Adjust interface a bit, fix indirect lint error (#125)

* Adjust interface a bit

* Extra lines at end

servicediscovery/kubernetes/kubernetes.go

@@ -11,14 +11,14 @@ import (
 	"github.com/dapr/components-contrib/servicediscovery"
 )
 
-type Resolver struct {
+type resolver struct {
 }
 
-func NewKubernetesResolver() *Resolver {
-	return &Resolver{}
+func NewKubernetesResolver() servicediscovery.Resolver {
+	return &resolver{}
 }
 
-func (z *Resolver) ResolveID(req *servicediscovery.ResolveRequest) (string, error) {
+func (z *resolver) ResolveID(req servicediscovery.ResolveRequest) (string, error) {
 	// Dapr requires this formatting for Kubernetes services
 	return fmt.Sprintf("%s-dapr.%s.svc.cluster.local:%d", req.ID, req.Namespace, req.Port), nil
 }

servicediscovery/kubernetes/kubernetes_test.go

@@ -18,7 +18,7 @@ func TestResolve(t *testing.T) {
 	request := servicediscovery.ResolveRequest{ID: "myid", Namespace: "abc", Port: 1234}
 
 	u := fmt.Sprintf("myid-dapr.abc.svc.cluster.local:1234")
-	target, err := resolver.ResolveID(&request)
+	target, err := resolver.ResolveID(request)
 
 	assert.Nil(t, err)
 	assert.Equal(t, target, u)

servicediscovery/mdns/mdns.go

@@ -21,7 +21,7 @@ func NewMDNSResolver() servicediscovery.Resolver {
 type resolver struct {
 }
 
-func (z *resolver) ResolveID(req *servicediscovery.ResolveRequest) (string, error) {
+func (z *resolver) ResolveID(req servicediscovery.ResolveRequest) (string, error) {
 	port, err := LookupPortMDNS(req.ID)
 	if err != nil {
 		return "", err
@@ -30,12 +30,12 @@ func (z *resolver) ResolveID(req *servicediscovery.ResolveRequest) (string, erro
 }
 
 // LookupPortMDNS uses mdns to find the port of a given service entry on a local network
-func LookupPortMDNS(id string) (int, error) {	
+func LookupPortMDNS(id string) (int, error) {
 	resolver, err := zeroconf.NewResolver(nil)
 	if err != nil {
 		return -1, fmt.Errorf("failed to initialize resolver: %e", err)
 	}
-	
+
 	port := -1
 	entries := make(chan *zeroconf.ServiceEntry)
 

servicediscovery/servicediscovery.go

@@ -6,5 +6,5 @@
 package servicediscovery
 
 type Resolver interface {
-	ResolveID(req *ResolveRequest) (string, error)
+	ResolveID(req ResolveRequest) (string, error)
 }