On Fri, Sep 13, 2002 at 02:59:41PM +0200, Sylvain Wallez wrote:
> Marcus Crafter wrote:
>
> >Hi All,
> >
> > Hope all is well.
> >
> > I've been playing around with adding excalibur instrumentation
> > support to cocoon over the past couple of days
> > (http://jakarta.apache.org/avalon/excalibur/instrument/index.html)
> >
> > The initial results look quite nice (a sample screenshot of the
> > instrument client in action is available at
> > http://cvs.apache.org/~crafterm/instrumentation.jpg), allowing you
> > to see what's going on inside your cocoon application as it happens.
> >
> > Does anyone see any problems with adding this support to HEAD (or
> > should I wait till after 2.1 is released) ?
> >
> >
>
> +1e1000 for HEAD now !!!
>
> This looks really, really cool.
Yes, I think it rocks! :)
> A question that customers often ask is "how can I debug or tune the
> application". By combining this extra-cool instrumentation, the profiler
> and captor, we're starting to have good answers.
>
> A question however about the cost of instrumentation : is it possible to
> know if an instrument is active to avoid costly value computations, in
> the same way as we test logger.isDebugEnabled() ?
Yes, the instrumentation api is similar to the logkit api in that
sense - AbstractInstrument
(http://jakarta.apache.org/avalon/excalibur/instrument/api/org/apache/excalibur/instrument/AbstractInstrument.html)
defines an isActive() method which can be tested to see if the
instrument is currently being used.
On top of that I've added a general 'enable-instrumentation'
startup parameter which can be used to completely disable
the creation of an instrument-manager if its not needed.
Cheers,
Marcus
--
.....
,,$$$$$$$$$, Marcus Crafter
;$' '$$$$: Computer Systems Engineer
$: $$$$: ManageSoft GmbH
$ o_)$$$: 82-84 Mainzer Landstrasse
;$, _/\ &&:' 60327 Frankfurt Germany
' /( &&&
\_&&&&'
&&&&.
&&&&&&&:
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, email: [EMAIL PROTECTED]
