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#pragma once
#include <library/cpp/actors/core/actor.h>
#include <library/cpp/actors/core/actorsystem.h>
#include <opentelemetry/proto/trace/v1/trace.pb.h>
#include <util/generic/hash.h>
#include <util/datetime/cputimer.h>
#include "wilson_trace.h"
namespace NWilson {
enum class ERelation {
FollowsFrom,
ChildOf,
};
namespace NTraceProto = opentelemetry::proto::trace::v1;
namespace NCommonProto = opentelemetry::proto::common::v1;
struct TArrayValue;
struct TKeyValueList;
struct TBytes;
using TAttributeValue = std::variant<
TString,
bool,
i64,
double,
TArrayValue,
TKeyValueList,
TBytes
>;
struct TArrayValue : std::vector<TAttributeValue> {};
struct TKeyValueList : THashMap<TString, TAttributeValue> {};
struct TBytes : TString {};
void SerializeKeyValue(TString key, TAttributeValue value, NCommonProto::KeyValue *pb);
enum class EFlags : ui32 {
NONE = 0,
AUTO_END = 1,
};
Y_DECLARE_FLAGS(TFlags, EFlags);
Y_DECLARE_OPERATORS_FOR_FLAGS(TFlags);
class TSpan {
struct TData {
const TInstant StartTime;
const ui64 StartCycles;
const TTraceId TraceId;
NTraceProto::Span Span;
TFlags Flags;
int UncaughtExceptions = std::uncaught_exceptions();
bool Sent = false;
bool Ignored = false;
TData(TInstant startTime, ui64 startCycles, TTraceId traceId, TFlags flags)
: StartTime(startTime)
, StartCycles(startCycles)
, TraceId(std::move(traceId))
, Flags(flags)
{}
~TData() {
Y_DEBUG_ABORT_UNLESS(Sent || Ignored);
}
};
std::unique_ptr<TData> Data;
public:
TSpan() = default;
TSpan(const TSpan&) = delete;
TSpan(TSpan&&) = default;
TSpan(ui8 verbosity, TTraceId parentId, std::optional<TString> name, TFlags flags = EFlags::NONE)
: Data(parentId
? std::make_unique<TData>(TInstant::Now(), GetCycleCount(), parentId.Span(verbosity), flags)
: nullptr)
{
if (Y_UNLIKELY(*this)) {
if (verbosity <= parentId.GetVerbosity()) {
if (!parentId.IsRoot()) {
Data->Span.set_parent_span_id(parentId.GetSpanIdPtr(), parentId.GetSpanIdSize());
}
Data->Span.set_start_time_unix_nano(Data->StartTime.NanoSeconds());
Data->Span.set_kind(opentelemetry::proto::trace::v1::Span::SPAN_KIND_INTERNAL);
if (name) {
Name(std::move(*name));
}
Attribute("node_id", NActors::TActivationContext::ActorSystem()->NodeId);
} else {
Data->Ignored = true; // ignore this span due to verbosity mismatch, still allowing child spans to be created
}
}
}
~TSpan() {
if (Y_UNLIKELY(*this)) {
if (std::uncaught_exceptions() != Data->UncaughtExceptions) {
EndError("span terminated due to stack unwinding");
} else if (Data->Flags & EFlags::AUTO_END) {
End();
} else {
EndError("unterminated span");
}
}
}
TSpan& operator =(const TSpan&) = delete;
TSpan& operator =(TSpan&& other) {
if (this != &other) {
if (Y_UNLIKELY(*this)) {
EndError("TSpan instance incorrectly overwritten");
}
Data = std::exchange(other.Data, nullptr);
}
return *this;
}
explicit operator bool() const {
return Data && !Data->Sent && !Data->Ignored;
}
TSpan& EnableAutoEnd() {
if (Y_UNLIKELY(*this)) {
Data->Flags |= EFlags::AUTO_END;
} else {
VerifyNotSent();
}
return *this;
}
TSpan& Relation(ERelation /*relation*/) {
if (Y_UNLIKELY(*this)) {
// update relation in data somehow
} else {
VerifyNotSent();
}
return *this;
}
TSpan& Name(TString name) {
if (Y_UNLIKELY(*this)) {
Data->Span.set_name(std::move(name));
} else {
VerifyNotSent();
}
return *this;
}
TSpan& Attribute(TString name, TAttributeValue value) {
if (Y_UNLIKELY(*this)) {
SerializeKeyValue(std::move(name), std::move(value), Data->Span.add_attributes());
} else {
VerifyNotSent();
}
return *this;
}
TSpan& Event(TString name, TKeyValueList attributes) {
if (Y_UNLIKELY(*this)) {
auto *event = Data->Span.add_events();
event->set_time_unix_nano(TimeUnixNano());
event->set_name(std::move(name));
for (auto&& [key, value] : attributes) {
SerializeKeyValue(std::move(key), std::move(value), event->add_attributes());
}
} else {
VerifyNotSent();
}
return *this;
}
TSpan& Link(const TTraceId& traceId, TKeyValueList attributes) {
if (Y_UNLIKELY(*this)) {
auto *link = Data->Span.add_links();
link->set_trace_id(traceId.GetTraceIdPtr(), traceId.GetTraceIdSize());
link->set_span_id(traceId.GetSpanIdPtr(), traceId.GetSpanIdSize());
for (auto&& [key, value] : attributes) {
SerializeKeyValue(std::move(key), std::move(value), link->add_attributes());
}
} else {
VerifyNotSent();
}
return *this;
}
void EndOk() {
if (Y_UNLIKELY(*this)) {
auto *status = Data->Span.mutable_status();
status->set_code(NTraceProto::Status::STATUS_CODE_OK);
End();
} else {
VerifyNotSent();
}
}
void EndError(TString error) {
if (Y_UNLIKELY(*this)) {
auto *status = Data->Span.mutable_status();
status->set_code(NTraceProto::Status::STATUS_CODE_ERROR);
status->set_message(std::move(error));
End();
} else {
VerifyNotSent();
}
}
void End() {
if (Y_UNLIKELY(*this)) {
Data->Span.set_trace_id(Data->TraceId.GetTraceIdPtr(), Data->TraceId.GetTraceIdSize());
Data->Span.set_span_id(Data->TraceId.GetSpanIdPtr(), Data->TraceId.GetSpanIdSize());
Data->Span.set_end_time_unix_nano(TimeUnixNano());
Send();
} else {
VerifyNotSent();
}
}
TTraceId GetTraceId() const {
return Data ? TTraceId(Data->TraceId) : TTraceId();
}
private:
void Send();
ui64 TimeUnixNano() const {
const TInstant now = Data->StartTime + CyclesToDuration(GetCycleCount() - Data->StartCycles);
return now.NanoSeconds();
}
void VerifyNotSent() {
Y_DEBUG_ABORT_UNLESS(!Data || !Data->Sent, "span has been ended");
}
};
} // NWilson
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