Hexagonal Architecture with DDD

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Hexagonal Architecture, also known as Ports and Adapters Architecture, seeks to separate business logic from implementation details by dividing the application into inner and outer layers.

Inner Layers: These represent the core of the application where the business logic resides. Models, rules and processes that are specific to the application are defined here.
External Layers: These are the adapters that communicate with the outside world, such as the user interface, databases or external services. These adapters are responsible for converting external requests into a format that can be understood by the application core and vice versa.
The main goal is to minimize external dependencies on the application core, which facilitates changes and evolutions in the system without affecting its main functionality. Furthermore, by separating these parts, each can be modified and tested independently, which improves the maintainability and scalability of the system. In short, Hexagonal Architecture promotes a flexible and modular design that makes it easy to adapt to changes and the evolution of the system over time. Therefore, the combination of DDD and Hexagonal Architecture can be very beneficial for software development for several reasons:

Clarity and Maintainability: DDD provides a clear and expressive viber data model of the business domain, while Hexagonal Architecture clearly separates business logic concerns from implementation details. This makes code more understandable and maintainable over time.
Flexibility and Adaptability: Hexagonal Architecture allows the system to be easily adaptable to changes in requirements or the technological environment, since the outer layers can be changed without affecting the core of the application. DDD, on the other hand, facilitates the identification and management of the complexity of the business domain, allowing greater flexibility and adaptability in software design.
Testing and Refactoring: The separation of business logic from implementation details in Hexagonal Architecture facilitates automated testing and code refactoring. This combines well with DDD design principles, which encourage iteration and continuous improvement of the domain model.
Hexagonal Architecture
In conclusion, the combination of Domain-Driven Design and Hexagonal Architecture can help create more robust, flexible, and maintainable software systems by focusing on understanding the business domain and separating business logic concerns from implementation details.