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1
8 package examples.caching;
9
10 import java.util.HashMap  ;
11 import java.util.Collections ;
12 import java.util.Map ;
13
14
17 public class CacheStatistics {
18
19 private static Map s_methodInvocations = Collections.synchronizedMap(new HashMap ());
20
21 private static Map s_cacheInvocations = Collections.synchronizedMap(new HashMap ());
22
23 public static void addMethodInvocation(final String methodName, final Class [] parameterTypes) {
24 Long hash = calculateHash(methodName, parameterTypes);
25 if (!s_methodInvocations.containsKey(hash)) {
26 s_methodInvocations.put(hash, new Integer (0));
27 }
28 int counter = ((Integer ) s_methodInvocations.get(hash)).intValue();
29 counter++;
30 s_methodInvocations.put(hash, new Integer (counter));
31 }
32
33 public static void addCacheInvocation(final String methodName, final Class [] parameterTypes) {
34 Long hash = calculateHash(methodName, parameterTypes);
35 if (!s_cacheInvocations.containsKey(hash)) {
36 s_cacheInvocations.put(hash, new Integer (0));
37 }
38 int counter = ((Integer ) s_cacheInvocations.get(hash)).intValue();
39 counter++;
40 s_cacheInvocations.put(hash, new Integer (counter));
41 }
42
43 public static int getNrOfMethodInvocationsFor(final String methodName,
44 final Class [] parameterTypes) {
45 Integer number = (Integer ) s_methodInvocations
46 .get(calculateHash(methodName, parameterTypes));
47 if (number != null) {
48 return number.intValue();
49 } else {
50 return 0;
51 }
52 }
53
54 public static int getNrOfCacheInvocationsFor(final String methodName,
55 final Class [] parameterTypes) {
56 Integer number = (Integer ) s_cacheInvocations
57 .get(calculateHash(methodName, parameterTypes));
58 if (number != null) {
59 return number.intValue();
60 } else {
61 return 0;
62 }
63 }
64
65 private static Long calculateHash(final String methodName, final Class [] parameterTypes) {
66 int result = 17;
67 result = 37 * result + methodName.hashCode();
68 for (int i = 0, j = parameterTypes.length; i < j; i++) {
69 result = 37 * result + parameterTypes[i].hashCode();
70 }
71 return new Long (result);
72 }
73 } |
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