Spring Boot: Exception Handling Best Practices

In a Spring Boot application, exception handling is an essential aspect of providing a robust and user-friendly API. One of the best practices for handling exceptions globally is to use @ControllerAdvice, which allows you to centralize exception handling across the entire application. In this article, we’ll walk through a real-life example of using custom exceptions in a product-related scenario, and demonstrate how to handle these exceptions globally using @ControllerAdvice.

@ControllerAdvice is a global exception handling mechanism in Spring. It allows you to define a central place for handling exceptions that occur in your application.

When an exception is thrown from any controller method (e.g., a REST endpoint), it is caught by the @ControllerAdvice annotated class.

The @ExceptionHandler methods within the @ControllerAdvice class handle specific exception types and return appropriate responses.

Use Case: ProductNotFoundException

Imagine a scenario where you are building an e-commerce application that has a Product Service responsible for fetching product details. If a product is not found, you want to throw a custom exception called ProductNotFoundException, and handle it globally using @ControllerAdvice to return a user-friendly error…