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1. 3790016
bill.burke Jul 6, 2003 10:46 PM (in response to lucas26)> People, I am moving from aspectJ and I found two
> concerns about jboss-aop:
>
> Some of my aspects work over "metaphors" that I
> define as Interfaces (very much like serializable
> interface).
>
I've been meaning to add an "instanceof" attribute to pointcuts. Didn't have time to, sorry....
> I found that xml configuration does not support
> subclassing as patterns (right?). So I moves to use a
> ".*" pattern and filter throught
> InvocationFilterInterceptor interface.
>
> 1) The first problem I found is that a ".*" pattern
> does not work. The system can not found my Main class
> my invocation object (for testing purposes) filter
> the unwantend pointcuts.
>
> 2) The "public boolean intercepts(Invocation iv)" is
> never called, when I explicit do:
>
> public boolean intercepts(Invocation iv) {
> System.out.println( "it works?: "+iv);
> return false;
> }
>
> my aspect continues to work. and notthing is dumped
> on screen.
>
I removed this filter. It no longer exists.
> ===========================
>
> By the way: I do preffer to use that way than have a
> specific filter for subclasses. That way is much more
> flexible.
>
> ===========================
>
> And I like also to congratulate the developers behind
> this. It is far better than AspectJ.
What you can do is tag the classes you want to apply interceptors to in the following way.
<class-metadata group="yourtag" class="org.your.TheClass"/>
<interceptor-pointcut group="yourtag">
<interceptor....>
....
You can have an interceptor that is triggered by a metadata tag. This will be trigger by JSR-175 when it is available. See the AOP docs for more info.
Bill -
2. Re: Moving from AspectJ
lucas26 Jul 7, 2003 1:53 PM (in response to lucas26)>
> You can have an interceptor that is triggered by a
> metadata tag. This will be trigger by JSR-175 when
> it is available. See the AOP docs for more info.
>
Yes, I already doing that way.
For example to tag objects that is unmodifiable. I.E. once constructed this objects never change. It was natural to me to tag with a interface (like the cloneable and serializable interfaces).
My point was: Metadata (as it is) resembles very much a deployment descriptor. And a "unmodifiable" its more a characteristics of the object than a deployment strategy like persistence.
Did you get my point?
But Looking in the JSR-175 proposal, it seems that the metadata will be embeded directly into the POJO which really solve the problem.
Thanx Bill
=========================
>
> I removed this filter. It no longer exists.
>
Supposing that this filter was working at load time it seems to me a very good idea. Why this filter was removed?
=========================
I see references to a effort to make aspects that work outside jboss. What is the view of the developers about that? is it a feature or it is a direction?
I think that aop probably will improve and/or aftewards replace the current ejb containers. How is the feeling of the developers of other jboss projects about that?
I feel that aop probably will improve and/or afterwards replace the current ejb containers. How is the feeling of the developers of other projects about that? -
3. Re: Moving from AspectJ
bill.burke Jul 7, 2003 11:57 PM (in response to lucas26)> >
> > You can have an interceptor that is triggered by a
> > metadata tag. This will be trigger by JSR-175
> when
> > it is available. See the AOP docs for more info.
> >
>
> Yes, I already doing that way.
>
> For example to tag objects that is unmodifiable. I.E.
> once constructed this objects never change. It was
> natural to me to tag with a interface (like the
> cloneable and serializable interfaces).
>
> My point was: Metadata (as it is) resembles very much
> a deployment descriptor. And a "unmodifiable" its
> more a characteristics of the object than a
> deployment strategy like persistence.
>
> Did you get my point?
>
Yes, you want immutable tags? I will implement instanceof when I get a chance.
> But Looking in the JSR-175 proposal, it seems that
> the metadata will be embeded directly into the POJO
> which really solve the problem.
>
> Thanx Bill
>
Yes, I can't wait for JSR-175. In the meantime, you can use the XDoclet integration to mimic it for now.
> =========================
>
> >
> > I removed this filter. It no longer exists.
> >
>
> Supposing that this filter was working at load time
> it seems to me a very good idea. Why this filter was
> removed?
>
Because you can easily implement it yourself within the interceptor.
> =========================
>
> I see references to a effort to make aspects that
> work outside jboss. What is the view of the
> developers about that? is it a feature or it is a
> direction?
>
Some things can work outside of the app server, some things can't.
> I think that aop probably will improve and/or
> aftewards replace the current ejb containers. How is
> the feeling of the developers of other jboss projects
> about that?
>
The general movement is towards POJOs. EJB 3 may move in this direction as well.
Bill