Modular Monolith Architecture: The Missing Guide to Public APIs

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Learn how to transform a monolithic application into a well-structured modular system with clean public APIs. This guide covers essential concepts of modularity, coupling, and architecture testing to help you build maintainable applications. From basic principles to practical implementation, discover how to create explicit contracts and move from direct data access to professional public APIs.

Internal vs. Public APIs in Modular Monoliths

https://www.milanjovanovic.tech/blog/internal-vs-public-apis-in-modular-monoliths

What Is a Modular Monolith?

https://www.milanjovanovic.tech/blog/what-is-a-modular-monolith

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Chapters

0:00 Modular Monolith intro

1:26 Modularity and Coupling

3:16 Improving the design

5:07 Defining a Public Contract

6:43 Enforcing Modularity - Architecture tests

9:14 Exposing a Public API - Extract interface

10:32 Make Coupling explicit and controlled

11:03 Testing the improved implementation

12:32 Moving from direct data access to Public API