@ControllerAdvice for global handling in Spring Boot - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of @ControllerAdvice in Spring Boot?

@ControllerAdvice is used to handle exceptions and apply global configurations across multiple controllers in a Spring Boot application. It helps centralize error handling and common logic.

beginner

How does @ExceptionHandler work inside a @ControllerAdvice class?

<p><code>@ExceptionHandler</code> methods inside a <code>@ControllerAdvice</code> class catch specific exceptions thrown by any controller and allow you to define a custom response or view for those errors.</p>

intermediate

Can @ControllerAdvice be used to modify the response body for all controllers?

Yes, by combining @ControllerAdvice with @ResponseBody or returning ResponseEntity, you can modify or customize the response body globally for all controllers.

intermediate

What is the difference between @ControllerAdvice and @RestControllerAdvice?

@RestControllerAdvice is a specialized version of @ControllerAdvice that combines it with @ResponseBody, so all methods return JSON or XML directly without needing to annotate each method.

advanced

How do you limit @ControllerAdvice to specific controllers or packages?

You can use attributes like basePackages, assignableTypes, or annotations on @ControllerAdvice to restrict its scope to certain controllers or packages.

What annotation do you use to create a global exception handler in Spring Boot?

A @Service

B @ControllerAdvice

C @Repository

D @Component

@ControllerAdvice is designed for global exception handling and controller advice.

Which annotation inside @ControllerAdvice handles specific exceptions?

A @RequestMapping

B @GetMapping

C @ResponseBody

D @ExceptionHandler

@ExceptionHandler methods catch exceptions globally when used inside @ControllerAdvice.

What does @RestControllerAdvice automatically include?

A @ResponseBody

B @RequestBody

C @Service

D @Component

@RestControllerAdvice combines @ControllerAdvice and @ResponseBody for JSON responses.

How can you restrict @ControllerAdvice to only certain packages?

A Using <code>@Repository</code>

B Using <code>@ComponentScan</code>

C Using <code>basePackages</code> attribute

D Using <code>@Service</code>

The basePackages attribute limits the advice to specific packages.

Where should you place @ControllerAdvice classes?

A Anywhere in the project, Spring will detect them

B Only inside controller packages

C Only inside service packages

D Only inside repository packages

Spring scans the whole project for @ControllerAdvice classes automatically.

Explain how @ControllerAdvice helps with global exception handling in Spring Boot.

Think about how one place can handle errors for many parts of your app.

Describe the difference between @ControllerAdvice and @RestControllerAdvice.

Focus on how the response is sent back to the client.