wip: new tracing system

internal/sessions/tracing.go

@@ -0,0 +1,35 @@
+package sessions
+
+import "go.opentelemetry.io/otel/propagation"
+
+type SessionStateCarrier struct {
+	*State
+}
+
+// Get implements propagation.TextMapCarrier.
+func (s SessionStateCarrier) Get(key string) string {
+	switch key {
+	case "pomerium_traceparent":
+		return s.Traceparent
+	case "pomerium_tracestate":
+		return s.Tracestate
+	}
+	return ""
+}
+
+// Set implements propagation.TextMapCarrier.
+func (s SessionStateCarrier) Set(key string, value string) {
+	switch key {
+	case "pomerium_traceparent":
+		s.Traceparent = value
+	case "pomerium_tracestate":
+		s.Tracestate = value
+	}
+}
+
+// Keys implements propagation.TextMapCarrier.
+func (s SessionStateCarrier) Keys() []string {
+	return nil
+}
+
+var _ propagation.TextMapCarrier = SessionStateCarrier{}