API Gateways and backend for frontend

An application based on the microservices architecture will have a user interface that will interact with several web services. Recall that our services have been designed to rule over a business domain, and many operations that users complete span several domains. Because of this, the client application will need to have knowledge of the services and how to interact with them to complete one operation. By extension, we can have several clients in web and mobile applications.

The problem is that we will need to implement too much logic in the client application to facilitate all the service calls, which can lead to a chatty client app. Then, maintenance becomes more painful with each new client that we introduce. The solution here is to consolidate a point of entry to our microservices. This is called an API gateway, and it will sit between the services and the client app.

An API gateway allows us to centralize all our services behind a single...