Interface for a cache factory that returns a cache that externally acts like a map.
Underlying caches don't have to be a map, but they must be wrapped in the map interface
if they do not.
author: Scott Battaglia version: $Revision: 36682 $ $Date: 2006-08-23 12:56:56 -0700 (Wed, 23 Aug 2006) $
Method to retrieve a cache by name.
Parameters: cacheName - the name of the cache to retrieve. the cache that is referenced by the cache name provided. throws: IllegalArgumentException - if a cache by that name cannot be retrieved.