How can I implement rollback in Spring Boot?

How can I implement rollback in Spring Boot?

In Spring Boot, you can use the @Transactional annotation to manage rollback behavior. When a method annotated with @Transactional throws a runtime exception, the transaction will automatically roll back.

Can you give me an example of using @Transactional for rollback?

Sure! Here's a simple example:

@Service
public class UserService {
    @Transactional
    public void createUser(User user) {
        userRepository.save(user);
        // Simulate an error
        if (user.getName() == null) {
            throw new RuntimeException("User name cannot be null");
        }
    }
}

In this example, if user.getName() is null, the transaction will roll back.

What happens if I want to rollback on checked exceptions?

By default, Spring only rolls back on unchecked exceptions (subclasses of RuntimeException). To roll back on checked exceptions, you can specify it in the @Transactional annotation like this:

@Transactional(rollbackFor = Exception.class)