public IEnumerable <(string Term, T Data)> Search(string[] searchTerms, int maxHits = 100)
{
if (!_reader.IsCurrent())
{
using (_reader)
{
_reader = DirectoryReader.OpenIfChanged(_reader);
_searcher = new IndexSearcher(_reader);
}
}
MultiPhraseQuery query = new MultiPhraseQuery();
foreach (string searchTerm in searchTerms)
{
query.Add(new Term(TermsFieldName, searchTerm));
}
TopDocs hits = _searcher.Search(query, maxHits);
foreach (ScoreDoc topDoc in hits.ScoreDocs)
{
Document document = _reader.Document(topDoc.Doc);
string serializedData = document.GetField(DataFieldName).GetStringValue();
T t = _serializer.Deserialize <T>(serializedData);
string term = document.GetField(TermsFieldName).GetStringValue();
yield return(term, t);
}
}
public void RefreshReaderSearcher()
{
lock (_refreshReaderLocker)
{
if (_directoryReader == null || _directoryReader.IsCurrent())
{
return;
}
var oldReader = _directoryReader;
_directoryReader = _directoryWriter.GetReader(false);
var newSearcher = new IndexSearcher(_directoryReader);
Interlocked.Exchange(ref _indexSearcher, newSearcher);
oldReader.Dispose();
Console.WriteLine($"Index { _indexName }: Searcher updated");
}
}
