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annotate src/org/dancres/blitz/entry/OpSwitchListener.java @ 35:6f68e94c1fb8 default tip

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Add CondensedStats monitoring utility, equivalent to vmstat
author Dominic Cleal <dominic-cleal@cdo2.com>
date Thu, 05 Aug 2010 11:07:25 +0100
parents 3dc0c5604566
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0
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1 package org.dancres.blitz.entry;
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2
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3 import org.dancres.blitz.stats.SwitchListener;
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4 import org.dancres.blitz.stats.Switch;
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5 import org.dancres.blitz.stats.OpSwitch;
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6 import org.dancres.blitz.stats.OpStat;
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7 import org.dancres.blitz.stats.StatsBoard;
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8 import org.dancres.blitz.stats.SwitchSettings;
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9
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10 /**
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11 Listens for changes in OpSwitches pertinent to a particular Entry type
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12 and manages counts and statistics accordingly.
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13 */
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14 class OpSwitchListener implements SwitchListener {
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15 private boolean trackTakes;
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16 private boolean trackReads;
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17 private boolean trackWrites;
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18
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19 private String theType;
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20
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21 private OpStat theTakes;
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22 private OpStat theReads;
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23 private OpStat theWrites;
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24
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25 OpSwitchListener(String aType) {
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26 theType = aType;
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27 theTakes = new OpStat(theType, OpStat.TAKES);
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28 theReads = new OpStat(theType, OpStat.READS);
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29 theWrites = new OpStat(theType, OpStat.WRITES);
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30
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31 SwitchSettings.get().add(this);
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32 }
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33
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34 public synchronized void switchFlipped(Switch aSwitch) {
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35 if (aSwitch instanceof OpSwitch) {
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36 OpSwitch mySwitch = (OpSwitch) aSwitch;
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37
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38 if ((mySwitch.getType().equals(theType)) ||
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39 (mySwitch.isWildcard())) {
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40
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41 boolean mySetting = mySwitch.isEnabled();
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42
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43 switch (mySwitch.getOp()) {
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44 case OpSwitch.TAKE_OPS : {
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45 trackTakes = mySetting;
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46
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47 if (mySetting)
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48 StatsBoard.get().add(theTakes);
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49 else
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50 StatsBoard.get().remove(theTakes);
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51
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52 break;
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53 }
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54 case OpSwitch.READ_OPS : {
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55 trackReads = mySetting;
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56
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57 if (mySetting)
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58 StatsBoard.get().add(theReads);
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59 else
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60 StatsBoard.get().remove(theReads);
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61
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62 break;
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63 }
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64 case OpSwitch.WRITE_OPS : {
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65 trackWrites = mySetting;
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66
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67 if (mySetting)
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68 StatsBoard.get().add(theWrites);
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69 else
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70 StatsBoard.get().remove(theWrites);
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71
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72 break;
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73 }
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74 }
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75 }
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76 }
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77 }
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78
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79 synchronized void didWrite() {
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80 if (trackWrites)
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81 theWrites.incCount();
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82 }
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83
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84 synchronized void didRead() {
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85 if (trackReads)
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86 theReads.incCount();
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87 }
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88
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89 synchronized void didTake() {
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90 if (trackTakes)
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91 theTakes.incCount();
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92 }
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93
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94 void destroy() {
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95 SwitchSettings.get().remove(this);
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96 StatsBoard.get().remove(theReads);
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97 StatsBoard.get().remove(theTakes);
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98 StatsBoard.get().remove(theWrites);
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99 }
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100 }