Hi, there is a way to check if there is an active session directly in jsf page? I have try this but it doesn't work:

<p:ajaxStatus onerror="#{session == null ? 'idleDialog.show();' : null}"

thank you in advance

@Update I have see that onerror isn't fired even if viewExpiredException occurr.

@Update 1 Ok i have implemented something that may work:

    <h:form>
        <p:idleMonitor timeout="10000"
                       idleListener="#{idleMonitorController.idleListener}"
                       onidle="sessionPoll.stop();idleDialog.show();"/>
    </h:form>
    <p:dialog header="Sessione scaduta per inattività"
              widgetVar="idleDialog"
              modal="true"
              width="400">
        <h:outputText value="Sessione scaduta" />
        <h:button value="Ripristina Sessione"
                  onclick="idleDialog.hide();sessionPoll.start();" />
    </p:dialog>
    <h:form prependId="false">
        <p:poll widgetVar="sessionPoll"
                interval="1"/>
    </h:form>

and this is the listner:

    public void idleListener(IdleEvent event) {
        System.out.println("aaaa");
         final HttpServletRequest request = (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext().getRequest();
         request.getSession(false).invalidate();
}

now the only problem is that the session.invalidate doesn't work