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[ews.eclipse.technology.aspectj] Re: RCP & AspectJ
Hi Mario,
We've also done a lot of experimenting with aspects and plugins (strictly, OSGi). The result is the equinox incubator "AOSGi" project (http://www.eclipse.org/equinox/incubator/aspects/index.php), which is a joint Eclipse incubation project between Martin Lippert (AJEER) and the OSGi integration that we developed in Hursley. There's a bunch of code going through legal reviews etc. at the moment, then once it can be uploaded the project should spring into life (Matthew Webster and Martin Lippert are the joint leads). It will give you very nice integration of aspects in bundles (without needing to promote to the system-wide level if you don't want to) and can deliver very good performance. It's also possible to integrate a cache so after you bring up a configuration for the first time, the woven class files are cached - thus subsequent start-up overhead with the same configuration is zero.

Watch this space for more info, and do get in touch with Matthew and Martin because the more real requirements and projects we have in this space the better we can make the support.

Regards, Adrian.

Mario Scalas wrote: 
Hi, all: I've been busy trying to make them (aj & rcp) work together and I'd
like to share my experiences, hoping they could help some other people and
have some of my (confused) ideas clarified.

I've a bunch of aspects scattered along several plugins in my RCP
application: some of them are shared among different plugins so I'd like to
put them in an "aspects collection plug-in".

So I've put my test abstract aspect (a dummy logger) in my aspects plugin,
added this as a plug-in dependency to my own to-be-weaven plug-in,
implemented the concrete aspect using the "participant pattern" explained
in [4] and crossed the fingers. 

Now:
1) the IDE shows the captured join points (good) (see [3])
2) when I execute my application the awaited aspect's output is simply
absent so I guess that my aspects has been forgotten :S (bad)

Then I read on the mailing list about AJEER ([2], Martin Lippert has updated
it to the latest stable AspectJ 5.0 release) and configured my application
as explained in [1]. I've added a second aspect to my aspects plug-in which
implements the worker object pattern as explained in [4] (just using some
custom annotations to mark the methods to be run in a different thread).
Now the console output of my app becomes:

MY PERSONAL ADAPTOR IS CREATED AND WILL START THE FRAMEWORK
Start Weaving Service
aspect promoted to the system:
it.uniba.di.cdg.xcore.aspects.it.uniba.di.cdg.xcore.aspects.AnnotatedAsynchronousExecution,
1.0.0
aspect promoted to the system:
it.uniba.di.cdg.xcore.weaveme.it.uniba.di.cdg.xcore.weaveme.View$OwnLog,
1.0.0
WeavemePlugin.start()
additional classes put in cache:
it.uniba.di.cdg.xcore.weaveme.View$AjcClosure1
[Before] execution(View.createPartControl(..))
[Before] execution(View.setFocus())
[START] AsynchronousExecution.around()
[END] AsynchronousExecution.around()
<snip: some counting follows ...>

Wow, this is nice ... but it is *sloooow*: it takes 20+ seconds on my
p3@xxxxxx / 1G linux box to show the application window (most time seems to
be spent after the "additional classes put in cache:" message): and there
are just two plugins (+ the 2 AJEER plugins and the RCP runtime).

If you are interested you can download my test application in [5]. It is
composed by:
- an aspects plugin which collects all of my test aspects
- a "weaveme" plugin containing the view and product - a "weaveme" feature projects that I used to compose my product since
configuring it with plugins didn't make the eclipse runtime happy (no
product id found :S).
(Obviously you must have the AJEE plugins in your target platform
directory!)

So what are your current experiences with the subject? 

Regards
Mario

Ps: Hmmm ... perhaps this is heavy matters for holidays season :) Merry xmas
and happy new year to all the people out there, anyway.

[1] http://ajeer.sourceforge.net/?cat=3
[2] http://sourceforge.net/projects/ajeer
[3] http://cdg.di.uniba.it/~mscalas/join_points.png
[4] AspectJ in Action (see also
    http://www-128.ibm.com/developerworks/java/library/j-aopwork3/ )
[5] http://cdg.di.uniba.it/~mscalas/ajeer_experiment.tar.gz