Handling exceptions in Spring MVC along with Rest API

Question

I am using @ControllerAdvice annotation for defining exceptions at application level. Now the problem is I am having two @ControllerAdvice classes, one for REST and one for the normal web app. When I define @ExceptionHandler for Exception.class in both, only the first one is considered. How do I separate both? Or how can I catch an Exception and determine from where it has occured? Is there a way or else do I need to use controller-specific exception handlers?

Answer 1

I resolved this issue by creating a custom exceptions for my application and giving one exception handler method for each of them with @exception handler.

I also used aspects to make sure that every exception is converted to any of the custom exceptions.

@Aspect
@Component
public class ExceptionInterceptor {

    @AfterThrowing(pointcut = "within(x.y.package..*)", throwing = "t")
    public void toRuntimeException(Throwable t)
            throws ApplicationException1, ApplicationException2,ApplicationException3 {
        if (t instanceof ApplicationException1) {

            throw (ApplicationException1) t;
        } else if (t instanceof ApplicationException2) {

            throw (ApplicationException2) t;
        }  else 
            throw (ApplicationException3) t;
        }
}

These will transfer control to @controlleradvice.

Answer 2

I noticed this have been left for a month or so, so it might be old. But this article may help http://www.baeldung.com/2013/01/31/exception-handling-for-rest-with-spring-3-2/.

The section 3.5 is probably what you are looking for, a custom Exception Resolver.