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https://issues.apache.org/jira/browse/LUCENE-112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12630203#action_12630203
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Mark Miller commented on LUCENE-112:
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This is pretty old (2003) and seems unlikely to go any further. Anyone object
to closing this?
> [PATCH] Add an IndexReader implementation that frees resources when idle and
> refreshes itself when stale
> --------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-112
> URL: https://issues.apache.org/jira/browse/LUCENE-112
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Affects Versions: CVS Nightly - Specify date in submission
> Environment: Operating System: All
> Platform: All
> Reporter: Eric Isakson
> Priority: Minor
> Attachments: IdleTimeoutRefreshingIndexReader.html,
> IdleTimeoutRefreshingIndexReader.java
>
>
> Here is a little something I worked on this weekend that I wanted to
> contribute
> back as I think others might find it very useful.
> I extended IndexReader and added support for configuring an idle timeout and
> refresh interval.
> It uses a monitoring thread to watch for the reader going idle. When the
> reader
> goes idle it is closed. When the index is read again it is re-opened.
> It uses another thread to periodically check when the reader needs to be
> refreshed due to a change to index. When the reader is stale, it closes the
> reader and reopens the index.
> It is acually delegating all the work to another IndexReader implementation
> and
> just handling the threading and synchronization. When it closes a reader, it
> delegates the close to another thread that waits a bit (configurable how
> long)
> before actually closing the reader it was delegating to. This gives any
> consumers of the original reader a chance to finish up their last action on
> the
> reader.
> This implementation sacrifices a little bit of speed since there is a bit
> more
> synchroniztion to deal with and the delegation model puts extra calls on the
> stack, but it should provide long running applications that have idle periods
> or frequently changing indices from having to open and close readers all the
> time or hold open unused resources.
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