what are different types of URLs?

There are three different types of portlet URLs:

■ Render URL—Used to ask a portlet instance to generate markup (like HTML,
XML, WML) based on its current state. The request sent to the portlet by a render
URL is referred to as a render request.

■ Action URL—Used for action processing, which results in a state change on the
server. The request sent to the portlet by an action URL is referred to as an
action request.

■ Resource URL—Used to render content or retrieve resources (like image files).
Depending upon the application requirement, a resource URL may be used for
updating application state. The request sent to the portlet by a resource URL is
referred to as a resource request.


Portlets don’t have an event URL type for sending event requests