Using Jetspeed Search Engine
Jetspeed-2 SearchEngine exposes a search operation returning SearchResults.
The SearchResult can be iterated through to display the result of the search.
Portlet Search
Jetspeed-2 SearchEngine is used by the PortletApplicationBrowser portlet to search
and retrieve portlet according to a given criteria.

Performing a search for "security" returns all the matching portlets and portlet definitions.