Refactor debug/trace ready for Jaeger

server/options.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/micro/go-micro/broker"
 	"github.com/micro/go-micro/codec"
+	"github.com/micro/go-micro/debug/trace"
 	"github.com/micro/go-micro/registry"
 	"github.com/micro/go-micro/transport"
 )
@@ -15,6 +16,7 @@ type Options struct {
 	Codecs       map[string]codec.NewCodec
 	Broker       broker.Broker
 	Registry     registry.Registry
+	Tracer       trace.Tracer
 	Transport    transport.Transport
 	Metadata     map[string]string
 	Name         string
@@ -152,6 +154,13 @@ func Registry(r registry.Registry) Option {
 	}
 }
 
+// Tracer mechanism for distributed tracking
+func Tracer(t trace.Tracer) Option {
+	return func(o *Options) {
+		o.Tracer = t
+	}
+}
+
 // Transport mechanism for communication e.g http, rabbitmq, etc
 func Transport(t transport.Transport) Option {
 	return func(o *Options) {