Re: [aspectj-users] Type introspection using joinpoints

[Ramnivas Laddad <ramnivas@xxxxxxxxxxxxxxx>]

Take a look at how the Spring framework uses classpath scanning to
implement a similar idea. In its case, it uses classpath scanning
along with autowiring to compose the application.

-Ramnivas

On Sun, Mar 22, 2009 at 4:38 AM, Ruben Vermeersch <ruben@xxxxxxxxxx> wrote:
> Hi,
>
> I am currently working on a masters thesis on aspect-oriented middleware
> platforms. In these platforms, services are usually composed with the
> application, by means of annotations. This makes aspects (and aspectj in
> particular, which I have chosen to be my platform to build upon) a
> perfect fit for inserting the middleware services into the application.
>
> The grand idea is that I separate each middleware service into an small
> module. Upon launching an application, dependency analysis is performed
> and the application is combined with exactly its needs, using load-time
> weaving. The effect being that the application runs in a just-in-time
> created middleware architecture, fit to its needs.
>
> This works fine for some cases, but in others I have found the joinpoint
> model lacking, or I am still looking for a good way to handle them.
>
> As an example: Declaring @WebService on a class might imply that this
> class is accessible as a SOAP service.
>
> To provide this SOAP endpoint, I have to register this class with the
> web stack. This has to occur when starting the application, so I need a
> way to match all classes annotated with @WebService and act upon them.
>
> If I understand correctly though, load-time weaving is only performed
> when actually loading the class, so there's no way to find these classes
> until they are invoked.
>
> Does anyone know a solution to this problem? Is it possible to do type
> introspection using joinpoints?
>
> All help appreciated!
>
> Thanks already,
>   Ruben Vermeersch
>
>
> --
> Ruben Vermeersch (rubenv)
> http://www.savanne.be/
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