Redis Publisher/Subscriber Model

What is a message queue?

A message queue is a type of temporary storage for messages. The sender, also known as publisher, sends messages to the queue. The messages remain in the queue until a receiver also known as a subscriber, is ready to read the messages. The main use case for a message queue is when there are some larger jobs that need to be processed. The sender sends the jobs to a queue instead of directly sending it to the receiver. The receiver picks each job, one by one, and processes it.

Let’s say we are booking movie tickets on a website. There are a few things that should be done immediately, like selecting the seats, payment, etc. But a few things, like sending tickets via email, may take time and are not required to be done immediately. These tasks that time and ...