Mercurial > hg > blitz_stable
comparison src/org/prevayler/implementation/SnapshotPrevayler.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 21 Mar 2009 11:00:06 +0000 |
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1 /* | |
2 The copyright of all source code included in this Prevayler distribution is | |
3 held by Klaus Wuestefeld, except the files that specifically state otherwise. | |
4 All rights are reserved. "PREVAYLER" is a trademark of Klaus Wuestefeld. | |
5 | |
6 | |
7 BSD License: | |
8 | |
9 Redistribution and use in source and binary forms, with or without | |
10 modification, are permitted provided that the following conditions are met: | |
11 | |
12 - Redistributions of source code must retain the above copyright notice, this | |
13 list of conditions and the following disclaimer. | |
14 | |
15 - Redistributions in binary form must reproduce the above copyright notice, | |
16 this list of conditions and the following disclaimer in the documentation | |
17 and/or other materials provided with the distribution. | |
18 | |
19 - Neither the name of Prevayler nor the names of its contributors may be used | |
20 to endorse or promote products derived from this software without specific | |
21 prior written permission. | |
22 | |
23 | |
24 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
34 POSSIBILITY OF SUCH DAMAGE. | |
35 */ | |
36 | |
37 package org.prevayler.implementation; | |
38 | |
39 import java.util.Date; | |
40 import java.io.*; | |
41 | |
42 import org.prevayler.*; | |
43 | |
44 /** Provides transparent persistence for business objects. | |
45 * This applies to any deterministic system implementing the PrevalentSystem interface. | |
46 * All commands to the system must be represented as objects implementing the Command interface and must be executed using Prevayler.executeCommand(Command). | |
47 * Take a look at the demo application included with the Prevayler distribution for examples. | |
48 * @see PrevaylerFactory | |
49 */ | |
50 public interface SnapshotPrevayler extends Prevayler { | |
51 /** | |
52 * This method prepares a snapshot of the system and returns it in a | |
53 * Snapshotter instance which can be used to save the snapshot to disk | |
54 * once dirty state has been sync'd to disk. If your application has no | |
55 * additional state, you can simply invoke on the Snapshotter immediately. | |
56 * @return Snapshotter to be used to save an appropriate snapshot post | |
57 * sync'ing of dirty state to disk. | |
58 * @see system() | |
59 * @throws IOException if there is trouble preparing the snapshot file. | |
60 */ | |
61 public Snapshotter takeSnapshot() throws IOException; | |
62 } | |
63 | |
64 |