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From "Martijn van Groningen (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-3360) Move FieldCache to IndexReader
Date Thu, 23 Feb 2012 08:59:49 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-3360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13214473#comment-13214473
] 

Martijn van Groningen commented on LUCENE-3360:
-----------------------------------------------

Hi Ryan! Yeah, a lot has changed since the last patch. This issue is on my task list, however
so are other issues. I was planning to pick this in the coming weeks. If you have time now
it would be great to continue the work on this issue now. To sooner we get rid of the FieldCache#DEFAULT
the better!
                
> Move FieldCache to IndexReader
> ------------------------------
>
>                 Key: LUCENE-3360
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3360
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Martijn van Groningen
>             Fix For: 3.6, 4.0
>
>         Attachments: LUCENE-3360-3x.patch, LUCENE-3360-3x.patch, LUCENE-3360-3x.patch,
LUCENE-3360.patch, LUCENE-3360.patch, LUCENE-3360.patch, LUCENE-3360.patch, LUCENE-3360.patch,
LUCENE-3360.patch, LUCENE-3360.patch
>
>
> Move the static FieldCache.DEFAULT field instance to atomic IndexReaders, so that FieldCache
insanity caused by the WeakHashMap no longer occurs.
> * Add a new method to IndexReader that by default throws an UOE:
> {code}public FieldCache getFieldCache(){code}
> * The SegmentReader implements this method and returns its own internal FieldCache implementation.
This implementation just uses a HashMap<Entry<T>,Object>> to store entries.
> * The SlowMultiReaderWrapper implements this method as well and basically behaves the
same as the current FieldCacheImpl.
> This issue won't solve the insanity that comes from inconsistent usage of a single field
(for example retrieve both int[] and DocTermIndex for the same field). 

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