Re: MaildirQueue

[email protected] (Jason R. Mastaler) writes:

> The other question - to lock or not to lock?  

After thinking about this some more, I don't think locking will be
necessary.  TMDA delivers to pending/new, and doesn't write to or
rename messages to pending/cur, so there shouldn't be any write
conflicts with MUAs (who rename messages they read to pending/cur).
The only issue is the case where TMDA is looking for a confirmed
message in pending at the same time a MUA is moving it from new/ to
cur/ and renaming it.  There exists the possibility for TMDA to think
that the message is not there, thus returning a bounce
(ACTION_MISSING_PENDING).  I think this can be handled by doing a
small loop and retrying multiple times before giving up and
determining the message is *really* not there.  Since this is a rare
case, the extra computational expense can be justified.