01: /*
02: * Copyright (c) 1998-2008 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:
29: package com.caucho.server.cache;
30:
31: import java.io.*;
32:
33: /**
34: * Cached response.
35: */
36: abstract public class AbstractCacheEntry {
37: /**
38: * If the response discovers that the page hasn't changed,
39: * update the cache time.
40: */
41: abstract public void updateExpiresDate();
42:
43: /**
44: * Opens an output stream for byte entries.
45: */
46: abstract public OutputStream openOutputStream();
47:
48: /**
49: * Opens a writer for char entries.
50: */
51: abstract public Writer openWriter();
52:
53: /**
54: * Destroys the entry.
55: */
56: abstract public void destroy();
57: }
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