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From "Michael McCandless (JIRA)" <>
Subject [jira] Commented: (LUCENE-2837) Collapse Searcher/Searchable/IndexSearcher; remove contrib/remote; merge PMS into IndexSearcher
Date Wed, 05 Jan 2011 17:58:46 GMT


Michael McCandless commented on LUCENE-2837:

I agree we should fix 3.x, too.

Also I didn't fix all the jdocs that reference Searcher/Searchable!

I'll reopen...

> Collapse Searcher/Searchable/IndexSearcher; remove contrib/remote; merge PMS into IndexSearcher
> -----------------------------------------------------------------------------------------------
>                 Key: LUCENE-2837
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>            Reporter: Michael McCandless
>             Fix For: 3.1, 4.0
>         Attachments: LUCENE-2837.patch, LUCENE-2837.patch
> We've discussed cleaning up our *Searcher stack for some time... I
> think we should try to do this before releasing 4.0.
> So I'm attaching an initial patch which:
>   * Removes Searcher, Searchable, absorbing all their methods into IndexSearcher
>   * Removes contrib/remote
>   * Removes MultiSearcher
>   * Absorbs ParallelMultiSearcher into IndexSearcher (ie you can now
>     pass useThreads=true, or a custom ES to the ctor)
> The patch is rough -- I just ripped stuff out, did search/replace to
> IndexSearcher, etc.  EG nothing is directly testing using threads with
> IndexSearcher, but before committing I think we should add a
> newSearcher to LuceneTestCase, which randomly chooses whether the
> searcher uses threads, and cutover tests to use this instead of making
> their own IndexSearcher.
> I think MultiSearcher has a useful purpose, but as it is today it's
> too low-level, eg it shouldn't be involved in rewriting queries: the
> Query.combine method is scary.  Maybe in its place we make a higher
> level class, with limited API, that's able to federate search across
> multiple IndexSearchers?  It'd also be able to optionally use thread
> per IndexSearcher.

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