> 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;
> }
>
invocation.invoke() does these things:
- execute remaining interceptors
- execute action
- execute result (e.g. rendering a JSP)
- execute remaining interceptors again (what they do after
invocation.invoke())
So, when no exception is thrown the response has already been created and
the lines
response.getWriter().print("{}");
response.setContentType("application/json");
have no effect.
You can try to change the action to return Action.NONE
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