public static MetricsValue ToPrometheusMetric(this CounterValue.SetItem item)
{
var result = new MetricsValue
{
Gauge = new Gauge
{
Value = item.Count
},
Label = item.Tags.ToLabelPairs()
};
return(result);
}
private static void WriteMetric(StreamWriter streamWriter, MetricFamily family, MetricsValue metric)
{
var familyName = family.Name;
if (metric.Gauge != null)
{
WriteSimpleValue(streamWriter, familyName, metric.Gauge.Value, metric.Label);
}
else if (metric.Counter != null)
{
WriteSimpleValue(streamWriter, familyName, metric.Counter.Value, metric.Label);
}
else if (metric.Summary != null)
{
WriteSimpleValue(streamWriter, familyName, metric.Summary.Sample_Sum, metric.Label, "_sum");
WriteSimpleValue(streamWriter, familyName, metric.Summary.Sample_Count, metric.Label, "_count");
foreach (var quantileValuePair in metric.Summary.Quantile)
{
var quantile = double.IsPositiveInfinity(quantileValuePair.QuantileValue) ? "+Inf" : quantileValuePair.QuantileValue.ToString(CultureInfo.InvariantCulture);
WriteSimpleValue(
streamWriter,
familyName,
quantileValuePair.Value,
metric.Label.Concat(new[] { new LabelPair {
Name = "quantile", Value = quantile
} }));
}
}
else if (metric.Histogram != null)
{
WriteSimpleValue(streamWriter, familyName, metric.Histogram.Sample_Sum, metric.Label, "_sum");
WriteSimpleValue(streamWriter, familyName, metric.Histogram.Sample_Count, metric.Label, "_count");
foreach (var bucket in metric.Histogram.Buckets)
{
var value = double.IsPositiveInfinity(bucket.Upper_Bound) ? "+Inf" : bucket.Upper_Bound.ToString(CultureInfo.InvariantCulture);
WriteSimpleValue(
streamWriter,
familyName,
bucket.Cumulative_Count,
metric.Label.Concat(new[] { new LabelPair {
Name = "le", Value = value
} }),
"_bucket");
}
}
else
{
// not supported
}
}