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Java > Open Source Codes > org > tigris > scarab > pipeline > ResetCacheValve


1 package org.tigris.scarab.pipeline;
2
3 /* ================================================================
4  * Copyright (c) 2001 Collab.Net. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions are
8  * met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in the
15  * documentation and/or other materials provided with the distribution.
16  *
17  * 3. The end-user documentation included with the redistribution, if
18  * any, must include the following acknowlegement: "This product includes
19  * software developed by Collab.Net <http://www.Collab.Net/>."
20  * Alternately, this acknowlegement may appear in the software itself, if
21  * and wherever such third-party acknowlegements normally appear.
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23  * 4. The hosted project names must not be used to endorse or promote
24  * products derived from this software without prior written
25  * permission. For written permission, please contact info@collab.net.
26  *
27  * 5. Products derived from this software may not use the "Tigris" or
28  * "Scarab" names nor may "Tigris" or "Scarab" appear in their names without
29  * prior written permission of Collab.Net.
30  *
31  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
32  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
33  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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43  * ====================================================================
44  *
45  * This software consists of voluntary contributions made by many
46  * individuals on behalf of Collab.Net.
47  */
48
49 import java.io.IOException JavaDoc;
50 import org.apache.turbine.RunData;
51 import org.apache.turbine.TurbineException;
52 import org.apache.turbine.pipeline.AbstractValve;
53 import org.apache.turbine.ValveContext;
54
55 import org.tigris.scarab.services.cache.ScarabCache;
56
57 /**
58  * This valve resets the cache that is used by business objects to avoid
59  * multiple, duplicate db queries.
60  *
61  * @author <a HREF="mailto:jmcnally@collab.net">John McNally</a>
62  * @version $Id: ResetCacheValve.java 7365 2003-03-15 21:56:59Z jon $
63  */
64 public final class ResetCacheValve
65     extends AbstractValve
66 {
67     /**
68      * @see org.apache.turbine.Valve#invoke(RunData, ValveContext)
69      */
70     public final void invoke(RunData data, ValveContext context)
71         throws IOException JavaDoc, TurbineException
72     {
73         // clear the short-term cache
74 ScarabCache.clear();
75
76         // Pass control to the next Valve in the Pipeline
77 context.invokeNext(data);
78     }
79 }
80
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