add support for streaming requests. cleanup watcher initilisation

client/client.go

@@ -1,6 +1,7 @@
 package client
 
 import (
+	"github.com/myodc/go-micro/registry"
 	"github.com/myodc/go-micro/transport"
 	"golang.org/x/net/context"
 )
@@ -11,9 +12,18 @@ type Client interface {
 	NewJsonRequest(string, string, interface{}) Request
 	Call(context.Context, Request, interface{}) error
 	CallRemote(context.Context, string, Request, interface{}) error
+	Stream(context.Context, Request, interface{}) (Streamer, error)
+	StreamRemote(context.Context, string, Request, interface{}) (Streamer, error)
+}
+
+type Streamer interface {
+	Request() Request
+	Error() error
+	Close() error
 }
 
 type options struct {
+	registry  registry.Registry
 	transport transport.Transport
 }
 
@@ -23,6 +33,12 @@ var (
 	DefaultClient Client = newRpcClient()
 )
 
+func Registry(r registry.Registry) Option {
+	return func(o *options) {
+		o.registry = r
+	}
+}
+
 func Transport(t transport.Transport) Option {
 	return func(o *options) {
 		o.transport = t
@@ -37,6 +53,14 @@ func CallRemote(ctx context.Context, address string, request Request, response i
 	return DefaultClient.CallRemote(ctx, address, request, response)
 }
 
+func Stream(ctx context.Context, request Request, responseChan interface{}) (Streamer, error) {
+	return DefaultClient.Stream(ctx, request, responseChan)
+}
+
+func StreamRemote(ctx context.Context, address string, request Request, responseChan interface{}) (Streamer, error) {
+	return DefaultClient.StreamRemote(ctx, address, request, responseChan)
+}
+
 func NewClient(opt ...Option) Client {
 	return newRpcClient(opt...)
 }