Log5 is a Common Lisp logging framework organized around five things: categories, outputs, senders, messages and contexts.
Categories organize log messages into groups. They are like log4j's Loggers only they're not necessarily arranged hierarchically;
Senders take care of getting log messages somewhere useful. The correspond to log4j's Appenders;
the Outputs of a Sender specify what actually gets sent, printed, spoken, and so on.
Messages are the actual log statements in your code
and the Context provides a way to annotate log messages dynamically (useful, for example, if an application serves multiple clients). Log4j calls this a *Nested Diagnostic Context* but that's too high-faluting for me.
For more details, see the overview or the user-guide.
log5 is implemented and stabile.
Metabang.com uses darcs for source control; the log5 repository is at:
darcs get http://common-lisp.net/project/log5 You can use ASDF-Installing or just download a tarball. It's also on the CLiki. Common-Lisp.net hosts the project's mailing list:
You can also follow development on unCLog.
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22 December 2007 - Some bug fixes and minor tweaks
29 June 2007 - log5 is updated with compile-time log categories and a handy debugging facility.
19 April 2007 - log5 has seen a bunch of minor development over the last few months. The biggest changes are
start-sender are now evaluated. So instead of
(start-sender ... :output-specs (time message)) you must write
(start-sender ... :output-specs '(time message)) (Note the added quote).
I fixed a horrible performance bug which caused all the arguments to log-for to be evaluated regardless of whether or not the logger was active (ack!)
I fixed another performance bug in the file-stream handling. This bug also caused a problem when logging to string streams under Allegro.