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Update state.md (#227) 

Fix imposing statement
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Yaron Schneider 2019-11-03 18:42:51 -08:00 committed by GitHub
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@ -198,8 +198,8 @@ A Dapr-compatible state store shall use the following key scheme:
* *\<Dapr id>-\<Actor type>-\<Actor id>-\<state key>* key format for Actor states. * *\<Dapr id>-\<Actor type>-\<Actor id>-\<state key>* key format for Actor states.
### Concurrency ### Concurrency
Dapr uses Optimized Concurrency Control (OCC) with ETags. Dapr imposes the following requirements on state stores: Dapr uses Optimized Concurrency Control (OCC) with ETags. Dapr makes optional the following requirements on state stores:
* An Dapr-compatible state store shall support optimistic concurrency control using ETags. When an ETag is associated with an *save* or *delete* request, the store shall allow the update only if the attached ETag matches with the latest ETag in the database. * An Dapr-compatible state store may support optimistic concurrency control using ETags. When an ETag is associated with an *save* or *delete* request, the store shall allow the update only if the attached ETag matches with the latest ETag in the database.
* When ETag is missing in the write requests, the state store shall handle the requests in a last-write-wins fashion. This is to allow optimizations for high-throughput write scenarios in which data contingency is low or has no negative effects. * When ETag is missing in the write requests, the state store shall handle the requests in a last-write-wins fashion. This is to allow optimizations for high-throughput write scenarios in which data contingency is low or has no negative effects.
* A store shall **always** return ETags when returning states to callers. * A store shall **always** return ETags when returning states to callers.