Making the messages observations (using something like, oh, Class::Observable) would be very flexible as well and you'd get for free object/class/subroutine registration to receive the messages. Just a thought.

I don't understand its documentation, and think the module is too advanced. Perhaps it's one of those things for which you have to know Java in order to understand. I made transactions.pm to be tiny and easy, and using a heavy module would not help it be easy to use.

Juerd # { site => 'juerd.nl', plp_site => 'plp.juerd.nl', do_not_use => 'spamtrap' }