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#pragma once
#include <library/cpp/json/json_writer.h>
namespace NMonitoring {
/**
* Deprecated writer of Solomon JSON format
* https://wiki.yandex-team.ru/solomon/api/dataformat/json
*
* This writer will be deleted soon, so please consider to use
* high level library library/cpp/monlib/encode which is decoupled from the
* particular format.
*/
class TDeprecatedJsonWriter {
private:
NJson::TJsonWriter JsonWriter;
enum EState {
STATE_ROOT,
STATE_DOCUMENT,
STATE_COMMON_LABELS,
STATE_METRICS,
STATE_METRIC,
STATE_LABELS,
};
EState State;
public:
explicit TDeprecatedJsonWriter(IOutputStream* out);
void OpenDocument();
void CloseDocument();
void OpenCommonLabels();
void CloseCommonLabels();
void WriteCommonLabel(TStringBuf name, TStringBuf value);
void OpenMetrics();
void CloseMetrics();
void OpenMetric();
void CloseMetric();
void OpenLabels();
void CloseLabels();
void WriteLabel(TStringBuf name, TStringBuf value);
template <typename... T>
void WriteLabels(T... pairs) {
OpenLabels();
WriteLabelsInner(pairs...);
CloseLabels();
}
void WriteModeDeriv();
void WriteValue(long long value);
void WriteDoubleValue(double d);
void WriteTs(ui64 ts);
private:
void WriteLabelsInner(TStringBuf name, TStringBuf value) {
WriteLabel(name, value);
}
template <typename... T>
void WriteLabelsInner(TStringBuf name, TStringBuf value, T... pairs) {
WriteLabel(name, value);
WriteLabelsInner(pairs...);
}
inline void TransitionState(EState current, EState next);
};
}
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