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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
#include "opentelemetry/sdk/resource/resource_detector.h"
#include "opentelemetry/nostd/variant.h"
#include "opentelemetry/sdk/common/env_variables.h"
#include "opentelemetry/sdk/resource/resource.h"
#include "opentelemetry/semconv/service_attributes.h"
#include "opentelemetry/version.h"
#include <stddef.h>
#include <sstream>
#include <string>
#include <unordered_map>
OPENTELEMETRY_BEGIN_NAMESPACE
namespace sdk
{
namespace resource
{
constexpr const char *kOtelResourceAttributes = "OTEL_RESOURCE_ATTRIBUTES";
constexpr const char *kOtelServiceName = "OTEL_SERVICE_NAME";
Resource ResourceDetector::Create(const ResourceAttributes &attributes,
const std::string &schema_url)
{
return Resource(attributes, schema_url);
}
Resource OTELResourceDetector::Detect() noexcept
{
std::string attributes_str, service_name;
bool attributes_exists = opentelemetry::sdk::common::GetStringEnvironmentVariable(
kOtelResourceAttributes, attributes_str);
bool service_name_exists =
opentelemetry::sdk::common::GetStringEnvironmentVariable(kOtelServiceName, service_name);
if (!attributes_exists && !service_name_exists)
{
return ResourceDetector::Create({});
}
ResourceAttributes attributes;
if (attributes_exists)
{
std::istringstream iss(attributes_str);
std::string token;
while (std::getline(iss, token, ','))
{
size_t pos = token.find('=');
if (pos != std::string::npos)
{
std::string key = token.substr(0, pos);
std::string value = token.substr(pos + 1);
attributes[key] = value;
}
}
}
if (service_name_exists)
{
attributes[semconv::service::kServiceName] = service_name;
}
return ResourceDetector::Create(attributes);
}
} // namespace resource
} // namespace sdk
OPENTELEMETRY_END_NAMESPACE
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