The ActionRequest represents the request sent to the portlet
to handle an action.
The ActionResponse interface represents the portlet
response to an action request.
The PortalContext interface gives the portlet
the ability to retrieve information about the portal calling this portlet.
The Portlet interface is used by the portlet container to
invoke the portlets.
The PortletConfig interface provides the portlet with
its configuration.
The PortletContext interface defines a portlet view
of the portlet container.
The PortletException class defines a general exception
that a portlet can throw when it is unable to perform its operation
successfully.
The PortletMode class represents
the possible modes that a portlet can assume.
The PortletModeException is thrown when a portlet
tries to use or set a portlet mode that is not supported by the current
runtime environment or the portlet.
The PortletPreferences interface allows the portlet to store
configuration data.
The PortletRequest defines the base interface to provide client
request information to a portlet.
The PortletRequestDispatcher interface
defines an object that receives requests from the client
and sends them to the specified resources (such as a servlet,
HTML file, or JSP file) on the server.
The PortletResponse defines the base interface to assist a
portlet in creating and sending a response to the client.
A portlet should throw a PortletSecurityException
when a call fails because of security reasons.
Additionally it can be thrown by the portal/portlet-container.
The PortletSession interface provides a way to identify a user
across more than one request and to store transient information about that user.
The PortletURL interface represents a URL
that reference the portlet itself.
The ReadOnlyException is thrown when a portlet tries
to change the value for a read-only preference attribute.
The RenderRequest represents the request sent to the portlet
to handle a render.
The RenderResponse defines an object to assist a portlet in
sending a response to the portal.
The ValidatorException is thrown by the
validate method of a PreferencesValidator when
the validation of a preference failed.
The WindowState class represents
the possible window states that a portlet window can assume.
The WindowStateException is thrown when a portlet
tries to use a window state that is not supported by the current
runtime environment or the portlet.