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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.
*/
#pragma once
#include <memory>
#include <string>
#include <utility>
#include "config.h"
class MetricCounter
{
public:
MetricCounter() = default;
virtual ~MetricCounter() {}
virtual void increment(double number = 1.0) = 0;
virtual double get() const = 0;
};
typedef std::shared_ptr<MetricCounter> MetricCounterPtr;
class MetricGauge
{
public:
MetricGauge() = default;
virtual ~MetricGauge() {}
virtual void increment(double number = 1.0) = 0;
virtual void decrement(double number = 1.0) = 0;
virtual void set(double number) = 0;
virtual double get() const = 0;
};
typedef std::shared_ptr<MetricGauge> MetricGaugePtr;
class MetricsBackend
{
public:
MetricsBackend() = default;
virtual ~MetricsBackend() {}
typedef std::initializer_list<std::pair<const std::string, std::string>> Labels;
virtual MetricCounterPtr addCounter(
const std::string &name, const std::string &help_str,
Labels labels = {});
virtual MetricGaugePtr addGauge(
const std::string &name, const std::string &help_str,
Labels labels = {});
};
#if USE_PROMETHEUS
MetricsBackend *createPrometheusMetricsBackend();
#endif
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