Package org.apache.lucene.search

Class SearcherFactory

java.lang.Object

org.apache.lucene.search.SearcherFactory

public class SearcherFactory
extends java.lang.Object

Factory class used by SearcherManager 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(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.

Constructor Summary

Constructors

Constructor	Description
SearcherFactory()

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

SearcherFactory

public SearcherFactory()

Method Detail

newSearcher

public IndexSearcher newSearcher(IndexReader reader)
                          throws java.io.IOException

Returns a new IndexSearcher over the given reader.

Throws:

java.io.IOException