KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > mckoi > database > TransactionModificationListener


1 /**
2  * com.mckoi.database.TransactionModificationListener 07 Mar 2003
3  *
4  * Mckoi SQL Database ( http://www.mckoi.com/database )
5  * Copyright (C) 2000, 2001, 2002 Diehl and Associates, Inc.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * Version 2 as published by the Free Software Foundation.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License Version 2 for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * Version 2 along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19  *
20  * Change Log:
21  *
22  *
23  */
24
25 package com.mckoi.database;
26
27 /**
28  * A listener that is notified of table modification events made by a
29  * transaction, both immediately inside a transaction and when a transaction
30  * commits. These events can occur either immediately before or immediately
31  * after the data is modified or during a commit.
32  *
33  * @author Tobias Downer
34  */
35
36 public interface TransactionModificationListener {
37
38   /**
39    * An action for when changes to a table are committed. This event occurs
40    * after constraint checks, and before the change is actually committed to
41    * the database. If this method generates an exception then the change
42    * is rolled back and any changes made by the transaction are lost. This
43    * action is generated inside a 'commit lock' of the conglomerate, and
44    * therefore care should be taken with the performance of this method.
45    * <p>
46    * The event object provides access to a SimpleTransaction object that is a
47    * read-only view of the database in its committed state (if this operation
48    * is successful). The transaction can be used to perform any last minute
49    * deferred constraint checks.
50    * <p>
51    * This action is useful for last minute abortion of a transaction, or for
52    * updating cache information. It can not be used as a triggering mechanism
53    * and should never call back to user code.
54    */
55   void tableCommitChange(TableCommitModificationEvent event);
56
57 }
58
59
Popular Tags