| Interface | Description | 
|---|---|
| AuthoritativeTier<K,V> | Authoritative tier, that is the lower most tier of a multi tiered store. | 
| AuthoritativeTier.InvalidationValve | Invalidation valve, that is the mechanism through which an  AuthoritativeTiercan request invalidations
 from theCachingTier. | 
| AuthoritativeTier.Provider | Serviceinterface for providingAuthoritativeTierinstances. | 
| CachingTier<K,V> | Caching tier is the abstraction for tiers sitting atop the  AuthoritativeTier. | 
| CachingTier.InvalidationListener<K,V> | Caching tier invalidation listener. | 
| CachingTier.Provider | Serviceinterface for providingCachingTierinstances. | 
| HigherCachingTier<K,V> | Interface for the higher tier of a multi-tier  CachingTier. | 
| HigherCachingTier.Provider | Serviceinterface for providingHigherCachingTierinstances. | 
| LowerCachingTier<K,V> | Interface for the lower tier of a multi-tier  CachingTier. | 
| LowerCachingTier.Provider | Serviceinterface for providingLowerCachingTierinstances. |