Failure and Exception Handling

In case of failure, handleEvent() method may throw PortletException. Container will catch that exception and stop sending the events from the event queue. Container then sends another event called eventHandlingFailed to all the portlets participating in that particular interaction. Container does not take any action if the PortletException is thrown while processing eventHandlingFailed event. Portlets can not generate and send any events while handling the event eventHandlingFailed. The portlet developer has the responsibility to take appropriate action needed.