Kudos to whomever turned the "transaction" package's transaction manager
into a context manager and was thoughtful enough to provide the
"attempts" method (which returns a separate context manager, wrapping
the txn context manager, and retries some number of configurable times).
This makes writing code that integrates with a web system that commits
or aborts as easy as:
import transaction
for attempt in transaction.attempts(attempts):
with attempt as t:
response = handler(request)
if t.isDoomed():
t.abort()
if commit_veto is not None:
veto = commit_veto(request, response)
veto and t.abort()
return response
Very nice.
- C
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