Question 1

How to use Xer.Cqrs with ASP.NET Core?

Accepted Answer

Integrate Xer.Cqrs into ASP.NET Core by using the Microsoft.DependencyInjection extension package. Register command and event handlers in the Startup or Program class via the provided container adapter, similar to standard DI setups for handler resolution.

Question 2

Xer.Cqrs vs MediatR: which is better for CQRS?

Accepted Answer

Xer.Cqrs is more specialized for CQRS write-side with built-in DDD components, while MediatR is a general mediator pattern library handling both commands and queries. Choose Xer.Cqrs for lightweight, focused CQRS with DDD; MediatR if you need a broader mediator for various message types in .NET.

Question 3

Does Xer.Cqrs support event sourcing?

Accepted Answer

No, Xer.Cqrs does not include built-in event sourcing features. It handles domain events but requires external libraries or custom code for persistent event stores, replay, and other event-sourcing patterns.

Question 4

What IoC containers does Xer.Cqrs work with?

Accepted Answer

Xer.Cqrs supports Microsoft.DependencyInjection, SimpleInjector, and Autofac through separate extension packages. These adapters allow seamless integration with popular .NET IoC containers for handler registration and resolution.

Question 5

How to register command handlers using attributes in Xer.Cqrs?

Accepted Answer

Use the Xer.Cqrs.CommandStack.Extensions.Attributes package to mark methods with [CommandHandler] attributes. Then, register these handlers via the library's registration methods, though setup may involve additional configuration as per the extension's documentation.

Question 6

Is Xer.Cqrs good for microservices?

Accepted Answer

Yes, its modular and pluggable design makes it suitable for microservices where lightweight command and event handling is needed. However, you must handle cross-service communication, event publishing, and consistency patterns separately, as it lacks built-in distributed systems features.

Xer.Cqrs

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