The simplest queue mode, with only one message producer, one message consumer, and one queue, is also known as point-to-point mode or one-to-one mode.

Architecture Diagram

One-to-One Mode Explanation: P represents the producer, C represents the consumer, and the red color represents the queue.

Use Cases

This mode is suitable for relatively simple one-to-one message communication scenarios that do not require concurrent consumption, such as: simple asynchronous sending of SMS, emails, or push notifications.

Note: In the simple one-to-one queue mode, the message order strictly follows the first-in-first-out principle. Since there is only one queue and one consumer, messages can only be consumed one by one, ensuring the strict consistency of message order.