Introduction to Domain Driven Design

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Domain-driven design provides techniques to analyze a problem in a doable manner. Nowadays, Software has become a crucial part of contemporary business. And as companies grow, their systems develop with them. Through the years, minor problems emerge as larger, and shortly tasks start to fall apart below their own weight. We need equipment in order to allow us to take the huge issues, and decompose them into something smaller. This allows developers to be cognizant of the venture at hand, while not fearing all the other complexities surrounding it.

What does Domain-Driven Design do?

The domain-driven design takes a big machine, or a big area rather, and interrupts it into smaller and smaller portions. The trouble that we’ve got with huge domains is they may be very hard to version. There are a whole lot of regulations and numerous various things that we must hold in mind while we’re looking to model a big domain. Domain-driven design gives us a set of guidelines and a set of techniques that we can use to break larger domains into smaller domains.

What’s a Domain?

Domain refers to a business or idea that we are trying to model. Usually, while we build software there’s some type of idea or commercial enterprise that we’re looking to model, and this is our domain. Basically, business logic is the area of knowledge around which application logic revolves. A domain in the software engineering field is the business on which the application is intended to build. When modeling systems we have to choose the most appropriate domain boundaries with which to align our software and organizational boundaries.


If we take an e-commerce app, for instance, the enterprise domain could be to system an order. When a purchaser wants to area an order, they first need to go through the goods. Then, they pick their desired ones, verify the order, pick transport type, and pay. The app then tactics the statistics the customer gives.

So, an app would consist of the following layers:

Domain Layer

The domain layer includes the actual enterprise common sense however does not contain any infrastructure-specific code. The infrastructure layer offers precise infrastructure implementation. The area version ought to be designed as described with the aid of the cqs(command-query-separation) principle.

Application Layer

This layer doesn’t comprise business logic. It’s the component that leads the user from one to some other UI screen. It also interacts with utility layers of different structures.

User Interface Layer

The user interface layer consumes application services and invokes enterprise logic on those services. Each invocation is a new transaction. This sediment affords the facts to the customer and translates their moves.

Infrastructure Layer

The infrastructure layer gives the infrastructure based additives for all other layers. Infrastructure can be excellently described as the whole lot around the vicinity version, so databases, file system assets, or even internet provider purchasers if we have interplay with distinct systems.

Advantages of Domain-Driven Design

  • Makes communication between developers and people on the business side easier.
  • It provides flexibility.
  • It helps in writing a testable and clear code that represents the domain.

Disadvantages of Domain-Driven Design

  • It requires a professional who has strong domain expertise
  • This often results in a longer development and duration that ultimately translates to higher costs for the business.
  • It’s not very well-suited for applications that have marginal domain complexity but conversely, have a great deal of technical complexity.


Thanks for reading !!

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I am Software Consultant at Knoldus and I am curious about learning new technologies.