I want to let HandlerExceptionResolver resolve any Exceptions that I don't explicit catch via @ExceptionHandler annotation.
Anyways, I want to apply specific logic on those exceptions. Eg send a mail notification or log additionally. I can achieve this by adding a @ExceptionHandler(Exception.class) catch as follows:
@RestControllerAdvice
public MyExceptionHandler {
@ExceptionHandler(IOException.class)
@ResponseStatus(HttpStatus.BAD_REQUEST)
public Object io(HttpServletRequest req, Exception e) {
return ...
}
@ExceptionHandler(Exception.class)
public Object exception(HttpServletRequest req, Exception e) {
MailService.send();
Logger.logInSpecificWay();
//TODO how to continue in the "normal" spring way with HandlerExceptionResolver?
}
}
Problem: if I add @ExceptionHandler(Exception.class) like that, I can catch those unhandled exceptions.
BUT I cannot let spring continue the normal workflow with HandlerExceptionResolver to create the response ModelAndView and set a HTTP STATUS code automatically.
Eg if someone tries a POST on a GET method, spring by default would return a 405 Method not allowed. But with an @ExceptionHandler(Exception.class) I would swallow this standard handling of spring...
So how can I keep the default HandlerExceptionResolver, but still apply my custom logic?
To provide a complete solution: it works just by extending ResponseEntityExceptionHandler, as that handles all the spring-mvc errors.
And the ones not handled can then be caught using @ExceptionHandler(Exception.class).
@RestControllerAdvice
public class MyExceptionHandler extends ResponseEntityExceptionHandler {
@ExceptionHandler(Exception.class)
public ResponseEntity<Object> exception(Exception ex) {
MailService.send();
Logger.logInSpecificWay();
return ... custom exception
}
}