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Posted to notifications@commons.apache.org by gg...@apache.org on 2020/09/29 15:33:20 UTC
svn commit: r1066218 [7/31] - in
/websites/production/commons/content/proper/commons-pool: ./ apidocs/
apidocs/org/apache/commons/pool2/ apidocs/org/apache/commons/pool2/class-use/
apidocs/org/apache/commons/pool2/impl/ apidocs/org/apache/commons/pool2...
Modified: websites/production/commons/content/proper/commons-pool/apidocs/src-html/org/apache/commons/pool2/impl/GenericObjectPool.html
==============================================================================
--- websites/production/commons/content/proper/commons-pool/apidocs/src-html/org/apache/commons/pool2/impl/GenericObjectPool.html (original)
+++ websites/production/commons/content/proper/commons-pool/apidocs/src-html/org/apache/commons/pool2/impl/GenericObjectPool.html Tue Sep 29 15:33:18 2020
@@ -24,1204 +24,1225 @@
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span>package org.apache.commons.pool2.impl;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
-<span class="sourceLineNo">019</span>import org.apache.commons.pool2.ObjectPool;<a name="line.19"></a>
-<span class="sourceLineNo">020</span>import org.apache.commons.pool2.PoolUtils;<a name="line.20"></a>
-<span class="sourceLineNo">021</span>import org.apache.commons.pool2.PooledObject;<a name="line.21"></a>
-<span class="sourceLineNo">022</span>import org.apache.commons.pool2.PooledObjectFactory;<a name="line.22"></a>
-<span class="sourceLineNo">023</span>import org.apache.commons.pool2.PooledObjectState;<a name="line.23"></a>
-<span class="sourceLineNo">024</span>import org.apache.commons.pool2.SwallowedExceptionListener;<a name="line.24"></a>
-<span class="sourceLineNo">025</span>import org.apache.commons.pool2.TrackedUse;<a name="line.25"></a>
-<span class="sourceLineNo">026</span>import org.apache.commons.pool2.UsageTracking;<a name="line.26"></a>
-<span class="sourceLineNo">027</span><a name="line.27"></a>
-<span class="sourceLineNo">028</span>import java.util.ArrayList;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import java.util.HashSet;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import java.util.Iterator;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import java.util.Map;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import java.util.NoSuchElementException;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import java.util.Set;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import java.util.concurrent.TimeUnit;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.36"></a>
-<span class="sourceLineNo">037</span><a name="line.37"></a>
-<span class="sourceLineNo">038</span>/**<a name="line.38"></a>
-<span class="sourceLineNo">039</span> * A configurable {@link ObjectPool} implementation.<a name="line.39"></a>
-<span class="sourceLineNo">040</span> * <p><a name="line.40"></a>
-<span class="sourceLineNo">041</span> * When coupled with the appropriate {@link PooledObjectFactory},<a name="line.41"></a>
-<span class="sourceLineNo">042</span> * {@code GenericObjectPool} provides robust pooling functionality for<a name="line.42"></a>
-<span class="sourceLineNo">043</span> * arbitrary objects.<a name="line.43"></a>
-<span class="sourceLineNo">044</span> * </p><a name="line.44"></a>
-<span class="sourceLineNo">045</span> * <p><a name="line.45"></a>
-<span class="sourceLineNo">046</span> * Optionally, one may configure the pool to examine and possibly evict objects<a name="line.46"></a>
-<span class="sourceLineNo">047</span> * as they sit idle in the pool and to ensure that a minimum number of idle<a name="line.47"></a>
-<span class="sourceLineNo">048</span> * objects are available. This is performed by an "idle object eviction" thread,<a name="line.48"></a>
-<span class="sourceLineNo">049</span> * which runs asynchronously. Caution should be used when configuring this<a name="line.49"></a>
-<span class="sourceLineNo">050</span> * optional feature. Eviction runs contend with client threads for access to<a name="line.50"></a>
-<span class="sourceLineNo">051</span> * objects in the pool, so if they run too frequently performance issues may<a name="line.51"></a>
-<span class="sourceLineNo">052</span> * result.<a name="line.52"></a>
-<span class="sourceLineNo">053</span> * </p><a name="line.53"></a>
-<span class="sourceLineNo">054</span> * <p><a name="line.54"></a>
-<span class="sourceLineNo">055</span> * The pool can also be configured to detect and remove "abandoned" objects,<a name="line.55"></a>
-<span class="sourceLineNo">056</span> * i.e. objects that have been checked out of the pool but neither used nor<a name="line.56"></a>
-<span class="sourceLineNo">057</span> * returned before the configured<a name="line.57"></a>
-<span class="sourceLineNo">058</span> * {@link AbandonedConfig#getRemoveAbandonedTimeout() removeAbandonedTimeout}.<a name="line.58"></a>
-<span class="sourceLineNo">059</span> * Abandoned object removal can be configured to happen when<a name="line.59"></a>
-<span class="sourceLineNo">060</span> * {@code borrowObject} is invoked and the pool is close to starvation, or<a name="line.60"></a>
-<span class="sourceLineNo">061</span> * it can be executed by the idle object evictor, or both. If pooled objects<a name="line.61"></a>
-<span class="sourceLineNo">062</span> * implement the {@link TrackedUse} interface, their last use will be queried<a name="line.62"></a>
-<span class="sourceLineNo">063</span> * using the {@code getLastUsed} method on that interface; otherwise<a name="line.63"></a>
-<span class="sourceLineNo">064</span> * abandonment is determined by how long an object has been checked out from<a name="line.64"></a>
-<span class="sourceLineNo">065</span> * the pool.<a name="line.65"></a>
-<span class="sourceLineNo">066</span> * </p><a name="line.66"></a>
-<span class="sourceLineNo">067</span> * <p><a name="line.67"></a>
-<span class="sourceLineNo">068</span> * Implementation note: To prevent possible deadlocks, care has been taken to<a name="line.68"></a>
-<span class="sourceLineNo">069</span> * ensure that no call to a factory method will occur within a synchronization<a name="line.69"></a>
-<span class="sourceLineNo">070</span> * block. See POOL-125 and DBCP-44 for more information.<a name="line.70"></a>
-<span class="sourceLineNo">071</span> * </p><a name="line.71"></a>
-<span class="sourceLineNo">072</span> * <p><a name="line.72"></a>
-<span class="sourceLineNo">073</span> * This class is intended to be thread-safe.<a name="line.73"></a>
-<span class="sourceLineNo">074</span> * </p><a name="line.74"></a>
-<span class="sourceLineNo">075</span> *<a name="line.75"></a>
-<span class="sourceLineNo">076</span> * @see GenericKeyedObjectPool<a name="line.76"></a>
-<span class="sourceLineNo">077</span> *<a name="line.77"></a>
-<span class="sourceLineNo">078</span> * @param <T> Type of element pooled in this pool.<a name="line.78"></a>
-<span class="sourceLineNo">079</span> *<a name="line.79"></a>
-<span class="sourceLineNo">080</span> * @since 2.0<a name="line.80"></a>
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-<span class="sourceLineNo">082</span>public class GenericObjectPool<T> extends BaseGenericObjectPool<T><a name="line.82"></a>
-<span class="sourceLineNo">083</span> implements ObjectPool<T>, GenericObjectPoolMXBean, UsageTracking<T> {<a name="line.83"></a>
-<span class="sourceLineNo">084</span><a name="line.84"></a>
-<span class="sourceLineNo">085</span> /**<a name="line.85"></a>
-<span class="sourceLineNo">086</span> * Creates a new {@code GenericObjectPool} using defaults from<a name="line.86"></a>
-<span class="sourceLineNo">087</span> * {@link GenericObjectPoolConfig}.<a name="line.87"></a>
-<span class="sourceLineNo">088</span> *<a name="line.88"></a>
-<span class="sourceLineNo">089</span> * @param factory The object factory to be used to create object instances<a name="line.89"></a>
-<span class="sourceLineNo">090</span> * used by this pool<a name="line.90"></a>
-<span class="sourceLineNo">091</span> */<a name="line.91"></a>
-<span class="sourceLineNo">092</span> public GenericObjectPool(final PooledObjectFactory<T> factory) {<a name="line.92"></a>
-<span class="sourceLineNo">093</span> this(factory, new GenericObjectPoolConfig<T>());<a name="line.93"></a>
-<span class="sourceLineNo">094</span> }<a name="line.94"></a>
-<span class="sourceLineNo">095</span><a name="line.95"></a>
-<span class="sourceLineNo">096</span> /**<a name="line.96"></a>
-<span class="sourceLineNo">097</span> * Creates a new {@code GenericObjectPool} using a specific<a name="line.97"></a>
-<span class="sourceLineNo">098</span> * configuration.<a name="line.98"></a>
-<span class="sourceLineNo">099</span> *<a name="line.99"></a>
-<span class="sourceLineNo">100</span> * @param factory The object factory to be used to create object instances<a name="line.100"></a>
-<span class="sourceLineNo">101</span> * used by this pool<a name="line.101"></a>
-<span class="sourceLineNo">102</span> * @param config The configuration to use for this pool instance. The<a name="line.102"></a>
-<span class="sourceLineNo">103</span> * configuration is used by value. Subsequent changes to<a name="line.103"></a>
-<span class="sourceLineNo">104</span> * the configuration object will not be reflected in the<a name="line.104"></a>
-<span class="sourceLineNo">105</span> * pool.<a name="line.105"></a>
-<span class="sourceLineNo">106</span> */<a name="line.106"></a>
-<span class="sourceLineNo">107</span> public GenericObjectPool(final PooledObjectFactory<T> factory,<a name="line.107"></a>
-<span class="sourceLineNo">108</span> final GenericObjectPoolConfig<T> config) {<a name="line.108"></a>
-<span class="sourceLineNo">109</span><a name="line.109"></a>
-<span class="sourceLineNo">110</span> super(config, ONAME_BASE, config.getJmxNamePrefix());<a name="line.110"></a>
-<span class="sourceLineNo">111</span><a name="line.111"></a>
-<span class="sourceLineNo">112</span> if (factory == null) {<a name="line.112"></a>
-<span class="sourceLineNo">113</span> jmxUnregister(); // tidy up<a name="line.113"></a>
-<span class="sourceLineNo">114</span> throw new IllegalArgumentException("factory may not be null");<a name="line.114"></a>
-<span class="sourceLineNo">115</span> }<a name="line.115"></a>
-<span class="sourceLineNo">116</span> this.factory = factory;<a name="line.116"></a>
-<span class="sourceLineNo">117</span><a name="line.117"></a>
-<span class="sourceLineNo">118</span> idleObjects = new LinkedBlockingDeque<>(config.getFairness());<a name="line.118"></a>
-<span class="sourceLineNo">119</span><a name="line.119"></a>
-<span class="sourceLineNo">120</span> setConfig(config);<a name="line.120"></a>
-<span class="sourceLineNo">121</span> }<a name="line.121"></a>
-<span class="sourceLineNo">122</span><a name="line.122"></a>
-<span class="sourceLineNo">123</span> /**<a name="line.123"></a>
-<span class="sourceLineNo">124</span> * Creates a new {@code GenericObjectPool} that tracks and destroys<a name="line.124"></a>
-<span class="sourceLineNo">125</span> * objects that are checked out, but never returned to the pool.<a name="line.125"></a>
-<span class="sourceLineNo">126</span> *<a name="line.126"></a>
-<span class="sourceLineNo">127</span> * @param factory The object factory to be used to create object instances<a name="line.127"></a>
-<span class="sourceLineNo">128</span> * used by this pool<a name="line.128"></a>
-<span class="sourceLineNo">129</span> * @param config The base pool configuration to use for this pool instance.<a name="line.129"></a>
-<span class="sourceLineNo">130</span> * The configuration is used by value. Subsequent changes to<a name="line.130"></a>
-<span class="sourceLineNo">131</span> * the configuration object will not be reflected in the<a name="line.131"></a>
-<span class="sourceLineNo">132</span> * pool.<a name="line.132"></a>
-<span class="sourceLineNo">133</span> * @param abandonedConfig Configuration for abandoned object identification<a name="line.133"></a>
-<span class="sourceLineNo">134</span> * and removal. The configuration is used by value.<a name="line.134"></a>
-<span class="sourceLineNo">135</span> */<a name="line.135"></a>
-<span class="sourceLineNo">136</span> public GenericObjectPool(final PooledObjectFactory<T> factory,<a name="line.136"></a>
-<span class="sourceLineNo">137</span> final GenericObjectPoolConfig<T> config, final AbandonedConfig abandonedConfig) {<a name="line.137"></a>
-<span class="sourceLineNo">138</span> this(factory, config);<a name="line.138"></a>
-<span class="sourceLineNo">139</span> setAbandonedConfig(abandonedConfig);<a name="line.139"></a>
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-<span class="sourceLineNo">141</span><a name="line.141"></a>
-<span class="sourceLineNo">142</span> /**<a name="line.142"></a>
-<span class="sourceLineNo">143</span> * Returns the cap on the number of "idle" instances in the pool. If maxIdle<a name="line.143"></a>
-<span class="sourceLineNo">144</span> * is set too low on heavily loaded systems it is possible you will see<a name="line.144"></a>
-<span class="sourceLineNo">145</span> * objects being destroyed and almost immediately new objects being created.<a name="line.145"></a>
-<span class="sourceLineNo">146</span> * This is a result of the active threads momentarily returning objects<a name="line.146"></a>
-<span class="sourceLineNo">147</span> * faster than they are requesting them, causing the number of idle<a name="line.147"></a>
-<span class="sourceLineNo">148</span> * objects to rise above maxIdle. The best value for maxIdle for heavily<a name="line.148"></a>
-<span class="sourceLineNo">149</span> * loaded system will vary but the default is a good starting point.<a name="line.149"></a>
-<span class="sourceLineNo">150</span> *<a name="line.150"></a>
-<span class="sourceLineNo">151</span> * @return the maximum number of "idle" instances that can be held in the<a name="line.151"></a>
-<span class="sourceLineNo">152</span> * pool or a negative value if there is no limit<a name="line.152"></a>
-<span class="sourceLineNo">153</span> *<a name="line.153"></a>
-<span class="sourceLineNo">154</span> * @see #setMaxIdle<a name="line.154"></a>
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-<span class="sourceLineNo">156</span> @Override<a name="line.156"></a>
-<span class="sourceLineNo">157</span> public int getMaxIdle() {<a name="line.157"></a>
-<span class="sourceLineNo">158</span> return maxIdle;<a name="line.158"></a>
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-<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> * Returns the cap on the number of "idle" instances in the pool. If maxIdle<a name="line.162"></a>
-<span class="sourceLineNo">163</span> * is set too low on heavily loaded systems it is possible you will see<a name="line.163"></a>
-<span class="sourceLineNo">164</span> * objects being destroyed and almost immediately new objects being created.<a name="line.164"></a>
-<span class="sourceLineNo">165</span> * This is a result of the active threads momentarily returning objects<a name="line.165"></a>
-<span class="sourceLineNo">166</span> * faster than they are requesting them, causing the number of idle<a name="line.166"></a>
-<span class="sourceLineNo">167</span> * objects to rise above maxIdle. The best value for maxIdle for heavily<a name="line.167"></a>
-<span class="sourceLineNo">168</span> * loaded system will vary but the default is a good starting point.<a name="line.168"></a>
-<span class="sourceLineNo">169</span> *<a name="line.169"></a>
-<span class="sourceLineNo">170</span> * @param maxIdle<a name="line.170"></a>
-<span class="sourceLineNo">171</span> * The cap on the number of "idle" instances in the pool. Use a<a name="line.171"></a>
-<span class="sourceLineNo">172</span> * negative value to indicate an unlimited number of idle<a name="line.172"></a>
-<span class="sourceLineNo">173</span> * instances<a name="line.173"></a>
-<span class="sourceLineNo">174</span> *<a name="line.174"></a>
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-<span class="sourceLineNo">181</span> /**<a name="line.181"></a>
-<span class="sourceLineNo">182</span> * Sets the target for the minimum number of idle objects to maintain in<a name="line.182"></a>
-<span class="sourceLineNo">183</span> * the pool. This setting only has an effect if it is positive and<a name="line.183"></a>
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-<span class="sourceLineNo">185</span> * is the case, an attempt is made to ensure that the pool has the required<a name="line.185"></a>
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-<span class="sourceLineNo">187</span> * <p><a name="line.187"></a>
-<span class="sourceLineNo">188</span> * If the configured value of minIdle is greater than the configured value<a name="line.188"></a>
-<span class="sourceLineNo">189</span> * for maxIdle then the value of maxIdle will be used instead.<a name="line.189"></a>
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-<span class="sourceLineNo">191</span> *<a name="line.191"></a>
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-<span class="sourceLineNo">193</span> * The minimum number of objects.<a name="line.193"></a>
-<span class="sourceLineNo">194</span> *<a name="line.194"></a>
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-<span class="sourceLineNo">231</span> *<a name="line.231"></a>
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-<span class="sourceLineNo">245</span> *<a name="line.245"></a>
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-<span class="sourceLineNo">255</span> * Gets whether a check is made for abandoned objects when an object is borrowed<a name="line.255"></a>
-<span class="sourceLineNo">256</span> * from this pool.<a name="line.256"></a>
-<span class="sourceLineNo">257</span> *<a name="line.257"></a>
-<span class="sourceLineNo">258</span> * @return {@code true} if abandoned object removal is configured to be<a name="line.258"></a>
-<span class="sourceLineNo">259</span> * activated by borrowObject otherwise {@code false}<a name="line.259"></a>
-<span class="sourceLineNo">260</span> *<a name="line.260"></a>
-<span class="sourceLineNo">261</span> * @see AbandonedConfig#getRemoveAbandonedOnBorrow()<a name="line.261"></a>
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-<span class="sourceLineNo">263</span> @Override<a name="line.263"></a>
-<span class="sourceLineNo">264</span> public boolean getRemoveAbandonedOnBorrow() {<a name="line.264"></a>
-<span class="sourceLineNo">265</span> final AbandonedConfig ac = this.abandonedConfig;<a name="line.265"></a>
-<span class="sourceLineNo">266</span> return ac != null && ac.getRemoveAbandonedOnBorrow();<a name="line.266"></a>
-<span class="sourceLineNo">267</span> }<a name="line.267"></a>
-<span class="sourceLineNo">268</span><a name="line.268"></a>
-<span class="sourceLineNo">269</span> /**<a name="line.269"></a>
-<span class="sourceLineNo">270</span> * Gets whether a check is made for abandoned objects when the evictor runs.<a name="line.270"></a>
-<span class="sourceLineNo">271</span> *<a name="line.271"></a>
-<span class="sourceLineNo">272</span> * @return {@code true} if abandoned object removal is configured to be<a name="line.272"></a>
-<span class="sourceLineNo">273</span> * activated when the evictor runs otherwise {@code false}<a name="line.273"></a>
-<span class="sourceLineNo">274</span> *<a name="line.274"></a>
-<span class="sourceLineNo">275</span> * @see AbandonedConfig#getRemoveAbandonedOnMaintenance()<a name="line.275"></a>
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-<span class="sourceLineNo">277</span> @Override<a name="line.277"></a>
-<span class="sourceLineNo">278</span> public boolean getRemoveAbandonedOnMaintenance() {<a name="line.278"></a>
-<span class="sourceLineNo">279</span> final AbandonedConfig ac = this.abandonedConfig;<a name="line.279"></a>
-<span class="sourceLineNo">280</span> return ac != null && ac.getRemoveAbandonedOnMaintenance();<a name="line.280"></a>
-<span class="sourceLineNo">281</span> }<a name="line.281"></a>
-<span class="sourceLineNo">282</span><a name="line.282"></a>
-<span class="sourceLineNo">283</span> /**<a name="line.283"></a>
-<span class="sourceLineNo">284</span> * Obtains the timeout before which an object will be considered to be<a name="line.284"></a>
-<span class="sourceLineNo">285</span> * abandoned by this pool.<a name="line.285"></a>
-<span class="sourceLineNo">286</span> *<a name="line.286"></a>
-<span class="sourceLineNo">287</span> * @return The abandoned object timeout in seconds if abandoned object<a name="line.287"></a>
-<span class="sourceLineNo">288</span> * removal is configured for this pool; Integer.MAX_VALUE otherwise.<a name="line.288"></a>
-<span class="sourceLineNo">289</span> *<a name="line.289"></a>
-<span class="sourceLineNo">290</span> * @see AbandonedConfig#getRemoveAbandonedTimeout()<a name="line.290"></a>
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-<span class="sourceLineNo">292</span> @Override<a name="line.292"></a>
-<span class="sourceLineNo">293</span> public int getRemoveAbandonedTimeout() {<a name="line.293"></a>
-<span class="sourceLineNo">294</span> final AbandonedConfig ac = this.abandonedConfig;<a name="line.294"></a>
-<span class="sourceLineNo">295</span> return ac != null ? ac.getRemoveAbandonedTimeout() : Integer.MAX_VALUE;<a name="line.295"></a>
-<span class="sourceLineNo">296</span> }<a name="line.296"></a>
-<span class="sourceLineNo">297</span><a name="line.297"></a>
+<span class="sourceLineNo">019</span>import org.apache.commons.pool2.DestroyMode;<a name="line.19"></a>
+<span class="sourceLineNo">020</span>import org.apache.commons.pool2.ObjectPool;<a name="line.20"></a>
+<span class="sourceLineNo">021</span>import org.apache.commons.pool2.PoolUtils;<a name="line.21"></a>
+<span class="sourceLineNo">022</span>import org.apache.commons.pool2.PooledObject;<a name="line.22"></a>
+<span class="sourceLineNo">023</span>import org.apache.commons.pool2.PooledObjectFactory;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import org.apache.commons.pool2.PooledObjectState;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import org.apache.commons.pool2.SwallowedExceptionListener;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import org.apache.commons.pool2.TrackedUse;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.commons.pool2.UsageTracking;<a name="line.27"></a>
+<span class="sourceLineNo">028</span><a name="line.28"></a>
+<span class="sourceLineNo">029</span>import java.util.ArrayList;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import java.util.HashSet;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import java.util.Iterator;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import java.util.Map;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import java.util.NoSuchElementException;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import java.util.Set;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import java.util.concurrent.TimeUnit;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import java.util.concurrent.atomic.AtomicLong;<a name="line.37"></a>
+<span class="sourceLineNo">038</span><a name="line.38"></a>
+<span class="sourceLineNo">039</span>/**<a name="line.39"></a>
+<span class="sourceLineNo">040</span> * A configurable {@link ObjectPool} implementation.<a name="line.40"></a>
+<span class="sourceLineNo">041</span> * <p><a name="line.41"></a>
+<span class="sourceLineNo">042</span> * When coupled with the appropriate {@link PooledObjectFactory},<a name="line.42"></a>
+<span class="sourceLineNo">043</span> * {@code GenericObjectPool} provides robust pooling functionality for<a name="line.43"></a>
+<span class="sourceLineNo">044</span> * arbitrary objects.<a name="line.44"></a>
+<span class="sourceLineNo">045</span> * </p><a name="line.45"></a>
+<span class="sourceLineNo">046</span> * <p><a name="line.46"></a>
+<span class="sourceLineNo">047</span> * Optionally, one may configure the pool to examine and possibly evict objects<a name="line.47"></a>
+<span class="sourceLineNo">048</span> * as they sit idle in the pool and to ensure that a minimum number of idle<a name="line.48"></a>
+<span class="sourceLineNo">049</span> * objects are available. This is performed by an "idle object eviction" thread,<a name="line.49"></a>
+<span class="sourceLineNo">050</span> * which runs asynchronously. Caution should be used when configuring this<a name="line.50"></a>
+<span class="sourceLineNo">051</span> * optional feature. Eviction runs contend with client threads for access to<a name="line.51"></a>
+<span class="sourceLineNo">052</span> * objects in the pool, so if they run too frequently performance issues may<a name="line.52"></a>
+<span class="sourceLineNo">053</span> * result.<a name="line.53"></a>
+<span class="sourceLineNo">054</span> * </p><a name="line.54"></a>
+<span class="sourceLineNo">055</span> * <p><a name="line.55"></a>
+<span class="sourceLineNo">056</span> * The pool can also be configured to detect and remove "abandoned" objects,<a name="line.56"></a>
+<span class="sourceLineNo">057</span> * i.e. objects that have been checked out of the pool but neither used nor<a name="line.57"></a>
+<span class="sourceLineNo">058</span> * returned before the configured<a name="line.58"></a>
+<span class="sourceLineNo">059</span> * {@link AbandonedConfig#getRemoveAbandonedTimeout() removeAbandonedTimeout}.<a name="line.59"></a>
+<span class="sourceLineNo">060</span> * Abandoned object removal can be configured to happen when<a name="line.60"></a>
+<span class="sourceLineNo">061</span> * {@code borrowObject} is invoked and the pool is close to starvation, or<a name="line.61"></a>
+<span class="sourceLineNo">062</span> * it can be executed by the idle object evictor, or both. If pooled objects<a name="line.62"></a>
+<span class="sourceLineNo">063</span> * implement the {@link TrackedUse} interface, their last use will be queried<a name="line.63"></a>
+<span class="sourceLineNo">064</span> * using the {@code getLastUsed} method on that interface; otherwise<a name="line.64"></a>
+<span class="sourceLineNo">065</span> * abandonment is determined by how long an object has been checked out from<a name="line.65"></a>
+<span class="sourceLineNo">066</span> * the pool.<a name="line.66"></a>
+<span class="sourceLineNo">067</span> * </p><a name="line.67"></a>
+<span class="sourceLineNo">068</span> * <p><a name="line.68"></a>
+<span class="sourceLineNo">069</span> * Implementation note: To prevent possible deadlocks, care has been taken to<a name="line.69"></a>
+<span class="sourceLineNo">070</span> * ensure that no call to a factory method will occur within a synchronization<a name="line.70"></a>
+<span class="sourceLineNo">071</span> * block. See POOL-125 and DBCP-44 for more information.<a name="line.71"></a>
+<span class="sourceLineNo">072</span> * </p><a name="line.72"></a>
+<span class="sourceLineNo">073</span> * <p><a name="line.73"></a>
+<span class="sourceLineNo">074</span> * This class is intended to be thread-safe.<a name="line.74"></a>
+<span class="sourceLineNo">075</span> * </p><a name="line.75"></a>
+<span class="sourceLineNo">076</span> *<a name="line.76"></a>
+<span class="sourceLineNo">077</span> * @see GenericKeyedObjectPool<a name="line.77"></a>
+<span class="sourceLineNo">078</span> *<a name="line.78"></a>
+<span class="sourceLineNo">079</span> * @param <T> Type of element pooled in this pool.<a name="line.79"></a>
+<span class="sourceLineNo">080</span> *<a name="line.80"></a>
+<span class="sourceLineNo">081</span> * @since 2.0<a name="line.81"></a>
+<span class="sourceLineNo">082</span> */<a name="line.82"></a>
+<span class="sourceLineNo">083</span>public class GenericObjectPool<T> extends BaseGenericObjectPool<T><a name="line.83"></a>
+<span class="sourceLineNo">084</span> implements ObjectPool<T>, GenericObjectPoolMXBean, UsageTracking<T> {<a name="line.84"></a>
+<span class="sourceLineNo">085</span><a name="line.85"></a>
+<span class="sourceLineNo">086</span> /**<a name="line.86"></a>
+<span class="sourceLineNo">087</span> * Creates a new {@code GenericObjectPool} using defaults from<a name="line.87"></a>
+<span class="sourceLineNo">088</span> * {@link GenericObjectPoolConfig}.<a name="line.88"></a>
+<span class="sourceLineNo">089</span> *<a name="line.89"></a>
+<span class="sourceLineNo">090</span> * @param factory The object factory to be used to create object instances<a name="line.90"></a>
+<span class="sourceLineNo">091</span> * used by this pool<a name="line.91"></a>
+<span class="sourceLineNo">092</span> */<a name="line.92"></a>
+<span class="sourceLineNo">093</span> public GenericObjectPool(final PooledObjectFactory<T> factory) {<a name="line.93"></a>
+<span class="sourceLineNo">094</span> this(factory, new GenericObjectPoolConfig<T>());<a name="line.94"></a>
+<span class="sourceLineNo">095</span> }<a name="line.95"></a>
+<span class="sourceLineNo">096</span><a name="line.96"></a>
+<span class="sourceLineNo">097</span> /**<a name="line.97"></a>
+<span class="sourceLineNo">098</span> * Creates a new {@code GenericObjectPool} using a specific<a name="line.98"></a>
+<span class="sourceLineNo">099</span> * configuration.<a name="line.99"></a>
+<span class="sourceLineNo">100</span> *<a name="line.100"></a>
+<span class="sourceLineNo">101</span> * @param factory The object factory to be used to create object instances<a name="line.101"></a>
+<span class="sourceLineNo">102</span> * used by this pool<a name="line.102"></a>
+<span class="sourceLineNo">103</span> * @param config The configuration to use for this pool instance. The<a name="line.103"></a>
+<span class="sourceLineNo">104</span> * configuration is used by value. Subsequent changes to<a name="line.104"></a>
+<span class="sourceLineNo">105</span> * the configuration object will not be reflected in the<a name="line.105"></a>
+<span class="sourceLineNo">106</span> * pool.<a name="line.106"></a>
+<span class="sourceLineNo">107</span> */<a name="line.107"></a>
+<span class="sourceLineNo">108</span> public GenericObjectPool(final PooledObjectFactory<T> factory,<a name="line.108"></a>
+<span class="sourceLineNo">109</span> final GenericObjectPoolConfig<T> config) {<a name="line.109"></a>
+<span class="sourceLineNo">110</span><a name="line.110"></a>
+<span class="sourceLineNo">111</span> super(config, ONAME_BASE, config.getJmxNamePrefix());<a name="line.111"></a>
+<span class="sourceLineNo">112</span><a name="line.112"></a>
+<span class="sourceLineNo">113</span> if (factory == null) {<a name="line.113"></a>
+<span class="sourceLineNo">114</span> jmxUnregister(); // tidy up<a name="line.114"></a>
+<span class="sourceLineNo">115</span> throw new IllegalArgumentException("factory may not be null");<a name="line.115"></a>
+<span class="sourceLineNo">116</span> }<a name="line.116"></a>
+<span class="sourceLineNo">117</span> this.factory = factory;<a name="line.117"></a>
+<span class="sourceLineNo">118</span><a name="line.118"></a>
+<span class="sourceLineNo">119</span> idleObjects = new LinkedBlockingDeque<>(config.getFairness());<a name="line.119"></a>
+<span class="sourceLineNo">120</span><a name="line.120"></a>
+<span class="sourceLineNo">121</span> setConfig(config);<a name="line.121"></a>
+<span class="sourceLineNo">122</span> }<a name="line.122"></a>
+<span class="sourceLineNo">123</span><a name="line.123"></a>
+<span class="sourceLineNo">124</span> /**<a name="line.124"></a>
+<span class="sourceLineNo">125</span> * Creates a new {@code GenericObjectPool} that tracks and destroys<a name="line.125"></a>
+<span class="sourceLineNo">126</span> * objects that are checked out, but never returned to the pool.<a name="line.126"></a>
+<span class="sourceLineNo">127</span> *<a name="line.127"></a>
+<span class="sourceLineNo">128</span> * @param factory The object factory to be used to create object instances<a name="line.128"></a>
+<span class="sourceLineNo">129</span> * used by this pool<a name="line.129"></a>
+<span class="sourceLineNo">130</span> * @param config The base pool configuration to use for this pool instance.<a name="line.130"></a>
+<span class="sourceLineNo">131</span> * The configuration is used by value. Subsequent changes to<a name="line.131"></a>
+<span class="sourceLineNo">132</span> * the configuration object will not be reflected in the<a name="line.132"></a>
+<span class="sourceLineNo">133</span> * pool.<a name="line.133"></a>
+<span class="sourceLineNo">134</span> * @param abandonedConfig Configuration for abandoned object identification<a name="line.134"></a>
+<span class="sourceLineNo">135</span> * and removal. The configuration is used by value.<a name="line.135"></a>
+<span class="sourceLineNo">136</span> */<a name="line.136"></a>
+<span class="sourceLineNo">137</span> public GenericObjectPool(final PooledObjectFactory<T> factory,<a name="line.137"></a>
+<span class="sourceLineNo">138</span> final GenericObjectPoolConfig<T> config, final AbandonedConfig abandonedConfig) {<a name="line.138"></a>
+<span class="sourceLineNo">139</span> this(factory, config);<a name="line.139"></a>
+<span class="sourceLineNo">140</span> setAbandonedConfig(abandonedConfig);<a name="line.140"></a>
+<span class="sourceLineNo">141</span> }<a name="line.141"></a>
+<span class="sourceLineNo">142</span><a name="line.142"></a>
+<span class="sourceLineNo">143</span> /**<a name="line.143"></a>
+<span class="sourceLineNo">144</span> * Returns the cap on the number of "idle" instances in the pool. If maxIdle<a name="line.144"></a>
+<span class="sourceLineNo">145</span> * is set too low on heavily loaded systems it is possible you will see<a name="line.145"></a>
+<span class="sourceLineNo">146</span> * objects being destroyed and almost immediately new objects being created.<a name="line.146"></a>
+<span class="sourceLineNo">147</span> * This is a result of the active threads momentarily returning objects<a name="line.147"></a>
+<span class="sourceLineNo">148</span> * faster than they are requesting them, causing the number of idle<a name="line.148"></a>
+<span class="sourceLineNo">149</span> * objects to rise above maxIdle. The best value for maxIdle for heavily<a name="line.149"></a>
+<span class="sourceLineNo">150</span> * loaded system will vary but the default is a good starting point.<a name="line.150"></a>
+<span class="sourceLineNo">151</span> *<a name="line.151"></a>
+<span class="sourceLineNo">152</span> * @return the maximum number of "idle" instances that can be held in the<a name="line.152"></a>
+<span class="sourceLineNo">153</span> * pool or a negative value if there is no limit<a name="line.153"></a>
+<span class="sourceLineNo">154</span> *<a name="line.154"></a>
+<span class="sourceLineNo">155</span> * @see #setMaxIdle<a name="line.155"></a>
+<span class="sourceLineNo">156</span> */<a name="line.156"></a>
+<span class="sourceLineNo">157</span> @Override<a name="line.157"></a>
+<span class="sourceLineNo">158</span> public int getMaxIdle() {<a name="line.158"></a>
+<span class="sourceLineNo">159</span> return maxIdle;<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> /**<a name="line.162"></a>
+<span class="sourceLineNo">163</span> * Returns the cap on the number of "idle" instances in the pool. If maxIdle<a name="line.163"></a>
+<span class="sourceLineNo">164</span> * is set too low on heavily loaded systems it is possible you will see<a name="line.164"></a>
+<span class="sourceLineNo">165</span> * objects being destroyed and almost immediately new objects being created.<a name="line.165"></a>
+<span class="sourceLineNo">166</span> * This is a result of the active threads momentarily returning objects<a name="line.166"></a>
+<span class="sourceLineNo">167</span> * faster than they are requesting them, causing the number of idle<a name="line.167"></a>
+<span class="sourceLineNo">168</span> * objects to rise above maxIdle. The best value for maxIdle for heavily<a name="line.168"></a>
+<span class="sourceLineNo">169</span> * loaded system will vary but the default is a good starting point.<a name="line.169"></a>
+<span class="sourceLineNo">170</span> *<a name="line.170"></a>
+<span class="sourceLineNo">171</span> * @param maxIdle<a name="line.171"></a>
+<span class="sourceLineNo">172</span> * The cap on the number of "idle" instances in the pool. Use a<a name="line.172"></a>
+<span class="sourceLineNo">173</span> * negative value to indicate an unlimited number of idle<a name="line.173"></a>
+<span class="sourceLineNo">174</span> * instances<a name="line.174"></a>
+<span class="sourceLineNo">175</span> *<a name="line.175"></a>
+<span class="sourceLineNo">176</span> * @see #getMaxIdle<a name="line.176"></a>
+<span class="sourceLineNo">177</span> */<a name="line.177"></a>
+<span class="sourceLineNo">178</span> public void setMaxIdle(final int maxIdle) {<a name="line.178"></a>
+<span class="sourceLineNo">179</span> this.maxIdle = maxIdle;<a name="line.179"></a>
+<span class="sourceLineNo">180</span> }<a name="line.180"></a>
+<span class="sourceLineNo">181</span><a name="line.181"></a>
+<span class="sourceLineNo">182</span> /**<a name="line.182"></a>
+<span class="sourceLineNo">183</span> * Sets the target for the minimum number of idle objects to maintain in<a name="line.183"></a>
+<span class="sourceLineNo">184</span> * the pool. This setting only has an effect if it is positive and<a name="line.184"></a>
+<span class="sourceLineNo">185</span> * {@link #getTimeBetweenEvictionRunsMillis()} is greater than zero. If this<a name="line.185"></a>
+<span class="sourceLineNo">186</span> * is the case, an attempt is made to ensure that the pool has the required<a name="line.186"></a>
+<span class="sourceLineNo">187</span> * minimum number of instances during idle object eviction runs.<a name="line.187"></a>
+<span class="sourceLineNo">188</span> * <p><a name="line.188"></a>
+<span class="sourceLineNo">189</span> * If the configured value of minIdle is greater than the configured value<a name="line.189"></a>
+<span class="sourceLineNo">190</span> * for maxIdle then the value of maxIdle will be used instead.<a name="line.190"></a>
+<span class="sourceLineNo">191</span> * </p><a name="line.191"></a>
+<span class="sourceLineNo">192</span> *<a name="line.192"></a>
+<span class="sourceLineNo">193</span> * @param minIdle<a name="line.193"></a>
+<span class="sourceLineNo">194</span> * The minimum number of objects.<a name="line.194"></a>
+<span class="sourceLineNo">195</span> *<a name="line.195"></a>
+<span class="sourceLineNo">196</span> * @see #getMinIdle()<a name="line.196"></a>
+<span class="sourceLineNo">197</span> * @see #getMaxIdle()<a name="line.197"></a>
+<span class="sourceLineNo">198</span> * @see #getTimeBetweenEvictionRunsMillis()<a name="line.198"></a>
+<span class="sourceLineNo">199</span> */<a name="line.199"></a>
+<span class="sourceLineNo">200</span> public void setMinIdle(final int minIdle) {<a name="line.200"></a>
+<span class="sourceLineNo">201</span> this.minIdle = minIdle;<a name="line.201"></a>
+<span class="sourceLineNo">202</span> }<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> * Returns the target for the minimum number of idle objects to maintain in<a name="line.205"></a>
+<span class="sourceLineNo">206</span> * the pool. This setting only has an effect if it is positive and<a name="line.206"></a>
+<span class="sourceLineNo">207</span> * {@link #getTimeBetweenEvictionRunsMillis()} is greater than zero. If this<a name="line.207"></a>
+<span class="sourceLineNo">208</span> * is the case, an attempt is made to ensure that the pool has the required<a name="line.208"></a>
+<span class="sourceLineNo">209</span> * minimum number of instances during idle object eviction runs.<a name="line.209"></a>
+<span class="sourceLineNo">210</span> * <p><a name="line.210"></a>
+<span class="sourceLineNo">211</span> * If the configured value of minIdle is greater than the configured value<a name="line.211"></a>
+<span class="sourceLineNo">212</span> * for maxIdle then the value of maxIdle will be used instead.<a name="line.212"></a>
+<span class="sourceLineNo">213</span> * </p><a name="line.213"></a>
+<span class="sourceLineNo">214</span> *<a name="line.214"></a>
+<span class="sourceLineNo">215</span> * @return The minimum number of objects.<a name="line.215"></a>
+<span class="sourceLineNo">216</span> *<a name="line.216"></a>
+<span class="sourceLineNo">217</span> * @see #setMinIdle(int)<a name="line.217"></a>
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+<span class="sourceLineNo">219</span> * @see #setTimeBetweenEvictionRunsMillis(long)<a name="line.219"></a>
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[... 1518 lines stripped ...]