class org.apache.derby.impl.services.cache.CachedItem
class org.apache.derby.impl.services.cache.CacheStat
class org.apache.derby.impl.services.cache.ClockFactory (implements org.apache.derby.iapi.services.cache.CacheFactory)
class java.util.Dictionary
class java.util.Hashtable (implements java.lang.Cloneable, java.util.Map, java.io.Serializable)
class org.apache.derby.impl.services.cache.Clock (implements org.apache.derby.iapi.services.cache.CacheManager, org.apache.derby.iapi.services.daemon.Serviceable)