Log::Log4perl lets you remote-control and fine-tune the logging behaviour of your system from the outside. It implements the widely popular (Java-based) Log4j logging package in pure Perl.
It allows you to control the number of logging messages generated at three different levels:
* At a central location in your system (either in a configuration file or in the startup code) you specify which components (classes, functions) of your system should generate logs.
* You specify how detailed the logging of these components should be by specifying logging levels.
* You also specify which so-called appenders you want to feed your log messages to and which format they should be in.