01: /*
02: * Copyright (c) 1998-2001 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: * Free SoftwareFoundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Scott Ferguson
27: *
28: * $Id: HttpSessionBindingListener.java,v 1.2 2004/09/29 00:12:47 cvs Exp $
29: */
30:
31: package javax.servlet.http;
32:
33: import java.util.EventListener;
34:
35: /**
36: * This listener lets session values know when they've been added to
37: * or removed from a session. This particularly useful when a session
38: * value needs to free resources at the session end.
39: */
40: public interface HttpSessionBindingListener extends EventListener {
41: /**
42: * Called when the object is added to a session.
43: *
44: * @param event session event object
45: */
46: public void valueBound(HttpSessionBindingEvent event);
47:
48: /**
49: * Called when the object is removed from a session or the session
50: * is invalidated.
51: *
52: * @param event session event object
53: */
54: public void valueUnbound(HttpSessionBindingEvent event);
55: }
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