Merge lp:~kamstrup/dee/transactions into lp:dee

[Mikkel Kamstrup Erlandsen]

Implement transaction logic for DeeModels in DeeTransaction

This branch implements a new class, DeeTransaction, that implements
transaction isolation on top of any old DeeModel implementation. It
has only one interesting API call so far,namely commit() which does
as labeled.

How/if exactly we want to expose a transactional API on DeeModel itself
is still up in the air; but this work should provide a solid foundation
for that. (and all of the trickier code needed, anything else will be
mostly just gloss).

Since this is a rather complicated afair I recomment that we take a somewhat
functional approach to the review. Validate the testing harness - and possibly
submit a few new test cases to cover the stuff I didn't think of.

[Michal Hruby (mhr3)]

One minor thing:
DEE_TRANSACTION_ERROR_COMMITED -> DEE_TRANSACTION_ERROR_COMMITTED (double T)

[Michal Hruby (mhr3)]

I don't see anything wrong here, so I'll approve this and we can do more tests once it's in trunk. It's nicely isolated anyway...

review: Approve

[Unity Merger (unity-merger)]

Attempt to merge into lp:dee failed due to conflicts:

text conflict in dee/Makefile.am

[lp:~kamstrup/dee/transactions]

351. By Mikkel Kamstrup Erlandsen on 2011-12-15

Sync with trunk