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annotate src/org/dancres/blitz/stats/InstanceCount.java @ 0:3dc0c5604566

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Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
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3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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1 package org.dancres.blitz.stats;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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2
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Dan Creswell <dan.creswell@gmail.com>
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3 /**
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Dan Creswell <dan.creswell@gmail.com>
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4 <p>Tracks the number of instance of a particular type within a Blitz
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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5 instance. The instance count accounts for writes and takes but does not
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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6 account for lease expired entries because the cleanup of lease expired
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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7 entries is done lazily. Thus the instance counts should be treated as
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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8 a guide not an exact number.</p>
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Dan Creswell <dan.creswell@gmail.com>
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9 */
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10 public class InstanceCount implements Stat, StatGenerator {
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11 private long theId = StatGenerator.UNSET_ID;
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Dan Creswell <dan.creswell@gmail.com>
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12
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Dan Creswell <dan.creswell@gmail.com>
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13 private String theType;
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14 private int theCount;
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15
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Dan Creswell <dan.creswell@gmail.com>
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16 public InstanceCount(String aType, int aCount) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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17 theType = aType;
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18 theCount = aCount;
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Dan Creswell <dan.creswell@gmail.com>
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19 }
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20
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Dan Creswell <dan.creswell@gmail.com>
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21 private InstanceCount(long anId, String aType, int aCount) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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22 theId = anId;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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23 theType = aType;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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24 theCount = aCount;
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Dan Creswell <dan.creswell@gmail.com>
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25 }
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26
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27 public void setId(long anId) {
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28 theId = anId;
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29 }
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30
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31 public long getId() {
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32 return theId;
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33 }
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34
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Dan Creswell <dan.creswell@gmail.com>
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35 public synchronized Stat generate() {
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36 InstanceCount myStat = new InstanceCount(theId, theType, theCount);
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37 return myStat;
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Dan Creswell <dan.creswell@gmail.com>
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38 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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39
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40 public String getType() {
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41 return theType;
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42 }
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43
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44 public int getCount() {
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45 return theCount;
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Dan Creswell <dan.creswell@gmail.com>
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46 }
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47
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Dan Creswell <dan.creswell@gmail.com>
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48 public synchronized void wrote() {
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49 ++theCount;
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50 }
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51
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Dan Creswell <dan.creswell@gmail.com>
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52 public synchronized void took() {
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Dan Creswell <dan.creswell@gmail.com>
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53 --theCount;
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54 }
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55
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56 public String toString() {
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57 return "Total instance of type " + theType + " is " + theCount;
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58 }
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59 }