private static async Task <InfluxResultSet <TInfluxRow> > CreateBasedOnInterfaceAsync <TInfluxRow, TTimestamp>(
InfluxClient client,
IEnumerable <QueryResult> queryResults,
string db,
bool allowMetadataQuerying,
InfluxRowTypeInfo <TInfluxRow> propertyMap,
InfluxQueryOptions options,
CancellationToken cancellationToken = default)
where TInfluxRow : IInfluxRow <TTimestamp>, new()
{
var timestampParser = client.TimestampParserRegistry.FindTimestampParserOrNull <TTimestamp>();
// In this case, we will contruct objects based on the IInfluxRow interface
Dictionary <int, InfluxResult <TInfluxRow> > results = new Dictionary <int, InfluxResult <TInfluxRow> >();
foreach (var queryResult in queryResults)
{
foreach (var result in queryResult.Results)
{
InfluxResult <TInfluxRow> existingResult;
if (!results.TryGetValue(result.StatementId, out existingResult))
{
existingResult = new InfluxResult <TInfluxRow>(result.StatementId, result.Error ?? (result.Series == null ? Errors.UnexpectedQueryResult : null));
results.Add(result.StatementId, existingResult);
}
else
{
existingResult.AppendErrorMessage(result.Error);
}
if (existingResult.Succeeded)
{
foreach (var series in result.Series)
{
var name = series.Name;
// create influx series
var tags = series.Tags?.ToDictionary(x => x.Key, x => x.Value == string.Empty ? null : (object)x.Value) ?? new Dictionary <string, object>();
// find or create influx serie
var influxSerie = existingResult.FindGroupInternal(name, tags, true);
if (influxSerie == null)
{
influxSerie = new InfluxSeries <TInfluxRow>(name, tags);
existingResult.Series.Add(influxSerie);
}
// add data to found series
await AddValuesToInfluxSeriesByInterfaceAsync <TInfluxRow, TTimestamp>(
influxSerie, series, client, db, allowMetadataQuerying, propertyMap, options, timestampParser, cancellationToken);
}
}
}
}
return(new InfluxResultSet <TInfluxRow>(results.Values.ToList()));
}
private static InfluxResultSet <TInfluxRow> CreateBasedOnAttributes <TInfluxRow, TTimestamp>(
InfluxClient client,
IEnumerable <QueryResult> queryResults,
InfluxQueryOptions options,
InfluxRowTypeInfo <TInfluxRow> propertyMap)
where TInfluxRow : new()
{
// Create type based on attributes
Dictionary <int, InfluxResult <TInfluxRow> > results = new Dictionary <int, InfluxResult <TInfluxRow> >();
var timestampParser = client.TimestampParserRegistry.FindTimestampParserOrNull <TTimestamp>();
foreach (var queryResult in queryResults)
{
foreach (var result in queryResult.Results)
{
InfluxResult <TInfluxRow> existingResult;
if (!results.TryGetValue(result.StatementId, out existingResult))
{
existingResult = new InfluxResult <TInfluxRow>(result.StatementId, result.Error ?? (result.Series == null ? Errors.UnexpectedQueryResult : null));
results.Add(result.StatementId, existingResult);
}
else
{
existingResult.AppendErrorMessage(result.Error);
}
// TODO: What if error message is given in following query?
if (existingResult.Succeeded)
{
foreach (var series in result.Series)
{
var name = series.Name;
// create new dictionary, with correct typing (we must potentially convert strings to enums, if the column being used in the GROUP BY is an enum)
var tags = CreateTagDictionaryFromSerieBasedOnAttributes(series, propertyMap.All);
// find or create influx serie
var influxSerie = existingResult.FindGroupInternal(name, tags, true);
if (influxSerie == null)
{
influxSerie = new InfluxSeries <TInfluxRow>(name, tags);
existingResult.Series.Add(influxSerie);
}
// add data to found serie
AddValuesToInfluxSeriesByAttributes <TInfluxRow, TTimestamp>(influxSerie, series, propertyMap, options, timestampParser);
}
}
}
}
return(new InfluxResultSet <TInfluxRow>(results.Values.ToList()));
}
private static async Task AddValuesToInfluxSeriesByInterfaceAsync <TInfluxRow, TTimestamp>(
InfluxSeries <TInfluxRow> influxSerie,
SeriesResult series,
InfluxClient client,
string db,
bool allowMetadataQuerying,
InfluxRowTypeInfo <TInfluxRow> propertyMap,
InfluxQueryOptions options,
ITimestampParser <TTimestamp> timestampParser)
where TInfluxRow : IInfluxRow <TTimestamp>, new()
{
// Values will be null, if there are no entries in the result set
if (series.Values != null)
{
var precision = options.Precision;
var name = series.Name;
var columns = series.Columns;
var setters = new Action <TInfluxRow, string, object> [columns.Count];
var dataPoints = new List <TInfluxRow>();
// Get metadata information about the measurement we are querying, as we dont know
// which columns are tags/fields otherwise
DatabaseMeasurementInfo meta = null;
if (allowMetadataQuerying)
{
meta = await client.GetMetaInformationAsync(db, name, options.MetadataExpiration).ConfigureAwait(false);
}
for (int i = 0; i < columns.Count; i++)
{
var columnName = columns[i];
if (!allowMetadataQuerying)
{
setters[i] = (row, fieldName, value) => row.SetField(fieldName, value);
}
else if (columnName == InfluxConstants.TimeColumn)
{
setters[i] = (row, timeName, value) => row.SetTimestamp(timestampParser.ToTimestamp(options.Precision, value));
}
else if (meta.Tags.Contains(columnName))
{
setters[i] = (row, tagName, value) => row.SetTag(tagName, (string)value);
}
else
{
setters[i] = (row, fieldName, value) => row.SetField(fieldName, value);
}
}
// constructs the IInfluxRows using the IInfluxRow interface
foreach (var values in series.Values)
{
var dataPoint = new TInfluxRow();
propertyMap.SetMeasurementName(name, dataPoint);
// go through all values that are stored as a List<List<object>>
for (int i = 0; i < values.Count; i++)
{
var value = values[i]; // TODO: What about NULL values? Are they treated as empty strings or actual nulls?
if (value != null)
{
setters[i](dataPoint, columns[i], value);
}
}
dataPoints.Add(dataPoint);
}
influxSerie.Rows.AddRange(dataPoints);
}
}
private static void AddValuesToInfluxSeriesByAttributes <TInfluxRow, TTimestamp>(
InfluxSeries <TInfluxRow> influxSerie,
SeriesResult series,
InfluxRowTypeInfo <TInfluxRow> propertyMap,
InfluxQueryOptions options,
ITimestampParser <TTimestamp> timestampParser)
where TInfluxRow : new()
{
// Values will be null, if there are no entries in the result set
if (series.Values != null)
{
var dataPoints = new List <TInfluxRow>();
var precision = options.Precision;
var columns = series.Columns;
var name = series.Name;
// construct an array of properties based on the same indexing as the columns returned by the query
var properties = new PropertyExpressionInfo <TInfluxRow> [columns.Count];
for (int i = 0; i < columns.Count; i++)
{
PropertyExpressionInfo <TInfluxRow> propertyInfo;
if (propertyMap.All.TryGetValue(columns[i], out propertyInfo))
{
properties[i] = propertyInfo;
}
}
foreach (var values in series.Values)
{
// construct the data points based on the attributes
var dataPoint = new TInfluxRow();
propertyMap.SetMeasurementName(name, dataPoint);
for (int i = 0; i < values.Count; i++)
{
var value = values[i]; // TODO: What about NULL values? Are they treated as empty strings or actual nulls?
var property = properties[i];
// set the value based on the property, if both the value and property is not null
if (property != null)
{
if (value != null)
{
if (property.Key == InfluxConstants.TimeColumn)
{
property.SetValue(dataPoint, timestampParser.ToTimestamp(options.Precision, value));
}
else if (property.IsDateTime)
{
property.SetValue(dataPoint, DateTime.Parse((string)value, CultureInfo.InvariantCulture, OnlyUtcStyles));
}
else if (property.IsEnum)
{
property.SetValue(dataPoint, property.GetEnumValue(value));
}
else
{
// will throw exception if types does not match up
property.SetValue(dataPoint, Convert.ChangeType(value, property.Type, CultureInfo.InvariantCulture));
}
}
}
}
dataPoints.Add(dataPoint);
}
influxSerie.Rows.AddRange(dataPoints);
}
}
