Understanding the pattern

We know the simplicity and practicality of REST (Representational State Transfer), mainly because this knowledge is already very well-established in the market. The number of tools and frameworks for the REST layer also help with its popularity.

REST calls have a synchronous character, and synchronous calls are blocked due to the request/response model of the technology. This type of call is often necessary for the business of the application, although it is not the most indicated. This shows us there is some level of coupling between the microservices of the application.

A purist microservice must be fully capable of performing the task for which it has been assigned without the need for communication with another microservice. Another feature of a puristic microservice is that it performs a task without the need to return a response by simply receiving the request and doing what needs to be done. In this sense, the asynchronous messaging design pattern is a model...