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

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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.

# 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.

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