opentelemetry.hpp

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#pragma once
 
/// @file userver/tracing/opentelemetry.hpp
/// @brief OpenTelemetry traceparent header parsing and building.
/// @ingroup userver_universal
 
#include <string>
 
#include <userver/utils/expected.hpp>
#include <userver/utils/string_literal.hpp>
#include <userver/utils/strong_typedef.hpp>
 
USERVER_NAMESPACE_BEGIN
 
/// @brief OpenTelemetry traceparent parsing and header building.
namespace tracing::opentelemetry {
 
inline constexpr std::size_t kTraceIdSize = 32;
inline constexpr std::size_t kSpanIdSize = 16;
 
struct TraceParentDataView {
    std::string_view version;
    std::string_view trace_id;
    std::string_view span_id;
    std::string_view trace_flags;
};
 
utils::expected<TraceParentDataView, USERVER_NAMESPACE::utils::StringLiteral> ExtractTraceParentDataView(
    std::string_view trace_parent
) noexcept;
 
utils::expected<std::string, std::string> BuildTraceParentHeader(
    std::string_view trace_id,
    std::string_view span_id,
    std::string_view trace_flags
);
 
}  // namespace tracing::opentelemetry
 
USERVER_NAMESPACE_END