You might consider talking of this issue with the guys who developped the Eclipse compiler.
With the jdk 1.4 and Eclipse 2.0, you can debug a program, change your source code, and have it being effective without restarting your run (If your change is not too complex of course) ...
Hope this helps,
Simon.
Naveen Kuppili wrote:
This is the scenario - I would like to instrument a code on the fly using custom classloaders. But, if performance degrades to a certain point, I would like to get rid of the changes and in essence "rollback" the changes.
I am just doing a feasibility study of such an approach at this point. Any ideas on how this could be accomplished would be very much appreciated.
Thanks, Naveen Flexetech Solutions, Inc. http://www.flexetech.com
-----Original Message-----
From: Bob Lee [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 27, 2003 5:03 PM
To: BCEL Users List
Subject: Re: Redefining a class on the fly -
What problem are you trying to solve?
Bob
On Wednesday, August 27, 2003, at 02:45 PM, Naveen Kuppili wrote:
From what I understand it, this would require the VMs to run in remotefly
debug mode. This is a good start - but, I was looking more for something
that could do in a real production environment.
Is there a way to trick the VM into forcing a class to be garbage
collected, and re-initiate it? Would it be possible to force a GC of a
class while there are still objects instantiated from it? It kinda seems
impossible to me - but just wanted to air the idea for comments.
Thanks, Naveen Flexetech Solutions, Inc. http://www.flexetech.com
-----Original Message----- From: Bob Lee [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 27, 2003 3:33 PM To: BCEL Users List Subject: Re: Redefining a class on the fly -
Sure, using the JPDA. Actually, Daniel Savarese wrote an article describing your exact case:
http://www.ftponline.com/javapro/2002_09/magazine/columns/proshop/
Bob
On Wednesday, August 27, 2003, at 01:44 PM, Naveen Kuppili wrote:
All,
Is there a way to redefine a class on the fly? I know that we could
have
custom classloaders that could potentially modify byte code on the
unloadwhile loading a class. But, would it be possible to dynamically
the class and redefine it? I want to have a way of "rolling back" my changes that have been done to a class.
Any thoughts on this?
Thanks,
Naveen
Flexetech Solutions, Inc.
http://www.flexetech.com
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