@Aspect annotation in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a class as an aspect using the correct annotation.

Spring Boot

@[1]
public class LoggingAspect {
    // aspect code here
}

Drag options to blanks, or click blank then click option'

AAspect

BComponent

CService

DRepository

Attempts:

3 left

💡 Hint

Common Mistakes

Using @Component instead of @Aspect

Forgetting the '@' symbol

Using unrelated annotations like @Service

The @Aspect annotation marks a class as an aspect in Spring AOP.

2fill in blank

medium

Complete the code to define a pointcut expression that matches all methods in the service package.

Spring Boot

@Pointcut("execution(* com.example.service..[1]*(..))")
public void serviceMethods() {}

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A#

B.

C+

D*

Attempts:

3 left

💡 Hint

Common Mistakes

Using '.' which matches package separator

Using '+' or '#' which are not valid here

The '*' wildcard matches any method name in the pointcut expression.

3fill in blank

hard

Fix the error in the advice method declaration by completing the annotation.

Spring Boot

@[1]("serviceMethods()")
public void logBefore() {
    System.out.println("Method is about to execute");
}

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ABefore

BAfterReturning

CAround

DAfter

Attempts:

3 left

💡 Hint

Common Mistakes

Using @After instead of @Before

Using @Around without proper method signature

The @Before annotation runs advice before the matched method executes.

4fill in blank

hard

Fill both blanks to create an aspect class that logs before and after method execution.

Spring Boot

@Aspect
public class LoggingAspect {
    @[1]("execution(* com.example..*(..))")
    public void logStart() {
        System.out.println("Start method");
    }

    @[2]("execution(* com.example..*(..))")
    public void logEnd() {
        System.out.println("End method");
    }
}

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ABefore

BAfterReturning

CAfter

DAround

Attempts:

3 left

💡 Hint

Common Mistakes

Using @AfterReturning instead of @After for the second advice

Mixing up the order of annotations

Use @Before to run code before method execution and @After to run code after method execution.

5fill in blank

hard

Fill all three blanks to define an around advice that logs method execution time.

Spring Boot

@Aspect
public class PerformanceAspect {
    @Around("[1]")
    public Object measureTime(ProceedingJoinPoint [2]) throws Throwable {
        long start = System.currentTimeMillis();
        Object result = [3].proceed();
        long end = System.currentTimeMillis();
        System.out.println("Execution time: " + (end - start) + "ms");
        return result;
    }
}

Drag options to blanks, or click blank then click option'

Aexecution(* com.example..*(..))

BjoinPoint

Dexecution(* com.example.service..*(..))

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong pointcut expression

Mismatching parameter name and usage

Forgetting to call proceed()

The pointcut expression matches all methods, the parameter is named joinPoint, and proceed() is called on it.