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Java > Open Source Codes > com > mckoi > database > jdbc > DatabaseCallBack


1 /**
2  * com.mckoi.database.jdbc.DatabaseCallBack 02 Oct 2000
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.jdbc;
26
27 /**
28  * An interface that is input to the DatabaseInterface as a way to be
29  * notified of event information from inside the database.
30  *
31  * @author Tobias Downer
32  */
33
34 public interface DatabaseCallBack {
35
36   /**
37    * Called when the database has generated an event that this user is
38    * listening for.
39    * <p>
40    * NOTE: The thread that calls back these events is always a volatile
41    * thread that may not block. It is especially important that no queries
42    * are executed when this calls back. To safely act on events, it is
43    * advisable to dispatch onto another thread such as the
44    * SwingEventDispatcher thread.
45    */
46   void databaseEvent(int event_type, String JavaDoc event_message);
47
48 }
49
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