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

If we have an `Account` domain entity and an incoming port `SendMoneyUseCase`, we might be tempted to use the entity as the input and/or output model of the incoming port, as the figure below shows:

## Using domain entities as input model

If we have an `Account` domain entity and an incoming port `SendMoneyUseCase`, we might be tempted to use the entity as the input and/or output model of the incoming port, as the figure below shows:

# Using domain entities as input model

Learn how to use domain entities as an input or output model in your projects.

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

Using Domain Entities as an Input or Output Model

Using domain entities as input model