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<div class="subTitle">org.apache.commons.pool</div>
<h2 title="Class BaseObjectPool" class="title">Class BaseObjectPool<T></h2>
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<li>org.apache.commons.pool.BaseObjectPool<T></li>
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<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>T</code> - the type of objects held in this pool</dd>
</dl>
<dl>
<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool">ObjectPool</a><T></dd>
</dl>
<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../org/apache/commons/pool/impl/GenericObjectPool.html" title="class in org.apache.commons.pool.impl">GenericObjectPool</a>, <a href="../../../../org/apache/commons/pool/impl/SoftReferenceObjectPool.html" title="class in org.apache.commons.pool.impl">SoftReferenceObjectPool</a>, <a href="../../../../org/apache/commons/pool/impl/StackObjectPool.html" title="class in org.apache.commons.pool.impl">StackObjectPool</a></dd>
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<pre>public abstract class <span class="typeNameLabel">BaseObjectPool<T></span>
extends <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements <a href="../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool">ObjectPool</a><T></pre>
<div class="block">A simple base implementation of <a href="../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool"><code>ObjectPool</code></a>.
Optional operations are implemented to either do nothing, return a value
indicating it is unsupported or throw <a href="/usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang"><code>UnsupportedOperationException</code></a>.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>Pool 1.0</dd>
<dt><span class="simpleTagLabel">Version:</span></dt>
<dd>$Revision: 1222396 $ $Date: 2011-12-22 14:02:25 -0500 (Thu, 22 Dec 2011) $</dd>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Rodney Waldhoff, Sandy McArthur</dd>
</dl>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/pool/BaseObjectPool.html#BaseObjectPool--">BaseObjectPool</a></span>()</code> </td>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/pool/BaseObjectPool.html#addObject--">addObject</a></span>()</code>
<div class="block">Not supported in this base implementation.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>abstract <a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/pool/BaseObjectPool.html#borrowObject--">borrowObject</a></span>()</code>
<div class="block">Obtains an instance from the pool.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/pool/BaseObjectPool.html#clear--">clear</a></span>()</code>
<div class="block">Not supported in this base implementation.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/pool/BaseObjectPool.html#close--">close</a></span>()</code>
<div class="block">Close this pool.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/pool/BaseObjectPool.html#getNumActive--">getNumActive</a></span>()</code>
<div class="block">Not supported in this base implementation.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/pool/BaseObjectPool.html#getNumIdle--">getNumIdle</a></span>()</code>
<div class="block">Not supported in this base implementation.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/pool/BaseObjectPool.html#invalidateObject-T-">invalidateObject</a></span>(<a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a> obj)</code>
<div class="block">Invalidates an object from the pool.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/pool/BaseObjectPool.html#isClosed--">isClosed</a></span>()</code>
<div class="block">Has this pool instance been closed.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/commons/pool/BaseObjectPool.html#returnObject-T-">returnObject</a></span>(<a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a> obj)</code>
<div class="block">Returns an instance to the pool.</div>
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<h3>Methods inherited from class java.lang.<a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h4>BaseObjectPool</h4>
<pre>public BaseObjectPool()</pre>
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<h4>addObject</h4>
<pre>public void addObject()
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a>,
<a href="/usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</a></pre>
<div class="block">Not supported in this base implementation.
Always throws an <a href="/usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang"><code>UnsupportedOperationException</code></a>,
subclasses should override this behavior.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/commons/pool/ObjectPool.html#addObject--">addObject</a></code> in interface <code><a href="../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool">ObjectPool</a><<a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a>></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</a></code></dd>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code> - when <a href="../../../../org/apache/commons/pool/PoolableObjectFactory.html#makeObject--"><code>PoolableObjectFactory.makeObject()</code></a> fails.</dd>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</a></code> - after <a href="../../../../org/apache/commons/pool/ObjectPool.html#close--"><code>ObjectPool.close()</code></a> has been called on this pool.</dd>
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</ul>
<a name="borrowObject--">
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<h4>borrowObject</h4>
<pre>public abstract <a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a> borrowObject()
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Obtains an instance from the pool.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/commons/pool/ObjectPool.html#borrowObject--">borrowObject</a></code> in interface <code><a href="../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool">ObjectPool</a><<a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a>></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>an instance from the pool</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code> - if an instance cannot be obtained from the pool</dd>
</dl>
</li>
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<a name="clear--">
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<h4>clear</h4>
<pre>public void clear()
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a>,
<a href="/usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</a></pre>
<div class="block">Not supported in this base implementation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/commons/pool/ObjectPool.html#clear--">clear</a></code> in interface <code><a href="../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool">ObjectPool</a><<a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a>></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</a></code></dd>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
</dl>
</li>
</ul>
<a name="close--">
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<h4>close</h4>
<pre>public void close()
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Close this pool.
This affects the behavior of <code>isClosed</code> and <code>assertOpen</code>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/commons/pool/ObjectPool.html#close--">close</a></code> in interface <code><a href="../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool">ObjectPool</a><<a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a>></code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code> - <strong>deprecated</strong>: implementations should silently fail if not all resources can be freed.</dd>
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<a name="getNumActive--">
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<h4>getNumActive</h4>
<pre>public int getNumActive()
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</a></pre>
<div class="block">Not supported in this base implementation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/commons/pool/ObjectPool.html#getNumActive--">getNumActive</a></code> in interface <code><a href="../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool">ObjectPool</a><<a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a>></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a negative value.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</a></code></dd>
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<h4>getNumIdle</h4>
<pre>public int getNumIdle()
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</a></pre>
<div class="block">Not supported in this base implementation.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/commons/pool/ObjectPool.html#getNumIdle--">getNumIdle</a></code> in interface <code><a href="../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool">ObjectPool</a><<a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a>></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>a negative value.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/UnsupportedOperationException.html?is-external=true" title="class or interface in java.lang">UnsupportedOperationException</a></code></dd>
</dl>
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<h4>invalidateObject</h4>
<pre>public abstract void invalidateObject(<a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a> obj)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block"><p>Invalidates an object from the pool.</p>
<p>By contract, <code>obj</code> <strong>must</strong> have been obtained
using <a href="../../../../org/apache/commons/pool/BaseObjectPool.html#borrowObject--"><code>borrowObject</code></a>.<p>
<p>This method should be used when an object that has been borrowed
is determined (due to an exception or other problem) to be invalid.</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/commons/pool/ObjectPool.html#invalidateObject-T-">invalidateObject</a></code> in interface <code><a href="../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool">ObjectPool</a><<a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a>></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>obj</code> - a <a href="../../../../org/apache/commons/pool/BaseObjectPool.html#borrowObject--"><code>borrowed</code></a> instance to be disposed.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<h4>isClosed</h4>
<pre>public final boolean isClosed()</pre>
<div class="block">Has this pool instance been closed.</div>
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<dd><code>true</code> when this pool has been closed.</dd>
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<h4>returnObject</h4>
<pre>public abstract void returnObject(<a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a> obj)
throws <a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Returns an instance to the pool.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/commons/pool/ObjectPool.html#returnObject-T-">returnObject</a></code> in interface <code><a href="../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool">ObjectPool</a><<a href="../../../../org/apache/commons/pool/BaseObjectPool.html" title="type parameter in BaseObjectPool">T</a>></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>obj</code> - instance to return to the pool</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="/usr/share/doc/default-jdk-doc/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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