What is the best approach to handle session timeouts in struts2

Question

I have a struts2 app and I need to handle the session-timeout in the logged section.

What I have in mind is to use an Interceptor class :

public class SessionInterceptor extends AbstractInterceptor {
  @Override
  public String intercept(ActionInvocation invocation) throws Exception {
      Map<String,Object> session = invocation.getInvocationContext().getSession();
      if(session.isEmpty())
          return "session";
      return invocation.invoke();
  }
}

In my struts.xml :

<struts>
  <interceptor name="session" class="ca.riq.regis.struts.interceptor.SessionInterceptor" /> 
  <interceptor name="admin" class="ca.riq.regis.struts.interceptor.AdminInterceptor" />

  <interceptor-stack name="adminStack">
    <interceptor-ref name="defaultStack"/>
    <interceptor-ref name="session"/>
    <interceptor-ref name="admin"/>
  </interceptor-stack>

  <action name="doaction" class="org.app.class" method="doAction">
    <interceptor-ref name="adminStack" />
    <result name="success">page.jsp</result>
    <result name="error">error.jsp</result>
    <result name="session">sessionexpired.jsp</result>
  </action>
</struts>

Is there a better approach ?

Thanks!