Can you list out Request Objects in Portlets?

Render Phase:
                        Render Request
Action Phase:
                        ActionRequest

Event Processcing:
                        EventRequest

Serving Resource:
                      ResourceRequest

* They were made available to the portlet instance depending upon whether the portlet container received a render or action request for the portlet.

* PortletRequest is the superinterface of the RenderRequest, ActionRequest, ResourceRequest, and EventRequest interfaces.


* The portlet container is responsible for providing the portlet with objects implementing the RenderRequest, ActionRequest, ResourceRequest, and EventRequest interfaces, depending upon the lifecycle phase of the portlet