On Apr 1, 2007, at 12:31 AM, Robert Gravina wrote:
On Mar 31, 2007, at 11:41 PM, Robert Gravina wrote:
On Mar 31, 2007, at 11:13 PM, Robert Gravina wrote:
On Mar 31, 2007, at 10:32 PM, Stephan Richter wrote:
On Thursday 29 March 2007 15:14, Robert Gravina wrote:
Is anyone using ZEO to build mutliuser networked applications
outside
of Zope?
Uwe Oestermeier and his team built Bebop. While the server
component uses Zope
3, it uses a full wxPython GUI as client.
http://svn.kmrc.de/
Wow, that looks very impressive. I'll checkout the source and
have a look around to see what I can learn.
Thanks,
Robert
I'm still a little bit unsure about how to update the GUI when
objects are changed.
I noticed a previous thread on a similar topic which suggested to
customise ZODB.DB.invalidate.
http://www.mail-archive.com/zodb-dev@zope.org/msg01969.html
I thought I could check the type of object, and generally that
will be enough for me to decide which parts of the UI need a
refresh. It seems though, that when I change data from one client
other clients, although getting invalidate messages, are still
displaying old data.
I tried subclassing DB, and printing out the object as a test, but
it's always "None" (even when I have a few clients connected). The
code there to get the object from the cache I don't quite
understand, I just copied it from ZODB.DB.invalidate and hoped for
the best :)
class UpdatedDB(DB):
def invalidate(self, tid, oids, connection=None, version=''):
DB.invalidate(self, tid, oids, connection, version)
for oid in oids.keys():
h = hash(oid) % 131
o = self._miv_cache.get(h, None)
print o
Is there anything else I need to do/doing wrong?
Woohoo! I realised Connection.sync() does exactly what I need, but
this still doesn't work as expected.
class UpdatedDB(DB):
def invalidate(self, tid, oids, connection=None, version=''):
DB.invalidate(self, tid, oids, connection, version)
if connection is not None:
connection.sync()
OK, I realised the connection passed in is the one that committed the
transaction, but we want to refresh the connection for the current
client, so I've changed the code to do that (but still no luck).
(here ApplicationPresenter is a singleton that holds a reference to
the connection (well, reachable from it anyway)).
class UpdatedDB(DB):
def invalidate(self, tid, oids, connection=None, version=''):
DB.invalidate(self, tid, oids, connection, version)
appmodel = ApplicationPresenter.getInstance().model
if connection is not appmodel.connection:
appmodel.connection.sync()
Am I going about this the right way?
Thanks,
Robert
Robert
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_______________________________________________
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http://www.zope.org/Wikis/ZODB/
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http://mail.zope.org/mailman/listinfo/zodb-dev
_______________________________________________
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
