/// <summary>
/// Start scroll of documents that matches search criteria.
/// </summary>
/// <param name="type">Type name.</param>
/// <param name="filter">Filter for species observations.</param>
/// <param name="scroll">Information about the scroll.</param>
/// <param name="response">Response from a scroll request to Elasticsearch.</param>
/// <returns>The first set of species observation.</returns>
public DocumentFilterResponse StartScroll(String type,
String filter,
ElasticsearchScroll scroll)
{
ElasticsearchResponse <DynamicResponse> response;
StringBuilder scrollInformation;
DocumentFilterResponse documentFilterResponse;
Int32 startIndex, stopIndex;
String maxScore, shardInformation, documentCount;
String[] splitShardInformation;
scrollInformation = new StringBuilder();
scrollInformation.Append("{");
scrollInformation.Append("\"size\" : 10000");
scrollInformation.Append(", \"_source\" : {\"include\": [\"DarwinCore_Id\"]}");
//scrollInformation.Append(", \"_source\" : {\"include\": [\"DarwinCore_Id\", \"Taxon_DyntaxaTaxonID\", \"Taxon_Species_TaxonId\"]}");
// scrollInformation.Append(", \"filter\": { \"terms\": { \"Taxon_Species_TaxonId\":[1]}}");
scrollInformation.Append(", \"sort\" : [\"_doc\"]");
scrollInformation.Append("}");
response = _client.Search <DynamicResponse>(IndexName, type, scrollInformation.ToString(), s => s.Scroll(new TimeSpan(0, scroll.KeepAlive, 0)));
CheckResponse(response);
scroll.ScrollId = (String)(response.Body.Values.ElementAt(0));
documentFilterResponse = new DocumentFilterResponse();
if (response.Body.IsNotNull())
{
documentFilterResponse.ElapsedTime = (Int32)(response.Body.Values.ElementAt(1));
// Get shard information.
shardInformation = (String)(response.Body.Values.ElementAt(3));
splitShardInformation = shardInformation.Split(':');
documentFilterResponse.ShardTotalCount = splitShardInformation[1].Substring(0, splitShardInformation[1].IndexOf(',')).WebParseInt32();
documentFilterResponse.ShardSuccessfulCount = splitShardInformation[2].Substring(0, splitShardInformation[2].IndexOf(',')).WebParseInt32();
if (documentFilterResponse.ShardSuccessfulCount == documentFilterResponse.ShardTotalCount)
{
documentFilterResponse.ShardFailedCount = splitShardInformation[3].Substring(0, splitShardInformation[3].IndexOf('}')).WebParseInt32();
}
else
{
documentFilterResponse.ShardFailedCount = splitShardInformation[3].Substring(0, splitShardInformation[3].IndexOf(',')).WebParseInt32();
}
documentFilterResponse.DocumentCount = 0;
documentFilterResponse.DocumentsJson = (String)(response.Body.Values.ElementAt(4));
documentFilterResponse.TimedOut = (Boolean)(response.Body.Values.ElementAt(2));
if (!documentFilterResponse.TimedOut)
{
// Get species observation count.
startIndex = documentFilterResponse.DocumentsJson.IndexOf(':') + 1;
stopIndex = documentFilterResponse.DocumentsJson.IndexOf(',');
documentCount = documentFilterResponse.DocumentsJson.Substring(startIndex, stopIndex - startIndex);
documentFilterResponse.DocumentCount = documentCount.WebParseInt64();
startIndex = stopIndex + 1;
if (documentFilterResponse.DocumentCount > 0)
{
// Get max score
startIndex = documentFilterResponse.DocumentsJson.IndexOf(':', startIndex) + 1;
stopIndex = documentFilterResponse.DocumentsJson.IndexOf(',', startIndex);
maxScore = documentFilterResponse.DocumentsJson.Substring(startIndex, stopIndex - startIndex);
if (maxScore != "null")
{
documentFilterResponse.MaxScore = maxScore.WebParseDouble();
}
}
}
}
return(documentFilterResponse);
}
/// <summary>
/// Get documents from a started scroll.
/// </summary>
/// <param name="scroll">Information about the scroll.</param>
public DocumentFilterResponse GetScroll(ElasticsearchScroll scroll)
{
DocumentFilterResponse documentFilterResponse;
ElasticsearchResponse <DynamicResponse> response;
StringBuilder scrollInformation;
Int32 startIndex, stopIndex;
String maxScore, shardInformation, documentCount;
String[] splitShardInformation;
scrollInformation = new StringBuilder();
scrollInformation.Append("{");
scrollInformation.Append("\"scroll\" : \"" + scroll.KeepAlive + "m\"");
scrollInformation.Append(", \"scroll_id\" : \"" + scroll.ScrollId + "\"");
scrollInformation.Append("}");
response = _client.Scroll <DynamicResponse>(scrollInformation.ToString());
CheckResponse(response);
documentFilterResponse = new DocumentFilterResponse();
scroll.ScrollId = (String)(response.Body.Values.ElementAt(0));
if (response.Body.IsNotNull())
{
documentFilterResponse.ElapsedTime = (Int32)(response.Body.Values.ElementAt(1));
// Get shard information.
shardInformation = (String)(response.Body.Values.ElementAt(4));
splitShardInformation = shardInformation.Split(':');
documentFilterResponse.ShardTotalCount = splitShardInformation[1].Substring(0, splitShardInformation[1].IndexOf(',')).WebParseInt32();
documentFilterResponse.ShardSuccessfulCount = splitShardInformation[2].Substring(0, splitShardInformation[2].IndexOf(',')).WebParseInt32();
if (documentFilterResponse.ShardSuccessfulCount == documentFilterResponse.ShardTotalCount)
{
documentFilterResponse.ShardFailedCount = splitShardInformation[3].Substring(0, splitShardInformation[3].IndexOf('}')).WebParseInt32();
}
else
{
documentFilterResponse.ShardFailedCount = splitShardInformation[3].Substring(0, splitShardInformation[3].IndexOf(',')).WebParseInt32();
}
documentFilterResponse.DocumentCount = 0;
documentFilterResponse.DocumentsJson = (String)(response.Body.Values.ElementAt(5));
documentFilterResponse.TimedOut = (Boolean)(response.Body.Values.ElementAt(2));
if (!documentFilterResponse.TimedOut)
{
// Get species observation count.
startIndex = documentFilterResponse.DocumentsJson.IndexOf(':') + 1;
stopIndex = documentFilterResponse.DocumentsJson.IndexOf(',');
documentCount = documentFilterResponse.DocumentsJson.Substring(startIndex, stopIndex - startIndex);
documentFilterResponse.DocumentCount = documentCount.WebParseInt64();
startIndex = stopIndex + 1;
if (documentFilterResponse.DocumentCount > 0)
{
// Get max score
startIndex = documentFilterResponse.DocumentsJson.IndexOf(':', startIndex) + 1;
stopIndex = documentFilterResponse.DocumentsJson.IndexOf(',', startIndex);
maxScore = documentFilterResponse.DocumentsJson.Substring(startIndex, stopIndex - startIndex);
if (maxScore != "null")
{
documentFilterResponse.MaxScore = maxScore.WebParseDouble();
}
}
}
}
return(documentFilterResponse);
}
