public JArray GetDocuments(int start, int pageSize, Guid? etag)
{
var list = new JArray();
TransactionalStorage.Batch(actions =>
{
IEnumerable<JsonDocument> documents;
if (etag == null)
documents = actions.Documents.GetDocumentsByReverseUpdateOrder(start);
else
documents = actions.Documents.GetDocumentsAfter(etag.Value);
var documentRetriever = new DocumentRetriever(actions, ReadTriggers);
foreach (var doc in documents.Take(pageSize))
{
var document = documentRetriever.ExecuteReadTriggers(doc, null,
// here we want to have the Load semantic, not Query, because we need this to be
// as close as possible to the full database contents
ReadOperation.Load);
if (document == null)
continue;
if (document.Metadata.Property("@id") == null)
document.Metadata.Add("@id", new JValue(doc.Key));
list.Add(document.ToJson());
}
});
return list;
}
public JArray GetDocuments(int start, int pageSize, Guid? etag)
{
var list = new JArray();
TransactionalStorage.Batch(actions =>
{
IEnumerable<JsonDocument> documents;
if (etag == null)
documents = actions.Documents.GetDocumentsByReverseUpdateOrder(start);
else
documents = actions.Documents.GetDocumentsAfter(etag.Value);
var documentRetriever = new DocumentRetriever(actions, ReadTriggers);
foreach (var doc in documents.Take(pageSize))
{
var document = documentRetriever.ExecuteReadTriggers(doc, null, ReadOperation.Query);
if (document == null)
continue;
if (document.Metadata.Property("@id") == null)
document.Metadata.Add("@id", new JValue(doc.Key));
list.Add(document.ToJson());
}
});
return list;
}
public QueryResult Query(string index, IndexQuery query)
{
var list = new List<JObject>();
var stale = false;
DateTime indexTimestamp = DateTime.MinValue;
TransactionalStorage.Batch(
actions =>
{
string entityName = null;
var abstractViewGenerator = IndexDefinitionStorage.GetViewGenerator(index);
if (abstractViewGenerator != null)
entityName = abstractViewGenerator.ForEntityName;
stale = actions.Staleness.IsIndexStale(index, query.Cutoff, entityName);
indexTimestamp = actions.Staleness.IndexLastUpdatedAt(index);
var indexFailureInformation = actions.Indexing.GetFailureRate(index);
if (indexFailureInformation.IsInvalidIndex)
{
throw new IndexDisabledException(indexFailureInformation);
}
var docRetriever = new DocumentRetriever(actions, ReadTriggers);
var collection = from queryResult in IndexStorage.Query(index, query, result => docRetriever.ShouldIncludeResultInQuery(result, query.FieldsToFetch))
select docRetriever.RetrieveDocumentForQuery(queryResult, query.FieldsToFetch)
into doc
where doc != null
select doc;
var transformerErrors = new List<string>();
IEnumerable<JObject> results;
if (abstractViewGenerator != null &&
abstractViewGenerator.TransformResultsDefinition != null)
{
var robustEnumerator = new RobustEnumerator
{
OnError =
(exception, o) =>
transformerErrors.Add(string.Format("Doc '{0}', Error: {1}", Index.TryGetDocKey(o),
exception.Message))
};
results =
robustEnumerator.RobustEnumeration(
collection.Select(x => new DynamicJsonObject(x.ToJson())),
source => abstractViewGenerator.TransformResultsDefinition(docRetriever, source))
.Select(JsonExtensions.ToJObject);
}
else
{
results = collection.Select(x => x.ToJson());
}
list.AddRange(results);
if(transformerErrors.Count>0)
{
throw new InvalidOperationException("The transform results function failed.\r\n" + string.Join("\r\n", transformerErrors));
}
});
return new QueryResult
{
Results = list,
IsStale = stale,
SkippedResults = query.SkippedResults.Value,
TotalResults = query.TotalSize.Value,
IndexTimestamp = indexTimestamp
};
}
public QueryResult Query(string index, IndexQuery query)
{
var list = new List<JObject>();
var stale = false;
TransactionalStorage.Batch(
actions =>
{
string entityName = null;
var abstractViewGenerator = IndexDefinitionStorage.GetViewGenerator(index);
if (abstractViewGenerator != null)
entityName = abstractViewGenerator.ForEntityName;
stale = actions.Tasks.IsIndexStale(index, query.Cutoff, entityName);
var indexFailureInformation = actions.Indexing.GetFailureRate(index);
if (indexFailureInformation.IsInvalidIndex)
{
throw new IndexDisabledException(indexFailureInformation);
}
var docRetriever = new DocumentRetriever(actions, ReadTriggers);
var collection = from queryResult in IndexStorage.Query(index, query, docRetriever.ShouldIncludeResultInQuery)
select docRetriever.RetrieveDocumentForQuery(queryResult)
into doc
where doc != null
select doc.ToJson();
list.AddRange(collection);
});
return new QueryResult
{
Results = list,
IsStale = stale,
SkippedResults = query.SkippedResults.Value,
TotalResults = query.TotalSize.Value
};
}