[logback-user] Setting log levels per context

[Daniel López]

Hi there,

I have been able to separate the different logs of differents web 
applications in a shared host using a sift appender like this one:

<appender name="SIFT" class="ch.qos.logback.classic.sift.SiftingAppender">
<discriminator 
class="ch.qos.logback.classic.sift.JNDIBasedContextDiscriminator"> 
<defaultValue>unknown</defaultValue> 
          </discriminator> 
                        <sift> 

   <appender name="FILE-${contextName}" 
class="ch.qos.logback.core.FileAppender">
   <file>${catalina.base}/logs/logback-${contextName}.log</file>
   <append>true</append>
...
   </appender>
</sift>
</appender>

And so far, it works great. My question now would be if it is possible 
to set different levels for the different contexts in an easy way. I 
know I can copy the library on each application and use a different 
configuration file per webapp (not using logback for the global Tomcat 
then) and I have been able to use Filter to simulate the level setting 
per context by setting the level to the Max and then filtering out the 
levels by context... but I was wondering if there is no easier way to do 
it, as adding filter code for each webapp makes the configuration look 
fragile and bloated. I have 28 small-medium apps in this host, so that's 
why I'm trying to find the simplest way :).

So I guess I'm looking for something like..

<logger name="org.whatever" level="INFO" context="MyApp"...>

Does something like that exist and I was unable to find it? If no, do 
you think it would be intesting? I might give it it shot if that's the case.

Cheers!
D.
-------------------------------------------
Daniel Lopez Janariz (D.Lopez at uib.es)
Web Services
Balearic Islands University
(SPAIN)
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