How to separate business logic from UI?
Separating the UI from Business Logic The concept is simple: divide a computer program into sections that each address a separate and distinct concern of the application. This so-called “concern” can be something as simple as naming a class that is instantiated or as broad as platform specific details (Figure 1).
What is event driven model?
Event-driven architecture is a software architecture and model for application design. With an event-driven system, the capture, communication, processing, and persistence of events are the core structure of the solution. This differs from a traditional request-driven model.
How does event driven design work with EF Core?
The event-driven design helps apply a Domain-Driven Design to your code. Adds (some) complexity to your application. The rest of the article gives examples of how the event-driven design works with EF Core.
Why is it important to use event driven design?
Using is event-driven design helps you to apply an Separation of Concerns in your application. The design is robust by design. It saves the original data that caused the events with the data updated by the event handler together in one transaction.
Why are event driven architectures hard to test?
And this chapter from the book Software Architecture Patterns says event-driven architectures have many useful features, but they are hard to build and test. One reason for that is because designing a system that is robust, i.e. works in all situations, requires significant thought and code.
How is event triggered in Entity Framework Core?
An event is triggered in an entity class that you have read in and is tracked, i.e. it wasn’t loaded with a query that has the .AsNoTracking in it. This is because the event runner only looks for events in tracked entities. You can send an event from anywhere, but the typical approach is to trigger an event when something changes.