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91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
#include "PrometheusMetricsWriter.h"
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#include <IO/WriteHelpers.h>
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namespace
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{
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template <typename T>
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void writeOutLine(DB::WriteBuffer & wb, T && val)
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{
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DB::writeText(std::forward<T>(val), wb);
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DB::writeChar('\n', wb);
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}
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template <typename T, typename... TArgs>
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void writeOutLine(DB::WriteBuffer & wb, T && val, TArgs &&... args)
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{
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DB::writeText(std::forward<T>(val), wb);
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DB::writeChar(' ', wb);
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writeOutLine(wb, std::forward<TArgs>(args)...);
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}
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}
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namespace DB
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{
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PrometheusMetricsWriter::PrometheusMetricsWriter(
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const Poco::Util::AbstractConfiguration & config, const std::string & config_name,
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const AsynchronousMetrics & async_metrics_)
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: async_metrics(async_metrics_)
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, send_events(config.getBool(config_name + ".events", true))
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, send_metrics(config.getBool(config_name + ".metrics", true))
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, send_asynchronous_metrics(config.getBool(config_name + ".asynchronous_metrics", true))
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{
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}
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void PrometheusMetricsWriter::write(WriteBuffer & wb) const
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{
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if (send_events)
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{
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for (size_t i = 0, end = ProfileEvents::end(); i < end; ++i)
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{
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const auto counter = ProfileEvents::global_counters[i].load(std::memory_order_relaxed);
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std::string metric_name{ProfileEvents::getName(static_cast<ProfileEvents::Event>(i))};
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std::string metric_doc{ProfileEvents::getDocumentation(static_cast<ProfileEvents::Event>(i))};
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std::string key{profile_events_prefix + metric_name};
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writeOutLine(wb, "# HELP", key, metric_doc);
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writeOutLine(wb, "# TYPE", key, "counter");
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writeOutLine(wb, key, counter);
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}
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}
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if (send_metrics)
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{
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for (size_t i = 0, end = CurrentMetrics::end(); i < end; ++i)
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{
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const auto value = CurrentMetrics::values[i].load(std::memory_order_relaxed);
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std::string metric_name{CurrentMetrics::getName(static_cast<CurrentMetrics::Metric>(i))};
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std::string metric_doc{CurrentMetrics::getDocumentation(static_cast<CurrentMetrics::Metric>(i))};
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std::string key{current_metrics_prefix + metric_name};
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writeOutLine(wb, "# HELP", key, metric_doc);
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writeOutLine(wb, "# TYPE", key, "gauge");
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writeOutLine(wb, key, value);
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}
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}
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if (send_asynchronous_metrics)
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{
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auto async_metrics_values = async_metrics.getValues();
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for (const auto & name_value : async_metrics_values)
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{
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std::string key{asynchronous_metrics_prefix + name_value.first};
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auto value = name_value.second;
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// TODO: add HELP section? asynchronous_metrics contains only key and value
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writeOutLine(wb, "# TYPE", key, "gauge");
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writeOutLine(wb, key, value);
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}
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}
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}
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}
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