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From Harry Metske <>
Subject Re: Restart logging?
Date Sun, 06 Sep 2009 16:45:22 GMT

we have our own logging layer ( which talks to slf4j
which talks to a real logging implementation (with log4j as the default).
The first two don't have support for configuring logging at all, the writer
of slf4j says you also shouldn't :
Log4j itself does support dynamic configuration of logging, but that has
explicitly not been put in the slf4j interface.

We do however have some way of dynamically configuring our loggers, and
that's through the MBeans (currently you have to use jconsole to do it, but
a nice GUI for it would still be nice). This is however limited.

So with "restart logging" you could something in that direction, but again,
that is limited to log4j, if you run another logging implementation, you are
left alone in the dark.

BTW, what exactly would be the difference between restarting the engine and
reloading the whole webapp ?


2009/9/6 Andrew Jaquith <>

> Hi all --
> I am doing a bunch of work on the installer/config code. I've already
> got some really cool features implemented (LDAP config and live
> testing, Stripesification of the interface, configuration of multiple
> properties files simultaneously...). One thing I would REALLY like to
> do is to be able to apply changes to the wiki WITHOUT requiring a
> webapp reload.
> To that end, I wrote a restart() method for the WikiEngine, and it
> seems to work perfectly except in one respect: I can't figure out how
> to restart the logging subsystem. Any hints? I'd like to be able to
> allow the admin to specify the desired log file location, and after
> restart all of the logging is redirected there.
> Actually, there is one more thing: how does one set the Priha page
> directory? I'm pretty sure there's a setting in that
> needs to be set, but I don't know what it is.
> Andrew

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