/**
  * Notify session will passivate.
  *
  * @param event the event
  */
 protected void notifySessionWillPassivate(HttpSessionEvent event) {
   for (cn.com.rebirth.core.web.HttpSessionEvent httpSessionEvent : sessionEvents) {
     httpSessionEvent.sessionDestroyed(event);
   }
 }
 /**
  * Notify session did activate.
  *
  * @param event the event
  */
 protected void notifySessionDidActivate(HttpSessionEvent event) {
   for (cn.com.rebirth.core.web.HttpSessionEvent httpSessionEvent : sessionEvents) {
     httpSessionEvent.sessionCreated(event);
   }
 }