Portlet API

javax.portlet.Portlet
- javax.portlet.GenericPortlet
  - PortletResponse
    - ActionResponse
    - EventResponse
    - MimeResponse, has caching configuration for portlet content
      - ResourceResponse
      - RenderResponse
  - PortletRequest
    - ClientDataRequest
      - ActionRequest
      - ResourceRequest
    - RenderRequest
    - EventRequest
EventPortlet
ResourceServingPortlet
PortletConfig
- PortletContext
- PortletSession, PortletSessionUtil, SessionStatus
- PortletRequestDispatcher
PortletMode
PortletURL and ResourceURL
PortletPreference
WindowState
CacheControl
ClientDataRequest
PortletURLGenerationListener

Portlet - Java Annotation

@RenderMode, to annotate any method name, any one of render mode.

@ProcessAction