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https://github.com/jomjol/AI-on-the-edge-device.git
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1a76ae121c
* add prometheus endpoint * refine metrics implementation * move metrics generator to ClassFlowControll * add more metrics align prefix * add more metrics clean up * refine documentation * revert dependencies change * sanitize labels * create separate module for openmetrics * move openmetrics to separate folder * clean up * add basic unit-tests * work with const numbers add replaceAll for string replacement avoid opening std namespace adapt unit-tests * Update code/main/server_main.cpp --------- Co-authored-by: CaCO3 <caco3@ruinelli.ch>
44 lines
1.6 KiB
C++
44 lines
1.6 KiB
C++
#include "openmetrics.h"
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/**
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* create a singe metric from the given input
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**/
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std::string createMetric(const std::string &metricName, const std::string &help, const std::string &type, const std::string &value)
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{
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return "# HELP " + metricName + " " + help + "\n" +
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"# TYPE " + metricName + " " + type + "\n" +
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metricName + " " + value + "\n";
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}
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/**
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* Generate the MetricFamily from all available sequences
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* @returns the string containing the text wire format of the MetricFamily
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**/
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std::string createSequenceMetrics(std::string prefix, const std::vector<NumberPost *> &numbers)
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{
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std::string res;
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for (const auto &number : numbers)
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{
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// only valid data is reported (https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md#missing-data)
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if (number->ReturnValue.length() > 0)
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{
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auto label = number->name;
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// except newline, double quote, and backslash (https://github.com/OpenObservability/OpenMetrics/blob/main/specification/OpenMetrics.md#abnf)
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// to keep it simple, these characters are just removed from the label
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replaceAll(label, "\\", "");
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replaceAll(label, "\"", "");
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replaceAll(label, "\n", "");
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res += prefix + "_flow_value{sequence=\"" + label + "\"} " + number->ReturnValue + "\n";
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}
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}
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// prepend metadata if a valid metric was created
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if (res.length() > 0)
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{
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res = "# HELP " + prefix + "_flow_value current value of meter readout\n# TYPE " + prefix + "_flow_value gauge\n" + res;
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}
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return res;
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}
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