Spring – AOP

Before learning how to implement Aspect-oriented programming with Spring, we should first learn what Aspect-oriented programming is. The definition of Aspect-oriented programming says it is a programming paradigm that aims to increase modularity by allowing the separation of cross-cutting concerns. It does so by adding additional behavior to existing code (an advice) without modifying the code itself.

Now, what did we mean by cross-cutting concerns? Let's explore.

In a real-life project, multiple components play their own role. For example, if we take our previous scenario into account, the Student class itself is a component, similarly there could be a faculty component who would evaluate the student based on his/her performance. So, let's add a faculty to our program.

The Faculty class should be simple enough, with just a method to evaluate a student. Just as follows:

    class Faculty { 
      fun evaluateAssignment() { 
        val marks = Random().nextInt(10) 
        println...