Now all your HttpSessionListeners that need to get the current ExoContainer must extends org.exoplatform.container.web.AbstractHttpSessionListener. This abstract class will give you the current ExoContainer directly in the signature of the methods to implement which are _ onSessionCreated(ExoContainer container, HttpSessionEvent event)\_ and onSessionDestroyed(ExoContainer container, HttpSessionEvent event)

You will also need to implement the method called requirePortalEnvironment() that is used to indicate that we would like the abstract class to setup or not the full portal environment ( PortalContainer and ClassLoader) before processing the event. This value should return true when the event is processed within the web application of a portal container.