minetest.git - modified minetest for gpcfs purposes

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/* Minetest Copyright (C) 2013-2020 Minetest core developers team This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "metricsbackend.h" #if USE_PROMETHEUS #include <prometheus/exposer.h> #include <prometheus/registry.h> #include <prometheus/counter.h> #include <prometheus/gauge.h> #include "log.h" #include "settings.h" #endif MetricCounterPtr MetricsBackend::addCounter( const std::string &name, const std::string &help_str) { return std::make_shared<SimpleMetricCounter>(name, help_str); } MetricGaugePtr MetricsBackend::addGauge( const std::string &name, const std::string &help_str) { return std::make_shared<SimpleMetricGauge>(name, help_str); } #if USE_PROMETHEUS class PrometheusMetricCounter : public MetricCounter { public: PrometheusMetricCounter() = delete; PrometheusMetricCounter(const std::string &name, const std::string &help_str, std::shared_ptr<prometheus::Registry> registry) : MetricCounter(), m_family(prometheus::BuildCounter() .Name(name) .Help(help_str) .Register(*registry)), m_counter(m_family.Add({})) { } virtual ~PrometheusMetricCounter() {} virtual void increment(double number) { m_counter.Increment(number); } virtual double get() const { return m_counter.Value(); } private: prometheus::Family<prometheus::Counter> &m_family; prometheus::Counter &m_counter; }; class PrometheusMetricGauge : public MetricGauge { public: PrometheusMetricGauge() = delete; PrometheusMetricGauge(const std::string &name, const std::string &help_str, std::shared_ptr<prometheus::Registry> registry) : MetricGauge(), m_family(prometheus::BuildGauge() .Name(name) .Help(help_str) .Register(*registry)), m_gauge(m_family.Add({})) { } virtual ~PrometheusMetricGauge() {} virtual void increment(double number) { m_gauge.Increment(number); } virtual void decrement(double number) { m_gauge.Decrement(number); } virtual void set(double number) { m_gauge.Set(number); } virtual double get() const { return m_gauge.Value(); } private: prometheus::Family<prometheus::Gauge> &m_family; prometheus::Gauge &m_gauge; }; class PrometheusMetricsBackend : public MetricsBackend { public: PrometheusMetricsBackend(const std::string &addr) : MetricsBackend(), m_exposer(std::unique_ptr<prometheus::Exposer>( new prometheus::Exposer(addr))), m_registry(std::make_shared<prometheus::Registry>()) { m_exposer->RegisterCollectable(m_registry); } virtual ~PrometheusMetricsBackend() {} virtual MetricCounterPtr addCounter( const std::string &name, const std::string &help_str); virtual MetricGaugePtr addGauge( const std::string &name, const std::string &help_str); private: std::unique_ptr<prometheus::Exposer> m_exposer; std::shared_ptr<prometheus::Registry> m_registry; }; MetricCounterPtr PrometheusMetricsBackend::addCounter( const std::string &name, const std::string &help_str) { return std::make_shared<PrometheusMetricCounter>(name, help_str, m_registry); } MetricGaugePtr PrometheusMetricsBackend::addGauge( const std::string &name, const std::string &help_str) { return std::make_shared<PrometheusMetricGauge>(name, help_str, m_registry); } MetricsBackend *createPrometheusMetricsBackend() { std::string addr; g_settings->getNoEx("prometheus_listener_address", addr); return new PrometheusMetricsBackend(addr); } #endif


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