Take a look at the standard diagram of The Clean Architecture, and you will notice a layer labelled “Application Business Rules”, wherein the “Use Cases” are defined. Uncle Bob describes this layer, which I will… Read More »What is the application layer in The Clean Architecture?
CQRS is an architectural pattern whereby the system is separated according to two distinct responsibilities: reads/queries, and writes/commands. The basis for doing so it to recognise that it is impossible to effectively accommodate the needs… Read More »Command Query Responsibility Segregation
Encapsulation is one of the four pillars of object-oriented programming, along with abstraction, inheritance and polymorphism. The idea is to restrict access to an object’s internal state through the use of access modifiers, and only… Read More »Encapsulation
Task-based user interfaces are essential for domain-driven design and CQRS. Instead of presenting an interface consisting of data-oriented forms that allow the user to directly manipulate the data underlying the domain model in a nearly… Read More »Task-Based User Interfaces