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

On top of the pyramid are system tests. A system test starts up the whole application and runs requests against its #key# API: Application Programming Interface #key#, verifying that all our layers work in concert. 

## Send money system test

In a system test for the "Send Money" use case, we send an #key# HTTP: Hypertext Transfer Protocol #key# request to the application and validate the response as well as the new balance of the 
account:

On top of the pyramid are system tests. A system test starts up the whole application and runs requests against its #key# API: Application Programming Interface #key#, verifying that all our layers work in concert. 

# Send money system test

In a system test for the "Send Money" use case, we send an #key# HTTP: Hypertext Transfer Protocol #key# request to the application and validate the response as well as the new balance of the 
account:

Learn how to test the main paths of your application with the help of system tests.

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

Testing Main Paths with System Tests

Send money system test