summaryrefslogtreecommitdiff
path: root/src/util/metricsbackend.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/util/metricsbackend.h')
-rw-r--r--src/util/metricsbackend.h140
1 files changed, 140 insertions, 0 deletions
diff --git a/src/util/metricsbackend.h b/src/util/metricsbackend.h
new file mode 100644
index 000000000..c37306392
--- /dev/null
+++ b/src/util/metricsbackend.h
@@ -0,0 +1,140 @@
+/*
+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 "config.h"
+#include "util/thread.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 SimpleMetricCounter : public MetricCounter
+{
+public:
+ SimpleMetricCounter() = delete;
+
+ virtual ~SimpleMetricCounter() {}
+
+ SimpleMetricCounter(const std::string &name, const std::string &help_str) :
+ MetricCounter(), m_name(name), m_help_str(help_str),
+ m_counter(0.0)
+ {
+ }
+
+ virtual void increment(double number)
+ {
+ MutexAutoLock lock(m_mutex);
+ m_counter += number;
+ }
+ virtual double get() const
+ {
+ MutexAutoLock lock(m_mutex);
+ return m_counter;
+ }
+
+private:
+ std::string m_name;
+ std::string m_help_str;
+
+ mutable std::mutex m_mutex;
+ double m_counter;
+};
+
+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 SimpleMetricGauge : public MetricGauge
+{
+public:
+ SimpleMetricGauge() = delete;
+
+ SimpleMetricGauge(const std::string &name, const std::string &help_str) :
+ MetricGauge(), m_name(name), m_help_str(help_str), m_gauge(0.0)
+ {
+ }
+
+ virtual ~SimpleMetricGauge() {}
+
+ virtual void increment(double number)
+ {
+ MutexAutoLock lock(m_mutex);
+ m_gauge += number;
+ }
+ virtual void decrement(double number)
+ {
+ MutexAutoLock lock(m_mutex);
+ m_gauge -= number;
+ }
+ virtual void set(double number)
+ {
+ MutexAutoLock lock(m_mutex);
+ m_gauge = number;
+ }
+ virtual double get() const
+ {
+ MutexAutoLock lock(m_mutex);
+ return m_gauge;
+ }
+
+private:
+ std::string m_name;
+ std::string m_help_str;
+
+ mutable std::mutex m_mutex;
+ double m_gauge;
+};
+
+class MetricsBackend
+{
+public:
+ MetricsBackend() = default;
+
+ virtual ~MetricsBackend() {}
+
+ virtual MetricCounterPtr addCounter(
+ const std::string &name, const std::string &help_str);
+ virtual MetricGaugePtr addGauge(
+ const std::string &name, const std::string &help_str);
+};
+
+#if USE_PROMETHEUS
+MetricsBackend *createPrometheusMetricsBackend();
+#endif