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


     [ http://tools.oasis-open.org/issues/browse/ODATA-43?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ralf Handl updated ODATA-43:
----------------------------

       Proposal: 
Remove ConcurrencyMode facet attribute.

Define a new Behavior vocabulary with an annotation that expresses this meaning:

<Term Name="OptimisticConcurrencyControl" Type="Capabilites.OptimisticConcurrencyControlType" AppliesTo="EntitySet" />
<ComplexType Name="OptimisticConcurrencyControlType" Nullable="true">
  <Documentation>
    <Summary>If present, the annotated entity set uses optimistic concurrency control</Summary>
    <LongDescription>If the ETag is computed from properties of entities of this set, these are listed in ETagDependsOn</LongDescription>
  </Documentation>
  <Property Name="ETagDependsOn" Type="Collection(Edm.Property" />
</ComplexType>

Accepted: https://www.oasis-open.org/committees/download.php/48411/odata-meeting-27_on-20130228-minutes.html#odata-43

Addendum: remove references to ConcurrencyMode from Part 1: Protocol, refer to Behavior vocabulary in ETag section

  was:
Remove ConcurrencyMode facet attribute.

Define a new Behavior vocabulary with an annotation that expresses this meaning:

<Term Name="OptimisticConcurrencyControl" Type="Capabilites.OptimisticConcurrencyControlType" AppliesTo="EntitySet" />
<ComplexType Name="OptimisticConcurrencyControlType" Nullable="true">
  <Documentation>
    <Summary>If present, the annotated entity set uses optimistic concurrency control</Summary>
    <LongDescription>If the ETag is computed from properties of entities of this set, these are listed in ETagDependsOn</LongDescription>
  </Documentation>
  <Property Name="ETagDependsOn" Type="Collection(Edm.Property" />
</ComplexType>

Accepted: https://www.oasis-open.org/committees/download.php/48411/odata-meeting-27_on-20130228-minutes.html#odata-43

    Component/s: OData Protocol 

> No indicator for optimistic concurrency control on EntityType or EntitySet level
> --------------------------------------------------------------------------------
>
>                 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, OData Protocol , Vocabularies
>    Affects Versions: V4.0_WD01
>         Environment: [Proposed]
>            Reporter: Ralf Handl
>             Fix For: V4.0_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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