In rabbitmq, is it possible to subscribe to a publication if there are few messages in the queue?

Question

RabbitMQ

In rabbitmq, is it possible to subscribe to a publication if there are few messages in the queue?
Relatively speaking, the consume method is a subscription from the outgoing side, is there the same from the incoming ones, you just want some kind of single flow control point, and not write crutches yourself.

Answer 1

If the rabbitmq user has rights on this virtual host where the queue is located, he can send messages there if the queue is not filled to the maximum, and that's all that concerns queues.
Given your real problem, you need to pay attention to the exchanges (a set of queues), and publish through them, then Rabbitmq itself will load balance messages between all the queues that are registered in a particular exchange.
(in the degenerate case, this could be a single queue, but rabbitmq came up with this because of the need to support clustering)
https://www.rabbitmq.com/tutorials/tutorial-three-...