Asp Net Domain Driven Design Example

Having read vaugh vernon s book on ddd implementation i decided to portgrade port upgrade my old clunky windows based n tier desktop expense tracking application to asp net core mvc application using some of the domain driven design concepts i studied in the book.

Asp net domain driven design example. Address cs is a value object iorderrepository is a repo interface order cs is an aggregate root orderitem cs is a child entity and orderstatus cs is an enumeration. In domain driven design your objective is to create a model of the domain. In this session we ll review a few ddd concepts and demonstrate how they can be applied within an asp net mvc solution to keep concerns separated and implementation details loosely coupled from business logic and your domain model.

A detailed view of the orderaggregate folder. In this post i will describe the overall architecture of the new expense tracking application and how various components fit. However for ddd the meaning of entity is very clear.

We have heard of different domains such as banking telecom supply chain health care etc so here domain means the business knowledge about that particular industry. Domain driven design provides a set of principles and patterns that are useful for tackling complex software problems. For example the order aggregate from the eshoponcontainers ordering microservice domain model is composed as shown in figure 7 11.

Then i did a podcast with bryan hogan where we discussed domain driven design ddd and he goes further than my crud only create read update and delete approach he says that the entity classes. The viewmodel as an example can have behavior methods to validate itself if need be with business rules acting upon the properties in the vm which can be called by another domain object like an inventory domain object calling a method in the inventory vm to validate itself and notify the inventory domain object that the vm is not valid as an. Konrad lukasik gives a simple example where some ddd patterns can help to clarify complex logic.

It can represent many different things. Domain driven design can often help but if the necessary prerequisites aren t there it could be that ddd lite can help. We design a domain concept as an entity when we care about its individuality when distinguishing if from all objects in a system is a mandatory constraint.

Sometimes in a software development the level of complexity in part of the project can get to a point where the experienced developers will rethink their strategy. You need to identify what are the items objects you need to accomplish the desired functionalities of your application. You need to identify the relationships among different objects and how they interact among themselves.