How I Decoupled Circuit Breaker from the Code with AOP in Spring Boot for Better Code Maintenance

ApplicationResponseEntityExceptionHandler.java

//code is omitted for brevity

@RestControllerAdvice
@Component
public class ApplicationResponseEntityExceptionHandler extends ResponseEntityExceptionHandler {

  private static final Logger LOGGER = LoggerFactory.getLogger(ApplicationResponseEntityExceptionHandler.class);

  @ExceptionHandler(CircuitBreakerDownstreamCallException.class)
  public ResponseEntity<Map<String, Object>> handleException(final Exception exception, final HttpServletRequest request) {
    LOGGER.error("Downstream call Exception: {} ", exception.getMessage(), exception);
    Map<String, Object> responseBody = new HashMap<>();
    HttpStatus httpStatus = HttpStatus.GATEWAY_TIMEOUT;
    responseBody.put(exception.getMessage(), httpStatus.value());
    return new ResponseEntity<>(responseBody, httpStatus);
  }
}