lint (#53)

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

tcp.go

@@ -18,17 +18,14 @@ import (
 )
 
 type tcpServer struct {
+	hd          server.Handler
+	rsvc        *register.Service
+	exit        chan chan error
+	subscribers map[*tcpSubscriber][]broker.Subscriber
+	opts        server.Options
 	sync.RWMutex
-	opts         server.Options
-	hd           server.Handler
-	exit         chan chan error
-	registerOnce sync.Once
-	subscribers  map[*tcpSubscriber][]broker.Subscriber
-	// used for first registration
 	registered bool
 	init       bool
-	// register service instance
-	rsvc *register.Service
 }
 
 func (h *tcpServer) newCodec(ct string) (codec.Codec, error) {
@@ -89,8 +86,7 @@ func (h *tcpServer) Handle(handler server.Handler) error {
 func (h *tcpServer) NewHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
 	options := server.NewHandlerOptions(opts...)
 
-	var eps []*register.Endpoint
-
+	eps := make([]*register.Endpoint, 0, len(options.Metadata))
 	for name, metadata := range options.Metadata {
 		eps = append(eps, &register.Endpoint{
 			Name:     name,
@@ -157,12 +153,14 @@ func (h *tcpServer) Register() error {
 	if err != nil {
 		return err
 	}
+
 	service.Nodes[0].Metadata["protocol"] = "tcp"
-	service.Nodes[0].Metadata["transport"] = "tcp"
+	service.Nodes[0].Metadata["transport"] = service.Nodes[0].Metadata["protocol"]
 	service.Endpoints = eps
 
 	h.Lock()
-	var subscriberList []*tcpSubscriber
+
+	subscriberList := make([]*tcpSubscriber, 0, len(h.subscribers))
 	for e := range h.subscribers {
 		// Only advertise non internal subscribers
 		subscriberList = append(subscriberList, e)
@@ -312,10 +310,13 @@ func (h *tcpServer) Start() error {
 
 	if l := h.getListener(); l != nil {
 		ts = l
-	} else {
+	}
+
+	// nolint: nestif
+	if ts == nil {
 		// check the tls config for secure connect
-		if tc := config.TLSConfig; tc != nil {
-			ts, err = tls.Listen("tcp", config.Address, tc)
+		if config.TLSConfig != nil {
+			ts, err = tls.Listen("tcp", config.Address, config.TLSConfig)
 			// otherwise just plain tcp listener
 		} else {
 			ts, err = net.Listen("tcp", config.Address)
@@ -375,6 +376,7 @@ func (h *tcpServer) Start() error {
 				registered := h.registered
 				h.RUnlock()
 				rerr := h.opts.RegisterCheck(h.opts.Context)
+				// nolint: nestif
 				if rerr != nil && registered {
 					if config.Logger.V(logger.ErrorLevel) {
 						config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s, deregister it", config.Name, config.Id, rerr)
@@ -405,9 +407,13 @@ func (h *tcpServer) Start() error {
 		ch <- ts.Close()
 
 		// deregister
-		h.Deregister()
+		if cerr := h.Deregister(); cerr != nil {
+			config.Logger.Errorf(config.Context, "Register deregister error: %v", cerr)
+		}
 
-		config.Broker.Disconnect(config.Context)
+		if cerr := config.Broker.Disconnect(config.Context); cerr != nil {
+			config.Logger.Errorf(config.Context, "Broker disconnect error: %v", cerr)
+		}
 	}()
 
 	return nil
@@ -419,24 +425,25 @@ func (h *tcpServer) Stop() error {
 	return <-ch
 }
 
-func (s *tcpServer) String() string {
+func (h *tcpServer) String() string {
 	return "tcp"
 }
 
-func (s *tcpServer) Name() string {
-	return s.opts.Name
+func (h *tcpServer) Name() string {
+	return h.opts.Name
 }
 
-func (s *tcpServer) serve(ln net.Listener, h Handler) {
+func (h *tcpServer) serve(ln net.Listener, hd Handler) {
 	var tempDelay time.Duration // how long to sleep on accept failure
-	s.RLock()
-	config := s.opts
-	s.RUnlock()
+	h.RLock()
+	config := h.opts
+	h.RUnlock()
 	for {
 		c, err := ln.Accept()
+		// nolint: nestif
 		if err != nil {
 			select {
-			case <-s.exit:
+			case <-h.exit:
 				return
 			default:
 			}
@@ -465,7 +472,7 @@ func (s *tcpServer) serve(ln net.Listener, h Handler) {
 			config.Logger.Errorf(config.Context, "tcp: accept err: %v", err)
 			return
 		}
-		go h.Serve(c)
+		go hd.Serve(c)
 	}
 }