114 lines
3.8 KiB
C++
114 lines
3.8 KiB
C++
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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#include <stdint.h>
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#include <stdio.h>
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#include <chrono>
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#include <iostream>
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#include <string>
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#include <thread>
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#include <utility>
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#include "opentelemetry/exporters/ostream/span_exporter_factory.h"
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#include "opentelemetry/nostd/shared_ptr.h"
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#include "opentelemetry/nostd/string_view.h"
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#include "opentelemetry/sdk/resource/resource.h"
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#include "opentelemetry/sdk/trace/batch_span_processor_factory.h"
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#include "opentelemetry/sdk/trace/batch_span_processor_options.h"
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#include "opentelemetry/sdk/trace/exporter.h"
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#include "opentelemetry/sdk/trace/processor.h"
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#include "opentelemetry/sdk/trace/provider.h"
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#include "opentelemetry/sdk/trace/tracer_provider.h"
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#include "opentelemetry/sdk/trace/tracer_provider_factory.h"
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#include "opentelemetry/trace/provider.h"
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#include "opentelemetry/trace/tracer.h"
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#include "opentelemetry/trace/tracer_provider.h"
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constexpr int kNumSpans = 10;
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namespace trace_api = opentelemetry::trace;
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namespace resource = opentelemetry::sdk::resource;
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namespace trace_sdk = opentelemetry::sdk::trace;
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namespace trace_exporter = opentelemetry::exporter::trace;
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namespace
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{
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void InitTracer()
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{
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auto exporter = trace_exporter::OStreamSpanExporterFactory::Create();
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// CONFIGURE BATCH SPAN PROCESSOR PARAMETERS
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trace_sdk::BatchSpanProcessorOptions options{};
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// We make the queue size `KNumSpans`*2+5 because when the queue is half full, a preemptive notif
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// is sent to start an export call, which we want to avoid in this simple example.
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options.max_queue_size = kNumSpans * 2 + 5;
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// Time interval (in ms) between two consecutive exports.
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options.schedule_delay_millis = std::chrono::milliseconds(3000);
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// We export `kNumSpans` after every `schedule_delay_millis` milliseconds.
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options.max_export_batch_size = kNumSpans;
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resource::ResourceAttributes attributes = {{"service", "test_service"},
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{"version", static_cast<uint32_t>(1)}};
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auto resource = resource::Resource::Create(attributes);
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auto processor = trace_sdk::BatchSpanProcessorFactory::Create(std::move(exporter), options);
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std::shared_ptr<opentelemetry::trace::TracerProvider> provider =
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trace_sdk::TracerProviderFactory::Create(std::move(processor), resource);
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// Set the global trace provider.
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trace_sdk::Provider::SetTracerProvider(provider);
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}
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void CleanupTracer()
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{
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std::shared_ptr<opentelemetry::trace::TracerProvider> none;
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trace_sdk::Provider::SetTracerProvider(none);
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}
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opentelemetry::nostd::shared_ptr<trace_api::Tracer> get_tracer()
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{
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auto provider = trace_api::Provider::GetTracerProvider();
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return provider->GetTracer("foo_library");
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}
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void StartAndEndSpans()
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{
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for (int i = 1; i <= kNumSpans; ++i)
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{
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get_tracer()->StartSpan("Span " + std::to_string(i));
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}
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}
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} // namespace
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int main(int /* argc */, char ** /* argv */)
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{
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// Removing this line will leave the default noop TracerProvider in place.
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InitTracer();
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std::cout << "Creating first batch of " << kNumSpans << " spans and waiting 3 seconds ...\n";
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StartAndEndSpans();
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std::this_thread::sleep_for(std::chrono::milliseconds(3000 + 50));
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// The spans should now be exported.
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std::cout << "....Exported!\n\n\n";
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// Do the same again
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std::cout << "Creating second batch of " << kNumSpans << " spans and waiting 3 seconds ...\n";
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StartAndEndSpans();
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std::this_thread::sleep_for(std::chrono::milliseconds(3000 + 50));
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std::cout << "....Exported!\n\n\n";
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// Shutdown and drain queue
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StartAndEndSpans();
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printf("Shutting down and draining queue.... \n");
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std::this_thread::sleep_for(std::chrono::milliseconds(2000));
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// We invoke the processor destructor
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// which in turn invokes the processor Shutdown(), which finally drains the queue of ALL
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// its spans.
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CleanupTracer();
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return 0;
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}
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