Mercurial > hg > blitz_condensed
comparison src/org/prevayler/implementation/NullPrevayler.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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-1:000000000000 | 0:3dc0c5604566 |
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1 package org.prevayler.implementation; | |
2 | |
3 import java.io.IOException; | |
4 import java.io.Serializable; | |
5 | |
6 import org.prevayler.Command; | |
7 import org.prevayler.PrevalentSystem; | |
8 | |
9 /** | |
10 Prevayler which logs nothing but dispatches all commands. | |
11 */ | |
12 public class NullPrevayler implements SnapshotPrevayler { | |
13 | |
14 private PrevalentSystem theSystem; | |
15 | |
16 private Snapshotter theNullSnapshotter = new NullSnapshotter(); | |
17 | |
18 public NullPrevayler(PrevalentSystem aSystem) { | |
19 theSystem = aSystem; | |
20 theSystem.clock(new SystemClock()); | |
21 } | |
22 | |
23 public PrevalentSystem system() { | |
24 return theSystem; | |
25 } | |
26 | |
27 public Serializable executeCommand(Command command) throws Exception { | |
28 return command.execute(theSystem); | |
29 } | |
30 | |
31 public Serializable executeCommand(Command command, boolean sync) | |
32 throws Exception { | |
33 return command.execute(theSystem); | |
34 } | |
35 | |
36 public synchronized Snapshotter takeSnapshot() throws IOException { | |
37 return theNullSnapshotter; | |
38 } | |
39 | |
40 private static class NullSnapshotter implements Snapshotter { | |
41 NullSnapshotter() { | |
42 } | |
43 | |
44 public void save() throws IOException { | |
45 // Do nothing | |
46 } | |
47 } | |
48 } |