[ZODB-Dev] snapshot isolation how-to

[Adam Groszer]

>Meanwhile, you can download the second version that fixes this bug
>and another one.

Applied, checked, working fine.

What about resetting Transaction._startSerial at a finished transaction?

Should I simply put 'self._transaction = None' at the end of
Connection.close
implementing this is just a snap
-- or --
Something like this:

Transaction.py:
    def _setup(self):
        print 'ZODB.Transaction._setup',t
        self._objects=[]
        self._append=self._objects.append
        self._start()

    def _start(self):
        print 'ZODB.Transaction._start',t
        t= time.time()
        self._startSerial= `TimeStamp(*(time.gmtime(t)[:5] + (t % 60,)))`

but I'm not sure when to call _start():
looks like abort() will maybe call it through self._init() but surely not in
a 'main' transaction
in commit() I would
            del objects[:] # clear registered
+		self._start()
            if not subtransaction and self._id is not None:


>  Probably, I must make a comment that the patch was tested only
>  with the ZODB version distributed with Zope 2.6.1.

Yes, you're right. Don't count the feedback as a complaint, it was thought
more as an enhancement proposal.
I'm developing currently a client(GUI)-server app which has nothing to do
with Zope or even with the web, I'm just using ZODB as persistence on the
server side.

regards,

Adam