Application Layer

Application Service

• Defines the use case for the system

• Receives request from infra layer and coordinate the use of objects from domain layer and other layer

Note

• Application service operations can be represented by method (inside object) or function, using function is great if you're not planning to make the service stateful

Data Transfer Object (DTO)

• Used to transfer data between application layer and infrastructure layer

• Should only contain data

• Should not contain behaviour

• Can be mutable or immutable, make it mutable only if it needs to be modified on transfer