Re: pending queue design

A first cut at the pending queue abstraction code is now in SVN.

See http://article.gmane.org/gmane.mail.spam.tmda.cvs/3174

Currently, "OriginalQueue", which is the current queue format, is the
only one available.  I just wanted to get the framework up, but now I
plan to write a Maildir compatible option as well, and perhaps others
(such as MySQL) too, and then add code to let users select from their
config file.

tmda-filter and tmda-pending should still work without any config
changes.  tmda-cgi has not been tested, but scanning quickly through
the code, I see that it does some direct pending queue scanning,
looking for "*.msg" files.  This will need to be changed.  tmda-cgi
should use the TMDA.Pending and TMDA.Queue.Queue interfaces only from
now on so that it will work with any pending queue format.  Hopefully
someone familiar with tmda-cgi (Jim?) can take a look at this soon.

The TMDA.Queue.Queue interface isn't set in stone yet, so any
suggestions are welcome.  I think writing another type of queue or two
will help me work out whether this needs to be changed or not, and how.

I can't believe I still remember how to program after 2+ years of not
writing a line of code in any language.  I guess it's like riding a
bike, or something....  :-)