DataIntegrityViolationException handling

DataIntegrityViolationExceptionHandler.java

@Order(HIGHEST_PRECEDENCE)
@ExceptionHandler(DataIntegrityViolationException.class)
ResponseEntity<?> handleException(DataIntegrityViolationException ex, ServletWebRequest request) {
	String message = NestedExceptionUtils.getMostSpecificCause(ex).getMessage();
	String messageCode = message.replaceFirst(".*\"(.*)\"\\s(.|\\s)*", "$1"); // replace "bla-bla\"code\"\nbla-bla" to "code"
	var errorMessage = ApiErrorMessage.badRequest(messageProvider.getLocalizedMessage(messageCode));
	return super.handleExceptionInternal(ex, errorMessage, null, errorMessage.getHttpStatus(), request);
}