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https://issues.apache.org/jira/browse/LUCENE-3061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13027627#comment-13027627
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Shai Erera commented on LUCENE-3061:
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I don't think they are experimental though -- they exist for ages. We only made
them public.
I get your point - you don't think we should commit to this API signature, but
IMO we should -- if MS is a valid extension point by applications, we must
support this API, otherwise MS cannot be extended at all. Also, getNextMerge()
jdoc specifies "Expert: the MergeScheeduler calls this method ..." - this kind
of makes this API public long time ago, only it wasn't.
> Open IndexWriter API to allow custom MergeScheduler implementation
> ------------------------------------------------------------------
>
> Key: LUCENE-3061
> URL: https://issues.apache.org/jira/browse/LUCENE-3061
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Reporter: Shai Erera
> Assignee: Shai Erera
> Priority: Minor
> Fix For: 3.2, 4.0
>
> Attachments: LUCENE-3061.patch, LUCENE-3061.patch
>
>
> IndexWriter's getNextMerge() and merge(OneMerge) are package-private, which
> makes it impossible for someone to implement his own MergeScheduler. We
> should open up these API, as well as any other that can be useful for custom
> MS implementations.
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