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When a user runs a search in Solr, the search query is processed by a request handler. SolrRequestHandler is a Solr Plugin, which illustrates the logic to be executed for any request.Solrconfig.xml file comprises several handlers (containing a number of instances of the same SolrRequestHandler class having different configurations).
Supported by Apache Software Foundation, Apache Lucene is a free, open-source, high-performance text search engine library written in Java by Doug Cutting. Lucence facilitates full-featured searching, highlighting, indexing and spellchecking of documents in various formats like MS Office docs, HTML, PDF, text docs and others.
- Allows Scalable, high performance indexing Near real-time indexing
- Standards-based open interfaces like XML, JSON and HTTP
- Flexible and adaptable faceting
- Advanced and Accurate full-text search
- Linearly scalable, auto index replication, auto failover and recovery
- Allows concurrent searching and updating
- Comprehensive HTML administration interfaces
- Provides cross-platform solutions that are index-compatible
Apache Solr is a standalone full-text search platform to perform searches on multiple websites and index documents using XML and HTTP. Built on a Java Library called Lucence, Solr supports a rich schema specification for a wide range and offers flexibility in dealing with different document fields. It also consists of an extensive search plugin API for developing custom search behavior.
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