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https://issues.apache.org/jira/browse/LUCENE-5701?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand updated LUCENE-5701:
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Attachment: LUCENE-5701.patch
> 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
>
> Attachments: LUCENE-5701.patch
>
>
> 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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