Problem Statement
Migration to Spring 4
from Spring 3
induces some exceptions in exception handling flow.
The Exception says No suitable resolver for argument
in the org.springframework.web.method.support.InvocableHandlerMethod
class.
So whenever and exception occurs Spring
tries to find the Exception Handler which it gets
but when it tries to populate the method arguments or exception Handler it throws the below exception
Failed to invoke @ExceptionHandler method:
public org.springframework.web.servlet.ModelAndView
HelloController.handleCustomException(CustomGenericException, javax.servlet.http.HttpServletRequest, org.springframework.web.servlet.ModelAndView)
java.lang.IllegalStateException:
No suitable resolver for argument [2]
[type=org.springframework.web.servlet.ModelAndView]
HandlerMethod details:
Controller [HelloController]
Method [public org.springframework.web.servlet.ModelAndView
HelloController.handleCustomException(CustomGenericException,
javax.servlet.http.HttpServletRequest,org.springframework.web.servlet.ModelAndView)]
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(
InvocableHandlerMethod.java:169)
It basically comes for @CRequestParam("p") String p
variable
Code
Controller
@RequestMapping(method = RequestMethod.GET, value="/exception2")
public String getException1(ModelMap model, @CRequestParam("p") String p) {
System.out.println("Exception 2 "+ p);
throw new CustomGenericException("1","2");
}
Exception Handler
@ExceptionHandler(CustomGenericException.class)
public ModelAndView handleCustomException(CustomGenericException ex,
HttpServletRequest request, @CRequestParam("p") String p) {
ModelAndView model = new ModelAndView("error/generic_error");
model.addObject("exception", ex);
System.out.println("CustomGenericException ");
return model;
}
Annotations
@Target( { ElementType.PARAMETER })
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface CRequestParam {
String value() default "";
}
Param Resolver
public class CRequestparamResolver implements HandlerMethodArgumentResolver {
@Override
public boolean supportsParameter(MethodParameter methodParameter) {
CRequestParam requestParamAnnotation =
methodParameter.getParameterAnnotation(CRequestParam.class);
if(requestParamAnnotation==null){
return false;
}
return true;
}
@Override
public Object resolveArgument(MethodParameter methodParameter,
ModelAndViewContainer mavContainer, NativeWebRequest webRequest,
WebDataBinderFactory binderFactory) throws Exception {
CRequestParam requestParamAnnotation = methodParameter .getParameterAnnotation(CRequestParam.class);
if (requestParamAnnotation != null) {
String requestParamName = requestParamAnnotation.value();
if (StringUtils.hasText(requestParamName)) {
return webRequest.getParameter(requestParamName);
}
}
return null;
}
XML Configuration
<bean
class="com.mkyong.common.resolver.AnnotationMethodHandlerAdapterConfigurer"
init-method="init">
<property name="customArgumentResolvers">
<list>
<bean class="com.mkyong.common.resolver.CRequestparamResolver" />
</list>
</property>
</bean>
<bean
class="org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver">
<property name="customArgumentResolvers">
<list>
<bean class="com.mkyong.common.resolver.CRequestparamResolver" />
</list>
</property>
</bean>
Source Code
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;
}
Complete source code is available at git