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https://issues.apache.org/jira/browse/LUCENE-3769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13205635#comment-13205635
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Simon Willnauer commented on LUCENE-3769:
-----------------------------------------

bq. Hmm, but the example you raised will be addressed by LUCENE-3761, right? Ie 
at that point, both SM and NRTM are ThingyManager<IndexSearcher>?

I think NRTM should delegate rather than subclass. It serves two different 
purposes and we shouldn't try to couple tight if not needed.
                
> Simplify NRTManager
> -------------------
>
>                 Key: LUCENE-3769
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3769
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: core/search
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 3.6, 4.0
>
>         Attachments: LUCENE-3769.patch
>
>
> NRTManager is hairy now, because the applyDeletes is separately passed
> to ctor, passed to maybeReopen, passed to getSearcherManager, etc.
> I think, instead, you should pass it only to the ctor, and if you have
> some cases needing deletes and others not then you can make two
> NRTManagers.  This should be no less efficient than we have today,
> just simpler.
> I think it will also enable NRTManager to subclass ThingyManager
> (LUCENE-3761).

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