GAE Logging

By default GAE's admin console supports fine control of the Java Logging Framework (JDK Logging). The configuration format can be learnt from the ${JDK_HOME}/lib/logging.properties file.

http://code.google.com/intl/en/appengine/docs/java/runtime.html#Logging

http://docs.oracle.com/javase/1.4.2/docs/api/java/util/logging/LogManager.html