Class SearcherManager

Utility class to safely share IndexSearcher instances across multiple threads, while periodically reopening. This class ensures each searcher is disposed only once all threads have finished using it.

Use Acquire() to obtain the current searcher, and Release(G) to release it, like this:

IndexSearcher s = manager.Acquire();
try 
{
    // Do searching, doc retrieval, etc. with s
} 
finally 
{
    manager.Release(s);
    // Do not use s after this!
    s = null;
}

In addition you should periodically call MaybeRefresh(). While it's possible to call this just before running each query, this is discouraged since it penalizes the unlucky queries that do the reopen. It's better to use a separate background thread, that periodically calls MaybeRefresh(). Finally, be sure to call Dispose() once you are done.

@lucene.experimental