[jira] [Commented] (LUCENE-5701) Move core closed listeners to AtomicReader

["Robert Muir (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-5701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14007180#comment-14007180 ] 

Robert Muir commented on LUCENE-5701:
-------------------------------------

+1

> 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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