![Introduction to Domain Driven Design ,[object Object],[object Object]](https://image.slidesharecdn.com/ddd-100430010449-phpapp02/85/Domain-Driven-Design-1-320.jpg)
![Sample use case – enter activity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Recommended
Recommended
More Related Content
What's hot
What's hot (20)
Similar to Domain Driven Design
Similar to Domain Driven Design (20)
More from Ürgo Ringo
Recently uploaded
Recently uploaded (20)
Domain Driven Design
- 3. “Domain Model” - non-DDD way UML class diagram
- 5. Submit form – non-DDD way UML sequence diagram
- 11. Domain Model - DDD way UML class diagram
- 12. Show form - DDD way UML sequence diagram
- 13. Submit form - DDD way UML sequence diagram
Editor's Notes
- Introduction Knowledge of DDD?
- What is small system? Need to change design if system grows
- Entity – objects with a distinct identity. Core of domain model. ValueObject – objects that are primarily defined by the value of their attributes. Often immutable. Two instances whose attributes have the same values can be used interchangeably. Service – implement the workflow of the application. Fulfill a use case. Generally include behaviors that cannot be assigned to a single entity and consist of methods that act on multiple objects. Can be in domain, infrastructure or application level.
- Facade – hides complexities of accessing domain model. Like application level services. Define use cases. Contain no business logic themselves. Specification – need to check that only suitable objects are used for a certain role. Keep business rules inside the domain model not leak it out into application layer. If there is large collection it can be same as Query object. Repository – manage collections of entities and define methods for finding and deleting entities. So that clients don't have to care where entities are coming from. Other == DAO but in can be special cases like query some stuff first from some service and then from db. Factory – for creating NEW complex entities. Not like Repositories.