C#•3y ago•

14 replies

Is Okay to Extend the Domain Services by Application Services while implementing DDD

Hi friends,
I'm implementing a project using various advanced concepts, one of these concepts is

DDD (Domain Driven Design)

DDD (Domain Driven Design)

.
I have these layers

Domain

Domain

Infrastructure

Infrastructure

and

Application

Application

layers.
In the

Domain

Domain

layer I have some

Domain Services

Domain Services

,
In the

Infrastructure

Infrastructure

as everyone knows I implemented the

Repositories

Repositories

In the

Application

Application

layer I have

Application Services

Application Services

, but here the confusing point for me, beacuse I let the

Application Services

Application Services

to extend the

Domain Services

Domain Services

( by the inheritance ).

Example:
Domain Service:

public class ExpenseService : IExpenseService
{
  // Some definition goes here
}

public class ExpenseService : IExpenseService
{
  // Some definition goes here
}

Application Service:

public class AppliationExpenseService : ExpenseService
{
  // Some definition goes here
}

public class AppliationExpenseService : ExpenseService
{
  // Some definition goes here
}

Additional info:
In the

Application

Application

layer I have imlemented the

CQRS

CQRS

( Commands and Queries )

Question:
I'm confusing about letting the implementation as I showed you, or do a better approach.
I asked

Github Copilot

Github Copilot

and it told me that the

Application layer

Application layer

should not directly depend on

Repositories

Repositories

instead it should depend on

Domain Services

Domain Services

and the

Domain Services

Domain Services

should depend on

Repositories

Repositories

.

Please share with me your experience about this topic.

Massive thanks in advance <3

Is Okay to Extend the Domain Services by Application Services while implementing DDD

Hi friends,
I'm implementing a project using various advanced concepts, one of these concepts is

DDD (Domain Driven Design)

DDD (Domain Driven Design)

.
I have these layers

Domain

Domain

Infrastructure

Infrastructure

and

Application

Application

layers.
In the

Domain

Domain

layer I have some

Domain Services

Domain Services

,
In the

Infrastructure

Infrastructure

as everyone knows I implemented the

Repositories

Repositories

In the

Application

Application

layer I have

Application Services

Application Services

, but here the confusing point for me, beacuse I let the

Application Services

Application Services

to extend the

Domain Services

Domain Services

( by the inheritance ).

Example:
Domain Service:

public class ExpenseService : IExpenseService
{
  // Some definition goes here
}

public class ExpenseService : IExpenseService
{
  // Some definition goes here
}

Application Service:

public class AppliationExpenseService : ExpenseService
{
  // Some definition goes here
}

public class AppliationExpenseService : ExpenseService
{
  // Some definition goes here
}

Additional info:
In the

Application

Application

layer I have imlemented the

CQRS

CQRS

( Commands and Queries )

Question:
I'm confusing about letting the implementation as I showed you, or do a better approach.
I asked

Github Copilot

Github Copilot

and it told me that the

Application layer

Application layer

should not directly depend on

Repositories

Repositories

instead it should depend on

Domain Services

Domain Services

and the

Domain Services

Domain Services

should depend on

Repositories

Repositories

.

Please share with me your experience about this topic.

Massive thanks in advance <3

Is Okay to Extend the Domain Services by Application Services while implementing DDD

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