setting logging level per KLogger instance in run-time

[vak]

Q: is it possible to set the logging level in a run-time not globally, but per KLogger-instance?

Ideally it should be agnostic of underlying logging framework. That is, it would be ideally done within this kotlin-logging library via some setLogLevel member function.

This would be extremely useful for enabling individual log-levels for different modules, class instances, etc.

Unfortunately, logging is a deep ocean, we'd be happy to swim across it without sinking in underlying logging frameworks :-)

[github-actions]

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[oshai]

Thanks for raising the issue. I don't think I have a good answer ready for you, but I will write few thoughts.
The lib started as a facade for JVM and as such it delegates everything to the underlying (slf4j) framework. In jvm, not all frameworks support dynamically change of level.
Now in multi-platform it somehow makes sense as the lib act as a low level lib (not facade). It mostly makes sense for platforms inherit from direct. I am not sure what platform you had in mind, but we can continue the discussion from there.

[vak]

@oshai, thank you for responding. I am using Kotlin on a daily basis for 1 year only and am still quite shallow on JVM ecosystem. Therefore I asked my colleagues for help on this part :-)

However, my naive hope is that such setLogLevel() function should either set the log level if it is supported by underlying logging framework or it should just spit an error once "can't set logging level for ..." without any effect if the underlying logging framework doesn't support this.

[oshai]

You can see some more details how to do it in here. Right now I don't have any plans to add it to the lib.