99 lines
3.3 KiB
C++
99 lines
3.3 KiB
C++
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "opentelemetry/exporters/ostream/span_exporter.h"
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#include "opentelemetry/sdk/trace/simple_processor.h"
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#include "opentelemetry/sdk/trace/tracer_provider.h"
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#include "opentelemetry/trace/provider.h"
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#include "opentelemetry/context/propagation/global_propagator.h"
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#include "opentelemetry/context/propagation/text_map_propagator.h"
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#include "opentelemetry/nostd/shared_ptr.h"
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#include "opentelemetry/trace/propagation/http_trace_context.h"
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#include <grpcpp/grpcpp.h>
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#include <cstring>
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#include <iostream>
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#include <vector>
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using grpc::ClientContext;
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using grpc::ServerContext;
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namespace
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{
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class GrpcClientCarrier : public opentelemetry::context::propagation::TextMapCarrier
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{
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public:
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GrpcClientCarrier(ClientContext *context) : context_(context) {}
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GrpcClientCarrier() = default;
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virtual opentelemetry::nostd::string_view Get(
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opentelemetry::nostd::string_view key) const noexcept override
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{
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return "";
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}
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virtual void Set(opentelemetry::nostd::string_view key,
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opentelemetry::nostd::string_view value) noexcept override
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{
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std::cout << " Client ::: Adding " << key << " " << value << "\n";
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context_->AddMetadata(key.data(), value.data());
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}
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ClientContext *context_;
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};
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class GrpcServerCarrier : public opentelemetry::context::propagation::TextMapCarrier
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{
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public:
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GrpcServerCarrier(ServerContext *context) : context_(context) {}
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GrpcServerCarrier() = default;
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virtual opentelemetry::nostd::string_view Get(
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opentelemetry::nostd::string_view key) const noexcept override
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{
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auto it = context_->client_metadata().find(key.data());
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if (it != context_->client_metadata().end())
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{
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return it->second.data();
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}
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return "";
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}
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virtual void Set(opentelemetry::nostd::string_view key,
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opentelemetry::nostd::string_view value) noexcept override
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{
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// Not required for server
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}
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ServerContext *context_;
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};
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void initTracer()
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{
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auto exporter = std::unique_ptr<opentelemetry::sdk::trace::SpanExporter>(
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new opentelemetry::exporter::trace::OStreamSpanExporter);
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auto processor = std::unique_ptr<opentelemetry::sdk::trace::SpanProcessor>(
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new opentelemetry::sdk::trace::SimpleSpanProcessor(std::move(exporter)));
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std::vector<std::unique_ptr<opentelemetry::sdk::trace::SpanProcessor>> processors;
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processors.push_back(std::move(processor));
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// Default is an always-on sampler.
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auto context = std::make_shared<opentelemetry::sdk::trace::TracerContext>(std::move(processors));
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auto provider = opentelemetry::nostd::shared_ptr<opentelemetry::trace::TracerProvider>(
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new opentelemetry::sdk::trace::TracerProvider(context));
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// Set the global trace provider
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opentelemetry::trace::Provider::SetTracerProvider(provider);
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// set global propagator
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opentelemetry::context::propagation::GlobalTextMapPropagator::SetGlobalPropagator(
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opentelemetry::nostd::shared_ptr<opentelemetry::context::propagation::TextMapPropagator>(
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new opentelemetry::trace::propagation::HttpTraceContext()));
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}
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opentelemetry::nostd::shared_ptr<opentelemetry::trace::Tracer> get_tracer(std::string tracer_name)
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{
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auto provider = opentelemetry::trace::Provider::GetTracerProvider();
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return provider->GetTracer(tracer_name);
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}
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} // namespace
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