}
string Metrics::serialize_name(const string &name, const vector<pair<string, string>> &labels)
+{
+ return "nageru_" + name + serialize_labels(labels);
+}
+
+string Metrics::serialize_labels(const vector<pair<string, string>> &labels)
{
if (labels.empty()) {
- return "nageru_" + name;
+ return "";
}
string label_str;
}
label_str += label.first + "=\"" + label.second + "\"";
}
- return "nageru_" + name + "{" + label_str + "}";
+ return "{" + label_str + "}";
}
void Metrics::add(const string &name, const vector<pair<string, string>> &labels, atomic<int64_t> *location, Metrics::Type type)
types[name] = TYPE_HISTOGRAM;
}
+void Metrics::remove(const string &name, const vector<pair<string, string>> &labels)
+{
+ lock_guard<mutex> lock(mu);
+
+ auto it = metrics.find(MetricKey(name, labels));
+ assert(it != metrics.end());
+
+ // If this is the last metric with this name, remove the type as well.
+ if (!((it != metrics.begin() && prev(it)->first.name == name) ||
+ (it != metrics.end() && next(it)->first.name == name))) {
+ types.erase(name);
+ }
+
+ metrics.erase(it);
+}
+
string Metrics::serialize() const
{
stringstream ss;
lock_guard<mutex> lock(mu);
auto type_it = types.cbegin();
for (const auto &key_and_metric : metrics) {
- const string &name = key_and_metric.first.serialized;
+ string name = "nageru_" + key_and_metric.first.name + key_and_metric.first.serialized_labels;
const Metric &metric = key_and_metric.second;
if (type_it != types.cend() &&