Package org.apache.lucene.index

Interface IndexWriter.IndexReaderWarmer

All Known Implementing Classes:
SimpleMergedSegmentWarmer
Enclosing class:
IndexWriter
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public static interface IndexWriter.IndexReaderWarmer
If DirectoryReader.open(IndexWriter) has been called (ie, this writer is in near real-time mode), then after a merge completes, this class can be invoked to warm the reader on the newly merged segment, before the merge commits. This is not required for near real-time search, but will reduce search latency on opening a new near real-time reader after a merge completes.
WARNING: This API is experimental and might change in incompatible ways in the next release.

NOTE: warm(LeafReader) is called before any deletes have been carried over to the merged segment.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    warm(LeafReader reader)
    Invoked on the LeafReader for the newly merged segment, before that segment is made visible to near-real-time readers.

  • Method Details