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#pragma once
#include "metric_consumer.h"
#include <util/datetime/base.h>
#include <util/generic/ptr.h>
namespace NMonitoring {
///////////////////////////////////////////////////////////////////////////////
// IMetric
///////////////////////////////////////////////////////////////////////////////
class IMetric : public TThrRefBase {
public:
virtual ~IMetric() = default;
virtual EMetricType Type() const noexcept = 0;
virtual void Accept(TInstant time, IMetricConsumer* consumer) const = 0;
};
using IMetricPtr = TIntrusivePtr<IMetric>;
class IGauge: public IMetric {
public:
EMetricType Type() const noexcept final {
return EMetricType::GAUGE;
}
virtual double Add(double n) noexcept = 0;
virtual void Set(double n) noexcept = 0;
virtual double Get() const noexcept = 0;
virtual void Reset() noexcept {
Set(0);
}
};
class ILazyGauge: public IMetric {
public:
EMetricType Type() const noexcept final {
return EMetricType::GAUGE;
}
virtual double Get() const noexcept = 0;
};
class IIntGauge: public IMetric {
public:
EMetricType Type() const noexcept final {
return EMetricType::IGAUGE;
}
virtual i64 Add(i64 n) noexcept = 0;
virtual i64 Inc() noexcept {
return Add(1);
}
virtual i64 Dec() noexcept {
return Add(-1);
}
virtual void Set(i64 value) noexcept = 0;
virtual i64 Get() const noexcept = 0;
virtual void Reset() noexcept {
Set(0);
}
};
class ILazyIntGauge: public IMetric {
public:
EMetricType Type() const noexcept final {
return EMetricType::IGAUGE;
}
virtual i64 Get() const noexcept = 0;
};
class ICounter: public IMetric {
public:
EMetricType Type() const noexcept final {
return EMetricType::COUNTER;
}
virtual ui64 Inc() noexcept {
return Add(1);
}
virtual ui64 Add(ui64 n) noexcept = 0;
virtual ui64 Get() const noexcept = 0;
virtual void Reset() noexcept = 0;
};
class ILazyCounter: public IMetric {
public:
EMetricType Type() const noexcept final {
return EMetricType::COUNTER;
}
virtual ui64 Get() const noexcept = 0;
};
class IRate: public IMetric {
public:
EMetricType Type() const noexcept final {
return EMetricType::RATE;
}
virtual ui64 Inc() noexcept {
return Add(1);
}
virtual ui64 Add(ui64 n) noexcept = 0;
virtual ui64 Get() const noexcept = 0;
virtual void Reset() noexcept = 0;
};
class ILazyRate: public IMetric {
public:
EMetricType Type() const noexcept final {
return EMetricType::RATE;
}
virtual ui64 Get() const noexcept = 0;
};
class IHistogram: public IMetric {
public:
explicit IHistogram(bool isRate)
: IsRate_{isRate}
{
}
EMetricType Type() const noexcept final {
return IsRate_ ? EMetricType::HIST_RATE : EMetricType::HIST;
}
virtual void Record(double value) noexcept = 0;
virtual void Record(double value, ui32 count) noexcept = 0;
virtual IHistogramSnapshotPtr TakeSnapshot() const = 0;
virtual void Reset() noexcept = 0;
protected:
const bool IsRate_;
};
///////////////////////////////////////////////////////////////////////////////
// TGauge
///////////////////////////////////////////////////////////////////////////////
class TGauge final: public IGauge {
public:
explicit TGauge(double value = 0.0) {
Set(value);
}
double Add(double n) noexcept override {
double newValue;
double oldValue = Get();
do {
newValue = oldValue + n;
} while (!Value_.compare_exchange_weak(oldValue, newValue, std::memory_order_release, std::memory_order_consume));
return newValue;
}
void Set(double n) noexcept override {
Value_.store(n, std::memory_order_relaxed);
}
double Get() const noexcept override {
return Value_.load(std::memory_order_relaxed);
}
void Accept(TInstant time, IMetricConsumer* consumer) const override {
consumer->OnDouble(time, Get());
}
private:
std::atomic<double> Value_;
};
///////////////////////////////////////////////////////////////////////////////
// TLazyGauge
///////////////////////////////////////////////////////////////////////////////
class TLazyGauge final: public ILazyGauge {
public:
explicit TLazyGauge(std::function<double()> supplier)
: Supplier_(std::move(supplier))
{
}
double Get() const noexcept override {
return Supplier_();
}
void Accept(TInstant time, IMetricConsumer* consumer) const override {
consumer->OnDouble(time, Get());
}
private:
std::function<double()> Supplier_;
};
///////////////////////////////////////////////////////////////////////////////
// TIntGauge
///////////////////////////////////////////////////////////////////////////////
class TIntGauge final: public IIntGauge {
public:
explicit TIntGauge(i64 value = 0) {
Set(value);
}
i64 Add(i64 n) noexcept override {
return Value_.fetch_add(n, std::memory_order_relaxed) + n;
}
void Set(i64 value) noexcept override {
Value_.store(value, std::memory_order_relaxed);
}
i64 Get() const noexcept override {
return Value_.load(std::memory_order_relaxed);
}
void Accept(TInstant time, IMetricConsumer* consumer) const override {
consumer->OnInt64(time, Get());
}
private:
std::atomic_int64_t Value_;
};
///////////////////////////////////////////////////////////////////////////////
// TLazyIntGauge
///////////////////////////////////////////////////////////////////////////////
class TLazyIntGauge final: public ILazyIntGauge {
public:
explicit TLazyIntGauge(std::function<i64()> supplier)
: Supplier_(std::move(supplier))
{
}
i64 Get() const noexcept override {
return Supplier_();
}
void Accept(TInstant time, IMetricConsumer* consumer) const override {
consumer->OnInt64(time, Get());
}
private:
std::function<i64()> Supplier_;
};
///////////////////////////////////////////////////////////////////////////////
// TCounter
///////////////////////////////////////////////////////////////////////////////
class TCounter final: public ICounter {
public:
explicit TCounter(ui64 value = 0) {
Value_.store(value, std::memory_order_relaxed);
}
ui64 Add(ui64 n) noexcept override {
return Value_.fetch_add(n, std::memory_order_relaxed) + n;
}
ui64 Get() const noexcept override {
return Value_.load(std::memory_order_relaxed);
}
void Reset() noexcept override {
Value_.store(0, std::memory_order_relaxed);
}
void Accept(TInstant time, IMetricConsumer* consumer) const override {
consumer->OnUint64(time, Get());
}
private:
std::atomic_uint64_t Value_;
};
///////////////////////////////////////////////////////////////////////////////
// TLazyCounter
///////////////////////////////////////////////////////////////////////////////
class TLazyCounter final: public ILazyCounter {
public:
explicit TLazyCounter(std::function<ui64()> supplier)
: Supplier_(std::move(supplier))
{
}
ui64 Get() const noexcept override {
return Supplier_();
}
void Accept(TInstant time, IMetricConsumer* consumer) const override {
consumer->OnUint64(time, Get());
}
private:
std::function<ui64()> Supplier_;
};
///////////////////////////////////////////////////////////////////////////////
// TRate
///////////////////////////////////////////////////////////////////////////////
class TRate final: public IRate {
public:
explicit TRate(ui64 value = 0) {
Value_.store(value, std::memory_order_relaxed);
}
ui64 Add(ui64 n) noexcept override {
return Value_.fetch_add(n, std::memory_order_relaxed) + n;
}
ui64 Get() const noexcept override {
return Value_.load(std::memory_order_relaxed);
}
void Reset() noexcept override {
Value_.store(0, std::memory_order_relaxed);
}
void Accept(TInstant time, IMetricConsumer* consumer) const override {
consumer->OnUint64(time, Get());
}
private:
std::atomic_uint64_t Value_;
};
///////////////////////////////////////////////////////////////////////////////
// TLazyRate
///////////////////////////////////////////////////////////////////////////////
class TLazyRate final: public ILazyRate {
public:
explicit TLazyRate(std::function<ui64()> supplier)
: Supplier_(std::move(supplier))
{
}
ui64 Get() const noexcept override {
return Supplier_();
}
void Accept(TInstant time, IMetricConsumer* consumer) const override {
consumer->OnUint64(time, Get());
}
private:
std::function<ui64()> Supplier_;
};
///////////////////////////////////////////////////////////////////////////////
// THistogram
///////////////////////////////////////////////////////////////////////////////
class THistogram final: public IHistogram {
public:
THistogram(IHistogramCollectorPtr collector, bool isRate)
: IHistogram(isRate)
, Collector_(std::move(collector))
{
}
THistogram(std::function<IHistogramCollectorPtr()> makeHistogramCollector, bool isRate)
: IHistogram(isRate)
, Collector_(makeHistogramCollector())
{
}
void Record(double value) noexcept override {
Collector_->Collect(value);
}
void Record(double value, ui32 count) noexcept override {
Collector_->Collect(value, count);
}
void Accept(TInstant time, IMetricConsumer* consumer) const override {
consumer->OnHistogram(time, TakeSnapshot());
}
IHistogramSnapshotPtr TakeSnapshot() const override {
return Collector_->Snapshot();
}
void Reset() noexcept override {
Collector_->Reset();
}
private:
IHistogramCollectorPtr Collector_;
};
}
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