| Re: teneo: client/server scenario [message #420998] |
Mon, 21 July 2008 09:29 |
 Martin Taal
Messages: 5468
Registered: July 2009 |
Senior Member |
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Hi Dietmar,
Yes setting the persistenceOptions.always_version to false should get rid of the version attribute.
This should result in that the record is always updated.
With a version attribute it is not possible to prevent this exception.
Note that the cdo project provides a way for notifying distributed clients when the state on the
server/database changes.
btw, I cross-posted to the emf newsgroup because support for Teneo is given there since the 1.0.0
release.
gr. Martin
Dietmar Holzer wrote:
> Hi,
>
> I'm using teneo in a client/server scenario.
> I found hints on the elver.org site to explicitly model id and version
> attributes and this works pretty well. Anyway, there's one issue which
> is still troubling me: The version field of clients and database is
> getting out of sync in my application. Hibernate is incrementing the
> version each time it does an update on the object (or better, it does
> that on every update on the row in the database table). My clients do
> not get notified about this and they keep an old version value, so
> a further update on the same object would not work.
>
> As I'm working with large emf models I do not want to read out objects
> and compare version values before updating.
>
> So my question are:
> - Would a client/server scenario using teneo work without using the
> version attribute at all (my attempt would be setting
> PersistenceOptions.ALWAYS_VERSION to false and leave emf without any
> explicitely modelled version attributes)?
> - Is there a way to teach teneo/hibernate to do not care about the
> version values and just do an update on the objects if the id is matching?
>
> I'm using teneo 1.0.0, emf 2.4 and hibernate 3.2.1.
>
> Regards,
> Dietmar
--
With Regards, Martin Taal
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