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https://issues.apache.org/jira/browse/LUCENE-4695?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13563071#comment-13563071
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Commit Tag Bot commented on LUCENE-4695:
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[branch_4x commit] Michael McCandless
http://svn.apache.org/viewvc?view=revision&revision=1438731
LUCENE-4695: add LiveFieldValues, to get current (live/real-time) values for
fields indexed after the last NRT reopen
> Add utility class for getting live values for a given field during NRT
> indexing
> -------------------------------------------------------------------------------
>
> Key: LUCENE-4695
> URL: https://issues.apache.org/jira/browse/LUCENE-4695
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 4.2, 5.0
>
> Attachments: LUCENE-4695.patch, LUCENE-4695.patch
>
>
> This is a simple utility/wrapper class, that holds the field
> values for recently indexed documents until the NRT reader has
> refreshed, and exposes a "get" API to get the last indexed value per
> id.
> For example one could use this to look up the "version" field for a
> given id, even when that id was just indexed and not yet visible in
> the NRT reader.
> The implementation is fairly simple: it just watches the gen coming
> out of NRTManager and updates/prunes accordingly.
> The class is abstract: you must subclass it and impl the lookupFromSearcher
> method...
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