88 lines
3.1 KiB
C++
88 lines
3.1 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/trace/propagation/http_trace_context.h"
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#include <cstring>
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#include <iostream>
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#include <vector>
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#include "opentelemetry/ext/http/client/http_client.h"
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#include "opentelemetry/nostd/shared_ptr.h"
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namespace
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{
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template <typename T>
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class HttpTextMapCarrier : public opentelemetry::context::propagation::TextMapCarrier
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{
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public:
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HttpTextMapCarrier<T>(T &headers) : headers_(headers) {}
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HttpTextMapCarrier() = 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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std::string key_to_compare = key.data();
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// Header's first letter seems to be automatically capitaliazed by our test http-server, so
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// compare accordingly.
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if (key == opentelemetry::trace::propagation::kTraceParent)
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{
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key_to_compare = "Traceparent";
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}
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else if (key == opentelemetry::trace::propagation::kTraceState)
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{
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key_to_compare = "Tracestate";
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}
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auto it = headers_.find(key_to_compare);
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if (it != headers_.end())
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{
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return it->second;
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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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headers_.insert(std::pair<std::string, std::string>(std::string(key), std::string(value)));
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}
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T headers_;
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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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