Types of Advice in Aspect-Oriented Programming

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Questions and Answers

What is the purpose of @AfterReturning annotation in AOP?

To execute a method only when the join point method executes normally (correct)

To identify the specific events with which advice should be associated

To execute a method only when the join point method throws an exception

To surround the join point method and invoke it if required

What is the purpose of @AfterThrowing annotation in AOP?

To execute a method only when the join point method executes normally

To rollback the transaction declaratively when an exception is thrown (correct)

To surround the join point method and invoke it if required

To identify the specific events with which advice should be associated

What is the purpose of a pointcut?

To surround the join point method and invoke it if required

To identify the specific events with which advice should be associated (correct)

To execute a method only when the join point method throws an exception

To execute a method only when the join point method executes normally

What is the most powerful type of advice in AOP?

Around Advice Signup and view all the answers

What is the responsibility of around advice in AOP?

To invoke the join point method and return values if the method is returning something Signup and view all the answers

When is after throwing advice executed in AOP?

Only when the join point method throws an exception Signup and view all the answers

What is the primary purpose of an Aspect in AOP?

To implement enterprise application concerns that cut across multiple classes Signup and view all the answers

What type of advice is executed after the join point method finishes executing, whether normally or by throwing an exception?

After (finally) advice Signup and view all the answers

What is a join point in Spring AOP?

The execution of a method Signup and view all the answers

What is the purpose of an advice in AOP?

To take actions for a particular joint point Signup and view all the answers

What is the benefit of using AOP in terms of code maintenance?

Write less code and read less code Signup and view all the answers

What can be used to define an aspect in Spring AOP?

Both XML configuration and Spring AspectJ integration Signup and view all the answers

What is one of the main issues with Code tangling?

It breaks the linkage between requirement and its implementation Signup and view all the answers

What is the term for code that is scattered across multiple abstractions?

Code scattering Signup and view all the answers

What is the main issue with high-coupling?

It makes code harder to decompose Signup and view all the answers

What is the purpose of a Logger in the given code?

To log messages Signup and view all the answers

What is the relationship between a LoyaltyProgram and a CustomerCard?

A CustomerCard is part of a LoyaltyProgram Signup and view all the answers

What is the main problem with boilerplate code?

It is hard to maintain Signup and view all the answers

Study Notes

AOP Terminologies

Aspect: A class that implements enterprise application concerns that cut across multiple classes, such as transaction management.
Join point: A specific point in the application, such as method execution, exception handling, or changing object variable values. In Spring AOP, a join point is always the execution of a method.
Advice: Actions taken for a particular joint point.
Pointcut: Expressions that are matched with a joint point to determine whether advice needs to be executed or not, identifying specific events with which advice should be associated.

AOP Advice Types

Before Advice: Runs before the execution of join point methods, using the @Before annotation.
After Returning Advice: Executes only if the join point method executes normally, using the @AfterReturning annotation.
After Throwing Advice: Executes only when the join point method throws an exception, using the @AfterThrowing annotation.
Around Advice: Surrounds the join point method, allowing the choice to execute the join point method or not, using the @Around annotation.