Portlets form a design pattern where a Portal servlet combines one
or more component Portlets into a web page. Because the portlets
are written as components, they can be cleanly written and tested.
Applications which currently use many servlet includes might be more cleanly
written as portlet applications.
The Portal part of the pattern is a servlet which manages the
portlets. In the Hello World example, the servlet is a simple "invoker" which
calls a single portlet to render the page. Many applications will
write their own Portal servlets, using Resin's generic portal
library to handle the Portlet API.
This implementation is currently in development, API's may change
somewhat and some functionality has not yet been implemented.
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