#ExceptionHandler with parameters not working - spring-mvc

Question

I am trying to capture all exceptions of some class in my Controller class. It works fine when
I define it like this:
#ExceptionHandler(NoSearchResultException.class)
public String handleNoSearchResultException() {
return "someView";
}
But not if I add any parameters:
#ExceptionHandler(NoSearchResultException.class)
public String handleNoSearchResultException(Exception e) {
return "someView";
}
What could possibly be happening? Also, I've read #ExceptionHandler does not support Model arguments, so how would I pass a parameter (like the error message for instance) to the view in order to offer a dynamic error page?

Answer 1

To pass a parameter to the view I would create a custom Exception class in which you can store any required model parameters (such as error messages). Then in #ExceptionHandler method you can extract those model parameters and make them available in the view. For example:
class RequestException extends RuntimeException {
...
public void setErrorMessages(List<String> errorMsgs) {
this.errorMessages = errorMsgs
}
...
}
#ExceptionHandler(RequestException.class)
public ModelAndView handleNoSearchResultException(RequestException ex) {
ModelAndView mav = new ModelAndView("someView");
mav.addObject("errors", ex.getErrorMessages()); //fetch error messages
return mav;
}
As for parameters, try specifying NoSearchResultException as method parameter instead of it's Exception superclass.
EDIT:
Had a bug in 2nd example return value.

Answer 2

I Solved the problem by passing the custom arguments in request itself.
code is as below :
Controller
#RequestMapping(method = RequestMethod.GET, value = "/exception2")
public String getException1(ModelMap model, #CRequestParam("p") String p, HttpServletRequest request) {
System.out.println("Exception 2 " + p);
request.setAttribute("p", p);
throw new CustomGenericException("1", "2");
}
Exception Handler
#ExceptionHandler(CustomGenericException.class)
public ModelAndView handleCustomException(CustomGenericException ex, HttpServletRequest request) {
ModelAndView model2 = new ModelAndView("error/generic_error");
model2.addObject("exception", ex);
System.out.println(request.getAttribute("p"));
System.out.println("CustomGenericException ");
return model2;
}
here is Sackoverflow question and its answer and
Complete source code is available at git