141 lines
3.0 KiB
C++
141 lines
3.0 KiB
C++
/*
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Minetest
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Copyright (C) 2013-2020 Minetest core developers team
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#pragma once
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#include <memory>
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#include "config.h"
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#include "util/thread.h"
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class MetricCounter
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{
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public:
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MetricCounter() = default;
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virtual ~MetricCounter() {}
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virtual void increment(double number = 1.0) = 0;
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virtual double get() const = 0;
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};
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typedef std::shared_ptr<MetricCounter> MetricCounterPtr;
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class SimpleMetricCounter : public MetricCounter
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{
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public:
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SimpleMetricCounter() = delete;
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virtual ~SimpleMetricCounter() {}
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SimpleMetricCounter(const std::string &name, const std::string &help_str) :
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MetricCounter(), m_name(name), m_help_str(help_str),
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m_counter(0.0)
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{
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}
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virtual void increment(double number)
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{
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MutexAutoLock lock(m_mutex);
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m_counter += number;
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}
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virtual double get() const
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{
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MutexAutoLock lock(m_mutex);
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return m_counter;
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}
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private:
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std::string m_name;
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std::string m_help_str;
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mutable std::mutex m_mutex;
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double m_counter;
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};
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class MetricGauge
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{
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public:
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MetricGauge() = default;
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virtual ~MetricGauge() {}
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virtual void increment(double number = 1.0) = 0;
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virtual void decrement(double number = 1.0) = 0;
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virtual void set(double number) = 0;
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virtual double get() const = 0;
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};
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typedef std::shared_ptr<MetricGauge> MetricGaugePtr;
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class SimpleMetricGauge : public MetricGauge
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{
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public:
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SimpleMetricGauge() = delete;
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SimpleMetricGauge(const std::string &name, const std::string &help_str) :
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MetricGauge(), m_name(name), m_help_str(help_str), m_gauge(0.0)
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{
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}
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virtual ~SimpleMetricGauge() {}
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virtual void increment(double number)
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{
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MutexAutoLock lock(m_mutex);
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m_gauge += number;
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}
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virtual void decrement(double number)
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{
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MutexAutoLock lock(m_mutex);
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m_gauge -= number;
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}
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virtual void set(double number)
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{
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MutexAutoLock lock(m_mutex);
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m_gauge = number;
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}
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virtual double get() const
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{
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MutexAutoLock lock(m_mutex);
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return m_gauge;
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}
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private:
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std::string m_name;
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std::string m_help_str;
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mutable std::mutex m_mutex;
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double m_gauge;
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};
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class MetricsBackend
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{
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public:
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MetricsBackend() = default;
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virtual ~MetricsBackend() {}
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virtual MetricCounterPtr addCounter(
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const std::string &name, const std::string &help_str);
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virtual MetricGaugePtr addGauge(
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const std::string &name, const std::string &help_str);
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};
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#if USE_PROMETHEUS
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MetricsBackend *createPrometheusMetricsBackend();
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#endif
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