So I'm about to update the transaction package and this gives me an
opportunity to do something I've been meaning to do for a while, which
is to add support for the Python with statement:
with transaction:
... transaction body ...
and:
with some_transaction_manager as t:
I'm already using custom transaction/savepoint context managers in my
code. I use them like
with TransactionContext():
db.root['sp_test'] = 'init'
with SavepointContext():
db.root['sp_test'] = 'saved'
On of the context managers:
class TransactionContext(object):
def
def __exit__(self, t, v, tb):
if t is not None:
self.txn.abort()
else:
for i in range(self.retryCount):
Oops, bug here. It should read range(1 + self.retryCount). It should
probably have unittests anyway :-)
-Matthias
On Tue, May 11, 2010 at 7:34 AM, Jim Fulton j...@zope.com wrote:
[...] The best I've been
able to come up with is something like:
t = ZODB.transaction(3)
while t.trying:
with t:
... transaction body ...
I think you could get this to work:
for transaction in
On Tue, May 11, 2010 at 7:52 AM, Nitro ni...@dr-code.org wrote:
I'm already using custom transaction/savepoint context managers in my
code. I use them like
...
Now you could probably extend this to look like
class TransactionContext(object):
def __init__(self, txn = None, retryCount =
On Tue, May 11, 2010 at 8:38 AM, Benji York be...@zope.com wrote:
On Tue, May 11, 2010 at 7:34 AM, Jim Fulton j...@zope.com wrote:
[...] The best I've been
able to come up with is something like:
t = ZODB.transaction(3)
while t.trying:
with t:
... transaction body
On Tue, May 11, 2010 at 10:08 AM, Jim Fulton j...@zope.com wrote:
This is an improvement. It's still unsatisfying, but I don't think I'm going
to
get satisfaction. :)
Given that PEP 343 explicitly mentions *not* supporting an auto retry
construct, I should think not. :)
--
Benji York
Am 11.05.2010, 16:01 Uhr, schrieb Jim Fulton j...@zope.com:
This wouldn't work. You would need to re-execute the suite
for each retry. It's not enough to just keep committing the same
transaction. (There are other details wrong with the code above,
but they are fixable.) Python doesn't
Am 11.05.2010, 17:08 Uhr, schrieb Nitro ni...@dr-code.org:
Am 11.05.2010, 16:01 Uhr, schrieb Jim Fulton j...@zope.com:
This wouldn't work. You would need to re-execute the suite
for each retry. It's not enough to just keep committing the same
transaction. (There are other details wrong with
On 11 May 2010 15:08, Jim Fulton j...@zope.com wrote:
On Tue, May 11, 2010 at 8:38 AM, Benji York be...@zope.com wrote:
On Tue, May 11, 2010 at 7:34 AM, Jim Fulton j...@zope.com wrote:
[...] The best I've been
able to come up with is something like:
t = ZODB.transaction(3)
while
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