||This implementation of the URLManagerService is backed by a simple
map persisted on disk in a properties file
Handles fetching URLs and if for some reason anything happens add it to the
||Used for fetching URLs and adding them to the disk cache when Jetspeed is
operating in CACHE_REQUIRED mode.
||This is a simple URL information record which can be used
to track URL resources status in a persistent way.
||This is a static wrapper around the URLManagerService for easing
access to its functionalities