Package org.apache.lucene.index

Class ReaderManager

java.lang.Object
org.apache.lucene.search.ReferenceManager<DirectoryReader>
org.apache.lucene.index.ReaderManager
All Implemented Interfaces:
Closeable, AutoCloseable
public final class ReaderManager extends ReferenceManager<DirectoryReader>
Utility class to safely share DirectoryReader instances across multiple threads, while periodically reopening. This class ensures each reader is closed only once all threads have finished using it.
See Also:

  • Constructor Details

    • ReaderManager

      public ReaderManager(IndexWriter writer, boolean applyAllDeletes) throws IOException
      Creates and returns a new ReaderManager from the given IndexWriter.
      Parameters:
      writer - the IndexWriter to open the IndexReader from.
      applyAllDeletes - If true, all buffered deletes will be applied (made visible) in the IndexSearcher / DirectoryReader. If false, the deletes may or may not be applied, but remain buffered (in IndexWriter) so that they will be applied in the future. Applying deletes can be costly, so if your app can tolerate deleted documents being returned you might gain some performance by passing false. See DirectoryReader.openIfChanged(DirectoryReader, IndexWriter, boolean).
      Throws:
      IOException - If there is a low-level I/O error

    • ReaderManager

      public ReaderManager(Directory dir) throws IOException
      Creates and returns a new ReaderManager from the given Directory.
      Parameters:
      dir - the directory to open the DirectoryReader on.
      Throws:
      IOException - If there is a low-level I/O error