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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include <chrono>
#include <memory>
#include <string>
#include <thread>
#include <utility>
#include "opentelemetry/common/attribute_value.h"
#include "opentelemetry/exporters/otlp/otlp_http.h"
#include "opentelemetry/exporters/otlp/otlp_http_metric_exporter_factory.h"
#include "opentelemetry/exporters/otlp/otlp_http_metric_exporter_options.h"
#include "opentelemetry/metrics/meter_provider.h"
#include "opentelemetry/sdk/common/global_log_handler.h"
#include "opentelemetry/sdk/metrics/export/periodic_exporting_metric_reader_factory.h"
#include "opentelemetry/sdk/metrics/export/periodic_exporting_metric_reader_options.h"
#include "opentelemetry/sdk/metrics/meter_context.h"
#include "opentelemetry/sdk/metrics/meter_context_factory.h"
#include "opentelemetry/sdk/metrics/meter_provider.h"
#include "opentelemetry/sdk/metrics/meter_provider_factory.h"
#include "opentelemetry/sdk/metrics/metric_reader.h"
#include "opentelemetry/sdk/metrics/provider.h"
#include "opentelemetry/sdk/metrics/push_metric_exporter.h"
#ifdef BAZEL_BUILD
# include "examples/common/metrics_foo_library/foo_library.h"
#else
# include "metrics_foo_library/foo_library.h"
#endif
namespace metrics_sdk = opentelemetry::sdk::metrics;
namespace common = opentelemetry::common;
namespace metrics_api = opentelemetry::metrics;
namespace otlp_exporter = opentelemetry::exporter::otlp;
namespace internal_log = opentelemetry::sdk::common::internal_log;
namespace
{
otlp_exporter::OtlpHttpMetricExporterOptions exporter_options;
void InitMetrics()
{
auto exporter = otlp_exporter::OtlpHttpMetricExporterFactory::Create(exporter_options);
std::string version{"1.2.0"};
std::string schema{"https://opentelemetry.io/schemas/1.2.0"};
// Initialize and set the global MeterProvider
metrics_sdk::PeriodicExportingMetricReaderOptions reader_options;
reader_options.export_interval_millis = std::chrono::milliseconds(1000);
reader_options.export_timeout_millis = std::chrono::milliseconds(500);
auto reader = metrics_sdk::PeriodicExportingMetricReaderFactory::Create(std::move(exporter),
reader_options);
auto context = metrics_sdk::MeterContextFactory::Create();
context->AddMetricReader(std::move(reader));
auto u_provider = metrics_sdk::MeterProviderFactory::Create(std::move(context));
std::shared_ptr<opentelemetry::metrics::MeterProvider> provider(std::move(u_provider));
metrics_sdk::Provider::SetMeterProvider(provider);
}
void CleanupMetrics()
{
std::shared_ptr<metrics_api::MeterProvider> none;
metrics_sdk::Provider::SetMeterProvider(none);
}
} // namespace
/*
Usage:
- example_otlp_http_metric
- example_otlp_http_metric <URL>
- example_otlp_http_metric <URL> <EXAMPLE>
- example_otlp_http_metric <URL> <EXAMPLE> <DEBUG>
- example_otlp_http_metric <URL> <EXAMPLE> <DEBUG> <BIN>
<EXAMPLE> = counter|observable_counter|histogram|all
<DEBUG> = yes|no, to turn console debug on or off
<BIN> = bin, to export in binary format
*/
int main(int argc, char *argv[])
{
std::string example_type;
if (argc > 1)
{
exporter_options.url = argv[1];
}
if (argc > 2)
{
example_type = argv[2];
}
if (argc > 3)
{
std::string debug = argv[3];
exporter_options.console_debug = debug != "" && debug != "0" && debug != "no";
}
if (argc > 4)
{
std::string binary_mode = argv[4];
if (binary_mode.size() >= 3 && binary_mode.substr(0, 3) == "bin")
{
exporter_options.content_type = otlp_exporter::HttpRequestContentType::kBinary;
}
}
if (exporter_options.console_debug)
{
internal_log::GlobalLogHandler::SetLogLevel(internal_log::LogLevel::Debug);
}
// Removing this line will leave the default noop MetricProvider in place.
InitMetrics();
std::string name{"otlp_http_metric_example"};
if (example_type == "counter")
{
foo_library::counter_example(name);
}
else if (example_type == "observable_counter")
{
foo_library::observable_counter_example(name);
}
else if (example_type == "histogram")
{
foo_library::histogram_example(name);
}
#if OPENTELEMETRY_ABI_VERSION_NO >= 2
else if (example_type == "gauge")
{
foo_library::gauge_example(name);
}
#endif
else
{
std::thread counter_example{&foo_library::counter_example, name};
std::thread observable_counter_example{&foo_library::observable_counter_example, name};
std::thread histogram_example{&foo_library::histogram_example, name};
#if OPENTELEMETRY_ABI_VERSION_NO >= 2
std::thread gauge_example{&foo_library::gauge_example, name};
#endif
counter_example.join();
observable_counter_example.join();
histogram_example.join();
#if OPENTELEMETRY_ABI_VERSION_NO >= 2
gauge_example.join();
#endif
}
CleanupMetrics();
return 0;
}
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