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 [previous chapter](https://www.educative.io/courses/hexagonal-architecture-web-apps/promotes-database-driven-design), we discussed the potential problems that arise when using a layered architecture. This chapter will discuss an alternative approach. We'll start by discussing two of the SOLID principles and then apply them to create a "Clean" or "Hexagonal" architecture that addresses the problems of a layered architecture.


Learn about the single responsibility principle and how it can help you develop better 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

The Single Responsibility Principle