Question

Could someone please clarify what the code means:

public abstract class BaseJobProcessor<T> : JobProcessor where T : BaseQueueMessage  {}

Thank you v. much.

Answer 1

It means that any type that fills the position of T must be either BaseQueueMessage itself, or a class derived from it.

So you can say

public class MyQueueMessage : BaseQueueMessage { ... }

public class MyJobProcessor<T> : BaseJobProcessor<T> where T : BaseQueueMessage { ... }

MyJobProcessor<MyQueueMessage> jobProcessor = ...

But you can’t say

MyJobProcessor<string> jobProcessor = 

Because string is not derived from BaseQueueMessage