[Zope3-dev] Data manager interface -- tpc_begin and other changes

[Garrett Smith]

Jim Fulton wrote:
> This is for people who've implemented ZODB data managers.  Data
> managers are components that manage persistent data under transaction
> control, 
> 
> We've recently tried to clean up and document the data-manager
> interfaces.  In addition, over the weekend, I implemented savepoints
> and was able to simplify the interfaces quite a bit.  See IDataManager
> and ISavePointDatamanager in:
> 
>   
>
http://svn.zope.org/ZODB/trunk/src/transaction/interfaces.py?view=markup
> 
> In particular, note that:
> 
> - The subtransaction APIs have disappeared fro data managers, and
> 
> - tpc_begin no longer takes a second "subtransaction" argument.
> 
> I *could* try to provide support for data managers with tpc_begin
> taking 2 arguments, but I'm guessing that I don't need to.  I'm
> guessing that no one has written data managers that require a second
> argument. If this is not true and you have a data manager that
> requires a second argument that I need to support, please let me know.
> 
> Jim

This looks outstanding...thanks for the communiqué :-)

For my part, I'm not using substransactions, so the simplified tpc_begin
is not a problem.

 -- Garrett