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.

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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

In the chapter ["Implementing a Use Case"](https://www.educative.io/courses/hexagonal-architecture-web-apps/implementing-the-domain-model), it was argued that different use cases should have a different input and output model, meaning that the types of the input parameters and the types of the return values should be different. 

The figure below shows an example where two use cases share the same input model:

## Sharing models

In the chapter ["Implementing a Use Case"](https://www.educative.io/courses/hexagonal-architecture-web-apps/implementing-the-domain-model), it was argued that different use cases should have a different input and output model, meaning that the types of the input parameters and the types of the return values should be different. 

The figure below shows an example where two use cases share the same input model:

# Sharing models

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

Sharing Models between Use Cases

Sharing models