How do i determine the error occured during login ?

[salvin francis]

I have an application which uses spring security for login authentication.
The Login page is made in gwt.

In case of an error, I need to display the error occured in the login screen,

this is how the sample example shows it to user:

<c:out value="${SPRING_SECURITY_LAST_EXCEPTION.message}"/>

How do I do it (I am Not using JSP here) ?

for ref-
This question is asked here too : http://stackoverflow.com/questions/1642431/how-do-i-check-for-errors-in-spring-security