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From Scott Coleman <scott.cole...@soltima.com>
Subject RE: automatic trace insertion
Date Tue, 18 Dec 2001 14:57:50 GMT

I have not read the whole article yet, but I think you will get a heavy
performance penalty if you use JPDA. 
Can someone please explain to me why you would want to log both entry and
exit calls, for such a thin layer in the code. I thought that it was meant
to be very fast. So why would you want to add the performance overhead of
logging entry and exit information. If you were to go down this path would
it not be better to use jdk 1.4's new assert feature ?


-----Original Message-----
From: Cakalic, James [mailto:James.Cakalic@heybridge.com]
Sent: Monday, December 17, 2001 11:37 PM
To: 'Log4J Developers List'
Subject: RE: automatic trace insertion

This article about Jylog -- a JPDA based logging generator -- just appeared
on JavaWorld. Perhaps it relevant?


> -----Original Message-----
> From: Paul Glezen [mailto:pglezen@us.ibm.com]
> Sent: Monday, December 17, 2001 4:25 PM
> To: Log4J Developers List
> Subject: Re: automatic trace insertion
> Hi Benson,
> It's not as easy as it looks to do "intelligently".  While it is often
> taught that methods should have a single entry point and exit 
> point, not
> many programmers adhear to this.  It is not at all uncommon 
> to find return
> statements in if-blocks and try-catch blocks.  Sometimes the 
> exit logic can
> get very convoluted.
> I've always been partial to single exit logic.  I didn't 
> become a fan until
> trying to insert trace statements, just as you describe, in 
> other people's
> code.  It can be a nightmare.
> - Paul
> Paul Glezen
> Consulting IT Specialist
> IBM Software Services for WebSphere
> 818 539 3321
> Benson Chen <benson@porivo.com>@porivo.com on 12/17/2001 01:57:15 PM
> Please respond to "Log4J Developers List" 
> <log4j-dev@jakarta.apache.org>
> Sent by:  bchen@porivo.com
> To:   log4j-dev@jakarta.apache.org
> cc:
> Subject:  automatic trace insertion
> Hi all,
> I'm interested in automatically inserting log4j trace 
> statements at the
> beginning of all methods and right before the end of a method (return
> statement or thrown exception).  I'm presuming most people have worked
> on projects with extensive class libraries and it would be great if
> there was a class parser that could intelligently insert log4j
> statements automatically.  If there isn't anything out there 
> like that,
> does anyone know of a java class parser that can be used to 
> do this sort
> of thing?  Thoughts or ideas?  Thanks!
> --
> Benson Chen
> Director of Software Engineering
> Porivo Technologies, Inc.
> Phone: (919)806-0566x12
> E-Mail: benson@porivo.com
> "Measuring end-to-end Web performance"
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