Package org.apache.lucene.index
Interface IndexWriter.IndexReaderWarmer
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- 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
IfDirectoryReader.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.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description voidwarm(LeafReader reader)Invoked on theLeafReaderfor the newly merged segment, before that segment is made visible to near-real-time readers.
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Method Detail
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warm
void warm(LeafReader reader) throws IOException
Invoked on theLeafReaderfor the newly merged segment, before that segment is made visible to near-real-time readers.- Throws:
IOException
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