SLF4J

Mapped Diagnostic Contexts (MDC)

http://eclipse.org/jetty/documentation/current/example-slf4j-multiple-loggers.html

Logging APIs that Slf4j supports:
Slf4j API
Logback API
Apache Log4j 1.2
JDK 1.4 Logging (aka java.util.logging)
Apache Commons Logging



User their respective Adaptors to redirect logging to SLF4J.


http://logback.qos.ch/manual/mdc.html