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

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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

A common evolution within a layered architecture is that layers are being skipped. We access the persistence layer directly from the web layer since we're only manipulating a single field of an entity, and for that, we need not bother the domain layer, right?

## Skipping layers

A common evolution within a layered architecture is that layers are being skipped. We access the persistence layer directly from the web layer since we're only manipulating a single field of an entity, and for that, we need not bother the domain layer, right?

# Skipping layers

Learn how layers can cause our software to become hard to test.

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

Grows Hard to Test

Skipping layers