[ZODB-Dev] Pluggable transactions logic
Steve Alexander
steve@cat-box.net
Fri, 27 Jul 2001 19:25:02 +0100
John,
We're thinking about how to make the ZODB Transaction module so that it
can have extra stuff plugged in.
We've now got two use-cases, and I'd like to start thinking about what
sort of API is needed to support these four cases:
* Transaction logic is left as-is
* Extra Transaction stuff from ZCF gets plugged in
* Extra Transaction stuff from TransactionAgents get plugged in
* Both ZCF and Transaction agents are running in the same system
There are a couple of obvious solutions:
* The ZODB gets distributed with the joint capabilities of
TransactionAgents and ZCF's transaction stuff in, by default
* The ZODB gets an API to support plugging in arbitrary processing at
various points in transaction processing.
The former approach is nice iff ZCF and TransactionAgents represent
everything you could want to do with transactions. It is also good if
there is signigicant overlap in what the two add-ons are doing.
The latter approach is best if you want to keep ZODB simple, but allow
arbitrary other more complex transaction processing to happen, in
arbitrary combinations.
Any thoughts?
I still need to look through the ZCF code. I'll try to get around to it
soon.
--
Steve Alexander
Software Engineer
Cat-Box limited