Onion Architecture & Simple sample Code

Onion Architecture is a clean architecture pattern. A way of structuring your code for a long-life application with low maintenance costs.

Since I had the opportunity to start new projects, I decided to invest my initial time in research about the Onion Architecture. However, I found myself having the following problem: I couldn’t find a simple and clean implementation.

This is just my point of view about the Onion Architecture. I respect all the other implementations and perspectives.

What is the Onion Architecture?

Created in 2008 by Jeffrey Palermo, onion architecture aims to address problems faced with traditional architectures and the common problems like coupling and the separation of the concerns.

This architecture has gone by many names over the years. Hexagonal Architecture, followed by Ports-and-Adapters and now Onion Architecture.

I’ve found that it leads to more maintainable applications since it emphasizes the separation of concerns throughout the system, provides a solution for common problems, like coupling and separation of concerns.

This architecture follows the Dependency Inversion Principle as well as Domain-Driven Design DDD. Data model and business logic at the center, instead of…