top.xhtml

Agregar dropMenu con <p:growl>, y <p:remmoteCommand> y un binding a

#{jmoordbNotificationsController.count}

<b:dropMenu id="dropMenuTop" class="badge badge-pill badge-danger" value="#{jmoordbNotificationsController.count}" iconAwesome="fa-bell-o" iconAlign="right">
      <b:navLink value="#{app['label.youhave']} #{jmoordbNotificationsController.count} #{app['label.notification']}" href="#"></b:navLink>

       <b:navLink value="#{app['menu.viewnotification']}"  outcome="/pages/notifications/list" iconAwesome="fa-bell-o"  />
       <p:growl id="growl_top" globalOnly="true" life="5000"  showDetail="true"  />
        <h:form id="topForm">
               <p:remoteCommand 
                            name="remoteCommandTop" 
                            update=":growl_top :dropMenuTop"
                            actionListener="#{jmoordbNotificationsController.actionWebSocket()}" 
                            process="@all">
                </p:remoteCommand>
         </h:form>
</b:dropMenu>