To use this feature, pass an empty string as the queue nameĪrgument: The same generated name may be obtained by subsequent In AMQP 0-9-1, the broker can generate a unique queue name on behalf ofĪn app. Violates this rule will result in a channel-level exception Attempts to declare a queue with a name that Queue names starting with "amq." are reserved for internal Queue names may be up to 255 bytes of UTF-8 characters. Queues have names so that applications can reference them.Īpplications may pick queue names or ask the broker to generate a nameįor them. Optional Queue Arguments ("x-arguments")įor topics related to consumers, see the Consumers guide.Īnd streams also have dedicated guides.Runtime Resource usage by queue replicas.Queue Durability and how it relates to message persistence.The information about RabbitMQ queues covered in this topic includes: Streams provide different features from queues. Streams is an alternative messaging data structure available in RabbitMQ. However, it is still important to understand the role queues playīecause many features still operate at the queue level, even for those protocols. Some protocols (for example: STOMP and MQTT) are based around the idea of topics.įor these protocols, queues act as a data accumulation buffer for consumers. This information primarily covers queues in the context of the AMQP 0-9-1 protocol, however, much of the content is applicable to other supported protocols. The information in this topic includes an overview of queues in RabbitMQ and also links out to other topics so you can learn more about using queues in RabbitMQ. Some RabbitMQ queue features such as priorities and requeueing by consumers can affect the ordering as observed by consumers. Many features in a messaging system are related to queues. Many messaging protocols and tools assume that publishers and consumers communicate using a queue-like storage mechanism. Queues play a major role in the messaging technology space. To define a queue in generic terms, it is a sequential data structure with two primary operations: an item can be enqueued (added) at the tail and dequeued (consumed) from the head. Messages are enqueued and dequeued (delivered to consumers) in a ( FIFO ("first in, first out") manner. A queue in RabbitMQ is an ordered collection of messages.
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