What is Factory in DDD?
A Factory is an object that has the sole responsibility to create other objects. Factories are definitely not unique to Domain Driven Design, but they do hold an important role within a Domain Driven Design project.
What is application service in DDD?
It takes care of invoking the correct domain models and services, it mediates between Domain and Infrastructure and it shields any Domain model from the outside. Basically, in a DDD app, only the Application Service interacts directly with the Domain model.
Where do you put DTO?
Depending on their form, a good place for them is either the Application Layer or the Presentation Layer. If the DTOs are only for presentation purposes, then the Presentation Layer is a good choice. If they are part of an API, be it for input or output, that is an Application Layer concern.
What do you need to know about DDD microservices?
Design a DDD-oriented microservice. Domain-driven design (DDD) advocates modeling based on the reality of business as relevant to your use cases. In the context of building applications, DDD talks about problems as domains.
How does DDD help you understand the complexity in the domain?
DDD patterns help you understand the complexity in the domain. For the domain model for each Bounded Context, you identify and define the entities, value objects, and aggregates that model your domain. You build and refine a domain model that is contained within a boundary that defines your context.
What are the dependencies between the DDD layers?
Dependencies between layers in DDD Dependencies in a DDD Service, the Application layer depends on Domain and Infrastructure, and Infrastructure depends on Domain, but Domain doesn’t depend on any layer. This layer design should be independent for each microservice.
What do you need to know about DDD building blocks?
First things first: you must know the DDD building blocks below: Fasten your seatbelts!. We’re going through the details of those blocks now. 1. Entities An entity is a plain object that has an identity (ID) and is potentially mutable.