Re: [aspectj-users] Is it possible to dynamically exclude joinpoints at

[Ramnivas Laddad <ramnivas@xxxxxxxxx>]

Chad,

You can use if() pointcut that checks for information obtained from
thisJoinPointStaticPart to implement such functionality. Please
refer to online documentaion for JoinPoint.StaticPart's API
(thisJoinPointStaticPart's type).

-Ramnivas

--- Chad Woolley <lists@xxxxxxxxxxxxxxxxx> wrote:
> Hello,
> 
> I would like to be able to dynamically define an "exclude" joinpoit
> on my advice 
> at runtime.  For example, say I have:
> 
> pointcut myPointcut(): execution(* *.*(..));
> 
> Object around() : myPointcut() ...
> 
> 
> 
> At runtime, I would like to be able to dynamically define another
> joinpoint 
> which will be added as an "excluded" joinpoint on the advice, in
> order to 
> exclude some package from the advice.  The definition would be
> equivalent to this:
> 
> pointcut myPointcut(): execution(* *.*(..)) &&
>                        !execution(* some.package..*(..));
> 
> Object around() : myPointcut() ...
> 
> 
> Is this at all possible with AspectJ?  My only idea would be to have
> some sort
> of independent pre-processing step which would read the exclusions
> (perhaps from 
> a property file), and then build and write the aspect source out to
> disk, 
> recompile and reweave the app.  Then the app could be re-started with
> the new 
> dynamically defined aspect and the correct exclusions on the
> pointcut.  This 
> definitely wouldn't be at runtime, but it's the only solution I can
> think of. 
> Can anyone think of a more elegant solution?
> 
> By the way, you may be wondering why I don't just write the aspect
> with the 
> correct joinpoint definition in the first place.  The reason is that
> this is 
> part of a framework, and I want a simple API (a method call or
> property file) 
> for users to define classes to exclude from weaving.  I don't want
> the users to 
> have to know AspectJ.
> 
> Thanks,
> Chad
> 
> 
> 
> 
> 
> 
> 
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