public void Init()
{
highlightings = new Dictionary<string, Dictionary<string, string[]>>();
scoreExplanations = new Dictionary<string, string>();
Func<IndexQueryResult, object> tryRecordHighlightingAndScoreExplanation = queryResult =>
{
if (queryResult.Highligtings != null && (queryResult.Key != null || queryResult.HighlighterKey != null))
highlightings.Add(queryResult.Key ?? queryResult.HighlighterKey, queryResult.Highligtings);
if ((queryResult.Key != null || queryResult.ReduceVal != null) && queryResult.ScoreExplanation != null)
scoreExplanations.Add(queryResult.Key ?? queryResult.ReduceVal, queryResult.ScoreExplanation);
return null;
};
stale = false;
indexTimestamp = Tuple.Create(DateTime.MinValue, Etag.Empty);
resultEtag = Etag.Empty;
nonAuthoritativeInformation = false;
if (string.IsNullOrEmpty(query.ResultsTransformer) == false &&
(query.FieldsToFetch == null || query.FieldsToFetch.Length == 0))
{
query.FieldsToFetch = new[] { Constants.AllFields };
}
duration = Stopwatch.StartNew();
idsToLoad = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
var viewGenerator = database.IndexDefinitionStorage.GetViewGenerator(indexName);
var index = database.IndexDefinitionStorage.GetIndexDefinition(indexName);
if (viewGenerator == null)
throw new IndexDoesNotExistsException("Could not find index named: " + indexName);
resultEtag = database.Indexes.GetIndexEtag(index.Name, null, query.ResultsTransformer);
stale = actions.Staleness.IsIndexStale(index.IndexId, query.Cutoff, query.CutoffEtag);
if (stale == false && query.Cutoff == null && query.CutoffEtag == null)
{
var indexInstance = database.IndexStorage.GetIndexInstance(indexName);
stale = stale || (indexInstance != null && indexInstance.IsMapIndexingInProgress);
}
if (stale &&
actions.Staleness.IsIndexStaleByTask(index.IndexId, query.Cutoff) == false &&
actions.Staleness.IsReduceStale(index.IndexId) == false)
{
var forEntityNames = viewGenerator.ForEntityNames.ToList();
var lastIndexedEtag = actions.Indexing.GetIndexStats(index.IndexId).LastIndexedEtag;
if (database.LastCollectionEtags.HasEtagGreaterThan(forEntityNames, lastIndexedEtag) == false)
stale = false;
}
indexTimestamp = actions.Staleness.IndexLastUpdatedAt(index.IndexId);
var indexFailureInformation = actions.Indexing.GetFailureRate(index.IndexId);
if (indexFailureInformation.IsInvalidIndex)
{
throw new IndexDisabledException(indexFailureInformation);
}
docRetriever = new DocumentRetriever(database.Configuration, actions, database.ReadTriggers, database.InFlightTransactionalState, query.TransformerParameters, idsToLoad);
var fieldsToFetch = new FieldsToFetch(query,
viewGenerator.ReduceDefinition == null
? Constants.DocumentIdFieldName
: Constants.ReduceKeyFieldName);
Func<IndexQueryResult, bool> shouldIncludeInResults =
result => docRetriever.ShouldIncludeResultInQuery(result, index, fieldsToFetch, ShouldSkipDuplicateChecking);
var indexQueryResults = database.IndexStorage.Query(indexName, query, shouldIncludeInResults, fieldsToFetch, database.IndexQueryTriggers, cancellationToken);
indexQueryResults = new ActiveEnumerable<IndexQueryResult>(indexQueryResults);
if (query.ShowTimings)
indexQueryResults = new TimedEnumerable<IndexQueryResult>(indexQueryResults, timeInMilliseconds => executionTimes[QueryTimings.Lucene] = timeInMilliseconds);
var docs = from queryResult in indexQueryResults
let doc = docRetriever.RetrieveDocumentForQuery(queryResult, index, fieldsToFetch, ShouldSkipDuplicateChecking)
where doc != null
let _ = nonAuthoritativeInformation |= (doc.NonAuthoritativeInformation ?? false)
let __ = tryRecordHighlightingAndScoreExplanation(queryResult)
select doc;
transformerErrors = new List<string>();
results = database
.Queries
.GetQueryResults(query, viewGenerator, docRetriever, docs, transformerErrors,
timeInMilliseconds => executionTimes[QueryTimings.LoadDocuments] = timeInMilliseconds,
timeInMilliseconds => executionTimes[QueryTimings.TransformResults] = timeInMilliseconds,
query.ShowTimings, cancellationToken);
Header = new QueryHeaderInformation
{
Index = indexName,
IsStale = stale,
ResultEtag = resultEtag,
IndexTimestamp = indexTimestamp.Item1,
IndexEtag = indexTimestamp.Item2,
TotalResults = query.TotalSize.Value
};
}
public static Negotiator WithEtagAndLastModified(this Negotiator negotiator, QueryHeaderInformation stats)
{
var etag = stats.IndexEtag;
var responseLastModified = stats.IndexTimestamp;
return WithEtagAndLastModified(negotiator, etag, responseLastModified);
}
