Domain project referencing Mediatr

[claytonedk]

Hi, I noticed that the Domain project references Mediatr that is a implementation library. Is that OK for clean architecture ? I always thought that Domain should be clean and not references other libraries. Thank you for the template, nice job !

[ravvnen]

I noticed this aswell, curious to hear the response

[DevTKSS]

@jasontaylordev do you maybe have some answer to this? I discovered your template from @samanazadi1996 contribution here lately and have been wondering about both are using this now commercial licensed Package 🤔 Do you plan on replacing this or anything like mentioned from @claytonedk that would replicate its doing? I seen some youtube videos lately from well known MVP's that this is absolutly possible and how they doing it, but it would be genious if there would be a template that would already provide it ready to go 🚀

[jasontaylordev]

Do you plan on replace this

Not at this stage, quite happy to keep using MediatR - #1346 (comment)

[DevTKSS]

@jasontaylordev okay, thanks for your answer, Copilot told that its an Empty interface, can you tell for what do you use it then? I know for example for my clietapps the WeakReferenceMessenger from the CommunityToolkit which can also send "Messages" but I would guess your intention is slightly different than this?

[jasontaylordev]

I don't really know what you mean. Can you give me more details? What part of the system are you talking about?

[DevTKSS]

@jasontaylordev I am working for the Client Apps with a WinUI3 based codebase named Uno Platform and I seen their Mvux (MVU based) using this: https://platform.uno/docs/articles/external/uno.extensions/doc/Learn/Mvux/Advanced/Messaging.html#community-toolkit-messenger
but I just wanted to say with that, that I would not know for what a "Empty" Interface is so brilliant for. Not saying that it is not! I would just want to get your point in using this to understand why I maybe would want also to consider using it like in your template. I did never work with this QRS... sorry, forgot the naming...

[jasontaylordev]

Hi, I noticed that the Domain project references Mediatr that is a implementation library. Is that OK for clean architecture ? I always thought that Domain should be clean and not references other libraries. Thank you for the template, nice job !

It’s a small, intentional compromise that simplifies domain event handling. The Domain layer references MediatR’s INotification marker interface, but doesn’t depend on any of its behavior - just the contract.

The actual impact is minimal: one package reference and a single use of INotification in BaseEvent. If needed, this can easily be reversed later with very little effort.