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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.5.0_06) on Sun Apr 02 20:52:30 EDT 2006 --><META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><TITLE>StackObjectPool (Commons Pool 1.3 API)</TITLE><META NAME="keywords" CONTENT="org.apache.commons.pool.impl.StackObjectPool class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="StackObjectPool (Commons Pool 1.3 API)";}</SCRIPT><NOSCRIPT></NOSCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/StackObjectPool.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../../org/apache/commons/pool/impl/StackKeyedObjectPoolFactory.html" title="class in org.apache.commons.pool.impl"><B>PREV CLASS</B></A> <A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPoolFactory.html" title="class in org.apache.commons.pool.impl"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../../../index.html?org/apache/commons/pool/impl/StackObjectPool.html" target="_top"><B>FRAMES</B></A> <A HREF="StackObjectPool.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.apache.commons.pool.impl</FONT><BR>Class StackObjectPool</H2><PRE><A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A> <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><A HREF="../../../../../org/apache/commons/pool/BaseObjectPool.html" title="class in org.apache.commons.pool">org.apache.commons.pool.BaseObjectPool</A> <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.commons.pool.impl.StackObjectPool</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool">ObjectPool</A></DD></DL><HR><DL><DT><PRE>public class <B>StackObjectPool</B><DT>extends <A HREF="../../../../../org/apache/commons/pool/BaseObjectPool.html" title="class in org.apache.commons.pool">BaseObjectPool</A><DT>implements <A HREF="../../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool">ObjectPool</A></DL></PRE><P>A simple, <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Stack.html" title="class or interface in java.util"><CODE>Stack</CODE></A>-based <A HREF="../../../../../org/apache/commons/pool/ObjectPool.html" title="interface in org.apache.commons.pool"><CODE>ObjectPool</CODE></A> implementation. <p> Given a <A HREF="../../../../../org/apache/commons/pool/PoolableObjectFactory.html" title="interface in org.apache.commons.pool"><CODE>PoolableObjectFactory</CODE></A>, this class will maintain a simple pool of instances. A finite number of "sleeping" or idle instances is enforced, but when the pool is empty, new instances are created to support the new load. Hence this class places no limit on the number of "active" instances created by the pool, but is quite useful for re-using <tt>Object</tt>s without introducing artificial limits.<P><P><DL><DT><B>Version:</B></DT> <DD>$Revision: 383290 $ $Date: 2006-03-05 02:00:15 -0500 (Sun, 05 Mar 2006) $</DD></DL><HR><P><!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Field Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected <A HREF="../../../../../org/apache/commons/pool/PoolableObjectFactory.html" title="interface in org.apache.commons.pool">PoolableObjectFactory</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#_factory">_factory</A></B></CODE><BR> My <A HREF="../../../../../org/apache/commons/pool/PoolableObjectFactory.html" title="interface in org.apache.commons.pool"><CODE>PoolableObjectFactory</CODE></A>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#_maxSleeping">_maxSleeping</A></B></CODE><BR> The cap on the number of "sleeping" instances in the pool.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#_numActive">_numActive</A></B></CODE><BR> Number of object borrowed but not yet returned to the pool.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/util/Stack.html" title="class or interface in java.util">Stack</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#_pool">_pool</A></B></CODE><BR> My pool.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#DEFAULT_INIT_SLEEPING_CAPACITY">DEFAULT_INIT_SLEEPING_CAPACITY</A></B></CODE><BR> The default initial size of the pool (this specifies the size of the container, it does not cause the pool to be pre-populated.)</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected static int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#DEFAULT_MAX_SLEEPING">DEFAULT_MAX_SLEEPING</A></B></CODE><BR> The default cap on the number of "sleeping" instances in the pool.</TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#StackObjectPool()">StackObjectPool</A></B>()</CODE><BR> Create a new pool using no factory.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#StackObjectPool(int)">StackObjectPool</A></B>(int maxIdle)</CODE><BR> Create a new pool using no factory.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#StackObjectPool(int, int)">StackObjectPool</A></B>(int maxIdle, int initIdleCapacity)</CODE><BR> Create a new pool using no factory.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#StackObjectPool(org.apache.commons.pool.PoolableObjectFactory)">StackObjectPool</A></B>(<A HREF="../../../../../org/apache/commons/pool/PoolableObjectFactory.html" title="interface in org.apache.commons.pool">PoolableObjectFactory</A> factory)</CODE><BR> Create a new <tt>StackObjectPool</tt> using the specified <i>factory</i> to create new instances.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#StackObjectPool(org.apache.commons.pool.PoolableObjectFactory, int)">StackObjectPool</A></B>(<A HREF="../../../../../org/apache/commons/pool/PoolableObjectFactory.html" title="interface in org.apache.commons.pool">PoolableObjectFactory</A> factory, int maxIdle)</CODE><BR> Create a new <tt>SimpleObjectPool</tt> using the specified <i>factory</i> to create new instances, capping the number of "sleeping" instances to <i>max</i>.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#StackObjectPool(org.apache.commons.pool.PoolableObjectFactory, int, int)">StackObjectPool</A></B>(<A HREF="../../../../../org/apache/commons/pool/PoolableObjectFactory.html" title="interface in org.apache.commons.pool">PoolableObjectFactory</A> factory, int maxIdle, int initIdleCapacity)</CODE><BR> Create a new <tt>SimpleObjectPool</tt> using the specified <i>factory</i> to create new instances, capping the number of "sleeping" instances to <i>max</i>, and initially allocating a container capable of containing at least <i>init</i> instances.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Method Summary</B></FONT></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#addObject()">addObject</A></B>()</CODE><BR> Create an object, and place it into the pool.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../org/apache/commons/pool/impl/StackObjectPool.html#borrowObject()">borrowObject</A></B>()</CODE><BR> Obtain an instance from my pool.</TD>⌨️ 快捷键说明
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