allra-error-handling

Standardize REST API error handling by implementing a custom exception hierarchy extending a base BusinessException and a global exception handler that maps exceptions to a consistent DTO error response format. This ensures predictable error responses across all backend services.

The best way to structure custom backend exceptions is to create domain-specific exceptions that extend a base BusinessException. This hierarchy allows a global exception handler to centrally catch errors and map them to standardized REST API responses.

Implement a global exception handler to centrally catch all backend exceptions, map them to appropriate HTTP status codes, and return a standardized error response DTO. This ensures consistent REST API error management and predictable client-facing messages.

Apply appropriate logging levels for different backend events: use INFO for expected business exceptions, WARN for recoverable system issues, and ERROR for unexpected system exceptions. This ensures effective troubleshooting and consistent error management across services.

You need a standardized error response format when multiple backend services must return predictable REST API errors. Using a consistent DTO format for all API error messages ensures clients can handle exceptions uniformly and improves system reliability.

Yes, this backend error handling framework works without external dependencies. It provides a comprehensive internal design using custom exception classes, a global exception handler, and a standardized DTO response format to manage REST API errors independently.