[slf4j-user] Trouble setting up logback/slf4j in tomcat.

[Sebastien Pennec]

Hello Jacob,

In Marten's situation, I see three important points.

1. Use logback as a logger for his application.
2. Intercept the logging from other applications and frameworks running under Tomcat 
thanks to jcl104-over-slf4j.
3. Intercept Tomcat's *internal* logging and direct it to logback. I mean: what the 
Tomcat internal classes, like org.apache.catalina.* or org.apache.tomcat.* classes, 
log, by intercepting their calls to commons-logging.

My email was about that last situation. Placing a jar in commons/lib makes it 
available to the applications, but doesn't make it available to the Tomcat classes 
when you launch the server. Maybe I did not express myself very clearly about this 
point, if that is the case, please excuse me.

As far as I know, log4j and logback are not different at this level. On the logback 
side, we do not have a perfect solution to this problem yet.

Cheers,

Sébastien


Jacob Kjome wrote:
> Hi Sebastien,
> 
> Why do you say that logback needs to be in 
> ${catalina.home}/bin and added to the classpath 
> in order to get used for logging by 
> Tomcat?  That's not the case for Log4j 
> integration.  Simply put log4j.jar and 
> commons-logging.jar in common/lib and a config 
> file in common/classes and you've now got Tomcat 
> logging going through Log4j.  Why would this be different for Logback?
> 
> Jake
> 
> At 06:38 AM 12/20/2006, you wrote:
>  >Hello Marten,
>  >
>  >I've just answered to your first email on the logback-user list.
>  >
>  >I'll link the answer here not to leave this message unanswered.
>  >
>  >http://qos.ch/pipermail/logback-user/2006-December/000061.html
>  >
>  >Thanks for your interest in slf4j and logback :)
>  >
>  >Sébastien
>  >
>  >
>  >Marten Deinum wrote:
>  >> For my current project I would like to switch out all the logging which is
>  >> currently being done by log4j and here en there by commons-logging to one
>  >> framework. After some searching I discoverd SLF4J and Logback as the
>  >successor
>  >> to log4j. In your code I swapped out all the 
> log4j and commons-logging to the
>  >> SLF4J api and I want to use Logback as my logger. I converted our
>  >> log4j.properties file with the configuration converter on the website, so I
>  >> assume that is correct.
>  >>
>  >> In the tomcat directory I have the following logging libs (I want
>  >tomcat to use
>  >> SLF4J to)
>  >> commons/lib/commons-logging-1.1.jar
>  >> commons/lib/jcl104-over-slf4j-1.1.0-RC1.jar
>  >> commons/classes/logback.xml
>  >>
>  >> In our webapplication (which is a packaged war and doesn't get
>  >unpacked!) I have
>  >> WEB-INF/lib/slf4j-api-1.1.0-RC1.jar
>  >> WEB-INF/lib/logback-classic-0.7.jar
>  >> WEB-INF/lib/logback-core-0.7.jar
>  >> WEB-INF/classes/logback.xml
>  >>
>  >> The contents of the logback.xml in the commons directory just
>  >contains a simple
>  >> ConsoleAppender and is configured to WARN level.
>  >>
>  >> The file in the WEB-INF directory is configured as a file which should be
>  >> written to c:\logs\mylog.log, configured different levels for
>  >different packages
>  >> we use.
>  >>
>  >> However logback isn't getting picked up, everything is being logged by the
>  >> java.util classes (as it appears thatone is being initialized by
>  >tomcat instead
>  >> of the logback logger).
>  >>
>  >> I tried different configurations, all the logback/slf4j jars in the
>  >commons/lib
>  >> and one config file in commons/classes. Different jars in commons/lib and
>  >> WEB-INF/lib but until now everytime with the 
> same result, only logging to JUL
>  >> and nothing to logback and my configured logfile.
>  >>
>  >> Currently I'm at a loss on what to do and how to make it work. I need some
>  >> assistance with this.
>  >>
>  >> Kind Regards,
>  >>  Marten
>  >>
>  >> _______________________________________________
>  >> user mailing list
>  >> user at slf4j.org
>  >> http://www.slf4j.org/mailman/listinfo/user
>  >>
>  >
>  >--
>  >Sébastien Pennec
>  >sebastien at qos.ch
>  >
>  >Logback: The reliable, generic, fast and flexible logging framework for Java.
>  >http://logback.qos.ch/
>  >_______________________________________________
>  >user mailing list
>  >user at slf4j.org
>  >http://www.slf4j.org/mailman/listinfo/user
> 
> _______________________________________________
> user mailing list
> user at slf4j.org
> http://www.slf4j.org/mailman/listinfo/user
> 

-- 
Sébastien Pennec
sebastien at qos.ch

Logback: The reliable, generic, fast and flexible logging framework for Java.
http://logback.qos.ch/