problem with @args

[rutek]

Hi
AOP is something new for me, but i udenrstand most of it. However I have problem with @args. I dont know how to use it.

I know how to use @annotation, and i thought that it could be similar. I have my annotation like @giveInfo and i use it like this:

@giveInfo
public void dummyMtehod() { }

and have advice

@Before("@annotation(package.annotation.giveInfo)" )
public void annotationAdvice(JoinPoint jp) {
System.out.println("Advice @Before " + jp.getSignature());
}

and it work fine.

So using this i thought to use @args. Class will be like this:

public void dummyMethod2(@giveINfo int number) {}

and advice like this:

@Before("@args(package.annotation.giveInfo)")
public void annotationAdvice2(JoinPoint jp) {
System.out.println("Advice @Before " + jp.getSignature());
}

it dont make any error at eclipse, but its dont give me any results, so in my opinion its not work good.

some suggestion?
maybe simple example of using this?
i hope knowing how to do @args other (@target, @within) wont be a problem.

[chelu]

@args have two usage escenarios:

• Match argument types at runtime annotated with some annotation: @args(javax.persistence.Entity) will match all methods with one argument type when at runtime receive a type annotated with @Entity. ie it will match Dao.save(Book) if Book is a JPA Entity.
• Bind arguments to advice.

In your post you want to match calls to execution of a method with annotated parameter, that will be matched with: execution(* *(@SomeAnnotation (*))); Note the parentheses around the wildcard.

Note: Use code tags for code, no quotes

Cheers

[rutek]

thank you!

i use you advice about advice and it work ;-)

public void dummyMethod2(@giveINfoint number) {}

@Before("execution(* *(@giveINfo(*)))")
public void annotationAdvice2(JoinPoint jp) {
	System.out.println("Advice @Before " + jp.getSignature());
}

i dont know why, but i had big problem to find any full example how to use it... example at documentation of Spring 3.1 wanst good for me