Project – BFF

Here, we’re pausing our discussion of microservices concepts and relevant patterns to work through a practical project, demonstrating how the BFF pattern works in practice. This is a long chapter, so feel free to take a break before diving into this project.

This project leverages the BFF design pattern to reduce the complexity of using the low-level API of the REPR project we created in Chapter 18, Request-EndPoint-Response (REPR). The BFF endpoints act as the several types of gateway we have explored.

This design makes two layers of APIs, so let’s start here.

Layering APIs

From a high-level architecture perspective, we can leverage multiple layers of APIs to group different levels of operation granularity. For example, in this case, we have two layers:

• Low-level APIs that offer atomic foundational operations
• High-level APIs that offer domain-specific functionalities

Here’s a diagram that...