I have a class that is basically responsible for talking on a socket with a specific protocol.
I have a service class that uses objects of this class to continuously check for changed values to send value changes from user input.
I'm guessing it's in the data layer because there is IO.
Right now I have it in my model namespace but that doesn't seem right.
The project doesn't have any database connections, just the socket class for talking, so there's no repository namespace.
How should I classify this class? What namespace should it be in?
Assuming that your class wraps around a socket and provides methods for sending and receiving messages, I'd call it SomethingSomethingProtocol and put it in a package named protocol.
That's what I have done in the past at least. I don't know if there is a more generalized approach to this, it seems that Junilu might be onto something with Gateway, although I believe that's just another name for the Facade pattern.
There are really a few ways you can categorize this. SomethingSomethingProtocol is also reasonable. I think it kind of just depends on the semantics you want to have around the idea and how far up or down in the spectrum of abstraction you want the idea to sit. And there's nothing to prevent you from layering this as well. For example, if you combine the ideas of Gateway/Facade and Protocol, I'd imagine you could layer it like so:
/gateway # or facade
ServiceAIpV6Gateway # or *Facade
Something like that maybe, I don't know, that's just off the top of my head. Your full context may require some variation of that idea.
The best ideas are the crazy ones. If you have a crazy idea and it works, it's really valuable.—Kent Beck