A common interface shared by log4j components.
Interface used to listen for Logger related events such as add/remove appender or changing levels.
Interface used to listen for LoggerRepository related events such as startup, reset, and shutdown.
An interface that defines the required methods for supporting the setting and getting of a level threshold.
Most log4j components derive from this class.
Used to store special log4j errors which cannot be logged using internal logging.
An implementation of ULogger on org.apache.log4j.Logger.
A no operation (NOP) implementation of
A simple implementation that logs messages of level INFO or higher on the console (
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