Nginx OTel module.

src/trace_context.hpp

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <opentelemetry/trace/trace_id.h>
+#include <opentelemetry/trace/span_id.h>
+#include <opentelemetry/sdk/trace/random_id_generator.h>
+
+#include "str_view.hpp"
+
+struct TraceContext {
+    opentelemetry::trace::TraceId traceId;
+    opentelemetry::trace::SpanId spanId;
+    bool sampled;
+    StrView state;
+
+    static TraceContext generate(bool sampled, TraceContext parent = {})
+    {
+        opentelemetry::sdk::trace::RandomIdGenerator idGen;
+
+        return {parent.traceId.IsValid() ?
+                    parent.traceId : idGen.GenerateTraceId(),
+                idGen.GenerateSpanId(),
+                sampled,
+                parent.state};
+    }
+};