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I want to search with Lucene on an index. The index is changed frequently. So I need to do something to search and index at the same time. It's a web application on Tomcat. And I want to use RAMDeirectory to increase the searching speed. I don't know how to do it!
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Simply put, Lucene uses an “inverted indexing” of data – instead of mapping pages to keywords, it maps keywords to pages just like a glossary at the end of any book. This allows for faster search responses, as it searches through an index, instead of searching through text directly.
Why is Lucene faster? Lucene is very fast at searching for data because of its inverted index technique. Normally, datasources structure the data as an object or record, which in turn have fields and values.
First written in 1999 by Doug Cutting, still going strong... Apache Lucene, the full-text search library, has operated and been maintained for more than 20 years and for many developers is an integral part of their website and application builds.
NRTManager in the misc Lucene package provides the ability to search and index at the same time.
TrackingIndexWriter writer; // your writer
SearcherFactory factory = new SearcherFactory();
NRTManager mgr = new NRTManager(writer, factory);
Check NRTManager methods for more info.
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