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Java > Open Source Codes > org > objectweb > cjdbc > controller > virtualdatabase > protocol > CacheInvalidate


1 /**
2  * C-JDBC: Clustered JDBC.
3  * Copyright (C) 2002-2005 French National Institute For Research In Computer
4  * Science And Control (INRIA).
5  * Contact: c-jdbc@objectweb.org
6  *
7  * This library is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU Lesser General Public License as published by the
9  * Free Software Foundation; either version 2.1 of the License, or any later
10  * version.
11  *
12  * This library is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
15  * for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public License
18  * along with this library; if not, write to the Free Software Foundation,
19  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
20  *
21  * Initial developer(s): Emmanuel Cecchet.
22  * Contributor(s): ______________________.
23  */
24
25 package org.objectweb.cjdbc.controller.virtualdatabase.protocol;
26
27 import java.sql.SQLException JavaDoc;
28
29 import org.objectweb.cjdbc.common.sql.AbstractWriteRequest;
30 import org.objectweb.cjdbc.controller.requestmanager.distributed.DistributedRequestManager;
31
32 /**
33  * This class defines a CacheInvalidate
34  *
35  * @author <a HREF="mailto:Emmanuel.Cecchet@inria.fr">Emmanuel Cecchet </a>
36  * @version 1.0
37  */
38 public class CacheInvalidate extends DistributedRequest
39 {
40   private static final long serialVersionUID = -3330942475224539877L;
41
42   /**
43    * Creates a new <code>CacheInvalidate</code> object
44    *
45    * @param request Write request that invalidates the cache
46    */
47   public CacheInvalidate(AbstractWriteRequest request)
48   {
49     super(request);
50   }
51
52   /**
53    * @see org.objectweb.cjdbc.controller.virtualdatabase.protocol.DistributedRequest#scheduleRequest(org.objectweb.cjdbc.controller.requestmanager.distributed.DistributedRequestManager)
54    */
55   public final void scheduleRequest(DistributedRequestManager drm)
56       throws SQLException JavaDoc
57   {
58   }
59
60   /**
61    * @see org.objectweb.cjdbc.controller.virtualdatabase.protocol.DistributedRequest#executeScheduledRequest(org.objectweb.cjdbc.controller.requestmanager.distributed.DistributedRequestManager)
62    */
63   public final Object JavaDoc executeScheduledRequest(DistributedRequestManager drm)
64       throws SQLException JavaDoc
65   {
66     // Notify cache if any
67 if (drm.getResultCache() != null)
68     { // Update cache
69 drm.getResultCache().writeNotify((AbstractWriteRequest) request);
70     }
71     return null;
72   }
73
74 }
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