Re: [aspectj-users] Aspectj discussion

[Wes Isberg <wes@xxxxxxxxxxxxxx>]

(Sorry, accidental send.  To continue...)

The AspectJ project does not work on hot-redeploy of classes in VM's.
It's certainly possible to create a weaving class loader, to weave when
loading, and to load two classes of the same name at different times
or in different parts of the VM namespace, but I suspect that's not
what you're after.

Another approach is to implement joined behavior that varies at runtime,
e.g., traces that don't trace unless tracing is enabled.  (See the venerable
spacewar example for that.)  Before I started grappling with hot-swapping,
I'd try to implement it this way.

As for reusable aspects and aspect patterns, they have been discussed
by the AspectJ community, so it's worthwhile searching the mail archives.

AspectJ supports some reusability, as described in the programming
guide and tutorials, and more is in the works - see the 1.1 design
email discussions, esp. wrt extensible pointcuts and type patterns or scopes.

As for aspect patterns, look to the idioms in the programming guide
and for Hanneman's work rending the GoF patterns in AspectJ:
  http://www.cs.ubc.ca/~jan/AODPs

A good way to discuss either is to put forward some AspectJ code
as a good or bad example.

Wes

Wes Isberg wrote:

> This implementation of AspectJ is a compiler/weaver.  It assumes that
> all aspects are defined before any classes are woven, and it makes no provision for
> (indeed, it prohibits) reweaving a woven class.  I personally think that's the
> right answer -- that aspects should apply to a namespace in its entirety
> for the crosscutting to be implemented correctly.
>
> The AspectJ project does not work on hot-redeploy of classes in VM's
>
> "Sean R. Drucker" wrote:
>
> > I would like to learn about "Weaving different advices for the same class at
> > different times without stopping the JVM" as well.  If you find some source,
> > please post it back this list.
> >
> > Thanks... Sean
> >
> > ----- Original Message -----
> > From: "Mohan Radhakrishnan" <mradhakrishnan@xxxxxxxxxxxxxxxx>
> > To: <aspectj-users@xxxxxxxxxxx>
> > Sent: Tuesday, May 06, 2003 7:48 AM
> > Subject: [aspectj-users] Aspectj discussion
> >
> > > Hi,
> > >
> > > I am a newbie. Is this a very low volume list? I am interested in using
> > > aspects. Have read some of the code of the nanning project since it is a
> > > framework using dynamic proxies etc.
> > >
> > >       Is there a more popular forum somewhere? I don't receive many mails.
> > >
> > > The idea is to learn about
> > > 1. Reusable aspects.
> > > 2. Weaving diffent advices for the same class at different times withou t
> > > stopping the JVM.
> > > 3. Aspect patterns
> > >
> > > Mohan
> > >
> > > _______________________________________________
> > > aspectj-users mailing list
> > > aspectj-users@xxxxxxxxxxx
> > > http://dev.eclipse.org/mailman/listinfo/aspectj-users
> > >
> >
> > _______________________________________________
> > aspectj-users mailing list
> > aspectj-users@xxxxxxxxxxx
> > http://dev.eclipse.org/mailman/listinfo/aspectj-users
>
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