Kapil Thangavelu wrote:
> ZOPE_HOME/lib/python/Shared/DC/ZRDB/TM.py
>
> Glancing over the Transaction TM mixin class... i noticed a line
> commit=tpc_abort=tpc_begin
>
> i can understand tpc_begin=commit, but the abort seems strange.
> if an abort happens in the two phase commit the equality doesn't
> make sense to me.
>
> whats going on here? Is this meant to be overidden?
Yes. Override the methods that you need to. The rest are given a
no-operation default implementation.
The class more or less defines an interface.
def tpc_begin(self, *ignored): pass
commit=tpc_abort=tpc_begin
The assignment you see is just a short-hand way of saying that commit,
tpc_abort and tpc_begin have the same method signature and the same
implementation
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net
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