Adrien Grand created LUCENE-5701:
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Summary: Move core closed listeners to AtomicReader
Key: LUCENE-5701
URL: https://issues.apache.org/jira/browse/LUCENE-5701
Project: Lucene - Core
Issue Type: New Feature
Reporter: Adrien Grand
Assignee: Adrien Grand
Priority: Minor
Fix For: 4.9, 5.0
Core listeners are very helpful when managing per-segment caches (filters,
uninverted doc values, etc.) yet this API is only exposed on {{SegmentReader}}.
If you want to use it today, you need to do instanceof checks, try to unwrap in
case of a FilterAtomicReader and finally fall back to a reader closed listener
if every other attempt to get the underlying SegmentReader failed.
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