Discover Hexagonal Architecture to create web applications with isolated, testable layers. Gain insights into designing clean, maintainable modules and advocating for suitable techniques for your application.

Get Your Hands Dirty on Clean Architecture by Tom Hombergs.png

spring.tar.gz

spring1

spring1-copy

blank

This course will teach you all about creating a web application in the Hexagonal Architecture style. Hexagonal Architecture promotes the separation of concerns by encapsulating logic in different layers of the application. This enables a higher level of isolation, testability, and control over your business specific code. 

You will learn how to design software modules and complete applications in a clean and maintainable manner, while also learning how to advocate for a certain technique given your application and constraints.

By the end of this course, you will have a greater understanding of how to implement software architecture, a key skill for any senior developer.

Hexagonal Software Architecture for Web Applications

# Storytime

I once was part of a project where my team inherited a ten-year-old codebase built by another software shop. The client had decided to replace the development team to make maintenance and development better and less expensive in the future.

As was to be expected, it was not easy to gain an understanding of what the code actually did, and changes we made in one area of the codebase often had side effects in other areas. But we managed by testing exhaustively, adding automated tests, and refactoring a lot. 


This lesson provides some anecdotal evidence to illustrate the importance of developing clean software architecture.

Before We Begin

What's Wrong with Layers?

Inverting Dependencies

Organizing Code

Implementing a Use Case

Implementing a Web Adapter

Implementing a Persistence Adapter

Testing Architecture Elements

Mapping Between Boundaries

Assembling the Application

Enforcing Architecture Boundaries

Taking Shortcuts Consciously

Assessment

Conclusion

Appendix

A Table about Side Effects

Storytime