Opentracing support

vendor/github.com/openzipkin/zipkin-go-opentracing/event.go

@@ -0,0 +1,62 @@
+package zipkintracer
+
+import "github.com/opentracing/opentracing-go"
+
+// A SpanEvent is emitted when a mutating command is called on a Span.
+type SpanEvent interface{}
+
+// EventCreate is emitted when a Span is created.
+type EventCreate struct{ OperationName string }
+
+// EventTag is received when SetTag is called.
+type EventTag struct {
+	Key   string
+	Value interface{}
+}
+
+// EventBaggage is received when SetBaggageItem is called.
+type EventBaggage struct {
+	Key, Value string
+}
+
+// EventLogFields is received when LogFields or LogKV is called.
+type EventLogFields opentracing.LogRecord
+
+// EventLog is received when Log (or one of its derivatives) is called.
+//
+// DEPRECATED
+type EventLog opentracing.LogData
+
+// EventFinish is received when Finish is called.
+type EventFinish RawSpan
+
+func (s *spanImpl) onCreate(opName string) {
+	if s.event != nil {
+		s.event(EventCreate{OperationName: opName})
+	}
+}
+func (s *spanImpl) onTag(key string, value interface{}) {
+	if s.event != nil {
+		s.event(EventTag{Key: key, Value: value})
+	}
+}
+func (s *spanImpl) onLog(ld opentracing.LogData) {
+	if s.event != nil {
+		s.event(EventLog(ld))
+	}
+}
+func (s *spanImpl) onLogFields(lr opentracing.LogRecord) {
+	if s.event != nil {
+		s.event(EventLogFields(lr))
+	}
+}
+func (s *spanImpl) onBaggage(key, value string) {
+	if s.event != nil {
+		s.event(EventBaggage{Key: key, Value: value})
+	}
+}
+func (s *spanImpl) onFinish(sp RawSpan) {
+	if s.event != nil {
+		s.event(EventFinish(sp))
+	}
+}