If your objective is to redirect the user to the login page before accessing a secure page (like pageU.jsp), making use of the Glassfish realms, you could use form based authentication after making the pageU.jsp secure:
<login-config>
<auth-method>FORM</auth-method>
<form-login-config>
<form-login-page>/LoginA.jsp</form-login-page>
<form-error-page>/loginError.html</form-error-page>
</form-login-config>
</login-config>
You would be required to have the following in LoginA.jsp:
<form method="POST" action="[b]j_security_check[/b]">
<input type="text" name="[b]j_username[/b]">
<input type="password" name="[b]j_password[/b]">
</form>
If the page-to-be-redirected after successful authentication (say pageU.jsp) is made a welcome file and a secured, accessing the application, redirects the user to LoginA.jsp, and if successful, redirects user to pageU.jsp, and if not, to loginError.html.
Would this help your use-case?
Nithya
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