Implement interceptor struts 2 filter all action fields data - interceptor

Question

I have implemented my first interceptor in struts 2. I think its very basic but when it runs before the action the action fields are all set to null.
Not sure what Im doing wrong
My interceptor class is
public class LoginInterceptor extends AbstractInterceptor {
private static final long serialVersionUID = 1L;
private static final Logger log = Logger.getLogger(LoginInterceptor.class);
#Override
public String intercept(final ActionInvocation invocation) throws Exception {
Map<String, Object> session = ActionContext.getContext().getSession();
User user = SessionUtilities.getUser(session);
if (user != null) {
return invocation.invoke();
}
Object action = invocation.getAction();
if (!(action instanceof LoginAction)) {
return "loginRedirect";
}
return invocation.invoke();
}
}
My struts.xml file is
<interceptors>
<interceptor name="login" class="ar.com.cipres.framework.logic.LoginInterceptor"/>
<interceptor-stack name="loginStack">
<interceptor-ref name="login"/>
</interceptor-stack>
</interceptors>
<default-action-ref name="go.home" />
<global-results>
<result name="loginRedirect" type="redirect">go.loginform.action</result>
<result name="exception" type="redirect">exception.jsp</result>
</global-results>
and finally one of my actions with problems is configured as
<action name="go.asociate.form" method="prepareAsociateData" class="ar.com.cipres.chacabuco.asociate.AsociateAction">
<interceptor-ref name="loginStack"></interceptor-ref>
<result name="success">chaca/socios/asociateupdate.jsp</result>
</action>
Any comment so far?
Thank you

Answer 1

I think I found the problem
I must include the defaulStack that was omitted when declared the new one.
So I need modify my struts.xml file as
<interceptors>
<interceptor name="login" class="ar.com.cipres.framework.logic.LoginInterceptor"/>
<interceptor-stack name="loginStack">
<interceptor-ref name="login"/>
<interceptor-ref name="defaultStack"/> <!-- Need to be added to mantain default functionality -->
</interceptor-stack>
</interceptors>
Going to try later