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#include "wilson_uploader.h"
#include <library/cpp/actors/core/actor_bootstrapped.h>
#include <library/cpp/actors/core/hfunc.h>
#include <library/cpp/actors/core/log.h>
#include <library/cpp/actors/wilson/protos/service.pb.h>
#include <library/cpp/actors/wilson/protos/service.grpc.pb.h>
#include <util/stream/file.h>
#include <util/string/hex.h>
#include <grpc++/grpc++.h>
#include <chrono>
namespace NWilson {
using namespace NActors;
namespace NServiceProto = opentelemetry::proto::collector::trace::v1;
namespace NTraceProto = opentelemetry::proto::trace::v1;
namespace {
class TWilsonUploader
: public TActorBootstrapped<TWilsonUploader>
{
TString Host;
ui16 Port;
TString RootCA;
std::shared_ptr<grpc::Channel> Channel;
std::unique_ptr<NServiceProto::TraceService::Stub> Stub;
grpc::CompletionQueue CQ;
std::unique_ptr<grpc::ClientContext> Context;
std::unique_ptr<grpc::ClientAsyncResponseReader<NServiceProto::ExportTraceServiceResponse>> Reader;
NServiceProto::ExportTraceServiceResponse Response;
grpc::Status Status;
struct TSpanQueueItem {
TMonotonic ExpirationTimestamp;
NTraceProto::Span Span;
ui32 Size;
};
std::deque<TSpanQueueItem> Spans;
ui64 SpansSize = 0;
TMonotonic NextSendTimestamp;
ui32 MaxSpansAtOnce = 25;
ui32 MaxSpansPerSecond = 10;
TDuration MaxSpanTimeInQueue = TDuration::Seconds(60);
bool WakeupScheduled = false;
public:
TWilsonUploader(TString host, ui16 port, TString rootCA)
: Host(std::move(host))
, Port(std::move(port))
, RootCA(std::move(rootCA))
{}
~TWilsonUploader() {
CQ.Shutdown();
}
static constexpr char ActorName[] = "WILSON_UPLOADER_ACTOR";
void Bootstrap() {
Become(&TThis::StateFunc);
Channel = grpc::CreateChannel(TStringBuilder() << Host << ":" << Port, grpc::SslCredentials({
.pem_root_certs = TFileInput(RootCA).ReadAll(),
}));
Stub = NServiceProto::TraceService::NewStub(Channel);
LOG_INFO_S(*TlsActivationContext, 430 /* NKikimrServices::WILSON */, "TWilsonUploader::Bootstrap");
}
void Handle(TEvWilson::TPtr ev) {
if (SpansSize >= 100'000'000) {
LOG_ERROR_S(*TlsActivationContext, 430 /* NKikimrServices::WILSON */, "dropped span due to overflow");
} else {
const TMonotonic expirationTimestamp = TActivationContext::Monotonic() + MaxSpanTimeInQueue;
auto& span = ev->Get()->Span;
const ui32 size = span.ByteSizeLong();
Spans.push_back(TSpanQueueItem{expirationTimestamp, std::move(span), size});
SpansSize += size;
CheckIfDone();
TryToSend();
}
}
void TryToSend() {
const TMonotonic now = TActivationContext::Monotonic();
ui32 numSpansDropped = 0;
while (!Spans.empty()) {
const TSpanQueueItem& item = Spans.front();
if (item.ExpirationTimestamp <= now) {
SpansSize -= item.Size;
Spans.pop_front();
++numSpansDropped;
} else {
break;
}
}
if (numSpansDropped) {
LOG_ERROR_S(*TlsActivationContext, 430 /* NKikimrServices::WILSON */,
"dropped " << numSpansDropped << " span(s) due to expiration");
}
if (Context || Spans.empty()) {
return;
} else if (now < NextSendTimestamp) {
ScheduleWakeup(NextSendTimestamp);
return;
}
NServiceProto::ExportTraceServiceRequest request;
auto *rspan = request.add_resource_spans();
auto *sspan = rspan->add_scope_spans();
NextSendTimestamp = now;
for (ui32 i = 0; i < MaxSpansAtOnce && !Spans.empty(); ++i, Spans.pop_front()) {
auto& item = Spans.front();
auto& s = item.Span;
LOG_DEBUG_S(*TlsActivationContext, 430 /* NKikimrServices::WILSON */, "exporting span"
<< " TraceId# " << HexEncode(s.trace_id())
<< " SpanId# " << HexEncode(s.span_id())
<< " ParentSpanId# " << HexEncode(s.parent_span_id())
<< " Name# " << s.name());
SpansSize -= item.Size;
s.Swap(sspan->add_spans());
NextSendTimestamp += TDuration::MicroSeconds(1'000'000 / MaxSpansPerSecond);
}
Context = std::make_unique<grpc::ClientContext>();
Reader = Stub->AsyncExport(Context.get(), std::move(request), &CQ);
Reader->Finish(&Response, &Status, nullptr);
}
void CheckIfDone() {
if (Context) {
void *tag;
bool ok;
if (CQ.AsyncNext(&tag, &ok, std::chrono::system_clock::now()) == grpc::CompletionQueue::GOT_EVENT) {
if (!Status.ok()) {
LOG_ERROR_S(*TlsActivationContext, 430 /* NKikimrServices::WILSON */,
"failed to commit traces: " << Status.error_message());
}
Reader.reset();
Context.reset();
} else {
ScheduleWakeup(TDuration::MilliSeconds(100));
}
}
}
template<typename T>
void ScheduleWakeup(T&& deadline) {
if (!WakeupScheduled) {
TActivationContext::Schedule(deadline, new IEventHandle(TEvents::TSystem::Wakeup, 0, SelfId(), {},
nullptr, 0));
WakeupScheduled = true;
}
}
void HandleWakeup() {
Y_VERIFY(WakeupScheduled);
WakeupScheduled = false;
CheckIfDone();
TryToSend();
}
STRICT_STFUNC(StateFunc,
hFunc(TEvWilson, Handle);
cFunc(TEvents::TSystem::Wakeup, HandleWakeup);
);
};
} // anonymous
IActor *CreateWilsonUploader(TString host, ui16 port, TString rootCA) {
return new TWilsonUploader(std::move(host), port, std::move(rootCA));
}
} // NWilson
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