RE: [aspectj-users] Weaving already loaded classes

[<mohan.radhakrishnan@xxxxxxxxxxxxx>]

Hi,
     Yes. It seems that this API was designed for profiling. Actually I
started poking around this when I found there is a way to use Mustang
jconsole to an already running VM and monitor using JMX/AOP(GlassBox
Inspector) even if you don't start the JSE 5.0 VM with
-Dcom.sun.management.jmxremote.

So when I read that a java agent can be loaded on an already running VM
using the Attach API in mustang, I though it could be of use to AOP.
 
Thanks,
Mohan 

-----Original Message-----
From: aspectj-users-bounces@xxxxxxxxxxx
[mailto:aspectj-users-bounces@xxxxxxxxxxx] On Behalf Of Alexandre
Vasseur
Sent: Friday, December 23, 2005 4:01 AM
To: aspectj-users@xxxxxxxxxxx
Subject: Re: [aspectj-users] Weaving already loaded classes

Mohan

My personnal opinion:
This is actually an attempt from the JSR-163 folks to solve the complex
problem of multiple weaving that I and others had raised 2 years ago.
Retransform is aiming at handling the non retransform capable agents
(see the agent manifest doc)

Sadly, this is really going into hell (see also the tricks to rename
native method and making sure native pointer to the native impl.
beehind are kept in sync by the VM - needed f.e. to do an around like
advice on a native method execution - required by some profiling tool
vendor out there) while we have demonstrated what could be done by
forgetting about bytecode and moving things into the VM directly.
See our standpoint on that f.e. in
http://dev2dev.bea.com/pub/a/2005/08/jvm_aop_1.html (shameless plug)

Alex




On 12/22/05, mohan.radhakrishnan@xxxxxxxxxxxxx
<mohan.radhakrishnan@xxxxxxxxxxxxx> wrote:
> Hi,
>        Any idea if this is useful
> http://download.java.net/jdk6/docs/api/java/lang/instrument/Instrument
> ation.html#retransformClasses(java.lang.Class...)
> ?
> This is a mustang feature called late-binding agent support.
>
> Thanks,
> Mohan
>
>
>
>
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