Writing code for AOP

We discussed AOP previously in the Understanding the patterns and paradigms of Spring section. In simple terms, AOP is a programming paradigm that solves cross-cutting concerns such as logging, transactions, and security. These cross-cutting concerns are known as aspects in AOP. They allow you to modularize your code and place cross-cutting concerns in a central location.

The following code captures the time taken by a method to execute:

class Test  public void performSomeTask() {
    long start = System.currentTimeMillis();
    // Business Logic
    long executionTime =
           System.currentTimeMillis() - start;
    System.out.println("Time taken: " + executionTime + "ms");
  }
}

Time calculations are used for monitoring performance. This code captures the execution time (how...