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annotate src/org/dancres/blitz/txn/TimeBarrierPersonality.java @ 17:4580bb12db30

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Separate command execution from command logging.
author Dan Creswell <dan.creswell@gmail.com>
date Sun, 05 Jul 2009 16:26:25 +0100
parents 3dc0c5604566
children
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1 package org.dancres.blitz.txn;
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2
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3 import java.util.logging.Level;
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4
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5 import org.prevayler.implementation.SnapshotPrevayler;
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6 import org.prevayler.implementation.BufferingPrevaylerImpl;
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7
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8 import org.prevayler.PrevalentSystem;
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10 import org.dancres.blitz.config.TimeBarrierPersistent;
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11
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12 import org.dancres.blitz.disk.Disk;
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13
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14 /**
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15 Understands how to translate TimeBarrierPersistent into core component
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16 configuration.
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17
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18 @see org.dancres.blitz.config.TimeBarrierPersistent
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19 */
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20 class TimeBarrierPersonality implements StoragePersonality {
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21 private TimeBarrierPersistent theModel;
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22 private String theLogDir;
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23
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24 TimeBarrierPersonality(TimeBarrierPersistent aModel, String aLogDir) {
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25 theModel = aModel;
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26 theLogDir = aLogDir;
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27
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28 TxnManager.theLogger.log(Level.INFO, "TimeBarrierPersonality");
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29
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30 TxnManager.theLogger.log(Level.INFO, "Max logs before sync: " +
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31 theModel.getMaxLogsBeforeSync());
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32 TxnManager.theLogger.log(Level.INFO, "Reset log stream: " +
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33 theModel.shouldResetLogStream());
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34
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35 if (theModel.shouldCleanLogs()) {
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36 TxnManager.theLogger.log(Level.WARNING,
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37 "*** Automatically cleaning logs *** [EXPERIMENTAL]");
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38 }
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39
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40 Disk.init();
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41 }
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42
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43 public CheckpointTrigger getCheckpointTrigger(Checkpointer aCheckpointer) {
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44 /*
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45 return
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46 new OpCountingCheckpointTrigger(aCheckpointer,
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47 theModel.getMaxLogsBeforeSync());
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48 */
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49 return
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50 new TimeoutCheckpointTrigger(aCheckpointer,
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51 theModel.getMaxLogsBeforeSync(), theModel.getFlushTime());
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52 }
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53
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54 public SnapshotPrevayler getPrevayler(PrevalentSystem aSystem)
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55 throws Exception {
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56
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57 PersistentReboot myReboot = new PersistentReboot(theModel);
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58 myReboot.execute();
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59
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60 SnapshotPrevayler myPrevayler =
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61 new BufferingPrevaylerImpl(aSystem, theLogDir,
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62 theModel.shouldResetLogStream(),
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63 theModel.shouldCleanLogs(),
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64 theModel.getLogBufferSize());
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65
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66 return myPrevayler;
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67 }
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68
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69 public void destroy() {
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70 Disk.destroy();
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71 Disk.clean(theLogDir);
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72 }
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73 }