21 Asynchronous communication with a message queue
This is the final full chapter of the book, and it introduces a new way for the components of a system to communicate: sending and receiving messages using a queue. Message queues have been around for a very long time--they’re a way of decoupling components so instead of making a direct connection to communicate with each other, they send messages to the queue. The queue can deliver messages to one or many recipients, and that adds a lot of flexibility to your architecture.
In this chapter we’ll focus on two scenarios that are enabled when you add a message queue to your application: improving system performance and scalability, and adding new features with zero downtime. We’ll use two modern ...
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