Add event processor in OpenTelemetry SpanProcessor to link errors and…

… transactions

sentry-opentelemetry/lib/sentry/opentelemetry/span_processor.rb

@@ -18,6 +18,7 @@ class SpanProcessor < ::OpenTelemetry::SDK::Trace::SpanProcessor
 
       def initialize
         @span_map = {}
+        setup_event_processor
       end
 
       def on_start(otel_span, parent_context)
@@ -152,6 +153,19 @@ def update_span_with_otel_data(sentry_span, otel_span)
         sentry_span.set_op(op)
         sentry_span.set_description(description)
       end
+
+      def setup_event_processor
+        Sentry.add_global_event_processor do |event, _hint|
+          span_context = ::OpenTelemetry::Trace.current_span.context
+          next event unless span_context.valid?
+
+          sentry_span = @span_map[span_context.hex_span_id]
+          next event unless sentry_span
+
+          event.contexts[:trace] ||= sentry_span.get_trace_context
+          event
+        end
+      end
     end
   end
 end