Message queues are named entities that store messages in memory or on the disk and deliver them in sequence to connected consumer applications. The queues are hosted by the Virtual Hosts. Any number of queues can be created on Virtual Host. The following types of Queues are currently supported: Simple is a simple FIFO queue Priority where messages delivery order depends from the message priority Sorted where messages delivery order depends from the message sorting key value Last Value Queue automatically discards older message when a newer message arrives with the same key value Queue configuration details are covered in .