Re: [ZODB-Dev] ConflictErrors won't clear
Christian Robottom Reis wrote: On Fri, Apr 15, 2005 at 12:57:07PM +0100, Chris Withers wrote: Okay, where in the above should I be calling sync()? Where do I get sync from? get_transaction() doesn't have a synch attribute.. On the Connection, of course wink And how do I get hold of the connection? Is that the official way? Does this change if I have several storages mounted with the stuff that ships with Zope 2.7? cheers, Chris -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] ConflictErrors won't clear
On 4/15/05, Chris Withers [EMAIL PROTECTED] wrote: Jeremy Hylton wrote: It's mentioned in the documentation -- see section 3.4 ZEO programming notes -- and it's been discussed on this list many, many times. Where are these notes? In the ZODB ZEO programming guide that's packaged with ZODB and available in the Wiki. Perhaps you've read it before? It sounds like the simplest approach for your application is to do like Zope and start a separate thread that runs an asyncore mainloop. Then your application threads will see updates when the commit and abort transactions, just like the would in Zope. I'd really prefer not to do that unless absolutely necessary: http://mail.zope.org/pipermail/zodb-dev/2004-June/007554.html It sounds like the answer here it so avoid fork, rather than asyncore. If you don't run an asyncore mainloop, you'll be responsible for manually sync-ing all the storages/connections that asyncore would handle automatically. Jeremy ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
[ZODB-Dev] ConflictErrors won't clear
Hi there, I have a non-zope zeo client that pumps data into a storage server for later consumption by a zope zeo client. Everything is Zope 2.7.5. The non-zope client has logic that looks roughly like: for work in queue: try: get_transaction().begin() # do work, change zodb objects, etc get_transaction().commit() except ConflictError: get_transaction().abort() queue.append(work) except: get_transaction().abort() Does anything look amiss there? The reason I ask is that it works fine, unless someone changes something via the zope zeo client resulting in a conflict error on the non-zope zeo client. When that happens, the work where the conflict occurs gets put back in the queue, but seems to conflict again next time round, even though the change on the zope zeo client is long since committed and passed. The work effectively gets stuck in an endless loop of being retried and then conflicterror'ing :-( Any ideas why that could be? cheers, Chris -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
Re: [ZODB-Dev] ConflictErrors won't clear
I had a problem like that, and I had to explicitely sync() the connection before begin(), I think. Florent Chris Withers [EMAIL PROTECTED] wrote: Hi there, I have a non-zope zeo client that pumps data into a storage server for later consumption by a zope zeo client. Everything is Zope 2.7.5. The non-zope client has logic that looks roughly like: for work in queue: try: get_transaction().begin() # do work, change zodb objects, etc get_transaction().commit() except ConflictError: get_transaction().abort() queue.append(work) except: get_transaction().abort() Does anything look amiss there? The reason I ask is that it works fine, unless someone changes something via the zope zeo client resulting in a conflict error on the non-zope zeo client. When that happens, the work where the conflict occurs gets put back in the queue, but seems to conflict again next time round, even though the change on the zope zeo client is long since committed and passed. The work effectively gets stuck in an endless loop of being retried and then conflicterror'ing :-( Any ideas why that could be? cheers, Chris -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev -- Florent Guillaume, Nuxeo (Paris, France) CTO, Director of RD +33 1 40 33 71 59 http://nuxeo.com [EMAIL PROTECTED] ___ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
