primefaces p:commandButton using both actionListener and action attrributes

Question

I'm using jsf 2 and primefaces 4 .
I have gone through the following link Click Here and used in my application, actionListener for executing validation logic as well as business logic .
action attribute for redirecting.

So for it is fine but if i get any validation errors, i must show them on the same page. This means it is ajax response.
I tested this case, even there are validation errors, it is redirecting to another page as mentioned in action attribute

if no validation errors, it should be redirected to another page, this is not ajax response in this case.
So how to handle both the situations ?
Any help is highly appreciated

Answer 1

I have implemented this by instructions given in comments by @Hatem Alimam and @Jaqen H'ghar .
solution:
I used action to execute validations and business logic and redirecting based on success or errors .
After redirecting to another page, showing notification using flash scope is useful a lot.

FacesContext.getCurrentInstance().getExternalContext().getFlash().setKeepMessage‌​s(true);