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 .