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comparison src/org/prevayler/Prevayler.java @ 0:3dc0c5604566

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Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
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-1:000000000000 0:3dc0c5604566
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;
38
39 import java.io.Serializable;
40
41
42 /**
43 Provides transparent persistence for all business objects in a
44 PrevalentSystem. All commands to the system must be represented as objects
45 implementing the Command interface and must be executed using
46 Prevayler.executeCommand(Command).
47 */
48 public interface Prevayler {
49
50 /**
51 * Returns the underlying PrevalentSystem.
52 */
53 public PrevalentSystem system();
54
55
56 /**
57 Logs the received command for crash or shutdown recovery and executes it
58 on the underlying PrevalentSystem.
59
60 @return The serializable object that was returned by the execution of command.
61 @throws IOException if there is trouble writing the command to one of the
62 log files.
63 @throws Exception if the execution of command throws an Exception.
64 */
65 public Serializable executeCommand(Command command) throws Exception;
66
67 /**
68 @param sync if <code>true</code>indicates that the log should be forced
69 after this command has been written otherwise the don't force.
70 */
71 public Serializable executeCommand(Command aCommand, boolean sync) throws Exception;
72 }