[ZODB-Dev] ZEO and commits

[Antonio Beamud Montero]

El lun, 27-10-2003 a las 17:17, Christian Robottom Reis escribió:
> On Mon, Oct 27, 2003 at 12:33:38PM +0100, Antonio Beamud Montero wrote:
> > I need a sync to update my local copy of the object, because making a
> > commit not produce any Conflict situation... My experiencie is the next
> >   process A <----------------- ZEO -----------------> process B
> > ------------                                          ------------
> >                                                    create Object X
> >     ...                                            make changes in X
> >     sync()                                              ....
> 
> This sync() will do nothing unless process B has commited first. Do you
> have a commit() missing after create Object X there?

When I make changes in X in process B I have make several commits.

> >    my X copy						.....
> >     commit()
> >     .....             nothing conflicts                 .....
> >                                                      commit X changes
> >                       nothing conflicts
> >   
> > Is this normal? When B tries to make commit X changes wouldn't raise a
> > conflict? I'm a bit confused... Seems like the commit is only propagated
> 
> I can't see how B's final commit doesn't conflict with A's final
> conflict. It raises a ConflictError, most certainly, unless you initiate
> your transaction *after* A has committed.
> 
> You may be doing something slightly different than what you say you're
> doing <wink>.

I will review all my code again... Thanks.


> > in the local cache copy of the object... I need to make several sync
> > call's in the B process to produce the conflict...?
> 
> No, you don't -- the ZODB will raise conflicts for you.
> 
> Ah, for an example _p_resolveConflict, see the BTrees Length class --
> it's very simple, and easy to figure out.
> 
> Take care,
> --
> Christian Robottom Reis | http://async.com.br/~kiko/ | [+55 16] 261 2331
-- 
Antonio Beamud Montero <antonio.beamud at linkend.com>