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From "Alexei Zakharov" <alexei.zakha...@gmail.com>
Subject Re: [classlib] logging (was: Re: [classlib][xnet] Problem connecting using SSLSocketImpl)
Date Wed, 18 Oct 2006 10:55:27 GMT
> If you do want to inject application-level tracing then I'd go for
> aspects, which are designed specifically to provide such orthogonal
> behavior to the classlib functionality.

I suppose we still need someone to investigate this field and invent
the acceptable solution. I remember Geir volunteered to do something
in this direction.

Regards,

2006/10/18, Tim Ellison <t.p.ellison@gmail.com>:
> Mikhail Loenko wrote:
> > 2006/10/17, Alexander Kleymenov <kleymenov@gmail.com>:
> >
> > Hi Tim
> >
> >> BTW, there are some logging capabilities in JSSE provider. You can
> >> turn them on by specifying -Djsse=record,prf,socket as an option to
> >> VM. Log output could be useful in problem analysis.
> >
> > You asked why we need logging. Now we have an example.
>
> I maintain that we should not be putting printf's (i.e. calls to
> logging) in the Java code.
>
> We are running on a virtual machine that knows everything about the
> executing code, what methods are being invoked, the actual arguments,
> the state of the stacks and the heap, etc.  There is much more value in
> a good trace story built into the VM than having developers decide a
> priori where the problems are going to be.
>
> By adding logging calls you have a much more significant effect on the
> code base, you hit performance, modify the stack to log the messages,
> bloat the code for readability, and by definition introduce more bugs
> and maintenance overhead.
>
> If you do want to inject application-level tracing then I'd go for
> aspects, which are designed specifically to provide such orthogonal
> behavior to the classlib functionality.
>
> If you look here[1] there is a document that describes the diagnostics
> capabilities in the IBM VM that we use to support our customers.
>
> [1] http://www-128.ibm.com/developerworks/java/jdk/diagnosis/
>
> Regards,
> Tim



-- 
Alexei Zakharov,
Intel Enterprise Solutions Software Division, Russia

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