[ZODB-Dev] RFC: Pre-commit hooks

[Tim Peters]

[Jeremy Hylton]
...
> Perhaps you misunderstand the synchronizer API.  It does not deal with
> data managers at all.  The registered objects just implement
> beforeCompletion() and afterCompletion().

Ya, the interfaces here are wrong.  There is no "synchronizer" interface,
and at the ZODB sprint {after,before}Completion got added to the
IDataManager interface (or already was there, or something -- don't want to
bother chasing down the history of this one).