Hey,
I just read the manual at
https://logging.apache.org/log4j/2.0/log4j-users-guide.pdf. A
reasonably good manual I must say, compared to some products out there.
It doesn't really mention the public API though, only sparsely
throughout the examples. I skipped through the remainder of the
property sections for all the things.
;-).
I am led to believe that I am not meant to configure log4j2 during
program execution. Nor can I change the configuration except by
loading different configuration files.
I am happy to assume that this is rather odd. I would like it if I had
a main configuration file indeed, but...
My application needs to adjust logging levels on the fly. That would
be the levels indicated by LoggerConfig objects.
It would not suffice, really, to have several config files, each for
each wanted state.
Should I use log4j version one?
It seems to be the better choice as the way you keep mentioning it (or
the site/manual mentions it) but I am hesitant always to use older
versions.
I just want my application to be able to e.g. enter a debugging mode
by itself. This would require for instance the levels of certain
LoggerConfigs to be raised or lowered. You might want to enter a
verbose mode where a certain low level component starts outputting data.
Particularly in response to the console, but I might even remotely
monitor my application using a custom shell.
I am glad that in any case there is a default separation of test and
main scripts, because logging may interfere with unit tests.
But I don't really like this static configuration. I was expecting
log4j2 to be really good, but then it says that 3 of the 4
configuration options are not available, and the FAQ summarily states
that if you work around it, your code might break with every minor
revision. Great. Yikes.
That's not a real good way of having a public API ;-). And I can't go
and extend it when I'm just a new user.
What is the solution for me here? I just want to go to a LoggerConfig
and change its level. Ideally I would have different states (that
could of course be represented by config files) that I would load all
in one go (as in, a complete state describing multiple configurations
of different components, belonging together). But I also want to be
able to manually set and remove (change) individual components.
Such would be accomplished by simply changing the level of one
LoggerConfig. Is it not possible?
Regards,
Bart.
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