org.apache.lucene.search

Class SearcherFactory

java.lang.Object

org.apache.lucene.search.SearcherFactory

public class SearcherFactory
extends Object

Factory class used by SearcherManager and NRTManager to create new IndexSearchers. The default implementation just creates an IndexSearcher with no custom behavior:

   public IndexSearcher newSearcher(IndexReader r) throws IOException {
     return new IndexSearcher(r);
   }
 

You can pass your own factory instead if you want custom behavior, such as:

• Setting a custom scoring model: IndexSearcher.setSimilarity(Similarity)
• Parallel per-segment search: IndexSearcher.IndexSearcher(IndexReader, ExecutorService)
• Return custom subclasses of IndexSearcher (for example that implement distributed scoring)
• Run queries to warm your IndexSearcher before it is used. Note: when using near-realtime search you may want to also IndexWriterConfig.setMergedSegmentWarmer(IndexWriter.IndexReaderWarmer) to warm newly merged segments in the background, outside of the reopen path.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Constructor Summary

Constructors

Constructor and Description
SearcherFactory()

Method Summary

Methods

Modifier and Type	Method and Description
IndexSearcher	newSearcher(IndexReader reader) Returns a new IndexSearcher over the given reader.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SearcherFactory

public SearcherFactory()

Method Detail

newSearcher

public IndexSearcher newSearcher(IndexReader reader)
                          throws IOException

Returns a new IndexSearcher over the given reader.

Throws:

IOException