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#include "metric_registry.h"
#include <memory>
namespace NMonitoring {
namespace {
void ConsumeLabels(IMetricConsumer* consumer, const ILabels& labels) {
for (auto&& label: labels) {
consumer->OnLabel(label.Name(), label.Value());
}
}
template <typename TLabelsConsumer>
void ConsumeMetric(TInstant time, IMetricConsumer* consumer, IMetric* metric, TLabelsConsumer&& labelsConsumer) {
consumer->OnMetricBegin(metric->Type());
// (1) add labels
consumer->OnLabelsBegin();
labelsConsumer();
consumer->OnLabelsEnd();
// (2) add time and value
metric->Accept(time, consumer);
consumer->OnMetricEnd();
}
}
void WriteLabels(IMetricConsumer* consumer, const ILabels& labels) {
consumer->OnLabelsBegin();
ConsumeLabels(consumer, labels);
consumer->OnLabelsEnd();
}
TMetricRegistry::TMetricRegistry() = default;
TMetricRegistry::~TMetricRegistry() = default;
TMetricRegistry::TMetricRegistry(const TLabels& commonLabels)
: TMetricRegistry{}
{
CommonLabels_ = commonLabels;
}
TMetricRegistry& TMetricRegistry::operator=(TMetricRegistry&& other) = default;
TMetricRegistry* TMetricRegistry::Instance() {
//return SharedInstance().get();
return Singleton<TMetricRegistry>();
}
std::shared_ptr<TMetricRegistry> TMetricRegistry::SharedInstance() {
static auto instance(std::make_shared<TMetricRegistry>());
return instance;
}
TGauge* TMetricRegistry::Gauge(TLabels labels) {
return Metric<TGauge, EMetricType::GAUGE>(std::move(labels));
}
TGauge* TMetricRegistry::Gauge(ILabelsPtr labels) {
return Metric<TGauge, EMetricType::GAUGE>(std::move(labels));
}
TLazyGauge* TMetricRegistry::LazyGauge(TLabels labels, std::function<double()> supplier) {
return Metric<TLazyGauge, EMetricType::GAUGE>(std::move(labels), std::move(supplier));
}
TLazyGauge* TMetricRegistry::LazyGauge(ILabelsPtr labels, std::function<double()> supplier) {
return Metric<TLazyGauge, EMetricType::GAUGE>(std::move(labels), std::move(supplier));
}
TIntGauge* TMetricRegistry::IntGauge(TLabels labels) {
return Metric<TIntGauge, EMetricType::IGAUGE>(std::move(labels));
}
TIntGauge* TMetricRegistry::IntGauge(ILabelsPtr labels) {
return Metric<TIntGauge, EMetricType::IGAUGE>(std::move(labels));
}
TLazyIntGauge* TMetricRegistry::LazyIntGauge(TLabels labels, std::function<i64()> supplier) {
return Metric<TLazyIntGauge, EMetricType::GAUGE>(std::move(labels), std::move(supplier));
}
TLazyIntGauge* TMetricRegistry::LazyIntGauge(ILabelsPtr labels, std::function<i64()> supplier) {
return Metric<TLazyIntGauge, EMetricType::GAUGE>(std::move(labels), std::move(supplier));
}
TCounter* TMetricRegistry::Counter(TLabels labels) {
return Metric<TCounter, EMetricType::COUNTER>(std::move(labels));
}
TCounter* TMetricRegistry::Counter(ILabelsPtr labels) {
return Metric<TCounter, EMetricType::COUNTER>(std::move(labels));
}
TLazyCounter* TMetricRegistry::LazyCounter(TLabels labels, std::function<ui64()> supplier) {
return Metric<TLazyCounter, EMetricType::COUNTER>(std::move(labels), std::move(supplier));
}
TLazyCounter* TMetricRegistry::LazyCounter(ILabelsPtr labels, std::function<ui64()> supplier) {
return Metric<TLazyCounter, EMetricType::COUNTER>(std::move(labels), std::move(supplier));
}
TRate* TMetricRegistry::Rate(TLabels labels) {
return Metric<TRate, EMetricType::RATE>(std::move(labels));
}
TRate* TMetricRegistry::Rate(ILabelsPtr labels) {
return Metric<TRate, EMetricType::RATE>(std::move(labels));
}
TLazyRate* TMetricRegistry::LazyRate(TLabels labels, std::function<ui64()> supplier) {
return Metric<TLazyRate, EMetricType::RATE>(std::move(labels), std::move(supplier));
}
TLazyRate* TMetricRegistry::LazyRate(ILabelsPtr labels, std::function<ui64()> supplier) {
return Metric<TLazyRate, EMetricType::RATE>(std::move(labels), std::move(supplier));
}
THistogram* TMetricRegistry::HistogramCounter(TLabels labels, IHistogramCollectorPtr collector) {
return Metric<THistogram, EMetricType::HIST>(std::move(labels), std::move(collector), false);
}
THistogram* TMetricRegistry::HistogramCounter(ILabelsPtr labels, IHistogramCollectorPtr collector) {
return Metric<THistogram, EMetricType::HIST>(std::move(labels), std::move(collector), false);
}
THistogram* TMetricRegistry::HistogramCounter(TLabels labels, std::function<IHistogramCollectorPtr()> supplier) {
return Metric<THistogram, EMetricType::HIST>(std::move(labels), std::move(supplier), false);
}
THistogram* TMetricRegistry::HistogramCounter(ILabelsPtr labels, std::function<IHistogramCollectorPtr()> supplier) {
return Metric<THistogram, EMetricType::HIST>(std::move(labels), std::move(supplier), false);
}
THistogram* TMetricRegistry::HistogramRate(TLabels labels, IHistogramCollectorPtr collector) {
return Metric<THistogram, EMetricType::HIST_RATE>(std::move(labels), std::move(collector), true);
}
THistogram* TMetricRegistry::HistogramRate(ILabelsPtr labels, IHistogramCollectorPtr collector) {
return Metric<THistogram, EMetricType::HIST_RATE>(std::move(labels), std::move(collector), true);
}
THistogram* TMetricRegistry::HistogramRate(TLabels labels, std::function<IHistogramCollectorPtr()> supplier) {
return Metric<THistogram, EMetricType::HIST_RATE>(std::move(labels), std::move(supplier), true);
}
THistogram* TMetricRegistry::HistogramRate(ILabelsPtr labels, std::function<IHistogramCollectorPtr()> supplier) {
return Metric<THistogram, EMetricType::HIST_RATE>(std::move(labels), std::move(supplier), true);
}
void TMetricRegistry::Reset() {
TWriteGuard g{*Lock_};
for (auto& [label, metric] : Metrics_) {
switch (metric->Type()) {
case EMetricType::GAUGE:
static_cast<TGauge*>(metric.Get())->Set(.0);
break;
case EMetricType::IGAUGE:
static_cast<TIntGauge*>(metric.Get())->Set(0);
break;
case EMetricType::COUNTER:
static_cast<TCounter*>(metric.Get())->Reset();
break;
case EMetricType::RATE:
static_cast<TRate*>(metric.Get())->Reset();
break;
case EMetricType::HIST:
case EMetricType::HIST_RATE:
static_cast<THistogram*>(metric.Get())->Reset();
break;
case EMetricType::UNKNOWN:
case EMetricType::DSUMMARY:
case EMetricType::LOGHIST:
break;
}
}
}
void TMetricRegistry::Clear() {
TWriteGuard g{*Lock_};
Metrics_.clear();
}
template <typename TMetric, EMetricType type, typename TLabelsType, typename... Args>
TMetric* TMetricRegistry::Metric(TLabelsType&& labels, Args&&... args) {
{
TReadGuard g{*Lock_};
auto it = Metrics_.find(labels);
if (it != Metrics_.end()) {
Y_ENSURE(it->second->Type() == type, "cannot create metric " << labels
<< " with type " << MetricTypeToStr(type)
<< ", because registry already has same metric with type " << MetricTypeToStr(it->second->Type()));
return static_cast<TMetric*>(it->second.Get());
}
}
{
IMetricPtr metric = MakeIntrusive<TMetric>(std::forward<Args>(args)...);
TWriteGuard g{*Lock_};
// decltype(Metrics_)::iterator breaks build on windows
THashMap<ILabelsPtr, IMetricPtr>::iterator it;
if constexpr (!std::is_convertible_v<TLabelsType, ILabelsPtr>) {
it = Metrics_.emplace(new TLabels{std::forward<TLabelsType>(labels)}, std::move(metric)).first;
} else {
it = Metrics_.emplace(std::forward<TLabelsType>(labels), std::move(metric)).first;
}
return static_cast<TMetric*>(it->second.Get());
}
}
void TMetricRegistry::RemoveMetric(const ILabels& labels) noexcept {
TWriteGuard g{*Lock_};
Metrics_.erase(labels);
}
void TMetricRegistry::Accept(TInstant time, IMetricConsumer* consumer) const {
consumer->OnStreamBegin();
if (!CommonLabels_.Empty()) {
consumer->OnLabelsBegin();
ConsumeLabels(consumer, CommonLabels_);
consumer->OnLabelsEnd();
}
TVector<std::pair<ILabelsPtr, IMetricPtr>> tmpMetrics;
{
TReadGuard g{*Lock_};
tmpMetrics.reserve(Metrics_.size());
for (const auto& it: Metrics_) {
tmpMetrics.push_back(it);
}
}
for (const auto& it: tmpMetrics) {
ILabels* labels = it.first.Get();
IMetric* metric = it.second.Get();
ConsumeMetric(time, consumer, metric, [&]() {
ConsumeLabels(consumer, *labels);
});
}
consumer->OnStreamEnd();
}
void TMetricRegistry::Append(TInstant time, IMetricConsumer* consumer) const {
TReadGuard g{*Lock_};
for (const auto& it: Metrics_) {
ILabels* labels = it.first.Get();
IMetric* metric = it.second.Get();
ConsumeMetric(time, consumer, metric, [&]() {
ConsumeLabels(consumer, CommonLabels_);
ConsumeLabels(consumer, *labels);
});
}
}
}
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