What is Domain Driven Design?

Question

Can somebody please explain (in succinct terms) what exactly is domain driven design? I see the term quite a lot but really don\'t understand what it is or what it looks like. H

Answer 1

As in TDD & BDD you/ team focus the most on test and behavior of the system than code implementation.

Similar way when system analyst, product owner, development team and ofcourse the code - entities/ classes, variables, functions, user interfaces processes communicate using the same language, its called Domain Driven Design

DDD is a thought process. When modeling a design of software you need to keep business domain/process in the center of attention rather than data structures, data flows, technology, internal and external dependencies.

There are many approaches to model systerm using DDD

• event sourcing (using events as a single source of truth)
• relational databases
• graph databases
• using functional languages

Domain object:

In very naive words, an object which

• has name based on business process/flow
• has complete control on its internal state i.e exposes methods to manipulate state.
• always fulfill all business invariants/business rules in context of its use.
• follows single responsibility principle