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https://issues.apache.org/jira/browse/LUCENE-3552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13142082#comment-13142082
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Dafna Sheinwald commented on LUCENE-3552:
-----------------------------------------
Hi Shai,
Yes, the old (already forgotten) DB implementation of taxonomy index, and the
subsequent Lucene implementation gave rise to the definition of
TaxonomyReader/Writer interface. Currently, indeed, and we are left with Lucene
(Directory) implementation only. But I thought that as the interface is already
there, and we have some thoughts of yet another implementation of taxonomy
index (and hence TaxonomyReader/Writer), as part of the Lucene search index,
which may help to ease the burden of synch between these two indices, why not
let the interface live a bit longer before we remove it. Regards, Dafna.
> TaxonomyReader/Writer and their Lucene* implementation
> ------------------------------------------------------
>
> Key: LUCENE-3552
> URL: https://issues.apache.org/jira/browse/LUCENE-3552
> Project: Lucene - Java
> Issue Type: Improvement
> Components: modules/facet
> Reporter: Shai Erera
> Assignee: Shai Erera
> Priority: Trivial
> Fix For: 3.5, 4.0
>
>
> The facet module contains two interfaces TaxonomyWriter and TaxonomyReader,
> with two implementations Lucene*. We've never actually implemented two
> TaxonomyWriters/Readers, so I'm not sure if these interfaces are useful
> anymore. Therefore I'd like to propose that we do either of the following:
> # Remove the interfaces and remove the Lucene part from the implementation
> classes (to end up with TW/TR impls). Or,
> # Keep the interfaces, but rename the Lucene* impls to Directory*.
> Whatever we do, I'd like to make the impls/interfaces impl also
> TwoPhaseCommit.
> Any preferences?
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