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https://issues.apache.org/jira/browse/LUCENE-1026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12576858#action_12576858
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Asgeir Frimannsson commented on LUCENE-1026:
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Is there any specific reason why this indexaccessor is limited to FSDirectory 
based indexes? I see FSDirectory.getFile() is used as a unique key in the list 
of IndexAccessors in the factory. However, it seems more natural to use 
dir.getLockID() for this purpose. Then it would be possible to use a generic 
Directory rather than the file-system specific FSDirectory.

> Provide a simple way to concurrently access a Lucene index from multiple 
> threads
> --------------------------------------------------------------------------------
>
>                 Key: LUCENE-1026
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1026
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Index, Search
>            Reporter: Mark Miller
>            Priority: Minor
>         Attachments: DefaultIndexAccessor.java, 
> DefaultMultiIndexAccessor.java, IndexAccessor-02.04.2008.zip, 
> IndexAccessor-02.07.2008.zip, IndexAccessor-02.28.2008.zip, 
> IndexAccessor-1.26.2008.zip, IndexAccessor-2.15.2008.zip, IndexAccessor.java, 
> IndexAccessor.zip, IndexAccessorFactory.java, MultiIndexAccessor.java, 
> shai-IndexAccessor-2.zip, shai-IndexAccessor.zip, shai-IndexAccessor3.zip, 
> SimpleSearchServer.java, StopWatch.java, TestIndexAccessor.java
>
>
> For building interactive indexes accessed through a network/internet 
> (multiple threads).
> This builds upon the LuceneIndexAccessor patch. That patch was not very 
> newbie friendly and did not properly handle MultiSearchers (or at the least 
> made it easy to get into trouble).
> This patch simplifies things and provides out of the box support for sharing 
> the IndexAccessors across threads. There is also a simple test class and 
> example SearchServer to get you started.
> Future revisions will be zipped.
> Works pretty solid as is, but could use the ability to warm new Searchers.

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