Package org.apache.lucene.index

Interface MergePolicy.MergeContext

All Known Implementing Classes:

IndexWriter

Enclosing class:

MergePolicy

public static interface MergePolicy.MergeContext

This interface represents the current context of the merge selection process. It allows to access real-time information like the currently merging segments or how many deletes a segment would claim back if merged. This context might be stateful and change during the execution of a merge policy's selection processes.

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

Method Summary

Modifier and Type	Method	Description
InfoStream	getInfoStream()	Returns the info stream that can be used to log messages
Set<SegmentCommitInfo>	getMergingSegments()	Returns an unmodifiable set of segments that are currently merging.
int	numDeletedDocs(SegmentCommitInfo info)	Returns the number of deleted documents in the given segments.
int	numDeletesToMerge(SegmentCommitInfo info)	Returns the number of deletes a merge would claim back if the given segment is merged.

Method Details

numDeletesToMerge

int numDeletesToMerge(SegmentCommitInfo info)
               throws IOException

Returns the number of deletes a merge would claim back if the given segment is merged.

Parameters:

info - the segment to get the number of deletes for

Throws:

IOException

See Also:

• MergePolicy.numDeletesToMerge(SegmentCommitInfo, int, org.apache.lucene.util.IOSupplier)

numDeletedDocs

int numDeletedDocs(SegmentCommitInfo info)

Returns the number of deleted documents in the given segments.

getInfoStream

InfoStream getInfoStream()

Returns the info stream that can be used to log messages

getMergingSegments

Set<SegmentCommitInfo> getMergingSegments()

Returns an unmodifiable set of segments that are currently merging.