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Windows Azure Queue is a data abstraction handled by Windows Azure Storage.Queues provide a handy way to implement the producer/consumer pattern between
Web Roles and
Worker Roles. The API is designed such that it can guarantee that Queue items will be processed
at least once.
The current guidance is that one should always develop services to be able deal with situations where the same item is retrieved multiple times. In situations where a role crashes, for example, a message can be retrieved multiple times, and also when the visibility timeout is too short.
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