Make readOnly setting to IndexReader.open / IndexSearcher ctor explicit
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Key: LUCENE-1659
URL: https://issues.apache.org/jira/browse/LUCENE-1659
Project: Lucene - Java
Issue Type: Improvement
Components: Index
Reporter: Michael McCandless
Assignee: Michael McCandless
Fix For: 2.9
Most apps don't need writable IndexReader, and, a readOnly IndexReader
has better concurrent performance.
I'd love to simply default readOnly to true, and you'd have to specify
"false" if you want a read/write reader (I think that's the natural
default), but that'd likely break too many back-compat cases.
So the workaround is to make the parameter explicit, in 2.9.
I think even for IndexSearcher's methods that open an IndexReader
under the hood, we should also make the parameter explicit.
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