Spring security authenticate exceptions handling

Question

I have an app using Spring Security 3.0.x. There I have a custom AuthenticationProvider:

public class A         


        

Answer 1

Authentication failure handler :

public class CustomAuthenticationFailureHandler extends SimpleUrlAuthenticationFailureHandler {

@Override
public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) throws IOException, ServletException {
  super.onAuthenticationFailure(request, response, exception);
  if(exception.getClass().isAssignableFrom(UsernameNotFoundException.class)) {
    showMessage("BAD_CREDENTIAL");
  } else if (exception.getClass().isAssignableFrom(DisabledException.class)) {
    showMessage("USER_DISABLED");
  }
}

configuration :