Mercurial > hg > blitz_condensed
annotate src/org/dancres/blitz/txn/PersistentPersonality.java @ 34:6f68e94c1fb8 default tip
Add CondensedStats monitoring utility, equivalent to vmstat
author | Dominic Cleal <dominic-cleal@cdo2.com> |
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date | Thu, 05 Aug 2010 11:07:25 +0100 |
parents | a77f0a9ed93c |
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0
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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.PrevaylerCore; |
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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.getBatchWriteWindowSizeMs() + ", " + theModel.getBatchWriteWindowSizeNs()); |
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36 |
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37 if (!theModel.dontUseExperimentalBatcher()) |
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38 TxnManager.theLogger.log(Level.INFO, |
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39 "*** Experimental batcher enabled ***"); |
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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 PrevaylerCore myPrevayler = |
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62 new PrevaylerCore(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.getBatchWriteWindowSizeMs() != 0) || |
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69 (theModel.getBatchWriteWindowSizeNs() != 0)) { |
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70 long myWindowSizeMs = theModel.getBatchWriteWindowSizeMs(); |
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71 int myWindowSizeNs = theModel.getBatchWriteWindowSizeNs(); |
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72 |
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73 if (theModel.dontUseExperimentalBatcher()) { |
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74 return new ConcurrentWriteBatcher(myPrevayler, myWindowSizeMs, myWindowSizeNs); |
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75 } else { |
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76 return new OptimisticBatcher(myPrevayler); |
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77 } |
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78 } else |
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79 return new NullBatcher(myPrevayler); |
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80 } |
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81 |
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82 public void destroy() { |
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83 Disk.destroy(); |
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84 Disk.clean(theLogDir); |
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85 } |
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86 } |