Java AOP (Using Aspect J)
- What is and Why AOP?
- AOP terminology
- Spring AOP (covered in Spring course)
What is & Why AOP?
OOP Design is good but..
- The OOP makes the code design more reusable and compact
- But, in some cases, it makes the code scattered in number of modules
- Adding logging in each of class methods makes the logging code scattered in number of methods and classes.
- This makes code maintenance and update a tedious work.
Issues that do not get solved by OOP
- Code scattering
- Same concern spread across modules
- Code tangling
- Coupling of different concerns
AOP is the solution
- Aspect Oriented Programming(AOP) addresses these issues.
- Instead of adding the logging code in each of the methods, you delegate the logging functionality (concern) to an AOP container and specify which methods require logging applied.
- The container will call the logging aspect of the code when the methods are invoked on the proxy object returned by the Container.
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