Why use RabbitMQ?

Question

RabbitMQ

Hello!
I read an article on Habré about how they made a chat for a bank https://habrahabr.ru/company/redmadrobot/blog/308398/ among other things, I saw that they used RabbitMQ and I can’t understand why? In my humble view, RabbitMQ is a task queue for long operations and that somewhere there is a worker that receives tasks and begins its long work. But chat is instant messages, and what kind of long-term operations can there be? Can you give an example of how RabbitMQ can be used in chat?

Answer 1

when you need to set a long task(s) without blocking the response to the client, based on his request
, push him on completion, if necessary,
imagine what will happen if he synchronously waits for a response about the execution