On Fri, 9 May 2008, Erskine, Thomas (IT) wrote:
> The other logs an event to Netcool (specifying warp_message=0) and it
> works fine. It allows you to call log like:
>
> $logger->log($level, $msg, $key)
>
> so that you can specify a Netcool alert key.
>
> Then comes the problem: I made a configuration file including both
> appenders. Now I lose. The Netcool appender continues to work nicely.
> However, the file appender mashes all the args together if I specify the
> key. Which is the expected behaviour for it, but then I can't use the
> key feature with netcool. I could make it work by setting
> warp_message=0 on the file appender, but to do that I have to set the
> layout to NoopLayout, so I can't get nicely formatted log entries there.
>
> It seems as if there is no way to use both types of appender (with
> warp_message=0 and without) in the same config file. Or am I missing
> something?
Hi Thomas,
It seems like you want a statement like
$logger->log($level, $msg, $key)
to have two different meanings, depending on which appender the message
ends up at.
On the Netcool appender, you want it to use the $key for a special
purpose, on the file appender, you want it to sweep $key under the
carpet -- seems inconsistent to me, as it's not clear what another
random new appender would do with this.
For cases like this, I would stuff the Netcool key in the MDC:
http://log4perl.sourceforge.net/d/Log/Log4perl/MDC.html
So instead of saying
$logger->log($level, $msg, $key);
you would say
Log::Log4perl::MDC->put("netcool-key", $key);
$logger->log($level, $msg);
and the Netcool appender would either fetch the the key from the
MDC in its log() method and do something with it or you could access it
as %X{netcool-key} in the layout:
http://log4perl.sourceforge.net/d/Log/Log4perl/Layout/PatternLayout.html
Would that work for you?
Can I post this message to the mailing list? Looks like this could be
useful for other folks as well.
-- Mike
Mike Schilli
[EMAIL PROTECTED]
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