I still think it's already possible to do what you want.
Please give me a concrete example of what you're trying to do, and
I'll help you see how to do it.
On Tue, Nov 25, 2008 at 5:21 AM, BL <bleu..mx.de> wrote:
> On Mon, 24 Nov 2008 18:23:51 -0500 "Mike Kienenberger" <mkienen..mail.com> wrote:
>> Can't you do this already?
>> Each field can be set to be optimistically-locked or unlocked individually.
>> It might require manually changing your map entity definition in the
>> run-time if this behavior isn't constant, but that doesn't seem like a
>> big deal.
> Not only at runtime, it changes within the active sync process.
> Just to be sure: DataNodeSyncQualifierDescriptor.reset seems to call attribute.isUsedForLocking to detect attributes it has to add to the qualifier (I think you wrote this part)?.
> Is it possible to influence this process from outside - without knowledge of the ObjectDiff - while the query appending happens? This would be great, but I don't see it. Do you have a hint for me?
> BTW: What's the best practice to implement this without getting problems in the next Cayenne release?
> Thanks for your help.
>> On Fri, Nov 21, 2008 at 9:54 AM, BL <bleu..mx.de> wrote:
>>> the idea is to have a table related setting to request optimistic
>>> locking for the changed properties only. This would allow shared write
>>> access for clients using a distinct set of fields.
>>> Without global support a customized UpdateBatchQueryBuilder could
>>> do it probably locally, only access to the snapshot (getChangesByObjectId)
>>> of the current entity would be required.
>>> Is there any interest in such a feature?
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