odata message

Subject: [OASIS Issue Tracker] Created: (ODATA-43) No indicator for optimistic concurrency control on EntityType or EntitySet level

From: OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>
To: odata@lists.oasis-open.org
Date: Fri, 24 Aug 2012 09:09:32 -0400 (EDT)

No indicator for optimistic concurrency control on EntityType or EntitySet level
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                 Key: ODATA-43
                 URL: http://tools.oasis-open.org/issues/browse/ODATA-43
             Project: OASIS Open Data Protocol (OData) TC
          Issue Type: Improvement
          Components: OData CSDL v1.0
    Affects Versions: WD01
            Reporter: Ralf Handl
             Fix For: WD01


Currently the only way for a server to indicate to its clients that entities of a given type use optimistic concurrency control, and that the client thus has to watch out for ETags in responses and provide appropriate If-Modified headers in requests is to use the ConcurrencyMode="Fixed" facet on simple properties of an entity type.

If the server 
 - does not wish to disclose which properties it uses for optimistic concurrency control, or
 - does not include the concurrency control properties in the entity type, or
 - includes the properties as part of a complex type
it has no means to advertise the presence of optimistic concurrency control to the client.

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