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4.4. Queues

Queues are named entities within a Virtual Host that hold/buffer messages for delivery to consumer applications.

Different types of Queue have different delivery semantics. The following Queues types are currently supported:

  • Standard: a simple First-In-First-Out (FIFO) queue

  • Priority: delivery order depends on the priority of each message

  • Sorted: delivery order depends on the value of the sorting key property in each message

  • Last Value Queue: also known as an LVQ, retains only the last (newest) message received with a given LVQ key value.

Queue configuration details are covered in Chapter 9, Queues.