[Geneva] Support TraceState mapping (#445)

open-telemetry · May 24, 2024 · 369ac87 · 369ac87
1 parent 1a0bdf6
commit 369ac87
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diff --git a/exporters/fluentd/include/opentelemetry/exporters/fluentd/common/fluentd_fields.h b/exporters/fluentd/include/opentelemetry/exporters/fluentd/common/fluentd_fields.h
@@ -34,6 +34,8 @@
 #  define FLUENT_FIELD_SPAN_KIND            "kind"                  /* Span Kind               */
 #  define FLUENT_FIELD_SPAN_LINKS           "links"                 /* Span Links array        */
 
+#  define FLUENT_FIELD_TRACE_STATE          "traceState"            /* Trace State             */
+
 #  define FLUENT_FIELD_PROPERTIES           "env_properties"
 
 /* Span option constants */

diff --git a/exporters/fluentd/src/trace/recordable.cc b/exporters/fluentd/src/trace/recordable.cc
@@ -53,6 +53,7 @@ void Recordable::SetIdentity(
   options_[FLUENT_FIELD_SPAN_PARENTID] =
       std::string(parent_span_id_lower_base16, 16);
   options_[FLUENT_FIELD_TRACE_ID] = std::string(trace_id_lower_base16, 32);
+  options_[FLUENT_FIELD_TRACE_STATE] = span_context.trace_state().ToHeader();
 }
 
 void Recordable::SetAttribute(