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annotate src/org/dancres/blitz/entry/InstanceSwitchListener.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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3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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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.Stat;
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4 import org.dancres.blitz.stats.SwitchListener;
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5 import org.dancres.blitz.stats.Switch;
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6 import org.dancres.blitz.stats.StatsBoard;
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7 import org.dancres.blitz.stats.InstanceSwitch;
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8 import org.dancres.blitz.stats.InstanceCount;
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9 import org.dancres.blitz.stats.SwitchSettings;
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11 class InstanceSwitchListener implements SwitchListener {
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12 private String theInstanceType;
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13 private InstanceCount theCount;
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15 InstanceSwitchListener(String aType, int anInitialCount) {
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16 theInstanceType = aType;
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17 theCount = new InstanceCount(aType, anInitialCount);
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18
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19 SwitchSettings.get().add(this);
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20 }
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21
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22 public synchronized void switchFlipped(Switch aSwitch) {
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23 if (aSwitch instanceof InstanceSwitch) {
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24 InstanceSwitch mySwitch = (InstanceSwitch) aSwitch;
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25
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26 if ((mySwitch.getType().equals(theInstanceType)) ||
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27 (mySwitch.isWildcard())) {
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28
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29 if (mySwitch.isOn()) {
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30 StatsBoard.get().add(theCount);
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31 } else
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32 StatsBoard.get().remove(theCount);
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33 }
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34 }
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35 }
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36
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37 synchronized void wrote() {
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38 theCount.wrote();
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39 }
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40
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41 synchronized void took() {
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42 theCount.took();
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43 }
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44
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45 Stat getInstanceStat() {
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46 return theCount.generate();
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47 }
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48
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49 synchronized int getTotal() {
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50 return theCount.getCount();
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51 }
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52
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53 void destroy() {
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54 SwitchSettings.get().remove(this);
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55 StatsBoard.get().remove(theCount);
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56 }
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57 }