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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-743) IndexReader.reopen()
Date Thu, 18 Oct 2007 16:55:51 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12535970
] 

Yonik Seeley commented on LUCENE-743:
-------------------------------------

{quote}
A reader which is being used for deletes or setting norms is always current (it owns the write
lock), so there should never be the need to re-open such a reader.
{quote}

I was thinking about the "add some docs" then "delete some docs" scenario:
One currently needs to close() the deleting reader to open an IndexWriter.  If IndexReader.commit()
was public, then one could simply flush changes, and then call reopen() after the IndexWriter
was done adding new documents.  But perhaps longer term, all deletions should be done via
the IndexWriter anyway.

{quote}
if you re-open an existing reader which was not used for deletes before and use the new instance
(b) to perform deletes
{quote}

Ah, thanks for that clarification.  I guess that should remain undefined.


> IndexReader.reopen()
> --------------------
>
>                 Key: LUCENE-743
>                 URL: https://issues.apache.org/jira/browse/LUCENE-743
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>            Reporter: Otis Gospodnetic
>            Assignee: Michael Busch
>            Priority: Minor
>             Fix For: 2.3
>
>         Attachments: IndexReaderUtils.java, lucene-743-take2.patch, lucene-743.patch,
lucene-743.patch, lucene-743.patch, MyMultiReader.java, MySegmentReader.java, varient-no-isCloneSupported.BROKEN.patch
>
>
> This is Robert Engels' implementation of IndexReader.reopen() functionality, as a set
of 3 new classes (this was easier for him to implement, but should probably be folded into
the core, if this looks good).

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