public void removeListener(SessionListener sessionListener) {
final ServletExternalContext.SessionListeners listeners =
(ServletExternalContext.SessionListeners)
portletSession.getAttribute(
ServletExternalContext.SESSION_LISTENERS, PortletSession.APPLICATION_SCOPE);
if (listeners != null) listeners.removeListener(sessionListener);
}
public void addListener(SessionListener sessionListener) {
ServletExternalContext.SessionListeners listeners =
(ServletExternalContext.SessionListeners)
portletSession.getAttribute(
ServletExternalContext.SESSION_LISTENERS, PortletSession.APPLICATION_SCOPE);
if (listeners == null) {
listeners = new ServletExternalContext.SessionListeners();
portletSession.setAttribute(
ServletExternalContext.SESSION_LISTENERS, listeners, PortletSession.APPLICATION_SCOPE);
}
listeners.addListener(sessionListener);
}