Create SearcherTaxoManager
--------------------------
Key: LUCENE-3786
URL: https://issues.apache.org/jira/browse/LUCENE-3786
Project: Lucene - Java
Issue Type: New Feature
Components: modules/facet
Reporter: Shai Erera
Assignee: Shai Erera
Priority: Minor
Fix For: 3.6, 4.0
If an application wants to use an IndexSearcher and TaxonomyReader in a
SearcherManager-like fashion, it cannot use a separate SearcherManager, and say
a TaxonomyReaderManager, because the IndexSearcher and TaxoReader instances
need to be in sync. That is, the IS-TR pair must match, or otherwise the
category ordinals that are encoded in the search index might not match the ones
in the taxonomy index.
This can happen if someone reopens the IndexSearcher's IndexReader, but does
not refresh the TaxonomyReader, and the category ordinals that exist in the
reopened IndexReader are not yet visible to the TaxonomyReader instance.
I'd like to create a SearcherTaxoManager (which is a ReferenceManager) which
manages an IndexSearcher and TaxonomyReader pair. Then an application will call:
{code}
SearcherTaxoPair pair = manager.acquire();
try {
IndexSearcher searcher = pair.searcher;
TaxonomyReader taxoReader = pair.taxoReader;
// do something with them
} finally {
manager.release(pair);
pair = null;
}
{code}
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