Steve Alexander wrote:
>  
>  It looks like you want to register something with the transaction
>  machinery of the ZODB for all subsequent transactions, until you
>  unregister it.

Bingo :-) 

>  In which case, I see more what you're getting at now. I was confused by
>  the method name "registerAgent". I guess (in my terminology) it should
>  be "registerPlugIn".

Fair enough, I'm just picking words out of the air ;-)

>  I guess the integer value is to allow a variety of plug-ins to coexist.

correct :-)

>  As far as I can tell, things wouldn't need to register with your stuff
>  per-transaction, so you wouldn't need other methods added to the
>  Transaction class.

I wasn't anticipating anything added to the transaction class. Bearing in mind
that I know less than nothing about transactions in Zope, I was anticipating
whatever initialises and commits transactions would keep a list of the
registered agents (to use my words) and call the appropriate ones, in order, at
the appropriate points.

Would that be possible?

Would it be a good idea?

cheers,

Chris