[aspectwerkz-user] Advisable.aw_addAdvice at a class definition level
[email protected] Wed, 23 Nov 2005 09:12:40 -0000
| Newsgroups | gmane.comp.java.aspectwerkz.user |
|---|---|
| Message-ID | <[email protected]> |
Hi All,
I am new to Aspects and this may be a stupid question so apologies in advance if it is.
I am using the Advisable interface to add some BeforeAdvice behaviour to a method call on an object I created with the Proxy.newInstance() method. This is well and good, but what I really want to do is to add the given BeforeAdvice to all instances of the class as I will have no control over its instantiation in reality. I need to use the Java API for this as these pointcuts will be specified on the fly.
I have attached a small class below to demonstrate the problem a bit more effectively than via my words.
Any help would be greatly appreciated.
Derek
public class Callback {
public void step1() {
System.out.println(" - TraceMe1.step1");
step2();
}
protected void step2() {
System.out.println(" - TraceMe1.step2");
}
public static void main(String[] args) {
// get a proxy instance
System.out.println("\nINFO:: ------ get a weaved proxy to the Callback class -----");
Callback callback = (Callback) Proxy.newInstance(Callback.class, false, true);
// adding around interceptor using Advisble API
System.out.println("\nINFO:: ------ adding aspects on the fly -----");
((Advisable) callback).aw_addAdvice(
"execution(* *.step1())",
new BeforeAdvice() {
public void invoke(JoinPoint jp) throws Throwable {
Object target = jp.getTarget();
System.out.println("about to call step1() in Target: " + target);
}
}
);
// invoking the method chain with the added around interceptor
System.out.println("**** callback.step1()");
callback.step1();
// what do I need to do to get the BeforeAdvice to work on this object without creating it via the Proxy?
Callback callbackNonProxied = new Callback();
System.out.println("**** callbackNonProxied.step1()");
callbackNonProxied.step1();
}
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