Global Exception Handling for UserNotFoundException

Overview

This implementation enhances the exception handling mechanism within the application by defining a custom exception, UserNotFoundException, and implementing a global exception handler to manage this exception effectively. The goal is to centralize exception handling, improving code maintainability and consistency.

Tasks

1. Define UserNotFoundException

• Objective: Create a custom exception class named UserNotFoundException.
• Steps:
  • Create a new class UserNotFoundException in the exception package.
  • Ensure that UserNotFoundException extends RuntimeException.

2. Implement Global Exception Handler

• Objective: Implement a global exception handler to manage the UserNotFoundException.
• Steps:
  • Create a new class GlobalExceptionHandler in the exception package.
  • Annotate the class with @ControllerAdvice to allow it to handle exceptions globally across all controllers.
  • Use the @ExceptionHandler annotation within this class to define a method that handles UserNotFoundException.
  • Ensure that the method returns an appropriate HTTP status code (e.g., 404 Not Found) and a meaningful error message.

3. Refactor Existing Code

• Objective: Refactor the existing controller code to remove local handling of UserNotFoundException.
• Steps:
  • Remove any try-catch blocks or local handling of UserNotFoundException within controller methods.
  • Ensure that the global exception handler is invoked when a user is not found.