Explore core concepts of Domain Driven Design, its pros and cons, modeling techniques, and hexagonal architecture to transform complex business requirements into effective software solutions.

In this course, you are going to learn the most important concepts of Domain Driven Design or DDD for short. You will see both benefits and drawbacks, techniques to model, how DDD can be implemented using hexagonal architecture and many other amazing concepts.

By the end of this course, you will be able to take complex business requirements and processes and turn them into meaningful software.

Domain Driven Design Made Easy

To finish off our work with the example of a restaurant, let us implement the adapter layer on top of the port layer.


# Example definition
We will continue with the example that was defined in the [Domain Layer lesson](https://www.educative.io/pageeditor/10370001/4616975235416064/6471623718207488#Example-definition) and finish the implementation. The last layer is the adapter layer. This layer is in charge of communication with the outside world, for example, communication with database connections, HTTP, and so on.


## Model definition
The following diagram depicts the adapter layer, which defines six artifacts. Additionally, this layer makes use of the port layer. Due to its large size, this model is divided into two parts. Part one shows the domain, use case, and port layers, whereas part two shows the interaction between the port and abstract layers. 


Learn more about the adapter layer, through the implementation of an example.

Introduction

Mapping Domain to Model

Domain Activities

Domain Objects

Domain Abstractions

Hexagonal Architecture

Conclusion

Adapter Layer

Example definition