[jira] [Updated] (LUCENE-4695) Add utility class for getting live values for a given field during NRT indexing

["Michael McCandless (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-4695?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael McCandless updated LUCENE-4695:
---------------------------------------

    Issue Type: Improvement  (was: Bug)
    
> 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
>
>
> 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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