Add SearcherManager, to manage IndexSearcher usage across threads and reopens
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Key: LUCENE-3445
URL: https://issues.apache.org/jira/browse/LUCENE-3445
Project: Lucene - Java
Issue Type: Improvement
Reporter: Michael McCandless
Assignee: Michael McCandless
Fix For: 3.5, 4.0
This is a simple helper class I wrote for Lucene in Action 2nd ed.
I'd like to commit under Lucene (contrib/misc).
It simplifies using & reopening an IndexSearcher across multiple
threads, by using IndexReader's ref counts to know when it's safe
to close the reader.
In the process I also factored out a test base class for tests that
want to make lots of simultaneous indexing and searching threads, and
fixed TestNRTThreads (core), TestNRTManager (contrib/misc) and the new
TestSearcherManager (contrib/misc) to use this base class.
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