Hibernate Search transparently indexes your objects and offers fast regular, full-text and geolocation search. Ease of use and easy clustering are core.
Offers full-text search support for objects stored by Hibernate ORM, Infinispan and other sources. Think of it as Google(tm) for your entities:
search words with text
order results by relevance
find by approximation (fuzzy search)
Clustering indexes is not trivial. Hibernate Search offers several easy to setup clustering strategies:
master / slaves
JMS / JGroups replication
Infinispan distributed index
Geolocalized entities are as easy as @Spatial. Filter results around a certain location liek the user position. Hibernate Search offers to algorithms: a light one or a more scalable one.
Faceting categorizes results by properties like price range or brand.
Design to be easy to use from the ground up. Handles indexing, datastore synchronization, clustering and infrastructure transparently while you focus on the business sense of your queries.