--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/dancres/blitz/stats/InstanceCount.java	Sat Mar 21 11:00:06 2009 +0000
@@ -0,0 +1,59 @@
+package org.dancres.blitz.stats;
+
+/**
+   <p>Tracks the number of instance of a particular type within a Blitz
+   instance.  The instance count accounts for writes and takes but does not
+   account for lease expired entries because the cleanup of lease expired
+   entries is done lazily.  Thus the instance counts should be treated as
+   a guide not an exact number.</p>
+ */
+public class InstanceCount implements Stat, StatGenerator {
+    private long theId = StatGenerator.UNSET_ID;
+
+    private String theType;
+    private int theCount;
+
+    public InstanceCount(String aType, int aCount) {
+        theType = aType;
+        theCount = aCount;
+    }
+
+    private InstanceCount(long anId, String aType, int aCount) {
+        theId = anId;
+        theType = aType;
+        theCount = aCount;
+    }
+
+    public void setId(long anId) {
+        theId = anId;
+    }
+
+    public long getId() {
+        return theId;
+    }
+
+    public synchronized Stat generate() {
+        InstanceCount myStat = new InstanceCount(theId, theType, theCount);
+        return myStat;
+    }
+
+    public String getType() {
+        return theType;
+    }
+
+    public int getCount() {
+        return theCount;
+    }
+
+    public synchronized void wrote() {
+        ++theCount;
+    }
+
+    public synchronized void took() {
+        --theCount;
+    }
+
+    public String toString() {
+        return "Total instance of type " + theType + " is " + theCount;
+    }
+}