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https://issues.apache.org/jira/browse/LUCENE-4370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13961394#comment-13961394
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Shikhar Bhushan commented on LUCENE-4370:
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Proposal: {{LeafCollector}} (in trunk via LUCENE-5527) gets a method {{void
finish();}
Semantics: It is invoked when collection with that leaf has completed. It is
not invoked if collection does terminates due to an exception.
I know this ticket was originally about having such a method on {{Collector}}
and not at the segment-level collection, however I think all use cases can be
cleanly modelled in this manner.
As naming goes, I think {{finish()}} or {{done()}} or such is better than
{{close()}}, which implies a try-finally'esque construct.
/cc [~jpountz] [~rcmuir] [~hossman]
> Let Collector know when all docs have been collected
> ----------------------------------------------------
>
> Key: LUCENE-4370
> URL: https://issues.apache.org/jira/browse/LUCENE-4370
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/search
> Affects Versions: 4.0-BETA
> Reporter: Tomás Fernández Löbbe
> Priority: Minor
>
> Collectors are a good point for extension/customization of Lucene/Solr,
> however sometimes it's necessary to know when the last document has been
> collected (for example, for flushing cached data).
> It would be nice to have a method that gets called after the last doc has
> been collected.
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