kocmana/spring-exception-handling

Showcase for unexpected Spring Exception Handling

Unexpected Spring Boot Controller Advice Behavior

This project aims to showcase an unexpected behavior of Spring Boot when dealing with exceptions: After the following code:

    try {
      throw new HttpClientErrorException(HttpStatus.BAD_REQUEST);
    } catch (HttpClientErrorException exception) {
      throw new TestException("Wrapped Exception", exception);
    }

both instances of HttpClientErrorException and TestException remain available in the application context.

Consequently, Spring ControllerAdvice classes can still have methods where the actually already caught HttpClientErrorException is injected:

  @ExceptionHandler(TestException.class)
  public ResponseEntity<ErrorResponse> catchTestException(HttpStatusCodeException exception){
      . . .
    }