Hibernate Search

Project Lead:	Emmanuel Bernard
Latest release:	3.1.0 Beta1 (Changelog) (Road Map)
Release date:	17.07.2008
Requirements:	Hibernate Core 3.3, JDK 5.0
Documentation:	Reference, Javadoc, FAQ and Migration Guide

Hibernate Search brings the power of full text search engines to the persistence domain model and Hibernate experience, through transparent configuration (Hibernate Annotations) and a common API.

Full text search engines like Apache Lucene(tm) allow applications to execute free-text search queries. However, it becomes increasingly more difficult to index a more complex object domain model - keeping the index up to date, dealing with the mismatch between the index structure and the domain model, querying mismatches, and so on.

Hibernate Search abstracts you from these problems by solving:

• The structural mismatch: Hibernate Search takes care of the object/index translation

• The duplication mismatch: Hibernate Search manages the index, keeps changes synchronized with your database, and optimizes the index access transparently

• The API mismatch: Hibernate Search lets you query the index and retrieve managed objects as any regluar Hibernate query would do

Hibernate Search is using Apache Lucene(tm) internally, and always provides the ability to fallback to the native Lucene APIs.

Depending on application needs, Hibernate Search works well in non-clustered and clustered mode, provides synchronous index updates and asynchronous index updates, letting you choose between response time, throughput and index update.

Last but not least, Hibernate Search works perfectly with all traditional Hibernate patterns, especially the long (atomic) conversation pattern used by JBoss Seam.