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1
4 package com.tc.objectserver.impl;
5
6 import com.tc.objectserver.api.ObjectInstanceMonitor;
7 import com.tc.objectserver.api.ObjectInstanceMonitorMBean;
8
9 import gnu.trove.TObjectIntHashMap;
10 import gnu.trove.TObjectIntProcedure;
11
12 import java.util.HashMap  ;
13 import java.util.Map ;
14
15 public class ObjectInstanceMonitorImpl implements ObjectInstanceMonitor, ObjectInstanceMonitorMBean {
16
17 private final TObjectIntHashMap instanceCounts = new TObjectIntHashMap();
18
19 public ObjectInstanceMonitorImpl() {
20 }
22
23 public synchronized void instanceCreated(String type) {
24 if (type == null) { throw new IllegalArgumentException (); }
25
26 if (!instanceCounts.increment(type)) {
27 instanceCounts.put(type, 1);
28 }
29 }
30
31 public synchronized void instanceDestroyed(String type) {
32 if (type == null) { throw new IllegalArgumentException (); }
33
34 if (!instanceCounts.adjustValue(type, -1)) { throw new IllegalStateException ("No count available for type " + type); }
35
36 if (instanceCounts.get(type) <= 0) {
37 instanceCounts.remove(type);
38 }
39 }
40
41 public synchronized Map getInstanceCounts() {
42 final Map rv = new HashMap();
43
44 instanceCounts.forEachEntry(new TObjectIntProcedure() {
45 public boolean execute(Object key, int value) {
46 rv.put(key, new Integer (value));
47 return true;
48 }
49 });
50
51 return rv;
52 }
53 }
54 |
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