X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=metrics.cpp;h=86c3d591872a4a38d53d34a55216b66e4d6d1405;hb=fa54f2630c56a1df0046923d6a77b1bd58abf240;hp=86b5d231b0f0d7087036f8ccf3b7419646980c10;hpb=f5abd2ad495150cdb3c7b49d6841ece27a7fdb3e;p=nageru

diff --git a/metrics.cpp b/metrics.cpp
index 86b5d23..86c3d59 100644
--- a/metrics.cpp
+++ b/metrics.cpp
@@ -234,8 +234,11 @@ string Histogram::serialize(Metrics::Laziness laziness, const string &name, cons
 	return ss.str();
 }
 
-Summary::Summary(const vector<double> &quantiles, double window_seconds)
-	: quantiles(quantiles), window(window_seconds) {}
+void Summary::init(const vector<double> &quantiles, double window_seconds)
+{
+	this->quantiles = quantiles;
+	window = duration<double>(window_seconds);
+}
 
 void Summary::count_event(double val)
 {
@@ -314,7 +317,13 @@ string Summary::serialize(Metrics::Laziness laziness, const string &name, const
 		vector<pair<string, string>> quantile_labels = labels;
 		quantile_labels.emplace_back("quantile", quantile_ss.str());
 
-		ss << Metrics::serialize_name(name, quantile_labels) << " " << quantile_and_value.second << "\n";
+		double val = quantile_and_value.second;;
+		if (isnan(val)) {
+			// Prometheus can't handle “-nan”.
+			ss << Metrics::serialize_name(name, quantile_labels) << " NaN\n";
+		} else {
+			ss << Metrics::serialize_name(name, quantile_labels) << " " << val << "\n";
+		}
 	}
 
 	ss << Metrics::serialize_name(name + "_sum", labels) << " " << sum.load() << "\n";