Spring Boot AOP Example

In this article, we will learn What is AOP ? Why we need AOP ? How to implement AOP in our spring boot project?

What is AOP ?
AOP is an Aspect Oriented Programming paradigm to increase modularity by allowing the separation of cross-cutting concerns.
These cross cutting concerns are different from the main business logic. We can add additional behavior to existing code without modification of the code itself.
Spring AOP helps us to implement these cross cutting concerns. Using Spring AOP, we can define common functionality in one place.

But Why need AOP in our Spring boot project ?
In our project there are different layers like controller, service and Dao layer. Each layer has different functionality but there are some common aspects that we need to apply to all layers are logging, Transaction management, Security, validation etc. These common aspects are called cross-cutting concerns.

For Example there is as requirement, we need to implement these concerns in each layer separately, the code becomes more difficult to maintain. To overcome this type of problem, Aspect Oriented Programming (AOP) provides a solution to implement cross cutting concerns.

Benefits of AOP :
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1). First the logic for each concern is now in one place instead of scattered all over the code base.
2). Second, the business modules only contain code for their primary concern. The secondary concern has been moved to…