@Before advice in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a method that runs before the target method using @Before advice.

Spring Boot

@Before("execution(* com.example.service.UserService.[1](..))")
public void beforeAdvice() {
    System.out.println("Before method execution");
}

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

AgetUser

BsetUser

CdeleteUser

DupdateUser

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method name that does not exist in the service.

Forgetting to include parentheses (..).

The @Before annotation uses a pointcut expression to specify which method to run before. Here, getUser is the target method name.

2fill in blank

medium

Complete the code to import the correct package for @Before advice in Spring AOP.

Spring Boot

import org.aspectj.lang.annotation.[1];

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ABefore

BAfter

CAround

DPointcut

Attempts:

3 left

💡 Hint

Common Mistakes

Importing the wrong annotation like @After or @Around.

Missing the import statement entirely.

The @Before annotation is in the org.aspectj.lang.annotation package.

3fill in blank

hard

Fix the error in the pointcut expression to correctly match all methods in the service package.

Spring Boot

@Before("execution(* com.example.service.[1].*(..))")
public void logBefore() {
    System.out.println("Method called");
}

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

A*

BUserService.*

CUserService..

DUserService

Attempts:

3 left

💡 Hint

Common Mistakes

Using double dots (..) incorrectly in the class name.

Adding extra wildcards in the class name.

The correct syntax to match all methods in a class is UserService.* but in the execution expression, the class name is followed by a dot and then the method pattern. Here, UserService is the class, and .* after it matches all methods.

4fill in blank

hard

Fill both blanks to create a @Before advice that runs before any method in any class inside the service package.

Spring Boot

@Before("execution(* com.example.service.[1].[2](..))")
public void beforeAnyMethod() {
    System.out.println("Before any service method");
}

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

A*

Bget*

Cset*

DUserService

Attempts:

3 left

💡 Hint

Common Mistakes

Using specific class or method names instead of wildcards.

Mixing wildcards with method name prefixes incorrectly.

Using * for the class name matches any class, and * for the method name matches any method.

5fill in blank

hard

Fill all three blanks to define a @Before advice that runs before all public methods in the controller package.

Spring Boot

@Before("execution(public [1] com.example.controller.[2].[3](..))")
public void beforeControllerMethods() {
    System.out.println("Before controller method");
}

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

A*

Dvoid

Attempts:

3 left

💡 Hint

Common Mistakes

Using specific return types like void limits matching.

Not using wildcards for class or method names.

Using * for return type, class name, and method name matches all public methods in any class inside the controller package.