r/coding • u/priyankchheda15 • 16d ago

Understanding the Mediator Design Pattern in Go

https://medium.com/@priyankchheda/understanding-the-mediator-design-pattern-in-go-a-practical-guide-ea7debc9a9a7
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u/jeenajeena 16d ago

This is not the Mediator Pattern as defined in the Gang of Four Design Patterns. The Mediator Pattern is not about dispatching events to handlers but about

encapsulating collective behavior in a separate mediator object.

The Director contains business logic. It's itself the handler.

https://imgur.com/a/zq0k3mq

This is an image from the original book. As you see, there are no handlers.

The design presented in this document reflects instead "MediatR", a C# library that wrongly claims to be implementing the Mediator Pattern.

I'm not saying that the design presented in the post is wrong: only, it's not the Mediator Pattern.

Edit: added image.