Podcast
Questions and Answers
What is the purpose of @AfterReturning annotation in AOP?
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?
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?
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?
What is the most powerful type of advice in AOP?
What is the responsibility of around advice in AOP?
What is the responsibility of around advice in AOP?
When is after throwing advice executed in AOP?
When is after throwing advice executed in AOP?
What is the primary purpose of an Aspect in AOP?
What is the primary purpose of an Aspect in AOP?
What type of advice is executed after the join point method finishes executing, whether normally or by throwing an exception?
What type of advice is executed after the join point method finishes executing, whether normally or by throwing an exception?
What is a join point in Spring AOP?
What is a join point in Spring AOP?
What is the purpose of an advice in AOP?
What is the purpose of an advice in AOP?
What is the benefit of using AOP in terms of code maintenance?
What is the benefit of using AOP in terms of code maintenance?
What can be used to define an aspect in Spring AOP?
What can be used to define an aspect in Spring AOP?
What is one of the main issues with Code tangling?
What is one of the main issues with Code tangling?
What is the term for code that is scattered across multiple abstractions?
What is the term for code that is scattered across multiple abstractions?
What is the main issue with high-coupling?
What is the main issue with high-coupling?
What is the purpose of a Logger in the given code?
What is the purpose of a Logger in the given code?
What is the relationship between a LoyaltyProgram and a CustomerCard?
What is the relationship between a LoyaltyProgram and a CustomerCard?
What is the main problem with boilerplate code?
What is the main problem with boilerplate code?
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.
AOP Benefits
- Centralize concerns implementation
- Intercept method calls
- Inject new behavior
- More reusable code
- Cleaner code
- Write less code
- More maintainable
- Read less code
- More concise and easy to understand
AOP Problems
- Code tangling
- Code scattering
- Poor traceability
- High-coupling
- Boilerplate code
- Difficult to decompose
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Description
Learn about different types of advice in Aspect-Oriented Programming, including after returning, after throwing, and around advice.
