CL-LOG - a general purpose logging utility

CL-LOG is a general purpose logging utility, loosely modelled in some respects after Gary King's Log5.

Its features include:

• logging to several destinations at once, via "messengers",
• each messenger is tailored to accept some log messages and reject others, and this tailoring can be changed on-the-fly,
• very rapid processing of messages which are rejected by all messengers,
• support for messengers which cl:format text to a stream,
• support for messengers which do not invoke cl:format,
• timestamps in theory accurate to internal-time-units-per-second.

Typically, logging utilities only support the one, simple paradigm of formatting objects to a text-stream. Removing this restriction allows you to:

• log random objects instead of plain text,
• generate internationalized log messages,
• create specialised binary logs,
• base the test-suite of complex applications around logging.

Logging is controlled by the following classes: log-manager, base-messenger, base-message; any of these might be specialised by your application. Whether or not a messenger will accept a given message is controlled by the "categories" of both the messenger and message; categories are logical combinations of atoms (typically keywords).

CL-LOG is released with an MIT-style license.