Mercurial > hg > blitz_stable
annotate src/org/dancres/blitz/txn/TimeBarrierPersonality.java @ 32:243c74d599bf
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author | Dan Creswell <dan.creswell@gmail.com> |
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date | Sat, 12 Jun 2010 10:41:47 +0100 |
parents | 4580bb12db30 |
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rev | line source |
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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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9 |
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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 } |