update etcd registry to use github.com/coreos/etcd/client

registry/etcd/etcd.go

@@ -7,8 +7,9 @@ import (
 	"strings"
 	"sync"
 
-	"github.com/coreos/go-etcd/etcd"
+	etcd "github.com/coreos/etcd/client"
 	"github.com/myodc/go-micro/registry"
+	"golang.org/x/net/context"
 )
 
 var (
@@ -16,7 +17,7 @@ var (
 )
 
 type etcdRegistry struct {
-	client *etcd.Client
+	client etcd.KeysAPI
 
 	sync.RWMutex
 	services map[string]*registry.Service
@@ -49,13 +50,13 @@ func (e *etcdRegistry) Deregister(s *registry.Service) error {
 	}
 
 	for _, node := range s.Nodes {
-		_, err := e.client.Delete(nodePath(s.Name, node.Id), false)
+		_, err := e.client.Delete(context.Background(), nodePath(s.Name, node.Id), &etcd.DeleteOptions{Recursive: false})
 		if err != nil {
 			return err
 		}
 	}
 
-	e.client.DeleteDir(servicePath(s.Name))
+	e.client.Delete(context.Background(), servicePath(s.Name), &etcd.DeleteOptions{Dir: true})
 	return nil
 }
 
@@ -69,11 +70,11 @@ func (e *etcdRegistry) Register(s *registry.Service) error {
 		Metadata: s.Metadata,
 	}
 
-	e.client.CreateDir(servicePath(s.Name), 0)
+	e.client.Set(context.Background(), servicePath(s.Name), "", &etcd.SetOptions{Dir: true})
 
 	for _, node := range s.Nodes {
 		service.Nodes = []*registry.Node{node}
-		_, err := e.client.Create(nodePath(service.Name, node.Id), encode(service), 0)
+		_, err := e.client.Set(context.Background(), nodePath(service.Name, node.Id), encode(service), &etcd.SetOptions{})
 		if err != nil {
 			return err
 		}
@@ -91,7 +92,7 @@ func (e *etcdRegistry) GetService(name string) (*registry.Service, error) {
 		return service, nil
 	}
 
-	rsp, err := e.client.Get(servicePath(name), false, false)
+	rsp, err := e.client.Get(context.Background(), servicePath(name), &etcd.GetOptions{})
 	if err != nil && !strings.HasPrefix(err.Error(), "100: Key not found") {
 		return nil, err
 	}
@@ -103,6 +104,8 @@ func (e *etcdRegistry) GetService(name string) (*registry.Service, error) {
 			continue
 		}
 		sn := decode(n.Value)
+		s.Name = sn.Name
+		s.Metadata = sn.Metadata
 		for _, node := range sn.Nodes {
 			s.Nodes = append(s.Nodes, node)
 		}
@@ -125,7 +128,7 @@ func (e *etcdRegistry) ListServices() ([]*registry.Service, error) {
 		return services, nil
 	}
 
-	rsp, err := e.client.Get(prefix, true, true)
+	rsp, err := e.client.Get(context.Background(), prefix, &etcd.GetOptions{Recursive: true, Sort: true})
 	if err != nil && !strings.HasPrefix(err.Error(), "100: Key not found") {
 		return nil, err
 	}
@@ -166,8 +169,12 @@ func NewRegistry(addrs []string, opt ...registry.Option) registry.Registry {
 		cAddrs = []string{"http://127.0.0.1:2379"}
 	}
 
+	c, _ := etcd.New(etcd.Config{
+		Endpoints: cAddrs,
+	})
+
 	e := &etcdRegistry{
-		client:   etcd.NewClient(cAddrs),
+		client:   etcd.NewKeysAPI(c),
 		services: make(map[string]*registry.Service),
 	}
 

registry/etcd/watcher.go

@@ -1,8 +1,9 @@
 package etcd
 
 import (
-	"github.com/coreos/go-etcd/etcd"
+	etcd "github.com/coreos/etcd/client"
 	"github.com/myodc/go-micro/registry"
+	"golang.org/x/net/context"
 )
 
 type etcdWatcher struct {
@@ -16,16 +17,28 @@ func newEtcdWatcher(r *etcdRegistry) (registry.Watcher, error) {
 		stop:     make(chan bool),
 	}
 
-	ch := make(chan *etcd.Response)
+	w := r.client.Watcher(prefix, &etcd.WatcherOptions{AfterIndex: 0, Recursive: true})
 
-	go r.client.Watch(prefix, 0, true, ch, ew.stop)
-	go ew.watch(ch)
+	c := context.Background()
+	ctx, cancel := context.WithCancel(c)
+
+	go func() {
+		<-ew.stop
+		cancel()
+	}()
+
+	go ew.watch(ctx, w)
 
 	return ew, nil
 }
 
-func (e *etcdWatcher) watch(ch chan *etcd.Response) {
-	for rsp := range ch {
+func (e *etcdWatcher) watch(ctx context.Context, w etcd.Watcher) {
+	for {
+		rsp, err := w.Next(ctx)
+		if err != nil && ctx.Err() != nil {
+			return
+		}
+
 		if rsp.Node.Dir {
 			continue
 		}