Mercurial > hg > blitz_condensed
annotate src/org/dancres/blitz/txn/PersistentPersonality.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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children | 4580bb12db30 |
rev | line source |
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0
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Initial checkin of blitz 2.0 fcs - no installer yet.
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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.SnapshotPrevaylerImpl; |
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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.Persistent; |
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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 import org.dancres.blitz.txn.batch.*; |
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15 |
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16 /** |
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17 Understands how to translate Persistent into core component configuration. |
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18 |
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19 @see org.dancres.blitz.config.Persistent |
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20 */ |
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21 class PersistentPersonality implements StoragePersonality { |
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22 private Persistent theModel; |
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23 private String theLogDir; |
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24 |
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25 PersistentPersonality(Persistent aModel, String aLogDir) { |
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26 theModel = aModel; |
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27 theLogDir = aLogDir; |
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28 |
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29 TxnManager.theLogger.log(Level.INFO, "PersistentPersonality"); |
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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 TxnManager.theLogger.log(Level.INFO, "Write barrier window: " + |
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35 theModel.getBatchWriteWindowSize()); |
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36 |
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37 if (theModel.useConcurrentWriteBatcher()) |
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38 TxnManager.theLogger.log(Level.INFO, |
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39 "*** Using concurrent batcher ***"); |
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40 |
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41 if (theModel.shouldCleanLogs()) { |
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42 TxnManager.theLogger.log(Level.WARNING, |
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43 "*** Automatically cleaning logs *** [EXPERIMENTAL]"); |
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44 } |
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45 |
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46 Disk.init(); |
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47 } |
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48 |
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49 public CheckpointTrigger getCheckpointTrigger(Checkpointer aCheckpointer) { |
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50 return |
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51 new OpCountingCheckpointTrigger(aCheckpointer, |
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52 theModel.getMaxLogsBeforeSync()); |
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53 } |
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54 |
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55 public SnapshotPrevayler getPrevayler(PrevalentSystem aSystem) |
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56 throws Exception { |
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57 |
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58 PersistentReboot myReboot = new PersistentReboot(theModel); |
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59 myReboot.execute(); |
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60 |
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61 SnapshotPrevayler myPrevayler = |
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62 new SnapshotPrevaylerImpl(aSystem, |
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63 theLogDir, |
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64 theModel.shouldResetLogStream(), |
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65 theModel.shouldCleanLogs(), |
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66 theModel.getLogBufferSize()); |
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67 |
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68 if (theModel.getBatchWriteWindowSize() != 0) { |
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69 int myWindowSize = theModel.getBatchWriteWindowSize(); |
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70 |
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71 if (theModel.useConcurrentWriteBatcher()) { |
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72 myPrevayler = |
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73 new ConcurrentWriteBatcher(myPrevayler, myWindowSize); |
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74 } else { |
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75 myPrevayler = |
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76 new WriteBatcher(myPrevayler, myWindowSize); |
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77 } |
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78 } |
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79 |
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80 return myPrevayler; |
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81 } |
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82 |
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83 public void destroy() { |
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84 Disk.destroy(); |
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85 Disk.clean(theLogDir); |
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86 } |
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87 } |