Apply appenderA and AppenderB to the root logger. I always set the root
logger level to WARN to avoid trace/debug/info messages from arbitrary
libraries.
Then, if you want INFO logging for most of your library, configure the lowest
common denominator package for your app, let's say "com.myapp", for the INFO
level.
Now configure the ClassX and ClassY loggers for the DEBUG level.
Now your requirements get complicated. You need to configure filters for both
appenders so that:
1. AppenderB explicitly ignores anything but WARN+, except when logging for
ClassY, in which case it should accept DEBUG+.
2. AppenderA accepts whatever is sent to it except when logging for ClassY, in
which case it should only accept INFO+
You can roll your own filter by implementing the Filter interface [1] or you
could try the extras [2] ExpressionFilter [3]. I'm not an expert on supported
expressions, but you can search for examples, such as [4].
This is an awfully complicated setup. I hope this is just about theory and
not the way you actually intend to use Log4j. Nevertheless, Log4j should be
able to handle it.
[1]
http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/spi/Filter.html
[2] http://logging.apache.org/log4j/companions/extras/index.html
[3]
http://svn.apache.org/repos/asf/logging/site/trunk/docs/log4j/companions/extras/apidocs/org/apache/log4j/filter/ExpressionFilter.html
[4]
http://apache-logging.6191.n7.nabble.com/Multiple-expressions-define-in-one-ExpressionFilter-td7229.html
Jake
On Wed, 2 Oct 2013 11:16:42 +0200
fedinho <fedi...@gmail.com> wrote:
Hi.
No, I do not want to exclude the more severe logging levels, but I want to
enable more verbose logging for specific classes for appender A
independently of appender Bs logging of those same classes, and vice versa:
Appender A and B is defined.
Appender A is logging INFO+ for all by default, while appender B is logging
WARN+ for all.
Class X is logging DEBUG+more severe levels through appender A, but still
logging WARN+more severe levels through appender B.
Class Y is logging DEBUG+more severe levels through appender B, but still
logging INFO+more severe levels through appender A.
+ means including more severe logging levels
Thanks
Fredrik
On Wed, Oct 2, 2013 at 9:35 AM, Remko Popma <remko.po...@gmail.com> wrote:
By default, if you set the level of a logger/appender to debug, it will
process debug, info, warn, error and fatal messages.
Is this what you want, or do you want to include only debug-level messages,
and exclude info, warn, error and fatal messages?
On Wednesday, October 2, 2013, fedinho wrote:
> Thanks for your response Jacob.
>
> I've been looking at the additive feature, but I'm not sure it solves my
> requirement.
>
> Given this configuration, I would like to debug class X on appender A,
but
> still keep the info level messages from class X on appender B.
>
> I was hoping that this line would make this happen, but doesn't seem to
> work.
> log4j.logger.classX=debug, A
>
> Is there a simple example similar to my requirements somewhere?
>
> Thanks
> Fredrik
>
>
> On Tue, Oct 1, 2013 at 6:50 PM, Jacob Kjome <h...@visi.com<javascript:;>>
> wrote:
>
> > On Tue, 1 Oct 2013 18:17:41 +0200
> > fedinho <fedi...@gmail.com <javascript:;>> wrote:
> >
> >> Hi.
> >>
> >> A simple question I hope someone can help me with. This is using log4j
> >> 1.2.x
> >>
> >> I would like to log info level to one appender A and warn level to
> another
> >> appenderB.
> >>
> >> However, I would like to log debug messages from class X to appender
A,
> >> and
> >> debug messages from class Y to appender B.
> >>
> >> Thanks for any tips for a configuration that will work. Threshold is
not
> >> the way to go. Is there a way A and B can have different root loggers
or
> >> categories?
> >>
> >>
> > This is usually done by setting the logger additivity to "false" for
> > either the logger in question or one it inherits from, which
essentially
> > makes the logger with additivity=false the root logger for all
> inheritors.
> > See...
> >
> >
>
http://logging.apache.org/**log4j/1.2/manual.html#**Appenders_and_Layouts<
> http://logging.apache.org/log4j/1.2/manual.html#Appenders_and_Layouts>
> >
> >
> > Kind regards
> >> Fredrik
> >>
> >
> >
> >
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