How to return Java Exception info to jQuery.ajax REST call?

Question

I have some jQuery code that makes a REST call to a Java back end. Processing of the back end function could encounter an Exception. What is the best way to get this infor

Answer 1

I was able to send a custom error message (java String) back to a jQuery based client this way. I think my custom message can be replaced with the exception info you want/need

in Controller:

public static void handleRuntimeException(Exception ex, HttpServletResponse 
                                          response,String message) {
        logger.error(ex);
        response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
        response.getWriter().write(message);
        response.flushBuffer();
}

In client/javascript (called from ajax on error event)

displayError:function(jqXHR, textStatus, errorThrown){
   if(jqXHR.responseText !== ''){
        alert(textStatus+": "+jqXHR.responseText);
    }else{
        alert(textStatus+": "+errorThrown);
    }  
}

Hope this helps/