Showing Action Exception as Ajax Errors

[Alireza Fattahi]

Hi,

We are using struts2 JSONValidationWithInterceptor. This interceptor grabs the 
errors from validation and convert them to json message
How can we have same feature! An interceptor which grabs the action exceptions 
and serialize them as json errors.

I try below interceptor. When an exception happens it works, when there are no 
errors and I should pass {} to response it is not working!
_______________________________________________

String target=Action.NONE;
        try {
             target=invocation.invoke();
             response.getWriter().print("{}");                
            response.setContentType("application/json");
             return target;
        }

        catch (BussinessException ex) {
            StringBuilder sb = new StringBuilder();
            sb.append("{ ");
            sb.append("\"errors\": [\"");
            sb.append("Bussiness Exception Happend");
            sb.append("\"]}");
            response.setContentType("application/json");
            response.getWriter().print(sb.toString());    
            return Action.NONE;
         
        }


 
~Regards,
~~Alireza Fattahi