You are viewing a plain text version of this content. The canonical link for it is here.
Posted to notifications@commons.apache.org by ps...@apache.org on 2015/06/01 00:24:05 UTC

svn commit: r953350 [27/37] - in /websites/production/commons/content/proper/commons-pool: api-2.4.1/ api-2.4.1/org/ api-2.4.1/org/apache/ api-2.4.1/org/apache/commons/ api-2.4.1/org/apache/commons/pool2/ api-2.4.1/org/apache/commons/pool2/class-use/ a...

Added: websites/production/commons/content/proper/commons-pool/api-2.4.1/src-html/org/apache/commons/pool2/PoolUtils.html
==============================================================================
--- websites/production/commons/content/proper/commons-pool/api-2.4.1/src-html/org/apache/commons/pool2/PoolUtils.html (added)
+++ websites/production/commons/content/proper/commons-pool/api-2.4.1/src-html/org/apache/commons/pool2/PoolUtils.html Sun May 31 22:24:03 2015
@@ -0,0 +1,1875 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<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 or more<a name="line.2"></a>
+<span class="sourceLineNo">003</span> * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
+<span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
+<span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
+<span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
+<span class="sourceLineNo">007</span> * the License.  You may obtain a copy of the License at<a name="line.7"></a>
+<span class="sourceLineNo">008</span> *<a name="line.8"></a>
+<span class="sourceLineNo">009</span> *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
+<span class="sourceLineNo">010</span> *<a name="line.10"></a>
+<span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
+<span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
+<span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
+<span class="sourceLineNo">014</span> * See the License for the specific language governing permissions and<a name="line.14"></a>
+<span class="sourceLineNo">015</span> * limitations under the License.<a name="line.15"></a>
+<span class="sourceLineNo">016</span> */<a name="line.16"></a>
+<span class="sourceLineNo">017</span>package org.apache.commons.pool2;<a name="line.17"></a>
+<span class="sourceLineNo">018</span><a name="line.18"></a>
+<span class="sourceLineNo">019</span>import java.util.Collection;<a name="line.19"></a>
+<span class="sourceLineNo">020</span>import java.util.HashMap;<a name="line.20"></a>
+<span class="sourceLineNo">021</span>import java.util.Iterator;<a name="line.21"></a>
+<span class="sourceLineNo">022</span>import java.util.Map;<a name="line.22"></a>
+<span class="sourceLineNo">023</span>import java.util.NoSuchElementException;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import java.util.Timer;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import java.util.TimerTask;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import java.util.Collections;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import java.util.concurrent.locks.ReentrantReadWriteLock;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import java.util.concurrent.locks.ReentrantReadWriteLock.ReadLock;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock;<a name="line.29"></a>
+<span class="sourceLineNo">030</span><a name="line.30"></a>
+<span class="sourceLineNo">031</span>/**<a name="line.31"></a>
+<span class="sourceLineNo">032</span> * This class consists exclusively of static methods that operate on or return<a name="line.32"></a>
+<span class="sourceLineNo">033</span> * ObjectPool or KeyedObjectPool related interfaces.<a name="line.33"></a>
+<span class="sourceLineNo">034</span> *<a name="line.34"></a>
+<span class="sourceLineNo">035</span> * @version $Revision: 1566584 $<a name="line.35"></a>
+<span class="sourceLineNo">036</span> *<a name="line.36"></a>
+<span class="sourceLineNo">037</span> * @since 2.0<a name="line.37"></a>
+<span class="sourceLineNo">038</span> */<a name="line.38"></a>
+<span class="sourceLineNo">039</span>public final class PoolUtils {<a name="line.39"></a>
+<span class="sourceLineNo">040</span><a name="line.40"></a>
+<span class="sourceLineNo">041</span>    /**<a name="line.41"></a>
+<span class="sourceLineNo">042</span>     * Timer used to periodically check pools idle object count. Because a<a name="line.42"></a>
+<span class="sourceLineNo">043</span>     * {@link Timer} creates a {@link Thread}, an IODH is used.<a name="line.43"></a>
+<span class="sourceLineNo">044</span>     */<a name="line.44"></a>
+<span class="sourceLineNo">045</span>    static class TimerHolder {<a name="line.45"></a>
+<span class="sourceLineNo">046</span>        static final Timer MIN_IDLE_TIMER = new Timer(true);<a name="line.46"></a>
+<span class="sourceLineNo">047</span>    }<a name="line.47"></a>
+<span class="sourceLineNo">048</span><a name="line.48"></a>
+<span class="sourceLineNo">049</span>    /**<a name="line.49"></a>
+<span class="sourceLineNo">050</span>     * PoolUtils instances should NOT be constructed in standard programming.<a name="line.50"></a>
+<span class="sourceLineNo">051</span>     * Instead, the class should be used procedurally: PoolUtils.adapt(aPool);.<a name="line.51"></a>
+<span class="sourceLineNo">052</span>     * This constructor is public to permit tools that require a JavaBean<a name="line.52"></a>
+<span class="sourceLineNo">053</span>     * instance to operate.<a name="line.53"></a>
+<span class="sourceLineNo">054</span>     */<a name="line.54"></a>
+<span class="sourceLineNo">055</span>    public PoolUtils() {<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>    /**<a name="line.58"></a>
+<span class="sourceLineNo">059</span>     * Should the supplied Throwable be re-thrown (eg if it is an instance of<a name="line.59"></a>
+<span class="sourceLineNo">060</span>     * one of the Throwables that should never be swallowed). Used by the pool<a name="line.60"></a>
+<span class="sourceLineNo">061</span>     * error handling for operations that throw exceptions that normally need to<a name="line.61"></a>
+<span class="sourceLineNo">062</span>     * be ignored.<a name="line.62"></a>
+<span class="sourceLineNo">063</span>     *<a name="line.63"></a>
+<span class="sourceLineNo">064</span>     * @param t<a name="line.64"></a>
+<span class="sourceLineNo">065</span>     *            The Throwable to check<a name="line.65"></a>
+<span class="sourceLineNo">066</span>     * @throws ThreadDeath<a name="line.66"></a>
+<span class="sourceLineNo">067</span>     *             if that is passed in<a name="line.67"></a>
+<span class="sourceLineNo">068</span>     * @throws VirtualMachineError<a name="line.68"></a>
+<span class="sourceLineNo">069</span>     *             if that is passed in<a name="line.69"></a>
+<span class="sourceLineNo">070</span>     */<a name="line.70"></a>
+<span class="sourceLineNo">071</span>    public static void checkRethrow(Throwable t) {<a name="line.71"></a>
+<span class="sourceLineNo">072</span>        if (t instanceof ThreadDeath) {<a name="line.72"></a>
+<span class="sourceLineNo">073</span>            throw (ThreadDeath) t;<a name="line.73"></a>
+<span class="sourceLineNo">074</span>        }<a name="line.74"></a>
+<span class="sourceLineNo">075</span>        if (t instanceof VirtualMachineError) {<a name="line.75"></a>
+<span class="sourceLineNo">076</span>            throw (VirtualMachineError) t;<a name="line.76"></a>
+<span class="sourceLineNo">077</span>        }<a name="line.77"></a>
+<span class="sourceLineNo">078</span>        // All other instances of Throwable will be silently swallowed<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>    /**<a name="line.81"></a>
+<span class="sourceLineNo">082</span>     * Periodically check the idle object count for the pool. At most one idle<a name="line.82"></a>
+<span class="sourceLineNo">083</span>     * object will be added per period. If there is an exception when calling<a name="line.83"></a>
+<span class="sourceLineNo">084</span>     * {@link ObjectPool#addObject()} then no more checks will be performed.<a name="line.84"></a>
+<span class="sourceLineNo">085</span>     *<a name="line.85"></a>
+<span class="sourceLineNo">086</span>     * @param pool<a name="line.86"></a>
+<span class="sourceLineNo">087</span>     *            the pool to check periodically.<a name="line.87"></a>
+<span class="sourceLineNo">088</span>     * @param minIdle<a name="line.88"></a>
+<span class="sourceLineNo">089</span>     *            if the {@link ObjectPool#getNumIdle()} is less than this then<a name="line.89"></a>
+<span class="sourceLineNo">090</span>     *            add an idle object.<a name="line.90"></a>
+<span class="sourceLineNo">091</span>     * @param period<a name="line.91"></a>
+<span class="sourceLineNo">092</span>     *            the frequency to check the number of idle objects in a pool,<a name="line.92"></a>
+<span class="sourceLineNo">093</span>     *            see {@link Timer#schedule(TimerTask, long, long)}.<a name="line.93"></a>
+<span class="sourceLineNo">094</span>     * @param &lt;T&gt; the type of objects in the pool<a name="line.94"></a>
+<span class="sourceLineNo">095</span>     * @return the {@link TimerTask} that will periodically check the pools idle<a name="line.95"></a>
+<span class="sourceLineNo">096</span>     *         object count.<a name="line.96"></a>
+<span class="sourceLineNo">097</span>     * @throws IllegalArgumentException<a name="line.97"></a>
+<span class="sourceLineNo">098</span>     *             when &lt;code&gt;pool&lt;/code&gt; is &lt;code&gt;null&lt;/code&gt; or when<a name="line.98"></a>
+<span class="sourceLineNo">099</span>     *             &lt;code&gt;minIdle&lt;/code&gt; is negative or when &lt;code&gt;period&lt;/code&gt;<a name="line.99"></a>
+<span class="sourceLineNo">100</span>     *             isn't valid for {@link Timer#schedule(TimerTask, long, long)}<a name="line.100"></a>
+<span class="sourceLineNo">101</span>     */<a name="line.101"></a>
+<span class="sourceLineNo">102</span>    public static &lt;T&gt; TimerTask checkMinIdle(final ObjectPool&lt;T&gt; pool,<a name="line.102"></a>
+<span class="sourceLineNo">103</span>            final int minIdle, final long period)<a name="line.103"></a>
+<span class="sourceLineNo">104</span>            throws IllegalArgumentException {<a name="line.104"></a>
+<span class="sourceLineNo">105</span>        if (pool == null) {<a name="line.105"></a>
+<span class="sourceLineNo">106</span>            throw new IllegalArgumentException("keyedPool must not be null.");<a name="line.106"></a>
+<span class="sourceLineNo">107</span>        }<a name="line.107"></a>
+<span class="sourceLineNo">108</span>        if (minIdle &lt; 0) {<a name="line.108"></a>
+<span class="sourceLineNo">109</span>            throw new IllegalArgumentException("minIdle must be non-negative.");<a name="line.109"></a>
+<span class="sourceLineNo">110</span>        }<a name="line.110"></a>
+<span class="sourceLineNo">111</span>        final TimerTask task = new ObjectPoolMinIdleTimerTask&lt;T&gt;(pool, minIdle);<a name="line.111"></a>
+<span class="sourceLineNo">112</span>        getMinIdleTimer().schedule(task, 0L, period);<a name="line.112"></a>
+<span class="sourceLineNo">113</span>        return task;<a name="line.113"></a>
+<span class="sourceLineNo">114</span>    }<a name="line.114"></a>
+<span class="sourceLineNo">115</span><a name="line.115"></a>
+<span class="sourceLineNo">116</span>    /**<a name="line.116"></a>
+<span class="sourceLineNo">117</span>     * Periodically check the idle object count for the key in the keyedPool. At<a name="line.117"></a>
+<span class="sourceLineNo">118</span>     * most one idle object will be added per period. If there is an exception<a name="line.118"></a>
+<span class="sourceLineNo">119</span>     * when calling {@link KeyedObjectPool#addObject(Object)} then no more<a name="line.119"></a>
+<span class="sourceLineNo">120</span>     * checks for that key will be performed.<a name="line.120"></a>
+<span class="sourceLineNo">121</span>     *<a name="line.121"></a>
+<span class="sourceLineNo">122</span>     * @param keyedPool<a name="line.122"></a>
+<span class="sourceLineNo">123</span>     *            the keyedPool to check periodically.<a name="line.123"></a>
+<span class="sourceLineNo">124</span>     * @param key<a name="line.124"></a>
+<span class="sourceLineNo">125</span>     *            the key to check the idle count of.<a name="line.125"></a>
+<span class="sourceLineNo">126</span>     * @param minIdle<a name="line.126"></a>
+<span class="sourceLineNo">127</span>     *            if the {@link KeyedObjectPool#getNumIdle(Object)} is less than<a name="line.127"></a>
+<span class="sourceLineNo">128</span>     *            this then add an idle object.<a name="line.128"></a>
+<span class="sourceLineNo">129</span>     * @param period<a name="line.129"></a>
+<span class="sourceLineNo">130</span>     *            the frequency to check the number of idle objects in a<a name="line.130"></a>
+<span class="sourceLineNo">131</span>     *            keyedPool, see {@link Timer#schedule(TimerTask, long, long)}.<a name="line.131"></a>
+<span class="sourceLineNo">132</span>     * @param &lt;K&gt; the type of the pool key<a name="line.132"></a>
+<span class="sourceLineNo">133</span>     * @param &lt;V&gt; the type of pool entries<a name="line.133"></a>
+<span class="sourceLineNo">134</span>     * @return the {@link TimerTask} that will periodically check the pools idle<a name="line.134"></a>
+<span class="sourceLineNo">135</span>     *         object count.<a name="line.135"></a>
+<span class="sourceLineNo">136</span>     * @throws IllegalArgumentException<a name="line.136"></a>
+<span class="sourceLineNo">137</span>     *             when &lt;code&gt;keyedPool&lt;/code&gt;, &lt;code&gt;key&lt;/code&gt; is<a name="line.137"></a>
+<span class="sourceLineNo">138</span>     *             &lt;code&gt;null&lt;/code&gt; or when &lt;code&gt;minIdle&lt;/code&gt; is negative or<a name="line.138"></a>
+<span class="sourceLineNo">139</span>     *             when &lt;code&gt;period&lt;/code&gt; isn't valid for<a name="line.139"></a>
+<span class="sourceLineNo">140</span>     *             {@link Timer#schedule(TimerTask, long, long)}.<a name="line.140"></a>
+<span class="sourceLineNo">141</span>     */<a name="line.141"></a>
+<span class="sourceLineNo">142</span>    public static &lt;K, V&gt; TimerTask checkMinIdle(<a name="line.142"></a>
+<span class="sourceLineNo">143</span>            final KeyedObjectPool&lt;K, V&gt; keyedPool, final K key,<a name="line.143"></a>
+<span class="sourceLineNo">144</span>            final int minIdle, final long period)<a name="line.144"></a>
+<span class="sourceLineNo">145</span>            throws IllegalArgumentException {<a name="line.145"></a>
+<span class="sourceLineNo">146</span>        if (keyedPool == null) {<a name="line.146"></a>
+<span class="sourceLineNo">147</span>            throw new IllegalArgumentException("keyedPool must not be null.");<a name="line.147"></a>
+<span class="sourceLineNo">148</span>        }<a name="line.148"></a>
+<span class="sourceLineNo">149</span>        if (key == null) {<a name="line.149"></a>
+<span class="sourceLineNo">150</span>            throw new IllegalArgumentException("key must not be null.");<a name="line.150"></a>
+<span class="sourceLineNo">151</span>        }<a name="line.151"></a>
+<span class="sourceLineNo">152</span>        if (minIdle &lt; 0) {<a name="line.152"></a>
+<span class="sourceLineNo">153</span>            throw new IllegalArgumentException("minIdle must be non-negative.");<a name="line.153"></a>
+<span class="sourceLineNo">154</span>        }<a name="line.154"></a>
+<span class="sourceLineNo">155</span>        final TimerTask task = new KeyedObjectPoolMinIdleTimerTask&lt;K, V&gt;(<a name="line.155"></a>
+<span class="sourceLineNo">156</span>                keyedPool, key, minIdle);<a name="line.156"></a>
+<span class="sourceLineNo">157</span>        getMinIdleTimer().schedule(task, 0L, period);<a name="line.157"></a>
+<span class="sourceLineNo">158</span>        return task;<a name="line.158"></a>
+<span class="sourceLineNo">159</span>    }<a name="line.159"></a>
+<span class="sourceLineNo">160</span><a name="line.160"></a>
+<span class="sourceLineNo">161</span>    /**<a name="line.161"></a>
+<span class="sourceLineNo">162</span>     * Periodically check the idle object count for each key in the<a name="line.162"></a>
+<span class="sourceLineNo">163</span>     * &lt;code&gt;Collection&lt;/code&gt; &lt;code&gt;keys&lt;/code&gt; in the keyedPool. At most one<a name="line.163"></a>
+<span class="sourceLineNo">164</span>     * idle object will be added per period.<a name="line.164"></a>
+<span class="sourceLineNo">165</span>     *<a name="line.165"></a>
+<span class="sourceLineNo">166</span>     * @param keyedPool<a name="line.166"></a>
+<span class="sourceLineNo">167</span>     *            the keyedPool to check periodically.<a name="line.167"></a>
+<span class="sourceLineNo">168</span>     * @param keys<a name="line.168"></a>
+<span class="sourceLineNo">169</span>     *            a collection of keys to check the idle object count.<a name="line.169"></a>
+<span class="sourceLineNo">170</span>     * @param minIdle<a name="line.170"></a>
+<span class="sourceLineNo">171</span>     *            if the {@link KeyedObjectPool#getNumIdle(Object)} is less than<a name="line.171"></a>
+<span class="sourceLineNo">172</span>     *            this then add an idle object.<a name="line.172"></a>
+<span class="sourceLineNo">173</span>     * @param period<a name="line.173"></a>
+<span class="sourceLineNo">174</span>     *            the frequency to check the number of idle objects in a<a name="line.174"></a>
+<span class="sourceLineNo">175</span>     *            keyedPool, see {@link Timer#schedule(TimerTask, long, long)}.<a name="line.175"></a>
+<span class="sourceLineNo">176</span>     * @param &lt;K&gt; the type of the pool key<a name="line.176"></a>
+<span class="sourceLineNo">177</span>     * @param &lt;V&gt; the type of pool entries<a name="line.177"></a>
+<span class="sourceLineNo">178</span>     * @return a {@link Map} of key and {@link TimerTask} pairs that will<a name="line.178"></a>
+<span class="sourceLineNo">179</span>     *         periodically check the pools idle object count.<a name="line.179"></a>
+<span class="sourceLineNo">180</span>     * @throws IllegalArgumentException<a name="line.180"></a>
+<span class="sourceLineNo">181</span>     *             when &lt;code&gt;keyedPool&lt;/code&gt;, &lt;code&gt;keys&lt;/code&gt;, or any of the<a name="line.181"></a>
+<span class="sourceLineNo">182</span>     *             values in the collection is &lt;code&gt;null&lt;/code&gt; or when<a name="line.182"></a>
+<span class="sourceLineNo">183</span>     *             &lt;code&gt;minIdle&lt;/code&gt; is negative or when &lt;code&gt;period&lt;/code&gt;<a name="line.183"></a>
+<span class="sourceLineNo">184</span>     *             isn't valid for {@link Timer#schedule(TimerTask, long, long)}<a name="line.184"></a>
+<span class="sourceLineNo">185</span>     *             .<a name="line.185"></a>
+<span class="sourceLineNo">186</span>     * @see #checkMinIdle(KeyedObjectPool, Object, int, long)<a name="line.186"></a>
+<span class="sourceLineNo">187</span>     */<a name="line.187"></a>
+<span class="sourceLineNo">188</span>    public static &lt;K, V&gt; Map&lt;K, TimerTask&gt; checkMinIdle(<a name="line.188"></a>
+<span class="sourceLineNo">189</span>            final KeyedObjectPool&lt;K, V&gt; keyedPool, final Collection&lt;K&gt; keys,<a name="line.189"></a>
+<span class="sourceLineNo">190</span>            final int minIdle, final long period)<a name="line.190"></a>
+<span class="sourceLineNo">191</span>            throws IllegalArgumentException {<a name="line.191"></a>
+<span class="sourceLineNo">192</span>        if (keys == null) {<a name="line.192"></a>
+<span class="sourceLineNo">193</span>            throw new IllegalArgumentException("keys must not be null.");<a name="line.193"></a>
+<span class="sourceLineNo">194</span>        }<a name="line.194"></a>
+<span class="sourceLineNo">195</span>        final Map&lt;K, TimerTask&gt; tasks = new HashMap&lt;K, TimerTask&gt;(keys.size());<a name="line.195"></a>
+<span class="sourceLineNo">196</span>        final Iterator&lt;K&gt; iter = keys.iterator();<a name="line.196"></a>
+<span class="sourceLineNo">197</span>        while (iter.hasNext()) {<a name="line.197"></a>
+<span class="sourceLineNo">198</span>            final K key = iter.next();<a name="line.198"></a>
+<span class="sourceLineNo">199</span>            final TimerTask task = checkMinIdle(keyedPool, key, minIdle, period);<a name="line.199"></a>
+<span class="sourceLineNo">200</span>            tasks.put(key, task);<a name="line.200"></a>
+<span class="sourceLineNo">201</span>        }<a name="line.201"></a>
+<span class="sourceLineNo">202</span>        return tasks;<a name="line.202"></a>
+<span class="sourceLineNo">203</span>    }<a name="line.203"></a>
+<span class="sourceLineNo">204</span><a name="line.204"></a>
+<span class="sourceLineNo">205</span>    /**<a name="line.205"></a>
+<span class="sourceLineNo">206</span>     * Call &lt;code&gt;addObject()&lt;/code&gt; on &lt;code&gt;pool&lt;/code&gt; &lt;code&gt;count&lt;/code&gt;<a name="line.206"></a>
+<span class="sourceLineNo">207</span>     * number of times.<a name="line.207"></a>
+<span class="sourceLineNo">208</span>     *<a name="line.208"></a>
+<span class="sourceLineNo">209</span>     * @param pool<a name="line.209"></a>
+<span class="sourceLineNo">210</span>     *            the pool to prefill.<a name="line.210"></a>
+<span class="sourceLineNo">211</span>     * @param count<a name="line.211"></a>
+<span class="sourceLineNo">212</span>     *            the number of idle objects to add.<a name="line.212"></a>
+<span class="sourceLineNo">213</span>     * @param &lt;T&gt; the type of objects in the pool<a name="line.213"></a>
+<span class="sourceLineNo">214</span>     * @throws Exception<a name="line.214"></a>
+<span class="sourceLineNo">215</span>     *             when {@link ObjectPool#addObject()} fails.<a name="line.215"></a>
+<span class="sourceLineNo">216</span>     * @throws IllegalArgumentException<a name="line.216"></a>
+<span class="sourceLineNo">217</span>     *             when &lt;code&gt;pool&lt;/code&gt; is &lt;code&gt;null&lt;/code&gt;.<a name="line.217"></a>
+<span class="sourceLineNo">218</span>     */<a name="line.218"></a>
+<span class="sourceLineNo">219</span>    public static &lt;T&gt; void prefill(final ObjectPool&lt;T&gt; pool, final int count)<a name="line.219"></a>
+<span class="sourceLineNo">220</span>            throws Exception, IllegalArgumentException {<a name="line.220"></a>
+<span class="sourceLineNo">221</span>        if (pool == null) {<a name="line.221"></a>
+<span class="sourceLineNo">222</span>            throw new IllegalArgumentException("pool must not be null.");<a name="line.222"></a>
+<span class="sourceLineNo">223</span>        }<a name="line.223"></a>
+<span class="sourceLineNo">224</span>        for (int i = 0; i &lt; count; i++) {<a name="line.224"></a>
+<span class="sourceLineNo">225</span>            pool.addObject();<a name="line.225"></a>
+<span class="sourceLineNo">226</span>        }<a name="line.226"></a>
+<span class="sourceLineNo">227</span>    }<a name="line.227"></a>
+<span class="sourceLineNo">228</span><a name="line.228"></a>
+<span class="sourceLineNo">229</span>    /**<a name="line.229"></a>
+<span class="sourceLineNo">230</span>     * Call &lt;code&gt;addObject(Object)&lt;/code&gt; on &lt;code&gt;keyedPool&lt;/code&gt; with<a name="line.230"></a>
+<span class="sourceLineNo">231</span>     * &lt;code&gt;key&lt;/code&gt; &lt;code&gt;count&lt;/code&gt; number of times.<a name="line.231"></a>
+<span class="sourceLineNo">232</span>     *<a name="line.232"></a>
+<span class="sourceLineNo">233</span>     * @param keyedPool<a name="line.233"></a>
+<span class="sourceLineNo">234</span>     *            the keyedPool to prefill.<a name="line.234"></a>
+<span class="sourceLineNo">235</span>     * @param key<a name="line.235"></a>
+<span class="sourceLineNo">236</span>     *            the key to add objects for.<a name="line.236"></a>
+<span class="sourceLineNo">237</span>     * @param count<a name="line.237"></a>
+<span class="sourceLineNo">238</span>     *            the number of idle objects to add for &lt;code&gt;key&lt;/code&gt;.<a name="line.238"></a>
+<span class="sourceLineNo">239</span>     * @param &lt;K&gt; the type of the pool key<a name="line.239"></a>
+<span class="sourceLineNo">240</span>     * @param &lt;V&gt; the type of pool entries<a name="line.240"></a>
+<span class="sourceLineNo">241</span>     * @throws Exception<a name="line.241"></a>
+<span class="sourceLineNo">242</span>     *             when {@link KeyedObjectPool#addObject(Object)} fails.<a name="line.242"></a>
+<span class="sourceLineNo">243</span>     * @throws IllegalArgumentException<a name="line.243"></a>
+<span class="sourceLineNo">244</span>     *             when &lt;code&gt;keyedPool&lt;/code&gt; or &lt;code&gt;key&lt;/code&gt; is<a name="line.244"></a>
+<span class="sourceLineNo">245</span>     *             &lt;code&gt;null&lt;/code&gt;.<a name="line.245"></a>
+<span class="sourceLineNo">246</span>     */<a name="line.246"></a>
+<span class="sourceLineNo">247</span>    public static &lt;K, V&gt; void prefill(final KeyedObjectPool&lt;K, V&gt; keyedPool,<a name="line.247"></a>
+<span class="sourceLineNo">248</span>            final K key, final int count) throws Exception,<a name="line.248"></a>
+<span class="sourceLineNo">249</span>            IllegalArgumentException {<a name="line.249"></a>
+<span class="sourceLineNo">250</span>        if (keyedPool == null) {<a name="line.250"></a>
+<span class="sourceLineNo">251</span>            throw new IllegalArgumentException("keyedPool must not be null.");<a name="line.251"></a>
+<span class="sourceLineNo">252</span>        }<a name="line.252"></a>
+<span class="sourceLineNo">253</span>        if (key == null) {<a name="line.253"></a>
+<span class="sourceLineNo">254</span>            throw new IllegalArgumentException("key must not be null.");<a name="line.254"></a>
+<span class="sourceLineNo">255</span>        }<a name="line.255"></a>
+<span class="sourceLineNo">256</span>        for (int i = 0; i &lt; count; i++) {<a name="line.256"></a>
+<span class="sourceLineNo">257</span>            keyedPool.addObject(key);<a name="line.257"></a>
+<span class="sourceLineNo">258</span>        }<a name="line.258"></a>
+<span class="sourceLineNo">259</span>    }<a name="line.259"></a>
+<span class="sourceLineNo">260</span><a name="line.260"></a>
+<span class="sourceLineNo">261</span>    /**<a name="line.261"></a>
+<span class="sourceLineNo">262</span>     * Call &lt;code&gt;addObject(Object)&lt;/code&gt; on &lt;code&gt;keyedPool&lt;/code&gt; with each<a name="line.262"></a>
+<span class="sourceLineNo">263</span>     * key in &lt;code&gt;keys&lt;/code&gt; for &lt;code&gt;count&lt;/code&gt; number of times. This has<a name="line.263"></a>
+<span class="sourceLineNo">264</span>     * the same effect as calling {@link #prefill(KeyedObjectPool, Object, int)}<a name="line.264"></a>
+<span class="sourceLineNo">265</span>     * for each key in the &lt;code&gt;keys&lt;/code&gt; collection.<a name="line.265"></a>
+<span class="sourceLineNo">266</span>     *<a name="line.266"></a>
+<span class="sourceLineNo">267</span>     * @param keyedPool<a name="line.267"></a>
+<span class="sourceLineNo">268</span>     *            the keyedPool to prefill.<a name="line.268"></a>
+<span class="sourceLineNo">269</span>     * @param keys<a name="line.269"></a>
+<span class="sourceLineNo">270</span>     *            {@link Collection} of keys to add objects for.<a name="line.270"></a>
+<span class="sourceLineNo">271</span>     * @param count<a name="line.271"></a>
+<span class="sourceLineNo">272</span>     *            the number of idle objects to add for each &lt;code&gt;key&lt;/code&gt;.<a name="line.272"></a>
+<span class="sourceLineNo">273</span>     * @param &lt;K&gt; the type of the pool key<a name="line.273"></a>
+<span class="sourceLineNo">274</span>     * @param &lt;V&gt; the type of pool entries<a name="line.274"></a>
+<span class="sourceLineNo">275</span>     * @throws Exception<a name="line.275"></a>
+<span class="sourceLineNo">276</span>     *             when {@link KeyedObjectPool#addObject(Object)} fails.<a name="line.276"></a>
+<span class="sourceLineNo">277</span>     * @throws IllegalArgumentException<a name="line.277"></a>
+<span class="sourceLineNo">278</span>     *             when &lt;code&gt;keyedPool&lt;/code&gt;, &lt;code&gt;keys&lt;/code&gt;, or any value<a name="line.278"></a>
+<span class="sourceLineNo">279</span>     *             in &lt;code&gt;keys&lt;/code&gt; is &lt;code&gt;null&lt;/code&gt;.<a name="line.279"></a>
+<span class="sourceLineNo">280</span>     * @see #prefill(KeyedObjectPool, Object, int)<a name="line.280"></a>
+<span class="sourceLineNo">281</span>     */<a name="line.281"></a>
+<span class="sourceLineNo">282</span>    public static &lt;K, V&gt; void prefill(final KeyedObjectPool&lt;K, V&gt; keyedPool,<a name="line.282"></a>
+<span class="sourceLineNo">283</span>            final Collection&lt;K&gt; keys, final int count) throws Exception,<a name="line.283"></a>
+<span class="sourceLineNo">284</span>            IllegalArgumentException {<a name="line.284"></a>
+<span class="sourceLineNo">285</span>        if (keys == null) {<a name="line.285"></a>
+<span class="sourceLineNo">286</span>            throw new IllegalArgumentException("keys must not be null.");<a name="line.286"></a>
+<span class="sourceLineNo">287</span>        }<a name="line.287"></a>
+<span class="sourceLineNo">288</span>        final Iterator&lt;K&gt; iter = keys.iterator();<a name="line.288"></a>
+<span class="sourceLineNo">289</span>        while (iter.hasNext()) {<a name="line.289"></a>
+<span class="sourceLineNo">290</span>            prefill(keyedPool, iter.next(), count);<a name="line.290"></a>
+<span class="sourceLineNo">291</span>        }<a name="line.291"></a>
+<span class="sourceLineNo">292</span>    }<a name="line.292"></a>
+<span class="sourceLineNo">293</span><a name="line.293"></a>
+<span class="sourceLineNo">294</span>    /**<a name="line.294"></a>
+<span class="sourceLineNo">295</span>     * Returns a synchronized (thread-safe) ObjectPool backed by the specified<a name="line.295"></a>
+<span class="sourceLineNo">296</span>     * ObjectPool.<a name="line.296"></a>
+<span class="sourceLineNo">297</span>     * &lt;p&gt;<a name="line.297"></a>
+<span class="sourceLineNo">298</span>     * &lt;b&gt;Note:&lt;/b&gt; This should not be used on pool implementations that already<a name="line.298"></a>
+<span class="sourceLineNo">299</span>     * provide proper synchronization such as the pools provided in the Commons<a name="line.299"></a>
+<span class="sourceLineNo">300</span>     * Pool library. Wrapping a pool that {@link #wait() waits} for poolable<a name="line.300"></a>
+<span class="sourceLineNo">301</span>     * objects to be returned before allowing another one to be borrowed with<a name="line.301"></a>
+<span class="sourceLineNo">302</span>     * another layer of synchronization will cause liveliness issues or a<a name="line.302"></a>
+<span class="sourceLineNo">303</span>     * deadlock.<a name="line.303"></a>
+<span class="sourceLineNo">304</span>     * &lt;/p&gt;<a name="line.304"></a>
+<span class="sourceLineNo">305</span>     *<a name="line.305"></a>
+<span class="sourceLineNo">306</span>     * @param pool<a name="line.306"></a>
+<span class="sourceLineNo">307</span>     *            the ObjectPool to be "wrapped" in a synchronized ObjectPool.<a name="line.307"></a>
+<span class="sourceLineNo">308</span>     * @param &lt;T&gt; the type of objects in the pool<a name="line.308"></a>
+<span class="sourceLineNo">309</span>     * @return a synchronized view of the specified ObjectPool.<a name="line.309"></a>
+<span class="sourceLineNo">310</span>     */<a name="line.310"></a>
+<span class="sourceLineNo">311</span>    public static &lt;T&gt; ObjectPool&lt;T&gt; synchronizedPool(final ObjectPool&lt;T&gt; pool) {<a name="line.311"></a>
+<span class="sourceLineNo">312</span>        if (pool == null) {<a name="line.312"></a>
+<span class="sourceLineNo">313</span>            throw new IllegalArgumentException("pool must not be null.");<a name="line.313"></a>
+<span class="sourceLineNo">314</span>        }<a name="line.314"></a>
+<span class="sourceLineNo">315</span>        /*<a name="line.315"></a>
+<span class="sourceLineNo">316</span>         * assert !(pool instanceof GenericObjectPool) :<a name="line.316"></a>
+<span class="sourceLineNo">317</span>         * "GenericObjectPool is already thread-safe"; assert !(pool instanceof<a name="line.317"></a>
+<span class="sourceLineNo">318</span>         * SoftReferenceObjectPool) :<a name="line.318"></a>
+<span class="sourceLineNo">319</span>         * "SoftReferenceObjectPool is already thread-safe"; assert !(pool<a name="line.319"></a>
+<span class="sourceLineNo">320</span>         * instanceof StackObjectPool) :<a name="line.320"></a>
+<span class="sourceLineNo">321</span>         * "StackObjectPool is already thread-safe"; assert<a name="line.321"></a>
+<span class="sourceLineNo">322</span>         * !"org.apache.commons.pool.composite.CompositeObjectPool"<a name="line.322"></a>
+<span class="sourceLineNo">323</span>         * .equals(pool.getClass().getName()) :<a name="line.323"></a>
+<span class="sourceLineNo">324</span>         * "CompositeObjectPools are already thread-safe";<a name="line.324"></a>
+<span class="sourceLineNo">325</span>         */<a name="line.325"></a>
+<span class="sourceLineNo">326</span>        return new SynchronizedObjectPool&lt;T&gt;(pool);<a name="line.326"></a>
+<span class="sourceLineNo">327</span>    }<a name="line.327"></a>
+<span class="sourceLineNo">328</span><a name="line.328"></a>
+<span class="sourceLineNo">329</span>    /**<a name="line.329"></a>
+<span class="sourceLineNo">330</span>     * Returns a synchronized (thread-safe) KeyedObjectPool backed by the<a name="line.330"></a>
+<span class="sourceLineNo">331</span>     * specified KeyedObjectPool.<a name="line.331"></a>
+<span class="sourceLineNo">332</span>     * &lt;p&gt;<a name="line.332"></a>
+<span class="sourceLineNo">333</span>     * &lt;b&gt;Note:&lt;/b&gt; This should not be used on pool implementations that already<a name="line.333"></a>
+<span class="sourceLineNo">334</span>     * provide proper synchronization such as the pools provided in the Commons<a name="line.334"></a>
+<span class="sourceLineNo">335</span>     * Pool library. Wrapping a pool that {@link #wait() waits} for poolable<a name="line.335"></a>
+<span class="sourceLineNo">336</span>     * objects to be returned before allowing another one to be borrowed with<a name="line.336"></a>
+<span class="sourceLineNo">337</span>     * another layer of synchronization will cause liveliness issues or a<a name="line.337"></a>
+<span class="sourceLineNo">338</span>     * deadlock.<a name="line.338"></a>
+<span class="sourceLineNo">339</span>     * &lt;/p&gt;<a name="line.339"></a>
+<span class="sourceLineNo">340</span>     *<a name="line.340"></a>
+<span class="sourceLineNo">341</span>     * @param keyedPool<a name="line.341"></a>
+<span class="sourceLineNo">342</span>     *            the KeyedObjectPool to be "wrapped" in a synchronized<a name="line.342"></a>
+<span class="sourceLineNo">343</span>     *            KeyedObjectPool.<a name="line.343"></a>
+<span class="sourceLineNo">344</span>     * @param &lt;K&gt; the type of the pool key<a name="line.344"></a>
+<span class="sourceLineNo">345</span>     * @param &lt;V&gt; the type of pool entries<a name="line.345"></a>
+<span class="sourceLineNo">346</span>     * @return a synchronized view of the specified KeyedObjectPool.<a name="line.346"></a>
+<span class="sourceLineNo">347</span>     */<a name="line.347"></a>
+<span class="sourceLineNo">348</span>    public static &lt;K, V&gt; KeyedObjectPool&lt;K, V&gt; synchronizedPool(<a name="line.348"></a>
+<span class="sourceLineNo">349</span>            final KeyedObjectPool&lt;K, V&gt; keyedPool) {<a name="line.349"></a>
+<span class="sourceLineNo">350</span>        /*<a name="line.350"></a>
+<span class="sourceLineNo">351</span>         * assert !(keyedPool instanceof GenericKeyedObjectPool) :<a name="line.351"></a>
+<span class="sourceLineNo">352</span>         * "GenericKeyedObjectPool is already thread-safe"; assert !(keyedPool<a name="line.352"></a>
+<span class="sourceLineNo">353</span>         * instanceof StackKeyedObjectPool) :<a name="line.353"></a>
+<span class="sourceLineNo">354</span>         * "StackKeyedObjectPool is already thread-safe"; assert<a name="line.354"></a>
+<span class="sourceLineNo">355</span>         * !"org.apache.commons.pool.composite.CompositeKeyedObjectPool"<a name="line.355"></a>
+<span class="sourceLineNo">356</span>         * .equals(keyedPool.getClass().getName()) :<a name="line.356"></a>
+<span class="sourceLineNo">357</span>         * "CompositeKeyedObjectPools are already thread-safe";<a name="line.357"></a>
+<span class="sourceLineNo">358</span>         */<a name="line.358"></a>
+<span class="sourceLineNo">359</span>        return new SynchronizedKeyedObjectPool&lt;K, V&gt;(keyedPool);<a name="line.359"></a>
+<span class="sourceLineNo">360</span>    }<a name="line.360"></a>
+<span class="sourceLineNo">361</span><a name="line.361"></a>
+<span class="sourceLineNo">362</span>    /**<a name="line.362"></a>
+<span class="sourceLineNo">363</span>     * Returns a synchronized (thread-safe) PooledObjectFactory backed by the<a name="line.363"></a>
+<span class="sourceLineNo">364</span>     * specified PooledObjectFactory.<a name="line.364"></a>
+<span class="sourceLineNo">365</span>     *<a name="line.365"></a>
+<span class="sourceLineNo">366</span>     * @param factory<a name="line.366"></a>
+<span class="sourceLineNo">367</span>     *            the PooledObjectFactory to be "wrapped" in a synchronized<a name="line.367"></a>
+<span class="sourceLineNo">368</span>     *            PooledObjectFactory.<a name="line.368"></a>
+<span class="sourceLineNo">369</span>     * @param &lt;T&gt; the type of objects in the pool<a name="line.369"></a>
+<span class="sourceLineNo">370</span>     * @return a synchronized view of the specified PooledObjectFactory.<a name="line.370"></a>
+<span class="sourceLineNo">371</span>     */<a name="line.371"></a>
+<span class="sourceLineNo">372</span>    public static &lt;T&gt; PooledObjectFactory&lt;T&gt; synchronizedPooledFactory(<a name="line.372"></a>
+<span class="sourceLineNo">373</span>            final PooledObjectFactory&lt;T&gt; factory) {<a name="line.373"></a>
+<span class="sourceLineNo">374</span>        return new SynchronizedPooledObjectFactory&lt;T&gt;(factory);<a name="line.374"></a>
+<span class="sourceLineNo">375</span>    }<a name="line.375"></a>
+<span class="sourceLineNo">376</span><a name="line.376"></a>
+<span class="sourceLineNo">377</span>    /**<a name="line.377"></a>
+<span class="sourceLineNo">378</span>     * Returns a synchronized (thread-safe) KeyedPooledObjectFactory backed by<a name="line.378"></a>
+<span class="sourceLineNo">379</span>     * the specified KeyedPoolableObjectFactory.<a name="line.379"></a>
+<span class="sourceLineNo">380</span>     *<a name="line.380"></a>
+<span class="sourceLineNo">381</span>     * @param keyedFactory<a name="line.381"></a>
+<span class="sourceLineNo">382</span>     *            the KeyedPooledObjectFactory to be "wrapped" in a<a name="line.382"></a>
+<span class="sourceLineNo">383</span>     *            synchronized KeyedPooledObjectFactory.<a name="line.383"></a>
+<span class="sourceLineNo">384</span>     * @param &lt;K&gt; the type of the pool key<a name="line.384"></a>
+<span class="sourceLineNo">385</span>     * @param &lt;V&gt; the type of pool entries<a name="line.385"></a>
+<span class="sourceLineNo">386</span>     * @return a synchronized view of the specified KeyedPooledObjectFactory.<a name="line.386"></a>
+<span class="sourceLineNo">387</span>     */<a name="line.387"></a>
+<span class="sourceLineNo">388</span>    public static &lt;K, V&gt; KeyedPooledObjectFactory&lt;K, V&gt; synchronizedKeyedPooledFactory(<a name="line.388"></a>
+<span class="sourceLineNo">389</span>            final KeyedPooledObjectFactory&lt;K, V&gt; keyedFactory) {<a name="line.389"></a>
+<span class="sourceLineNo">390</span>        return new SynchronizedKeyedPooledObjectFactory&lt;K, V&gt;(keyedFactory);<a name="line.390"></a>
+<span class="sourceLineNo">391</span>    }<a name="line.391"></a>
+<span class="sourceLineNo">392</span><a name="line.392"></a>
+<span class="sourceLineNo">393</span>    /**<a name="line.393"></a>
+<span class="sourceLineNo">394</span>     * Returns a pool that adaptively decreases its size when idle objects are<a name="line.394"></a>
+<span class="sourceLineNo">395</span>     * no longer needed. This is intended as an always thread-safe alternative<a name="line.395"></a>
+<span class="sourceLineNo">396</span>     * to using an idle object evictor provided by many pool implementations.<a name="line.396"></a>
+<span class="sourceLineNo">397</span>     * This is also an effective way to shrink FIFO ordered pools that<a name="line.397"></a>
+<span class="sourceLineNo">398</span>     * experience load spikes.<a name="line.398"></a>
+<span class="sourceLineNo">399</span>     *<a name="line.399"></a>
+<span class="sourceLineNo">400</span>     * @param pool<a name="line.400"></a>
+<span class="sourceLineNo">401</span>     *            the ObjectPool to be decorated so it shrinks its idle count<a name="line.401"></a>
+<span class="sourceLineNo">402</span>     *            when possible.<a name="line.402"></a>
+<span class="sourceLineNo">403</span>     * @param &lt;T&gt; the type of objects in the pool<a name="line.403"></a>
+<span class="sourceLineNo">404</span>     * @return a pool that adaptively decreases its size when idle objects are<a name="line.404"></a>
+<span class="sourceLineNo">405</span>     *         no longer needed.<a name="line.405"></a>
+<span class="sourceLineNo">406</span>     * @see #erodingPool(ObjectPool, float)<a name="line.406"></a>
+<span class="sourceLineNo">407</span>     */<a name="line.407"></a>
+<span class="sourceLineNo">408</span>    public static &lt;T&gt; ObjectPool&lt;T&gt; erodingPool(final ObjectPool&lt;T&gt; pool) {<a name="line.408"></a>
+<span class="sourceLineNo">409</span>        return erodingPool(pool, 1f);<a name="line.409"></a>
+<span class="sourceLineNo">410</span>    }<a name="line.410"></a>
+<span class="sourceLineNo">411</span><a name="line.411"></a>
+<span class="sourceLineNo">412</span>    /**<a name="line.412"></a>
+<span class="sourceLineNo">413</span>     * Returns a pool that adaptively decreases its size when idle objects are<a name="line.413"></a>
+<span class="sourceLineNo">414</span>     * no longer needed. This is intended as an always thread-safe alternative<a name="line.414"></a>
+<span class="sourceLineNo">415</span>     * to using an idle object evictor provided by many pool implementations.<a name="line.415"></a>
+<span class="sourceLineNo">416</span>     * This is also an effective way to shrink FIFO ordered pools that<a name="line.416"></a>
+<span class="sourceLineNo">417</span>     * experience load spikes.<a name="line.417"></a>
+<span class="sourceLineNo">418</span>     * &lt;p&gt;<a name="line.418"></a>
+<span class="sourceLineNo">419</span>     * The factor parameter provides a mechanism to tweak the rate at which the<a name="line.419"></a>
+<span class="sourceLineNo">420</span>     * pool tries to shrink its size. Values between 0 and 1 cause the pool to<a name="line.420"></a>
+<span class="sourceLineNo">421</span>     * try to shrink its size more often. Values greater than 1 cause the pool<a name="line.421"></a>
+<span class="sourceLineNo">422</span>     * to less frequently try to shrink its size.<a name="line.422"></a>
+<span class="sourceLineNo">423</span>     * &lt;/p&gt;<a name="line.423"></a>
+<span class="sourceLineNo">424</span>     *<a name="line.424"></a>
+<span class="sourceLineNo">425</span>     * @param pool<a name="line.425"></a>
+<span class="sourceLineNo">426</span>     *            the ObjectPool to be decorated so it shrinks its idle count<a name="line.426"></a>
+<span class="sourceLineNo">427</span>     *            when possible.<a name="line.427"></a>
+<span class="sourceLineNo">428</span>     * @param factor<a name="line.428"></a>
+<span class="sourceLineNo">429</span>     *            a positive value to scale the rate at which the pool tries to<a name="line.429"></a>
+<span class="sourceLineNo">430</span>     *            reduce its size. If 0 &amp;lt; factor &amp;lt; 1 then the pool<a name="line.430"></a>
+<span class="sourceLineNo">431</span>     *            shrinks more aggressively. If 1 &amp;lt; factor then the pool<a name="line.431"></a>
+<span class="sourceLineNo">432</span>     *            shrinks less aggressively.<a name="line.432"></a>
+<span class="sourceLineNo">433</span>     * @param &lt;T&gt; the type of objects in the pool<a name="line.433"></a>
+<span class="sourceLineNo">434</span>     * @return a pool that adaptively decreases its size when idle objects are<a name="line.434"></a>
+<span class="sourceLineNo">435</span>     *         no longer needed.<a name="line.435"></a>
+<span class="sourceLineNo">436</span>     * @see #erodingPool(ObjectPool)<a name="line.436"></a>
+<span class="sourceLineNo">437</span>     */<a name="line.437"></a>
+<span class="sourceLineNo">438</span>    public static &lt;T&gt; ObjectPool&lt;T&gt; erodingPool(final ObjectPool&lt;T&gt; pool,<a name="line.438"></a>
+<span class="sourceLineNo">439</span>            final float factor) {<a name="line.439"></a>
+<span class="sourceLineNo">440</span>        if (pool == null) {<a name="line.440"></a>
+<span class="sourceLineNo">441</span>            throw new IllegalArgumentException("pool must not be null.");<a name="line.441"></a>
+<span class="sourceLineNo">442</span>        }<a name="line.442"></a>
+<span class="sourceLineNo">443</span>        if (factor &lt;= 0f) {<a name="line.443"></a>
+<span class="sourceLineNo">444</span>            throw new IllegalArgumentException("factor must be positive.");<a name="line.444"></a>
+<span class="sourceLineNo">445</span>        }<a name="line.445"></a>
+<span class="sourceLineNo">446</span>        return new ErodingObjectPool&lt;T&gt;(pool, factor);<a name="line.446"></a>
+<span class="sourceLineNo">447</span>    }<a name="line.447"></a>
+<span class="sourceLineNo">448</span><a name="line.448"></a>
+<span class="sourceLineNo">449</span>    /**<a name="line.449"></a>
+<span class="sourceLineNo">450</span>     * Returns a pool that adaptively decreases its size when idle objects are<a name="line.450"></a>
+<span class="sourceLineNo">451</span>     * no longer needed. This is intended as an always thread-safe alternative<a name="line.451"></a>
+<span class="sourceLineNo">452</span>     * to using an idle object evictor provided by many pool implementations.<a name="line.452"></a>
+<span class="sourceLineNo">453</span>     * This is also an effective way to shrink FIFO ordered pools that<a name="line.453"></a>
+<span class="sourceLineNo">454</span>     * experience load spikes.<a name="line.454"></a>
+<span class="sourceLineNo">455</span>     *<a name="line.455"></a>
+<span class="sourceLineNo">456</span>     * @param keyedPool<a name="line.456"></a>
+<span class="sourceLineNo">457</span>     *            the KeyedObjectPool to be decorated so it shrinks its idle<a name="line.457"></a>
+<span class="sourceLineNo">458</span>     *            count when possible.<a name="line.458"></a>
+<span class="sourceLineNo">459</span>     * @param &lt;K&gt; the type of the pool key<a name="line.459"></a>
+<span class="sourceLineNo">460</span>     * @param &lt;V&gt; the type of pool entries<a name="line.460"></a>
+<span class="sourceLineNo">461</span>     * @return a pool that adaptively decreases its size when idle objects are<a name="line.461"></a>
+<span class="sourceLineNo">462</span>     *         no longer needed.<a name="line.462"></a>
+<span class="sourceLineNo">463</span>     * @see #erodingPool(KeyedObjectPool, float)<a name="line.463"></a>
+<span class="sourceLineNo">464</span>     * @see #erodingPool(KeyedObjectPool, float, boolean)<a name="line.464"></a>
+<span class="sourceLineNo">465</span>     */<a name="line.465"></a>
+<span class="sourceLineNo">466</span>    public static &lt;K, V&gt; KeyedObjectPool&lt;K, V&gt; erodingPool(<a name="line.466"></a>
+<span class="sourceLineNo">467</span>            final KeyedObjectPool&lt;K, V&gt; keyedPool) {<a name="line.467"></a>
+<span class="sourceLineNo">468</span>        return erodingPool(keyedPool, 1f);<a name="line.468"></a>
+<span class="sourceLineNo">469</span>    }<a name="line.469"></a>
+<span class="sourceLineNo">470</span><a name="line.470"></a>
+<span class="sourceLineNo">471</span>    /**<a name="line.471"></a>
+<span class="sourceLineNo">472</span>     * Returns a pool that adaptively decreases its size when idle objects are<a name="line.472"></a>
+<span class="sourceLineNo">473</span>     * no longer needed. This is intended as an always thread-safe alternative<a name="line.473"></a>
+<span class="sourceLineNo">474</span>     * to using an idle object evictor provided by many pool implementations.<a name="line.474"></a>
+<span class="sourceLineNo">475</span>     * This is also an effective way to shrink FIFO ordered pools that<a name="line.475"></a>
+<span class="sourceLineNo">476</span>     * experience load spikes.<a name="line.476"></a>
+<span class="sourceLineNo">477</span>     * &lt;p&gt;<a name="line.477"></a>
+<span class="sourceLineNo">478</span>     * The factor parameter provides a mechanism to tweak the rate at which the<a name="line.478"></a>
+<span class="sourceLineNo">479</span>     * pool tries to shrink its size. Values between 0 and 1 cause the pool to<a name="line.479"></a>
+<span class="sourceLineNo">480</span>     * try to shrink its size more often. Values greater than 1 cause the pool<a name="line.480"></a>
+<span class="sourceLineNo">481</span>     * to less frequently try to shrink its size.<a name="line.481"></a>
+<span class="sourceLineNo">482</span>     * &lt;/p&gt;<a name="line.482"></a>
+<span class="sourceLineNo">483</span>     *<a name="line.483"></a>
+<span class="sourceLineNo">484</span>     * @param keyedPool<a name="line.484"></a>
+<span class="sourceLineNo">485</span>     *            the KeyedObjectPool to be decorated so it shrinks its idle<a name="line.485"></a>
+<span class="sourceLineNo">486</span>     *            count when possible.<a name="line.486"></a>
+<span class="sourceLineNo">487</span>     * @param factor<a name="line.487"></a>
+<span class="sourceLineNo">488</span>     *            a positive value to scale the rate at which the pool tries to<a name="line.488"></a>
+<span class="sourceLineNo">489</span>     *            reduce its size. If 0 &amp;lt; factor &amp;lt; 1 then the pool<a name="line.489"></a>
+<span class="sourceLineNo">490</span>     *            shrinks more aggressively. If 1 &amp;lt; factor then the pool<a name="line.490"></a>
+<span class="sourceLineNo">491</span>     *            shrinks less aggressively.<a name="line.491"></a>
+<span class="sourceLineNo">492</span>     * @param &lt;K&gt; the type of the pool key<a name="line.492"></a>
+<span class="sourceLineNo">493</span>     * @param &lt;V&gt; the type of pool entries<a name="line.493"></a>
+<span class="sourceLineNo">494</span>     * @return a pool that adaptively decreases its size when idle objects are<a name="line.494"></a>
+<span class="sourceLineNo">495</span>     *         no longer needed.<a name="line.495"></a>
+<span class="sourceLineNo">496</span>     * @see #erodingPool(KeyedObjectPool, float, boolean)<a name="line.496"></a>
+<span class="sourceLineNo">497</span>     */<a name="line.497"></a>
+<span class="sourceLineNo">498</span>    public static &lt;K, V&gt; KeyedObjectPool&lt;K, V&gt; erodingPool(<a name="line.498"></a>
+<span class="sourceLineNo">499</span>            final KeyedObjectPool&lt;K, V&gt; keyedPool, final float factor) {<a name="line.499"></a>
+<span class="sourceLineNo">500</span>        return erodingPool(keyedPool, factor, false);<a name="line.500"></a>
+<span class="sourceLineNo">501</span>    }<a name="line.501"></a>
+<span class="sourceLineNo">502</span><a name="line.502"></a>
+<span class="sourceLineNo">503</span>    /**<a name="line.503"></a>
+<span class="sourceLineNo">504</span>     * Returns a pool that adaptively decreases its size when idle objects are<a name="line.504"></a>
+<span class="sourceLineNo">505</span>     * no longer needed. This is intended as an always thread-safe alternative<a name="line.505"></a>
+<span class="sourceLineNo">506</span>     * to using an idle object evictor provided by many pool implementations.<a name="line.506"></a>
+<span class="sourceLineNo">507</span>     * This is also an effective way to shrink FIFO ordered pools that<a name="line.507"></a>
+<span class="sourceLineNo">508</span>     * experience load spikes.<a name="line.508"></a>
+<span class="sourceLineNo">509</span>     * &lt;p&gt;<a name="line.509"></a>
+<span class="sourceLineNo">510</span>     * The factor parameter provides a mechanism to tweak the rate at which the<a name="line.510"></a>
+<span class="sourceLineNo">511</span>     * pool tries to shrink its size. Values between 0 and 1 cause the pool to<a name="line.511"></a>
+<span class="sourceLineNo">512</span>     * try to shrink its size more often. Values greater than 1 cause the pool<a name="line.512"></a>
+<span class="sourceLineNo">513</span>     * to less frequently try to shrink its size.<a name="line.513"></a>
+<span class="sourceLineNo">514</span>     * &lt;/p&gt;<a name="line.514"></a>
+<span class="sourceLineNo">515</span>     * &lt;p&gt;<a name="line.515"></a>
+<span class="sourceLineNo">516</span>     * The perKey parameter determines if the pool shrinks on a whole pool basis<a name="line.516"></a>
+<span class="sourceLineNo">517</span>     * or a per key basis. When perKey is false, the keys do not have an effect<a name="line.517"></a>
+<span class="sourceLineNo">518</span>     * on the rate at which the pool tries to shrink its size. When perKey is<a name="line.518"></a>
+<span class="sourceLineNo">519</span>     * true, each key is shrunk independently.<a name="line.519"></a>
+<span class="sourceLineNo">520</span>     * &lt;/p&gt;<a name="line.520"></a>
+<span class="sourceLineNo">521</span>     *<a name="line.521"></a>
+<span class="sourceLineNo">522</span>     * @param keyedPool<a name="line.522"></a>
+<span class="sourceLineNo">523</span>     *            the KeyedObjectPool to be decorated so it shrinks its idle<a name="line.523"></a>
+<span class="sourceLineNo">524</span>     *            count when possible.<a name="line.524"></a>
+<span class="sourceLineNo">525</span>     * @param factor<a name="line.525"></a>
+<span class="sourceLineNo">526</span>     *            a positive value to scale the rate at which the pool tries to<a name="line.526"></a>
+<span class="sourceLineNo">527</span>     *            reduce its size. If 0 &amp;lt; factor &amp;lt; 1 then the pool<a name="line.527"></a>
+<span class="sourceLineNo">528</span>     *            shrinks more aggressively. If 1 &amp;lt; factor then the pool<a name="line.528"></a>
+<span class="sourceLineNo">529</span>     *            shrinks less aggressively.<a name="line.529"></a>
+<span class="sourceLineNo">530</span>     * @param perKey<a name="line.530"></a>
+<span class="sourceLineNo">531</span>     *            when true, each key is treated independently.<a name="line.531"></a>
+<span class="sourceLineNo">532</span>     * @param &lt;K&gt; the type of the pool key<a name="line.532"></a>
+<span class="sourceLineNo">533</span>     * @param &lt;V&gt; the type of pool entries<a name="line.533"></a>
+<span class="sourceLineNo">534</span>     * @return a pool that adaptively decreases its size when idle objects are<a name="line.534"></a>
+<span class="sourceLineNo">535</span>     *         no longer needed.<a name="line.535"></a>
+<span class="sourceLineNo">536</span>     * @see #erodingPool(KeyedObjectPool)<a name="line.536"></a>
+<span class="sourceLineNo">537</span>     * @see #erodingPool(KeyedObjectPool, float)<a name="line.537"></a>
+<span class="sourceLineNo">538</span>     */<a name="line.538"></a>
+<span class="sourceLineNo">539</span>    public static &lt;K, V&gt; KeyedObjectPool&lt;K, V&gt; erodingPool(<a name="line.539"></a>
+<span class="sourceLineNo">540</span>            final KeyedObjectPool&lt;K, V&gt; keyedPool, final float factor,<a name="line.540"></a>
+<span class="sourceLineNo">541</span>            final boolean perKey) {<a name="line.541"></a>
+<span class="sourceLineNo">542</span>        if (keyedPool == null) {<a name="line.542"></a>
+<span class="sourceLineNo">543</span>            throw new IllegalArgumentException("keyedPool must not be null.");<a name="line.543"></a>
+<span class="sourceLineNo">544</span>        }<a name="line.544"></a>
+<span class="sourceLineNo">545</span>        if (factor &lt;= 0f) {<a name="line.545"></a>
+<span class="sourceLineNo">546</span>            throw new IllegalArgumentException("factor must be positive.");<a name="line.546"></a>
+<span class="sourceLineNo">547</span>        }<a name="line.547"></a>
+<span class="sourceLineNo">548</span>        if (perKey) {<a name="line.548"></a>
+<span class="sourceLineNo">549</span>            return new ErodingPerKeyKeyedObjectPool&lt;K, V&gt;(keyedPool, factor);<a name="line.549"></a>
+<span class="sourceLineNo">550</span>        }<a name="line.550"></a>
+<span class="sourceLineNo">551</span>        return new ErodingKeyedObjectPool&lt;K, V&gt;(keyedPool, factor);<a name="line.551"></a>
+<span class="sourceLineNo">552</span>    }<a name="line.552"></a>
+<span class="sourceLineNo">553</span><a name="line.553"></a>
+<span class="sourceLineNo">554</span>    /**<a name="line.554"></a>
+<span class="sourceLineNo">555</span>     * Get the &lt;code&gt;Timer&lt;/code&gt; for checking keyedPool's idle count.<a name="line.555"></a>
+<span class="sourceLineNo">556</span>     *<a name="line.556"></a>
+<span class="sourceLineNo">557</span>     * @return the {@link Timer} for checking keyedPool's idle count.<a name="line.557"></a>
+<span class="sourceLineNo">558</span>     */<a name="line.558"></a>
+<span class="sourceLineNo">559</span>    private static Timer getMinIdleTimer() {<a name="line.559"></a>
+<span class="sourceLineNo">560</span>        return TimerHolder.MIN_IDLE_TIMER;<a name="line.560"></a>
+<span class="sourceLineNo">561</span>    }<a name="line.561"></a>
+<span class="sourceLineNo">562</span><a name="line.562"></a>
+<span class="sourceLineNo">563</span>    /**<a name="line.563"></a>
+<span class="sourceLineNo">564</span>     * Timer task that adds objects to the pool until the number of idle<a name="line.564"></a>
+<span class="sourceLineNo">565</span>     * instances reaches the configured minIdle. Note that this is not the same<a name="line.565"></a>
+<span class="sourceLineNo">566</span>     * as the pool's minIdle setting.<a name="line.566"></a>
+<span class="sourceLineNo">567</span>     */<a name="line.567"></a>
+<span class="sourceLineNo">568</span>    private static class ObjectPoolMinIdleTimerTask&lt;T&gt; extends TimerTask {<a name="line.568"></a>
+<span class="sourceLineNo">569</span><a name="line.569"></a>
+<span class="sourceLineNo">570</span>        /** Minimum number of idle instances. Not the same as pool.getMinIdle(). */<a name="line.570"></a>
+<span class="sourceLineNo">571</span>        private final int minIdle;<a name="line.571"></a>
+<span class="sourceLineNo">572</span><a name="line.572"></a>
+<span class="sourceLineNo">573</span>        /** Object pool */<a name="line.573"></a>
+<span class="sourceLineNo">574</span>        private final ObjectPool&lt;T&gt; pool;<a name="line.574"></a>
+<span class="sourceLineNo">575</span><a name="line.575"></a>
+<span class="sourceLineNo">576</span>        /**<a name="line.576"></a>
+<span class="sourceLineNo">577</span>         * Create a new ObjectPoolMinIdleTimerTask for the given pool with the<a name="line.577"></a>
+<span class="sourceLineNo">578</span>         * given minIdle setting.<a name="line.578"></a>
+<span class="sourceLineNo">579</span>         *<a name="line.579"></a>
+<span class="sourceLineNo">580</span>         * @param pool<a name="line.580"></a>
+<span class="sourceLineNo">581</span>         *            object pool<a name="line.581"></a>
+<span class="sourceLineNo">582</span>         * @param minIdle<a name="line.582"></a>
+<span class="sourceLineNo">583</span>         *            number of idle instances to maintain<a name="line.583"></a>
+<span class="sourceLineNo">584</span>         * @throws IllegalArgumentException<a name="line.584"></a>
+<span class="sourceLineNo">585</span>         *             if the pool is null<a name="line.585"></a>
+<span class="sourceLineNo">586</span>         */<a name="line.586"></a>
+<span class="sourceLineNo">587</span>        ObjectPoolMinIdleTimerTask(final ObjectPool&lt;T&gt; pool, final int minIdle)<a name="line.587"></a>
+<span class="sourceLineNo">588</span>                throws IllegalArgumentException {<a name="line.588"></a>
+<span class="sourceLineNo">589</span>            if (pool == null) {<a name="line.589"></a>
+<span class="sourceLineNo">590</span>                throw new IllegalArgumentException("pool must not be null.");<a name="line.590"></a>
+<span class="sourceLineNo">591</span>            }<a name="line.591"></a>
+<span class="sourceLineNo">592</span>            this.pool = pool;<a name="line.592"></a>
+<span class="sourceLineNo">593</span>            this.minIdle = minIdle;<a name="line.593"></a>
+<span class="sourceLineNo">594</span>        }<a name="line.594"></a>
+<span class="sourceLineNo">595</span><a name="line.595"></a>
+<span class="sourceLineNo">596</span>        /**<a name="line.596"></a>
+<span class="sourceLineNo">597</span>         * {@inheritDoc}<a name="line.597"></a>
+<span class="sourceLineNo">598</span>         */<a name="line.598"></a>
+<span class="sourceLineNo">599</span>        @Override<a name="line.599"></a>
+<span class="sourceLineNo">600</span>        public void run() {<a name="line.600"></a>
+<span class="sourceLineNo">601</span>            boolean success = false;<a name="line.601"></a>
+<span class="sourceLineNo">602</span>            try {<a name="line.602"></a>
+<span class="sourceLineNo">603</span>                if (pool.getNumIdle() &lt; minIdle) {<a name="line.603"></a>
+<span class="sourceLineNo">604</span>                    pool.addObject();<a name="line.604"></a>
+<span class="sourceLineNo">605</span>                }<a name="line.605"></a>
+<span class="sourceLineNo">606</span>                success = true;<a name="line.606"></a>
+<span class="sourceLineNo">607</span><a name="line.607"></a>
+<span class="sourceLineNo">608</span>            } catch (Exception e) {<a name="line.608"></a>
+<span class="sourceLineNo">609</span>                cancel();<a name="line.609"></a>
+<span class="sourceLineNo">610</span>            } finally {<a name="line.610"></a>
+<span class="sourceLineNo">611</span>                // detect other types of Throwable and cancel this Timer<a name="line.611"></a>
+<span class="sourceLineNo">612</span>                if (!success) {<a name="line.612"></a>
+<span class="sourceLineNo">613</span>                    cancel();<a name="line.613"></a>
+<span class="sourceLineNo">614</span>                }<a name="line.614"></a>
+<span class="sourceLineNo">615</span>            }<a name="line.615"></a>
+<span class="sourceLineNo">616</span>        }<a name="line.616"></a>
+<span class="sourceLineNo">617</span><a name="line.617"></a>
+<span class="sourceLineNo">618</span>        /**<a name="line.618"></a>
+<span class="sourceLineNo">619</span>         * {@inheritDoc}<a name="line.619"></a>
+<span class="sourceLineNo">620</span>         */<a name="line.620"></a>
+<span class="sourceLineNo">621</span>        @Override<a name="line.621"></a>
+<span class="sourceLineNo">622</span>        public String toString() {<a name="line.622"></a>
+<span class="sourceLineNo">623</span>            final StringBuilder sb = new StringBuilder();<a name="line.623"></a>
+<span class="sourceLineNo">624</span>            sb.append("ObjectPoolMinIdleTimerTask");<a name="line.624"></a>
+<span class="sourceLineNo">625</span>            sb.append("{minIdle=").append(minIdle);<a name="line.625"></a>
+<span class="sourceLineNo">626</span>            sb.append(", pool=").append(pool);<a name="line.626"></a>
+<span class="sourceLineNo">627</span>            sb.append('}');<a name="line.627"></a>
+<span class="sourceLineNo">628</span>            return sb.toString();<a name="line.628"></a>
+<span class="sourceLineNo">629</span>        }<a name="line.629"></a>
+<span class="sourceLineNo">630</span>    }<a name="line.630"></a>
+<span class="sourceLineNo">631</span><a name="line.631"></a>
+<span class="sourceLineNo">632</span>    /**<a name="line.632"></a>
+<span class="sourceLineNo">633</span>     * Timer task that adds objects to the pool until the number of idle<a name="line.633"></a>
+<span class="sourceLineNo">634</span>     * instances for the given key reaches the configured minIdle. Note that<a name="line.634"></a>
+<span class="sourceLineNo">635</span>     * this is not the same as the pool's minIdle setting.<a name="line.635"></a>
+<span class="sourceLineNo">636</span>     */<a name="line.636"></a>
+<span class="sourceLineNo">637</span>    private static class KeyedObjectPoolMinIdleTimerTask&lt;K, V&gt; extends<a name="line.637"></a>
+<span class="sourceLineNo">638</span>            TimerTask {<a name="line.638"></a>
+<span class="sourceLineNo">639</span>        /** Minimum number of idle instances. Not the same as pool.getMinIdle(). */<a name="line.639"></a>
+<span class="sourceLineNo">640</span>        private final int minIdle;<a name="line.640"></a>
+<span class="sourceLineNo">641</span><a name="line.641"></a>
+<span class="sourceLineNo">642</span>        /** Key to ensure minIdle for */<a name="line.642"></a>
+<span class="sourceLineNo">643</span>        private final K key;<a name="line.643"></a>
+<span class="sourceLineNo">644</span><a name="line.644"></a>
+<span class="sourceLineNo">645</span>        /** Keyed object pool */<a name="line.645"></a>
+<span class="sourceLineNo">646</span>        private final KeyedObjectPool&lt;K, V&gt; keyedPool;<a name="line.646"></a>
+<span class="sourceLineNo">647</span><a name="line.647"></a>
+<span class="sourceLineNo">648</span>        /**<a name="line.648"></a>
+<span class="sourceLineNo">649</span>         * Create a new KeyedObjecPoolMinIdleTimerTask.<a name="line.649"></a>
+<span class="sourceLineNo">650</span>         *<a name="line.650"></a>
+<span class="sourceLineNo">651</span>         * @param keyedPool<a name="line.651"></a>
+<span class="sourceLineNo">652</span>         *            keyed object pool<a name="line.652"></a>
+<span class="sourceLineNo">653</span>         * @param key<a name="line.653"></a>
+<span class="sourceLineNo">654</span>         *            key to ensure minimum number of idle instances<a name="line.654"></a>
+<span class="sourceLineNo">655</span>         * @param minIdle<a name="line.655"></a>
+<span class="sourceLineNo">656</span>         *            minimum number of idle instances<a name="line.656"></a>
+<span class="sourceLineNo">657</span>         * @throws IllegalArgumentException<a name="line.657"></a>
+<span class="sourceLineNo">658</span>         *             if the key is null<a name="line.658"></a>
+<span class="sourceLineNo">659</span>         */<a name="line.659"></a>
+<span class="sourceLineNo">660</span>        KeyedObjectPoolMinIdleTimerTask(final KeyedObjectPool&lt;K, V&gt; keyedPool,<a name="line.660"></a>
+<span class="sourceLineNo">661</span>                final K key, final int minIdle) throws IllegalArgumentException {<a name="line.661"></a>
+<span class="sourceLineNo">662</span>            if (keyedPool == null) {<a name="line.662"></a>
+<span class="sourceLineNo">663</span>                throw new IllegalArgumentException(<a name="line.663"></a>
+<span class="sourceLineNo">664</span>                        "keyedPool must not be null.");<a name="line.664"></a>
+<span class="sourceLineNo">665</span>            }<a name="line.665"></a>
+<span class="sourceLineNo">666</span>            this.keyedPool = keyedPool;<a name="line.666"></a>
+<span class="sourceLineNo">667</span>            this.key = key;<a name="line.667"></a>
+<span class="sourceLineNo">668</span>            this.minIdle = minIdle;<a name="line.668"></a>
+<span class="sourceLineNo">669</span>        }<a name="line.669"></a>
+<span class="sourceLineNo">670</span><a name="line.670"></a>
+<span class="sourceLineNo">671</span>        /**<a name="line.671"></a>
+<span class="sourceLineNo">672</span>         * {@inheritDoc}<a name="line.672"></a>
+<span class="sourceLineNo">673</span>         */<a name="line.673"></a>
+<span class="sourceLineNo">674</span>        @Override<a name="line.674"></a>
+<span class="sourceLineNo">675</span>        public void run() {<a name="line.675"></a>
+<span class="sourceLineNo">676</span>            boolean success = false;<a name="line.676"></a>
+<span class="sourceLineNo">677</span>            try {<a name="line.677"></a>
+<span class="sourceLineNo">678</span>                if (keyedPool.getNumIdle(key) &lt; minIdle) {<a name="line.678"></a>
+<span class="sourceLineNo">679</span>                    keyedPool.addObject(key);<a name="line.679"></a>
+<span class="sourceLineNo">680</span>                }<a name="line.680"></a>
+<span class="sourceLineNo">681</span>                success = true;<a name="line.681"></a>
+<span class="sourceLineNo">682</span><a name="line.682"></a>
+<span class="sourceLineNo">683</span>            } catch (Exception e) {<a name="line.683"></a>
+<span class="sourceLineNo">684</span>                cancel();<a name="line.684"></a>
+<span class="sourceLineNo">685</span><a name="line.685"></a>
+<span class="sourceLineNo">686</span>            } finally {<a name="line.686"></a>
+<span class="sourceLineNo">687</span>                // detect other types of Throwable and cancel this Timer<a name="line.687"></a>
+<span class="sourceLineNo">688</span>                if (!success) {<a name="line.688"></a>
+<span class="sourceLineNo">689</span>                    cancel();<a name="line.689"></a>
+<span class="sourceLineNo">690</span>                }<a name="line.690"></a>
+<span class="sourceLineNo">691</span>            }<a name="line.691"></a>
+<span class="sourceLineNo">692</span>        }<a name="line.692"></a>
+<span class="sourceLineNo">693</span><a name="line.693"></a>
+<span class="sourceLineNo">694</span>        /**<a name="line.694"></a>
+<span class="sourceLineNo">695</span>         * {@inheritDoc}<a name="line.695"></a>
+<span class="sourceLineNo">696</span>         */<a name="line.696"></a>
+<span class="sourceLineNo">697</span>        @Override<a name="line.697"></a>
+<span class="sourceLineNo">698</span>        public String toString() {<a name="line.698"></a>
+<span class="sourceLineNo">699</span>            final StringBuilder sb = new StringBuilder();<a name="line.699"></a>
+<span class="sourceLineNo">700</span>            sb.append("KeyedObjectPoolMinIdleTimerTask");<a name="line.700"></a>
+<span class="sourceLineNo">701</span>            sb.append("{minIdle=").append(minIdle);<a name="line.701"></a>
+<span class="sourceLineNo">702</span>            sb.append(", key=").append(key);<a name="line.702"></a>
+<span class="sourceLineNo">703</span>            sb.append(", keyedPool=").append(keyedPool);<a name="line.703"></a>
+<span class="sourceLineNo">704</span>            sb.append('}');<a name="line.704"></a>
+<span class="sourceLineNo">705</span>            return sb.toString();<a name="line.705"></a>
+<span class="sourceLineNo">706</span>        }<a name="line.706"></a>
+<span class="sourceLineNo">707</span>    }<a name="line.707"></a>
+<span class="sourceLineNo">708</span><a name="line.708"></a>
+<span class="sourceLineNo">709</span>    /**<a name="line.709"></a>
+<span class="sourceLineNo">710</span>     * A synchronized (thread-safe) ObjectPool backed by the specified<a name="line.710"></a>
+<span class="sourceLineNo">711</span>     * ObjectPool.<a name="line.711"></a>
+<span class="sourceLineNo">712</span>     * &lt;p&gt;<a name="line.712"></a>
+<span class="sourceLineNo">713</span>     * &lt;b&gt;Note:&lt;/b&gt; This should not be used on pool implementations that already<a name="line.713"></a>
+<span class="sourceLineNo">714</span>     * provide proper synchronization such as the pools provided in the Commons<a name="line.714"></a>
+<span class="sourceLineNo">715</span>     * Pool library. Wrapping a pool that {@link #wait() waits} for poolable<a name="line.715"></a>
+<span class="sourceLineNo">716</span>     * objects to be returned before allowing another one to be borrowed with<a name="line.716"></a>
+<span class="sourceLineNo">717</span>     * another layer of synchronization will cause liveliness issues or a<a name="line.717"></a>
+<span class="sourceLineNo">718</span>     * deadlock.<a name="line.718"></a>
+<span class="sourceLineNo">719</span>     * &lt;/p&gt;<a name="line.719"></a>
+<span class="sourceLineNo">720</span>     */<a name="line.720"></a>
+<span class="sourceLineNo">721</span>    private static class SynchronizedObjectPool&lt;T&gt; implements ObjectPool&lt;T&gt; {<a name="line.721"></a>
+<span class="sourceLineNo">722</span><a name="line.722"></a>
+<span class="sourceLineNo">723</span>        /**<a name="line.723"></a>
+<span class="sourceLineNo">724</span>         * Object whose monitor is used to synchronize methods on the wrapped<a name="line.724"></a>
+<span class="sourceLineNo">725</span>         * pool.<a name="line.725"></a>
+<span class="sourceLineNo">726</span>         */<a name="line.726"></a>
+<span class="sourceLineNo">727</span>        private final ReentrantReadWriteLock readWriteLock = new ReentrantReadWriteLock();<a name="line.727"></a>
+<span class="sourceLineNo">728</span><a name="line.728"></a>
+<span class="sourceLineNo">729</span>        /** the underlying object pool */<a name="line.729"></a>
+<span class="sourceLineNo">730</span>        private final ObjectPool&lt;T&gt; pool;<a name="line.730"></a>
+<span class="sourceLineNo">731</span><a name="line.731"></a>
+<span class="sourceLineNo">732</span>        /**<a name="line.732"></a>
+<span class="sourceLineNo">733</span>         * Create a new SynchronizedObjectPool wrapping the given pool.<a name="line.733"></a>
+<span class="sourceLineNo">734</span>         *<a name="line.734"></a>
+<span class="sourceLineNo">735</span>         * @param pool<a name="line.735"></a>
+<span class="sourceLineNo">736</span>         *            the ObjectPool to be "wrapped" in a synchronized<a name="line.736"></a>
+<span class="sourceLineNo">737</span>         *            ObjectPool.<a name="line.737"></a>
+<span class="sourceLineNo">738</span>         * @throws IllegalArgumentException<a name="line.738"></a>
+<span class="sourceLineNo">739</span>         *             if the pool is null<a name="line.739"></a>
+<span class="sourceLineNo">740</span>         */<a name="line.740"></a>
+<span class="sourceLineNo">741</span>        SynchronizedObjectPool(final ObjectPool&lt;T&gt; pool)<a name="line.741"></a>
+<span class="sourceLineNo">742</span>                throws IllegalArgumentException {<a name="line.742"></a>
+<span class="sourceLineNo">743</span>            if (pool == null) {<a name="line.743"></a>
+<span class="sourceLineNo">744</span>                throw new IllegalArgumentException("pool must not be null.");<a name="line.744"></a>
+<span class="sourceLineNo">745</span>            }<a name="line.745"></a>
+<span class="sourceLineNo">746</span>            this.pool = pool;<a name="line.746"></a>
+<span class="sourceLineNo">747</span>        }<a name="line.747"></a>
+<span class="sourceLineNo">748</span><a name="line.748"></a>
+<span class="sourceLineNo">749</span>        /**<a name="line.749"></a>
+<span class="sourceLineNo">750</span>         * {@inheritDoc}<a name="line.750"></a>
+<span class="sourceLineNo">751</span>         */<a name="line.751"></a>
+<span class="sourceLineNo">752</span>        @Override<a name="line.752"></a>
+<span class="sourceLineNo">753</span>        public T borrowObject() throws Exception, NoSuchElementException,<a name="line.753"></a>
+<span class="sourceLineNo">754</span>                IllegalStateException {<a name="line.754"></a>
+<span class="sourceLineNo">755</span>            WriteLock writeLock = readWriteLock.writeLock();<a name="line.755"></a>
+<span class="sourceLineNo">756</span>            writeLock.lock();<a name="line.756"></a>
+<span class="sourceLineNo">757</span>            try {<a name="line.757"></a>
+<span class="sourceLineNo">758</span>                return pool.borrowObject();<a name="line.758"></a>
+<span class="sourceLineNo">759</span>            } finally {<a name="line.759"></a>
+<span class="sourceLineNo">760</span>                writeLock.unlock();<a name="line.760"></a>
+<span class="sourceLineNo">761</span>            }<a name="line.761"></a>
+<span class="sourceLineNo">762</span>        }<a name="line.762"></a>
+<span class="sourceLineNo">763</span><a name="line.763"></a>
+<span class="sourceLineNo">764</span>        /**<a name="line.764"></a>
+<span class="sourceLineNo">765</span>         * {@inheritDoc}<a name="line.765"></a>
+<span class="sourceLineNo">766</span>         */<a name="line.766"></a>
+<span class="sourceLineNo">767</span>        @Override<a name="line.767"></a>
+<span class="sourceLineNo">768</span>        public void returnObject(final T obj) {<a name="line.768"></a>
+<span class="sourceLineNo">769</span>            WriteLock writeLock = readWriteLock.writeLock();<a name="line.769"></a>
+<span class="sourceLineNo">770</span>            writeLock.lock();<a name="line.770"></a>
+<span class="sourceLineNo">771</span>            try {<a name="line.771"></a>
+<span class="sourceLineNo">772</span>                pool.returnObject(obj);<a name="line.772"></a>
+<span class="sourceLineNo">773</span>            } catch (Exception e) {<a name="line.773"></a>
+<span class="sourceLineNo">774</span>                // swallowed as of Pool 2<a name="line.774"></a>
+<span class="sourceLineNo">775</span>            } finally {<a name="line.775"></a>
+<span class="sourceLineNo">776</span>                writeLock.unlock();<a name="line.776"></a>
+<span class="sourceLineNo">777</span>            }<a name="line.777"></a>
+<span class="sourceLineNo">778</span>        }<a name="line.778"></a>
+<span class="sourceLineNo">779</span><a name="line.779"></a>
+<span class="sourceLineNo">780</span>        /**<a name="line.780"></a>
+<span class="sourceLineNo">781</span>         * {@inheritDoc}<a name="line.781"></a>
+<span class="sourceLineNo">782</span>         */<a name="line.782"></a>
+<span class="sourceLineNo">783</span>        @Override<a name="line.783"></a>
+<span class="sourceLineNo">784</span>        public void invalidateObject(final T obj) {<a name="line.784"></a>
+<span class="sourceLineNo">785</span>            WriteLock writeLock = readWriteLock.writeLock();<a name="line.785"></a>
+<span class="sourceLineNo">786</span>            writeLock.lock();<a name="line.786"></a>
+<span class="sourceLineNo">787</span>            try {<a name="line.787"></a>
+<span class="sourceLineNo">788</span>                pool.invalidateObject(obj);<a name="line.788"></a>
+<span class="sourceLineNo">789</span>            } catch (Exception e) {<a name="line.789"></a>
+<span class="sourceLineNo">790</span>                // swallowed as of Pool 2<a name="line.790"></a>
+<span class="sourceLineNo">791</span>            } finally {<a name="line.791"></a>
+<span class="sourceLineNo">792</span>                writeLock.unlock();<a name="line.792"></a>
+<span class="sourceLineNo">793</span>            }<a name="line.793"></a>
+<span class="sourceLineNo">794</span>        }<a name="line.794"></a>
+<span class="sourceLineNo">795</span><a name="line.795"></a>
+<span class="sourceLineNo">796</span>        /**<a name="line.796"></a>
+<span class="sourceLineNo">797</span>         * {@inheritDoc}<a name="line.797"></a>
+<span class="sourceLineNo">798</span>         */<a name="line.798"></a>
+<span class="sourceLineNo">799</span>        @Override<a name="line.799"></a>
+<span class="sourceLineNo">800</span>        public void addObject() throws Exception, IllegalStateException,<a name="line.800"></a>
+<span class="sourceLineNo">801</span>                UnsupportedOperationException {<a name="line.801"></a>
+<span class="sourceLineNo">802</span>            WriteLock writeLock = readWriteLock.writeLock();<a name="line.802"></a>
+<span class="sourceLineNo">803</span>            writeLock.lock();<a name="line.803"></a>
+<span class="sourceLineNo">804</span>            try {<a name="line.804"></a>
+<span class="sourceLineNo">805</span>                pool.addObject();<a name="line.805"></a>
+<span class="sourceLineNo">806</span>            } finally {<a name="line.806"></a>
+<span class="sourceLineNo">807</span>                writeLock.unlock();<a name="line.807"></a>
+<span class="sourceLineNo">808</span>            }<a name="line.808"></a>
+<span class="sourceLineNo">809</span>        }<a name="line.809"></a>
+<span class="sourceLineNo">810</span><a name="line.810"></a>
+<span class="sourceLineNo">811</span>        /**<a name="line.811"></a>
+<span class="sourceLineNo">812</span>         * {@inheritDoc}<a name="line.812"></a>
+<span class="sourceLineNo">813</span>         */<a name="line.813"></a>
+<span class="sourceLineNo">814</span>        @Override<a name="line.814"></a>
+<span class="sourceLineNo">815</span>        public int getNumIdle() {<a name="line.815"></a>
+<span class="sourceLineNo">816</span>            ReadLock readLock = readWriteLock.readLock();<a name="line.816"></a>
+<span class="sourceLineNo">817</span>            readLock.lock();<a name="line.817"></a>
+<span class="sourceLineNo">818</span>            try {<a name="line.818"></a>
+<span class="sourceLineNo">819</span>                return pool.getNumIdle();<a name="line.819"></a>
+<span class="sourceLineNo">820</span>            } finally {<a name="line.820"></a>
+<span class="sourceLineNo">821</span>                readLock.unlock();<a name="line.821"></a>
+<span class="sourceLineNo">822</span>            }<a name="line.822"></a>
+<span class="sourceLineNo">823</span>        }<a name="line.823"></a>
+<span class="sourceLineNo">824</span><a name="line.824"></a>
+<span class="sourceLineNo">825</span>        /**<a name="line.825"></a>
+<span class="sourceLineNo">826</span>         * {@inheritDoc}<a name="line.826"></a>
+<span class="sourceLineNo">827</span>         */<a name="line.827"></a>
+<span class="sourceLineNo">828</span>        @Override<a name="line.828"></a>
+<span class="sourceLineNo">829</span>        public int getNumActive() {<a name="line.829"></a>
+<span class="sourceLineNo">830</span>            ReadLock readLock = readWriteLock.readLock();<a name="line.830"></a>
+<span class="sourceLineNo">831</span>            readLock.lock();<a name="line.831"></a>
+<span class="sourceLineNo">832</span>            try {<a name="line.832"></a>
+<span class="sourceLineNo">833</span>                return pool.getNumActive();<a name="line.833"></a>
+<span class="sourceLineNo">834</span>            } finally {<a name="line.834"></a>
+<span class="sourceLineNo">835</span>                readLock.unlock();<a name="line.835"></a>
+<span class="sourceLineNo">836</span>            }<a name="line.836"></a>
+<span class="sourceLineNo">837</span>        }<a name="line.837"></a>
+<span class="sourceLineNo">838</span><a name="line.838"></a>
+<span class="sourceLineNo">839</span>        /**<a name="line.839"></a>
+<span class="sourceLineNo">840</span>         * {@inheritDoc}<a name="line.840"></a>
+<span class="sourceLineNo">841</span>         */<a name="line.841"></a>
+<span class="sourceLineNo">842</span>        @Override<a name="line.842"></a>
+<span class="sourceLineNo">843</span>        public void clear() throws Exception, UnsupportedOperationException {<a name="line.843"></a>
+<span class="sourceLineNo">844</span>            WriteLock writeLock = readWriteLock.writeLock();<a name="line.844"></a>
+<span class="sourceLineNo">845</span>            writeLock.lock();<a name="line.845"></a>
+<span class="sourceLineNo">846</span>            try {<a name="line.846"></a>
+<span class="sourceLineNo">847</span>                pool.clear();<a name="line.847"></a>
+<span class="sourceLineNo">848</span>            } finally {<a name="line.848"></a>
+<span class="sourceLineNo">849</span>                writeLock.unlock();<a name="line.849"></a>
+<span class="sourceLineNo">850</span>            }<a name="line.850"></a>
+<span class="sourceLineNo">851</span>        }<a name="line.851"></a>
+<span class="sourceLineNo">852</span><a name="line.852"></a>
+<span class="sourceLineNo">853</span>        /**<a name="line.853"></a>
+<span class="sourceLineNo">854</span>         * {@inheritDoc}<a name="line.854"></a>
+<span class="sourceLineNo">855</span>         */<a name="line.855"></a>
+<span class="sourceLineNo">856</span>        @Override<a name="line.856"></a>
+<span class="sourceLineNo">857</span>        public void close() {<a name="line.857"></a>
+<span class="sourceLineNo">858</span>            WriteLock writeLock = readWriteLock.writeLock();<a name="line.858"></a>
+<span class="sourceLineNo">859</span>            writeLock.lock();<a name="line.859"></a>
+<span class="sourceLineNo">860</span>            try {<a name="line.860"></a>
+<span class="sourceLineNo">861</span>                pool.close();<a name="line.861"></a>
+<span class="sourceLineNo">862</span>            } catch (Exception e) {<a name="line.862"></a>
+<span class="sourceLineNo">863</span>                // swallowed as of Pool 2<a name="line.863"></a>
+<span class="sourceLineNo">864</span>            } finally {<a name="line.864"></a>
+<span class="sourceLineNo">865</span>                writeLock.unlock();<a name="line.865"></a>
+<span class="sourceLineNo">866</span>            }<a name="line.866"></a>
+<span class="sourceLineNo">867</span>        }<a name="line.867"></a>
+<span class="sourceLineNo">868</span><a name="line.868"></a>
+<span class="sourceLineNo">869</span>        /**<a name="line.869"></a>
+<span class="sourceLineNo">870</span>         * {@inheritDoc}<a name="line.870"></a>
+<span class="sourceLineNo">871</span>         */<a name="line.871"></a>
+<span class="sourceLineNo">872</span>        @Override<a name="line.872"></a>
+<span class="sourceLineNo">873</span>        public String toString() {<a name="line.873"></a>
+<span class="sourceLineNo">874</span>            final StringBuilder sb = new StringBuilder();<a name="line.874"></a>
+<span class="sourceLineNo">875</span>            sb.append("SynchronizedObjectPool");<a name="line.875"></a>
+<span class="sourceLineNo">876</span>            sb.append("{pool=").append(pool);<a name="line.876"></a>
+<span class="sourceLineNo">877</span>            sb.append('}');<a name="line.877"></a>
+<span class="sourceLineNo">878</span>            return sb.toString();<a name="line.878"></a>
+<span class="sourceLineNo">879</span>        }<a name="line.879"></a>
+<span class="sourceLineNo">880</span>    }<a name="line.880"></a>
+<span class="sourceLineNo">881</span><a name="line.881"></a>
+<span class="sourceLineNo">882</span>    /**<a name="line.882"></a>
+<span class="sourceLineNo">883</span>     * A synchronized (thread-safe) KeyedObjectPool backed by the specified<a name="line.883"></a>
+<span class="sourceLineNo">884</span>     * KeyedObjectPool.<a name="line.884"></a>
+<span class="sourceLineNo">885</span>     * &lt;p&gt;<a name="line.885"></a>
+<span class="sourceLineNo">886</span>     * &lt;b&gt;Note:&lt;/b&gt; This should not be used on pool implementations that already<a name="line.886"></a>
+<span class="sourceLineNo">887</span>     * provide proper synchronization such as the pools provided in the Commons<a name="line.887"></a>

[... 981 lines stripped ...]