[logback-user] What's best practices to maintain logger names in backend configuration files like logback.xml?

[David Roussel]

I tend to keep it simple and have a fairly generic config file and I include it in the jar file of the app. In the file I’ll have only overrides where needed. 
If I want to change logging at runtime then i will set a system property on the command line to override a log level. 

I’ve never needed much more than that. 

Have a look about how to read system properties inside logback.xml

Dave

On Fri, Apr 3, 2020, at 09:22, Thorsten Schöning wrote:
> Hi all,
> 
> I'm using Logback mostly, but things are the same for other logging
> backends in the end. My current approach is to maintain `logback.xml`
> per deployment of some software project, which might be some daemon,
> web app or whatever. If it has an individual deployment and is known
> to use logging at all, it gets an individual config file.
> 
> But should that file contain all logger names known and used by some
> application?
> 
> I did so in the past to clearly document which loggers are available
> at all. Many of those are related to concrete classes and don't need
> to be configured individually in theory, but the most likely available
> root logger is enough already. OTOH, there are use cases for very
> specific loggers which additionally exist per class. Sometimes e.g. I
> have very special status loggers with very custom logging format which
> need to write some data to some special fail or send some mail or
> else. Because those are so special and need to be configured
> specially, they need to be part of the config file always.
> 
> The downside of adding all loggers to those files clearly is
> maintenance overhead: The same logger might be available in multiple
> files, so renames need to be applied everywhere. Newly added loggers
> need to be added to all files, but one can't easily know if some class
> of some package is used in some app only only because some
> package/project is used in that app.
> 
> The benefit of this approach clearly is that at best every admin
> always simply knows which loggers are available by looking into the
> config and can configure log levels for individual loggers of interest
> only. Otherwise one would need to start logging and blacklist things
> clearly not of interest.
> 
> Does anyone else do this or is it not worth the effort?
> 
> Thanks!
> 
> Mit freundlichen Grüßen,
> 
> Thorsten Schöning
> 
> -- 
> Thorsten Schöning       E-Mail: Thorsten.Schoening at AM-SoFT.de
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