1 /* Reattore HTTP Server
2
3 Copyright (C) 2002 Michael Hope <michaelh@juju.net.nz>
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 $Id: CachableSource.java,v 1.2 2003/02/17 06:09:54 michaelh Exp $
20 */
21
22 package juju.reattore.io;
23
24 /*** A source that can be cached and that manages it's expiration and
25 re-use.
26 */
27 public interface CachableSource {
28
29 /*** Called before the source is used, and may be used to mark this
30 source as expired and in need of re-generation. May not
31 always be called before re-use.
32
33 @return true If this source is expired and should be
34 re-loaded.
35 */
36 boolean isExpired();
37
38 /*** Releases this source from the cache. Used to release any
39 resources.
40 */
41 void release();
42
43 /*** Resets this source into the original state. Called before
44 placing back into the cache.
45 */
46 void rewind();
47
48 /*** Binds this source to a cache. The source must call
49 Cache.onClose() when closed and allow the cache to cancel the
50 close.
51
52 @param ch The cache to bind to.
53 */
54 void setCacheCallback(Cache ch);
55 }
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