Mercurial > hg > blitz_stable

annotate src/org/prevayler/implementation/NullPrevayler.java @ 27:511648fa4d64 Version 2.1

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Version to 2.1
author Dan Creswell <dan.creswell@gmail.com>
date Mon, 04 Jan 2010 13:00:40 +0000
parents 3dc0c5604566
children
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3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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1 package org.prevayler.implementation;
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2
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3 import java.io.IOException;
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4 import java.io.Serializable;
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5
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6 import org.prevayler.Command;
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7 import org.prevayler.PrevalentSystem;
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8
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9 /**
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10 Prevayler which logs nothing but dispatches all commands.
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11 */
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12 public class NullPrevayler implements SnapshotPrevayler {
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13
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14 private PrevalentSystem theSystem;
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16 private Snapshotter theNullSnapshotter = new NullSnapshotter();
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17
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18 public NullPrevayler(PrevalentSystem aSystem) {
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19 theSystem = aSystem;
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20 theSystem.clock(new SystemClock());
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21 }
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23 public PrevalentSystem system() {
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24 return theSystem;
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25 }
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26
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27 public Serializable executeCommand(Command command) throws Exception {
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28 return command.execute(theSystem);
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29 }
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31 public Serializable executeCommand(Command command, boolean sync)
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32 throws Exception {
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33 return command.execute(theSystem);
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34 }
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35
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36 public synchronized Snapshotter takeSnapshot() throws IOException {
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37 return theNullSnapshotter;
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38 }
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39
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40 private static class NullSnapshotter implements Snapshotter {
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41 NullSnapshotter() {
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42 }
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43
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44 public void save() throws IOException {
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45 // Do nothing
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46 }
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47 }
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48 }