Connell

This an opinion I've held for some years now. The title is a little disingenuous. What I actually mean is that business classes should not be concerned with what they need to log. Take this example.

Those that have worked with me will know I'm a big advocate for Aspect-Oriented Programming. I generally like to "bolt on" concerns that sit outside of the main logic using the decorator pattern or some kind of behaviour that can wrap around a class or method, which follows the Open/Closed principle.