Spring Boot Aspect-Oriented Programming 4

Question 1

Which PCD matches join points where the subject has a given annotation at the type level?

Accepted Answer

@within

Answer

@within() matches join points in types that carry the specified annotation, whereas @annotation() matches methods carrying it directly.

Question 2

What is a 'weaving' phase in AOP terminology?

Accepted Answer

Linking aspects with application types to create advised objects

Answer

Weaving is the process of applying aspects to a target object, which can happen at compile time, load time, or runtime (as in Spring AOP).

Question 3

How do you bind a method's return value inside an @AfterReturning advice?

Accepted Answer

Set the 'returning' attribute on @AfterReturning to match a method parameter name

Answer

The 'returning' attribute of @AfterReturning must match the advice method parameter name where the return value will be injected.

Question 4

Which of the following correctly combines two pointcut expressions with a logical AND?

Accepted Answer

execution(* *.*(..)) && within(com.example.*)

Answer

Pointcut expressions use Java-style && (and ||, !) for logical composition inside @Pointcut and advice annotations.

Question 5

In Spring AOP, which join point type is supported?

Accepted Answer

Method execution

Answer

Spring AOP only supports method execution join points; field access and constructor join points require full AspectJ weaving.

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