[ZODB-Dev] Migrating classes in ZODB 3.5.1

[David Binger]

On Nov 9, 2005, at 12:25 PM, Jeremy Hylton wrote:

> I suppose you could run a separate thread that performed this
> conversion in parallel with other activities.  There's a bit of a
> coordination problem to make sure you're done.  It seems other
> application code would need to use the old class definition until the
> update was completed, but that means new references can be created
> while the update is running.  So you'd need some sort of coordination
> to atomically switch from old class to new class when the update was
> completed.

Maybe I misunderstood.  I thought the only issue here was moving
the class to a different module.  Are you supposing that the
class implementation is also changing?