[slf4j-dev] MDC Type functionality

[Ceki Gülcü]

At 03:40 PM 3/26/2007, Gardiner, Paul wrote:
>I have written an SLF4J binding to the Equinox extended log service, which 
>is an extension of the OSGi logging service, that includes contextual 
>information, and passes “isLoggable” statements through to log listeners 
>(readers).  The problem I have is supporting extra data that is not part 
>of the log message.  SLF4J does not include MDC or NDC functionality, so I 
>am not sure of the best way to pass through this kind of data.  A typical 
>use case is session id, which is passed as MDC.  When the log entry is 
>made, the session id is included in the file appender, but omitted from an 
>appender that sends pages.  One solution is to read all MDC data and pass 
>it through to the OSGi log service, and then recreate it in the log 
>reader.  However, I was wondering if there was a more elegant/less 
>expensive solution.

As for a more elegant solution, end-user code could use the more advanced 
features of such and such logging system *directly*. However, I guess that 
is not an option for a general purpose library such as equinox.

>Thanks,
>Paul

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