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Java > Open Source Codes > org > apache > avalon > excalibur > pool > Poolable


1 /*
2
3  ============================================================================
4                    The Apache Software License, Version 1.1
5  ============================================================================
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7  Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
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9  Redistribution and use in source and binary forms, with or without modifica-
10  tion, are permitted provided that the following conditions are met:
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13     this list of conditions and the following disclaimer.
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21     developed by the Apache Software Foundation (http://www.apache.org/)."
22     Alternately, this acknowledgment may appear in the software itself, if
23     and wherever such third-party acknowledgments normally appear.
24  
25  4. The names "Jakarta", "Avalon", "Excalibur" and "Apache Software Foundation"
26     must not be used to endorse or promote products derived from this software
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30  5. Products derived from this software may not be called "Apache", nor may
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45  This software consists of voluntary contributions made by many individuals
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49 */
50 package org.apache.avalon.excalibur.pool;
51
52 /**
53  * <code>Poolable</code> is a marker interface for Components that can
54  * be pooled. Components that are not pooled are created anew via a
55  * factory every time a request is made for the component.
56  * <p>
57  * Components implementing this interface can add the following
58  * attributes to its definition:
59  * <pre><code>
60  * &lt;component pool-min="1" pool-max="10" pool-grow="1"&gt;
61  * &lt;tag&gt;value&lt;/tag&gt;
62  * &lt;/component&gt;
63  * </pre></code>
64  * Where:
65  * <table border="0" cellpadding="4" cellspacing="0">
66  * <tr>
67  * <td valign="top"><code>pool-min</code></td>
68  * <td valign="top">sets the minimum number of Components maintained by the
69  * pool</td>
70  * </tr>
71  * <tr>
72  * <td valign="top"><code>pool-max</code></td>
73  * <td valign="top">sets the maximum number of Components maintained by the
74  * pool</td>
75  * </tr>
76  * <tr>
77  * <td valign="top"><code>pool-grow</code></td>
78  * <td valign="top">sets the number of Components to grow or
79  * shrink the pool by whenever it becomes necessary to do so</td>
80  * </tr>
81  * </table>
82  * </p><p>
83  * NB: It was a deliberate choice not to extend Component. This will have to
84  * be reassed once we see it in action.
85  * </p>
86  *
87  * @author <a HREF="mailto:peter@apache.org">Peter Donald</a>
88  * @version CVS $Revision: 1.2 $ $Date: 2003/02/20 17:09:24 $
89  * @since 4.0
90  */
91 public interface Poolable
92 {
93 }
94
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