a name="10" href="#10">10</a> <em class="comment"> * Unless required by applicable law or agreed to in writing, software</em><a name="11" href="#11">11</a> <em class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em><a name="12" href="#12">12</a> <em class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em><a name="13" href="#13">13</a> <em class="comment"> * See the License for the specific language governing permissions and</em><a name="14" href="#14">14</a> <em class="comment"> * limitations under the License.</em><a name="15" href="#15">15</a> <em class="comment"> */</em><a name="16" href="#16">16</a> <a name="17" href="#17">17</a> <strong>package</strong> <a href="../../../../org/apache/commons/pool/package-summary.html">org.apache.commons.pool</a>;<a name="18" href="#18">18</a> <a name="19" href="#19">19</a> <strong>import</strong> java.util.Collection;<a name="20" href="#20">20</a> <strong>import</strong> java.util.HashMap;<a name="21" href="#21">21</a> <strong>import</strong> java.util.Iterator;<a name="22" href="#22">22</a> <strong>import</strong> java.util.Map;<a name="23" href="#23">23</a> <strong>import</strong> java.util.NoSuchElementException;<a name="24" href="#24">24</a> <strong>import</strong> java.util.Timer;<a name="25" href="#25">25</a> <strong>import</strong> java.util.TimerTask;<a name="26" href="#26">26</a> <a name="27" href="#27">27</a> <em>/**<em>*</em></em><a name="28" href="#28">28</a> <em> * This class consists exclusively of static methods that operate on or return keyedPool related interfaces.</em><a name="29" href="#29">29</a> <em> *</em><a name="30" href="#30">30</a> <em> * @author Sandy McArthur</em><a name="31" href="#31">31</a> <em> * @version $Revision: 385296 $ $Date: 2006-03-12 10:28:08 -0500 (Sun, 12 Mar 2006) $</em><a name="32" href="#32">32</a> <em> * @since Pool 1.3</em><a name="33" href="#33">33</a> <em> */</em><a name="34" href="#34">34</a> <strong>public</strong> <strong>final</strong> <strong>class</strong> <a href="../../../../org/apache/commons/pool/PoolUtils.html">PoolUtils</a> {<a name="35" href="#35">35</a> <a name="36" href="#36">36</a> <em>/**<em>*</em></em><a name="37" href="#37">37</a> <em> * Timer used to periodically check pools idle object count.</em><a name="38" href="#38">38</a> <em> * Because a {@link Timer} creates a {@link Thread} this is lazily instantiated.</em><a name="39" href="#39">39</a> <em> */</em><a name="40" href="#40">40</a> <strong>private</strong> <strong>static</strong> Timer MIN_IDLE_TIMER;<a name="41" href="#41">41</a> <a name="42" href="#42">42</a> <em>/**<em>*</em></em><a name="43" href="#43">43</a> <em> * PoolUtils instances should NOT be constructed in standard programming.</em><a name="44" href="#44">44</a> <em> * Instead, the class should be used procedurally: PoolUtils.adapt(aPool);.</em><a name="45" href="#45">45</a> <em> * This constructor is public to permit tools that require a JavaBean instance to operate.</em><a name="46" href="#46">46</a> <em> */</em><a name="47" href="#47">47</a> <strong>public</strong> <a href="../../../../org/apache/commons/pool/PoolUtils.html">PoolUtils</a>() {<a name="48" href="#48">48</a> }<a name="49" href="#49">49</a> <a name="50" href="#50">50</a> <em>/**<em>*</em></em><a name="51" href="#51">51</a> <em> * Adapt a <code>KeyedPoolableObjectFactory</code> instance to work where a <code>PoolableObjectFactory</code> is</em><a name="52" href="#52">52</a> <em> * needed. This method is the equivalent of calling</em><a name="53" href="#53">53</a> <em> * {@link #adapt(KeyedPoolableObjectFactory, Object) PoolUtils.adapt(aKeyedPoolableObjectFactory, new Object())}.</em><a name="54" href="#54">54</a> <em> *</em><a name="55" href="#55">55</a> <em> * @param keyedFactory the {@link KeyedPoolableObjectFactory} to delegate to.</em><a name="56" href="#56">56</a> <em> * @return a {@link PoolableObjectFactory} that delegates to <code>keyedFactory</code> with an internal key.</em><a name="57" href="#57">57</a> <em> * @throws IllegalArgumentException when <code>keyedFactory</code> is <code>null</code>.</em><a name="58" href="#58">58</a> <em> * @see #adapt(KeyedPoolableObjectFactory, Object)</em><a name="59" href="#59">59</a> <em> * @since Pool 1.3</em><a name="60" href="#60">60</a> <em> */</em><a name="61" href="#61">61</a> <strong>public</strong> <strong>static</strong> <a href="../../../../org/apache/commons/pool/PoolableObjectFactory.html">PoolableObjectFactory</a> adapt(<strong>final</strong> <a href="../../../../org/apache/commons/pool/KeyedPoolableObjectFactory.html">KeyedPoolableObjectFactory</a> keyedFactory) throws IllegalArgumentException {<a name="62" href="#62">62</a> <strong>return</strong> adapt(keyedFactory, <strong>new</strong> Object());<a name="63" href="#63">63</a> }<a name="64" href="#64">64</a> <a name="65" href="#65">65</a> <em>/**<em>*</em></em><a name="66" href="#66">66</a> <em> * Adapt a <code>KeyedPoolableObjectFactory</code> instance to work where a <code>PoolableObjectFactory</code> is</em><a name="67" href="#67">67</a> <em> * needed using the specified <code>key</code> when delegating.</em><a name="68" href="#68">68</a> <em> *</em><a name="69" href="#69">69</a> <em> * @param keyedFactory the {@link KeyedPoolableObjectFactory} to delegate to.</em><a name="70" href="#70">70</a> <em> * @param key the key to use when delegating.</em><a name="71" href="#71">71</a> <em> * @return a {@link PoolableObjectFactory} that delegates to <code>keyedFactory</code> with the specified key.</em><a name="72" href="#72">72</a> <em> * @throws IllegalArgumentException when <code>keyedFactory</code> or <code>key</code> is <code>null</code>.</em><a name="73" href="#73">73</a> <em> * @see #adapt(KeyedPoolableObjectFactory)</em><a name="74" href="#74">74</a> <em> * @since Pool 1.3</em><a name="75" href="#75">75</a> <em> */</em><a name="76" href="#76">76</a> <strong>public</strong> <strong>static</strong> <a href="../../../../org/apache/commons/pool/PoolableObjectFactory.html">PoolableObjectFactory</a> adapt(<strong>final</strong> <a href="../../../../org/apache/commons/pool/KeyedPoolableObjectFactory.html">KeyedPoolableObjectFactory</a> keyedFactory, <strong>final</strong> Object key) throws IllegalArgumentException {<a name="77" href="#77">77</a> <strong>return</strong> <strong>new</strong> PoolableObjectFactoryAdaptor(keyedFactory, key);<a name="78" href="#78">78</a> }<a name="79" href="#79">79</a> <a name="80" href="#80">80</a> <em>/**<em>*</em></em><a name="81" href="#81">81</a> <em> * Adapt a <code>PoolableObjectFactory</code> instance to work where a <code>KeyedPoolableObjectFactory</code> is</em><a name="82" href="#82">82</a> <em> * needed. The key is ignored.</em><a name="83" href="#83">83</a> <em> *</em><a name="84" href="#84">84</a> <em> * @param factory the {@link PoolableObjectFactory} to delegate to.</em><a name="85" href="#85">85</a> <em> * @return a {@link KeyedPoolableObjectFactory} that delegates to <code>factory</code> ignoring the key.</em><a name="86" href="#86">86</a> <em> * @throws IllegalArgumentException when <code>factory</code> is <code>null</code>.</em><a name="87" href="#87">87</a> <em> * @since Pool 1.3</em><a name="88" href="#88">88</a> <em> */</em><a name="89" href="#89">89</a> <strong>public</strong> <strong>static</strong> <a href="../../../../org/apache/commons/pool/KeyedPoolableObjectFactory.html">KeyedPoolableObjectFactory</a> adapt(<strong>final</strong> <a href="../../../../org/apache/commons/pool/PoolableObjectFactory.html">PoolableObjectFactory</a> factory) throws IllegalArgumentException {<a name="90" href="#90">90</a> <strong>return</strong> <strong>new</strong> KeyedPoolableObjectFactoryAdaptor(factory);<a name="91" href="#91">91</a> }<a name="92" href="#92">92</a> <a name="93" href="#93">93</a> <em>/**<em>*</em></em><a name="94" href="#94">94</a> <em> * Adapt a <code>KeyedObjectPool</code> instance to work where an <code>ObjectPool</code> is needed. This is the</em><a name="95" href="#95">95</a> <em> * equivalent of calling {@link #adapt(KeyedObjectPool, Object) PoolUtils.adapt(aKeyedObjectPool, new Object())}.</em><a name="96" href="#96">96</a> <em> *</em><a name="97" href="#97">97</a> <em> * @param keyedPool the {@link KeyedObjectPool} to delegate to.</em><a name="98" href="#98">98</a> <em> * @return an {@link ObjectPool} that delegates to <code>keyedPool</code> with an internal key.</em><a name="99" href="#99">99</a> <em> * @throws IllegalArgumentException when <code>keyedPool</code> is <code>null</code>.</em><a name="100" href="#100">100</a> <em> * @see #adapt(KeyedObjectPool, Object)</em><a name="101" href="#101">101</a> <em> * @since Pool 1.3</em><a name="102" href="#102">102</a> <em> */</em><a name="103" href="#103">103</a> <strong>public</strong> <strong>static</strong> <a href="../../../../org/apache/commons/pool/ObjectPool.html">ObjectPool</a> adapt(<strong>final</strong> <a href="../../../../org/apache/commons/pool/KeyedObjectPool.html">KeyedObjectPool</a> keyedPool) throws IllegalArgumentException {<a name="104" href="#104">104</a> <strong>return</strong> adapt(keyedPool, <strong>new</strong> Object());<a name="105" href="#105">105</a> }<a name="106" href="#106">106</a> <a name="107" href="#107">107</a> <em>/**<em>*</em></em><a name="108" href="#108">108</a> <em> * Adapt a <code>KeyedObjectPool</code> instance to work where an <code>ObjectPool</code> is needed using the</em><a name="109" href="#109">109</a> <em> * specified <code>key</code> when delegating.</em><a name="110" href="#110">110</a> <em> *</em><a name="111" href="#111">111</a> <em> * @param keyedPool the {@link KeyedObjectPool} to delegate to.</em><a name="112" href="#112">112</a> <em> * @param key the key to use when delegating.</em><a name="113" href="#113">113</a> <em> * @return an {@link ObjectPool} that delegates to <code>keyedPool</code> with the specified key.</em><a name="114" href="#114">114</a> <em> * @throws IllegalArgumentException when <code>keyedPool</code> or <code>key</code> is <code>null</code>.</em><a name="115" href="#115">115</a> <em> * @see #adapt(KeyedObjectPool)</em><a name="116" href="#116">116</a> <em> * @since Pool 1.3</em><a name="117" href="#117">117</a> <em> */</em><a name="118" href="#118">118</a> <strong>public</strong> <strong>static</strong> <a href="../../../../org/apache/commons/pool/ObjectPool.html">ObjectPool</a> adapt(<strong>final</strong> <a href="../../../../org/apache/commons/pool/KeyedObjectPool.html">KeyedObjectPool</a> keyedPool, <strong>final</strong> Object key) throws IllegalArgumentException {<a name="119" href="#119">119</a> <strong>return</strong> <strong>new</strong> ObjectPoolAdaptor(keyedPool, key);<a name="120" href="#120">120</a> }<a name="121" href="#121">121</a> <a name="122" href="#122">122</a> <em>/**<em>*</em></em><a name="123" href="#123">123</a> <em> * Adapt an <code>ObjectPool</code> to work where an <code>KeyedObjectPool</code> is needed.</em><a name="124" href="#124">124</a> <em> * The key is ignored.</em>⌨️ 快捷键说明
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