I have an existing application which does all of its logging against log4j. We use a number of other libraries that either also use log4j, or log against Commons Logging, wh
@Yishai - Thanks for posting the link to my wiki. The example there redirects JUL to Log4J and I've had it running in a production system for a few years. JBoss 5.x already redirects JUL to Log4J, so I took it out when we upgraded. I have a newer one that redirects to SLF4J, which I use on a few things now. I'll post that when I get a chance.
However, SLF4J already has it:
http://mvnrepository.com/artifact/org.slf4j/jul-to-slf4j