How to send java.util.logging to log4j?

Question

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

Answer 1

There is a simpler alternative than SLF4J to bridge JUL with log4j, see http://people.apache.org/~psmith/logging.apache.org/sandbox/jul-log4j-bridge/examples.html

You just have to put the jul-log4j-bridge on the classpath and add a system property:

-Djava.util.logging.manager=org.apache.logging.julbridge.JULBridgeLogManager

jul-log4j-bridge is not in Maven Central and can be fetched from this repository:

  psmith
  http://people.apache.org/~psmith/logging.apache.org/repo
  
    false
  

and then used with:

  org.apache.logging
  apache-jul-log4j-bridge
  1.0.0-SNAPSHOT
  test
  
    
      log4j
      apache-log4j-component
    
  

It's also possible to rebuild it from sources with the following steps:

1. svn co http://svn.apache.org/repos/asf/logging/sandbox/jul-to-log4j-bridge/
2. edit pom.xml, replace the dependency on log4j:log4j:1.2.15 with log4j:apache-log4j-extras:1.2.17 and remove the dependency on apache-log4j-component
3. mvn package