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#include "text.h"
#include <library/cpp/monlib/encode/encoder_state.h>
#include <library/cpp/monlib/metrics/labels.h>
#include <library/cpp/monlib/metrics/metric_value.h>
#include <util/datetime/base.h>
#include <util/stream/format.h>
namespace NMonitoring {
namespace {
class TEncoderText final: public IMetricEncoder {
public:
TEncoderText(IOutputStream* out, bool humanReadableTs)
: Out_(out)
, HumanReadableTs_(humanReadableTs)
{
}
private:
void OnStreamBegin() override {
State_.Expect(TEncoderState::EState::ROOT);
}
void OnStreamEnd() override {
State_.Expect(TEncoderState::EState::ROOT);
}
void OnCommonTime(TInstant time) override {
State_.Expect(TEncoderState::EState::ROOT);
CommonTime_ = time;
if (time != TInstant::Zero()) {
Out_->Write(TStringBuf("common time: "));
WriteTime(time);
Out_->Write('\n');
}
}
void OnMetricBegin(EMetricType type) override {
State_.Switch(TEncoderState::EState::ROOT, TEncoderState::EState::METRIC);
ClearLastMetricState();
MetricType_ = type;
}
void OnMetricEnd() override {
State_.Switch(TEncoderState::EState::METRIC, TEncoderState::EState::ROOT);
WriteMetric();
}
void OnLabelsBegin() override {
if (State_ == TEncoderState::EState::METRIC) {
State_ = TEncoderState::EState::METRIC_LABELS;
} else if (State_ == TEncoderState::EState::ROOT) {
State_ = TEncoderState::EState::COMMON_LABELS;
} else {
State_.ThrowInvalid("expected METRIC or ROOT");
}
}
void OnLabelsEnd() override {
if (State_ == TEncoderState::EState::METRIC_LABELS) {
State_ = TEncoderState::EState::METRIC;
} else if (State_ == TEncoderState::EState::COMMON_LABELS) {
State_ = TEncoderState::EState::ROOT;
Out_->Write(TStringBuf("common labels: "));
WriteLabels();
Out_->Write('\n');
} else {
State_.ThrowInvalid("expected LABELS or COMMON_LABELS");
}
}
void OnLabel(TStringBuf name, TStringBuf value) override {
Labels_.Add(name, value);
}
void OnDouble(TInstant time, double value) override {
State_.Expect(TEncoderState::EState::METRIC);
TimeSeries_.Add(time, value);
}
void OnInt64(TInstant time, i64 value) override {
State_.Expect(TEncoderState::EState::METRIC);
TimeSeries_.Add(time, value);
}
void OnUint64(TInstant time, ui64 value) override {
State_.Expect(TEncoderState::EState::METRIC);
TimeSeries_.Add(time, value);
}
void OnHistogram(TInstant time, IHistogramSnapshotPtr snapshot) override {
State_.Expect(TEncoderState::EState::METRIC);
TimeSeries_.Add(time, snapshot.Get());
}
void OnSummaryDouble(TInstant time, ISummaryDoubleSnapshotPtr snapshot) override {
State_.Expect(TEncoderState::EState::METRIC);
TimeSeries_.Add(time, snapshot.Get());
}
void OnLogHistogram(TInstant ts, TLogHistogramSnapshotPtr snapshot) override {
State_.Expect(TEncoderState::EState::METRIC);
TimeSeries_.Add(ts, snapshot.Get());
}
void Close() override {
}
void WriteTime(TInstant time) {
if (HumanReadableTs_) {
char buf[64];
auto len = FormatDate8601(buf, sizeof(buf), time.TimeT());
Out_->Write(buf, len);
} else {
(*Out_) << time.Seconds();
}
}
void WriteValue(EMetricValueType type, TMetricValue value) {
switch (type) {
case EMetricValueType::DOUBLE:
(*Out_) << value.AsDouble();
break;
case EMetricValueType::INT64:
(*Out_) << value.AsInt64();
break;
case EMetricValueType::UINT64:
(*Out_) << value.AsUint64();
break;
case EMetricValueType::HISTOGRAM:
(*Out_) << *value.AsHistogram();
break;
case EMetricValueType::SUMMARY:
(*Out_) << *value.AsSummaryDouble();
break;
case EMetricValueType::LOGHISTOGRAM:
(*Out_) << *value.AsLogHistogram();
break;
case EMetricValueType::UNKNOWN:
ythrow yexception() << "unknown metric value type";
}
}
void WriteLabels() {
auto& out = *Out_;
const auto size = Labels_.Size();
size_t i = 0;
out << '{';
for (auto&& l : Labels_) {
out << l.Name() << TStringBuf("='") << l.Value() << '\'';
++i;
if (i < size) {
out << TStringBuf(", ");
}
};
out << '}';
}
void WriteMetric() {
// (1) type
TStringBuf typeStr = MetricTypeToStr(MetricType_);
(*Out_) << LeftPad(typeStr, MaxMetricTypeNameLength) << ' ';
// (2) name and labels
auto name = Labels_.Extract(TStringBuf("sensor"));
if (name) {
if (name->Value().find(' ') != TString::npos) {
(*Out_) << '"' << name->Value() << '"';
} else {
(*Out_) << name->Value();
}
}
WriteLabels();
// (3) values
if (!TimeSeries_.Empty()) {
TimeSeries_.SortByTs();
Out_->Write(TStringBuf(" ["));
for (size_t i = 0; i < TimeSeries_.Size(); i++) {
if (i > 0) {
Out_->Write(TStringBuf(", "));
}
const auto& point = TimeSeries_[i];
if (point.GetTime() == CommonTime_ || point.GetTime() == TInstant::Zero()) {
WriteValue(TimeSeries_.GetValueType(), point.GetValue());
} else {
Out_->Write('(');
WriteTime(point.GetTime());
Out_->Write(TStringBuf(", "));
WriteValue(TimeSeries_.GetValueType(), point.GetValue());
Out_->Write(')');
}
}
Out_->Write(']');
}
Out_->Write('\n');
}
void ClearLastMetricState() {
MetricType_ = EMetricType::UNKNOWN;
Labels_.Clear();
TimeSeries_.Clear();
}
private:
TEncoderState State_;
IOutputStream* Out_;
bool HumanReadableTs_;
TInstant CommonTime_ = TInstant::Zero();
EMetricType MetricType_ = EMetricType::UNKNOWN;
TLabels Labels_;
TMetricTimeSeries TimeSeries_;
};
}
IMetricEncoderPtr EncoderText(IOutputStream* out, bool humanReadableTs) {
return MakeHolder<TEncoderText>(out, humanReadableTs);
}
}
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