[ZODB-Dev] ZODB _v_ attributes are tricky

[Shane Hathaway]

Dieter Maurer wrote:
> Shane Hathaway wrote at 2004-4-2 11:48 -0500:
> 
>>...
>>Instead, ZODB ought 
>>to provide two kinds of documented descriptors: Volatile and 
>>TransactionalVolatile.  Volatile attributes revert to the default state 
>>at any time; TransactionalVolatile attributes reliably revert to the 
>>default state upon commit or rollback (including savepoint commit or 
>>rollback).
> 
> 
> I fear, we need more kinds:

These are all fine.  One way to implement these new descriptors is to 
attach data to the Connection object.  The Connection is able to keep 
data beyond transactions, and can also zap things according to transactions.

Shane