Boa noite!
Alguém conhece algum motor de busca open source. Gostaria de aprender sobre isso.
http://lucene.apache.org/java/docs/
Apache Lucene is a high-performance, full-featured text search engine library written entirely in Java. It is a technology suitable for nearly any application that requires full-text search, especially cross-platform.
Agradeço a dica rogelgarcia.