Spring HandlerMethodArgumentResolver not executing

Question

I am using Spring MVC 3.2.2

I have defined a custom HandlerMethodArgumentResolver class like this

public class CurrentUserArgumentResolver implements         


        

Answer 1

OK I worked out that Spring was already resolving the Principal object in my above example and so my argument resolver was not kicking in. I had been lazy and added the @CurrentUser annotation to an existing parameter.

So I changed my example

@RequestMapping(method = RequestMethod.POST, value = "/update")
public ModelAndView update(@RequestParam MultipartFile background, @CurrentUser Principal principal) {
  ...
}

to use my User model class

@RequestMapping(method = RequestMethod.POST, value = "/update")
public ModelAndView update(@RequestParam MultipartFile background, @CurrentUser User user) {
  ...
}

and now it works!