Domain Logic in One Place

In this article, I want to examine one of the most common problems I have faced while working on many applications, legacy or not. I will also suggest an alternative solution, but first, I will need to lay out why I think this is happening and what we could look out for to avoid it in the first place. I am unaware of an official name for this phenomenon; however, I call it “scattered business logic”. It simply means that the business rules which describe the problem and its solution often are spread out in multiple files and even technologies instead of being in one place.