To broaded the topic, and I asked this earlier and didn't get any
responses, but do we foresee needing annotations for any of our
geronimo plans?
On Dec 12, 2006, at 12:46 PM, David Jencks wrote:
> I think we have a lot of work to do for annotation processing, and
> I don't recall seeing any discussion of the steps involved. I
> haven't read most of the specs involved so what I say is probably
> full of errors, but this provides a great opportunity to correct
> me :-)
>
>
> I think there are 2 kinds of annotations: some describe something
> about the class that is exposed to the outside world, such as
> @WebService, and some describe something supplied to the class from
> its environment, such as @Resource. The @Resource type
> annotations result in something getting bound in the components
> java:comp/env jndi context, and then that thing getting assigned to
> the annotated field.
>
> I believe all of these need to be translated to the xml in the spec
> deployment descriptor and made available through jsr-77. This is a
> pretty major change to jsr-77 since previously we were supposed to
> provide the dd unchanged as a string.
>
> I think that there is no further information needed for the
> "exposing" annotations: once they are in the xml, we can just
> deploy from the xml and we're done. However for the "resource
> injection" annotations, we still need some code to get the object
> out of jndi and put it into the field.
>
>
> So, here's how I imagine this working:
>
> Deploy time:
>
> 1. scan all the classes for annotations
> 2. process them into the xml descriptor
> 3. deploy from the modified xml descriptor, includiing constructing
> the jndi tree (as done currently)
> 4. add objects to inject resources
>
> Run time:
> start up just like we do now
>
> So, I don't think we have any of this code in geronimo. I suspect
> there is a bunch of simliar code in other projects such as openejb,
> openjpa, and cxf (at least) How much can we crib from elsewhere?
>
> Comments desperately needed :-)
>
> thanks
> david jencks
>
-sachin
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