Just starting with Domain Driven Design and I've learned that you should keep your model in a valid state and when creating a new instance of a class it's recomended to put all required attributes ...

Not sure what happened to Bold/Eco during the Borland/Codegear/Embarcadero transition but I sure miss it in the newer versions of Delphi. Anyone know of a framework that comes close? If not, maybe...

I've read countless posts on differences between Entities and Value objects and while I do think that at least conceptually I understand how the two differ, it appears that in some of these posts a...

I don't get why value objects in DDD should be immutable, nor do I see how this is easily done. (I'm focusing on C# and Entity Framework, if that matters.) For example, let's consider the classic ...

I am working on a program in golang, which I am sructuring based on Hexagonal Architecture. I think I have my head wrapped mostly around the idea, but there is something I just can't figure out. Th...

I've read Eric Evan's book and am reading Vaughn Vernon's book now. I'm in the second chapter where he talks about subdomains and bounded context and am thoroughly confused now. From what I was ab...

I am currently working on a project where I have a BankAccount entity for some other entity. Each bank account is a reference to a bank entity, an account number, and optionally an IBAN. Now since ...

I have been reading about using Command objects to represent use cases that our domain exposes, and Command Handler objects to process those commands. For example: RegisterUserCommand RegisterUs...

I'm creating an application facade in front of my domain model and using dto's for the exchanges between the consumer and the facade. In order to avoid having to fully qualify my namespaces where ...

I've got a simple document management system I'm putting together, I'm trying to follow solid DDD principals and things have been coming together. One area I've been questioning is what the cleanes...

As I understand it, one of the key rules of Hexagonal Architecture is how the Domain Layer is isolated from everything except the Application Layer which works with it (the Domain Layer has no depe...

Eric in his book touches the subject of Modules very little. He also does not talk about the relation of the structure of modules to bounded contexts with examples. Do Bounded Contexts contain modu...

Please what is the main difference between entities and aggregate roots in domain driven design. For example in entity framework, what is the use of aggregates if I can ensure data integrity entiti...

In the Evan's DDD book he speaks of segregating concepts in the domain with "modules". The term "module" can be translated to a number of different things in software development, both conceptual a...

What is the difference between CQRS (Command Query Responsibility Segregation) and Event Sourcing? I believe Event Sourcing is a type of CQRS. What distinguishes each, and what makes Event Sourcin...

Our team is starting a new project following Domain Driven Design (DDD). At the high level, we have an API on the top of our domain which enables a client to perform operations on the domain. One o...

I would like to know how can a domain event be implemented (in DDD) if it is not a natural result of an aggregate's state change. I will borrow the example of this post. So lets say that we need an...

In Domain-Driven Design, the domain model should be completely unbeknownst of any data persistent specifics. Let's say that an Employee belongs to a Department. The domain entities could look lik...

I am confused about where to handle domain events in an application that is based on the hexagonal architecture. I am talking about the bounded-context-internal domain events, and not about inter-c...

In our Spring Boot 3 (Kotlin) project, we apply domain-driven design and want to avoid primitive obsession in entities and repositories (especially IDs, which often are of type GUID and can easily ...

I've been trying to use a value object as a unique id in entity framework core. I've gotten to the point where it is saving to the database correctly, but EF is not querying the database correctly ...

Our team decided to use Domain Driven Design architecture for our project. Now the discussion is going on for, "can we use ASP.NET Identity in DDD?". Is there any disadvantages on using ASP.NET i...

In my business logic I have to deal with a lot of entity IDs, all of them of type String, which can cause confusion especially when you pass a couple of them as method parameters. So I thought abou...

Given I have two microservices: Service A and Service B. Service A owns full customer data and Service B requires a small subset of this data (which it gets from Service A through some bulk load sa...

or to create a domain layer that is consisted of domain models and talk to JPA entities for database accessing? What are the pros and cons for both approaches ? Thanks!