[logback-user] Split logs to different files by MDC?

[Yura Levandovskyy]

Is it possible to define appender's FileNamePattern from outside of it? If I'm outside the <sift></sift> element I'm also outside of the appender too.


________________________________
 From: ceki <ceki at qos.ch>
To: logback users list <logback-user at qos.ch> 
Sent: Friday, June 15, 2012 3:59:51 PM
Subject: Re: [logback-user] Split logs to different files by MDC?
 

SiftingAppender replays elements found within <sift>...</sift> when it
creates a new appender instance. You probably do not want
SiftingAppender to do conditional configuration each time it creates a
new appender. As such, I would remommend to move the conditional part
outside the <sift></sift> element. Is that possible?
-- 
Ceki
http://twitter.com/#!/ceki

On 15.06.2012 20:26, Yura Levandovskyy wrote:
> Oh wow, I actually haven't noticed that I just have FileAppender, not
> RollingFileAppender
> The 'home' property is defined higher up, so that part works well now
> Thank you for the hint about debug, going to save a lot of frustration
>
> Could you advise on how to use <if> with mdc values? What I'm trying is
> the following:
>
> I have this in my SiftingAppender:
> <discriminator>
> <key>variable</key>
> <defaultValue>default</defaultValue>
> </discriminator>
>
> I want to determine the file name depending on the property, such that
> (inside rollingPolicy):
>
> <if condition='property("variable").equals("default")'>
> <then>
> <fileNamePattern>${home}/logs/generic-logs.%d{yyyy-MM}.%i.log</fileNamePattern>
>
> </then>
> <else>
> <fileNamePattern>${home}/logs/${variable}.%d{yyyy-MM-dd}.%d{HHmm,aux}.%i.log</fileNamePattern>
> </else>
> </if>
>
> At the moment the .equals check seems to fail all the time, and so the
> 1st fileNamePattern is never used. What am I doing wrong?
>
> ------------------------------------------------------------------------
> *From:* ceki <ceki at qos.ch>
> *To:* logback users list <logback-user at qos.ch>
> *Sent:* Thursday, June 14, 2012 1:02:19 PM
> *Subject:* Re: [logback-user] Split logs to different files by MDC?
>
> By the way, since the home property is used within SiftingAppender, it
> should be defined in the "context" scope. Example:
>
> <property name="home" value="/tmp" scope="context"/>
>
> HTH,
> --
> Ceki
> http://twitter.com/#!/ceki <http://twitter.com/#%21/ceki>
>
> On 14.06.2012 18:57, ceki wrote:
>  > Hi Yura,
>  >
>  > There multiple errors in the config you provided (independent of
>  > SiftingAppender). As a general recommendation, you should set the
>  > debug attribute to true to see the errors.
>  >
>  > <configuration debug="true">
>  > ...
>  > </configuration?
>  >
>  > Here are a few hints.
>  >
>  > Hint1: ch.qos.logback.core.rolling.RollingFileAppender not FileAppender
>  > Hint2: SizeAndTimeBasedFNATPExt does not exist
>  >
>  > HTH,

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