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From: Spencer.Collyer_at_[hidden]
Date: 2005-05-04 03:52:04

> >Thanks!!!
> >
> >Also, an application should have multiple levels at the same
> time (i.e.,
> >an app may want to have a different level of debug logging per
> >component, library, class, whatever).
> >_______________________________________________
> >
> >
> This is an interesting request, and I assume it'll change the way I
> implement multiple levels.
> Is this a desireable feature? What do you all think?
> In other words, if I understand correctly, you want to be able to set
> the level of each log (independently of other logs).
> In this case, instead of enabling/disabling logs, I can
> simply set the
> level of the logs -- and have a level called DISABLED (which is
> equivalent to disabling one log)

Just de-lurking for a moment here, but I'd like to add my vote for a
form of this.

At my work we have a logging library that has concepts of log topics and
log levels. These are orthogonal - any particular log message is
associated with one topic and has one level, but the messages for a
given topic can have any level specified. The topics are arranged in a
tree-like hierarchy, and if a minimum logging level is specified for a
topic it also affects any subtopics of that topic which have not had a
logging level specifically set.

This allows us to easily tune the amount of logging information produced
so that only the items we are specifically working on get logged at a
high debugging level, without interference from components we are not
interested in. This makes tracking problems considerably easier, as only
the relevant information is output.

Just my twopen'orth.


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