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1
6
7 import fr.emn.info.eaop.*;
8 import fr.emn.info.eaop.aspect.*;
9 import fr.emn.info.eaop.event.*;
10
11 import java.lang.reflect.*;
12
13 class Billing extends Aspect {
14
15 public Event nextPointCutClient() {
16 boolean ok = false;
17 Event e = null;
18 while (!ok) {
19 e = nextEvent();
20 ok = (e instanceof MethodReturn)
21 && ((MethodReturn)e).method.getName().equals("makeRequest");
22 }
23 return e;
24 }
25
26 public Event nextPointCutService() {
27 boolean ok = false;
28 Event e = null;
29 while (!ok) {
30 e = nextEvent();
31 ok = (e instanceof MethodCall)
32 && ((MethodCall)e).method.getName().equals("serve");
33 }
34 this.isCrosscutting = true;
35 return e;
36 }
37
38 public void definition() {
39 while (true) {
40 Event e1 = nextPointCutClient();
42 int clientId = ((Client)(((MethodReturn)e1).receiver)).id;
43 Event e2 = nextPointCutService();
44 String  serviceId = ((Service)(((MethodCall)e2).receiver)).id;
45 this.print(serviceId, clientId);
47 }
48 }
49
50 public void print(String service, int client) {
51 System.out.println("\tbill service " + service
52 + " to client " + client);
53 }
54
55 }
56
57 class Profiling extends Aspect {
58
59 public Event nextPointCut() {
60 boolean ok = false;
61 Event e = null;
62 while (!ok) {
63 e = nextEvent();
64 ok = (e instanceof MethodCall)
65 && ((MethodCall)e).method.getName().equals("print");
66 }
67 this.isCrosscutting = true;
68 return e;
69 }
70 public void definition() {
71 int n=0;
72 while (true) {
73 Event e = nextPointCut();
74 this.isCrosscutting = true;
75 n++;
76 System.out.println("\tprofile n=" + n);
77 }
78 }
79 }
80
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Java API By Example, From Geeks To Geeks.