FilterManager filterManager = filterInitialisation(portletWindow,PortletRequest.EVENT_PHASE);
List<Event> events = null;
try
{
invoker.event(requestContext, portletRequest, portletResponse, filterManager);
debugWithName("Portlet event processed for: "
+ portletWindow.getPortletDefinition().getPortletName());
// Mark portlet interaction is completed: backend implementation can flush response state now