embed grpc server stream and client so they can be accessed (#1916)

server/grpc/stream.go

@@ -9,7 +9,9 @@ import (
 
 // rpcStream implements a server side Stream.
 type rpcStream struct {
-	s       grpc.ServerStream
+	// embed the grpc stream so we can access it
+	grpc.ServerStream
+
 	request server.Request
 }
 
@@ -26,13 +28,13 @@ func (r *rpcStream) Request() server.Request {
 }
 
 func (r *rpcStream) Context() context.Context {
-	return r.s.Context()
+	return r.ServerStream.Context()
 }
 
 func (r *rpcStream) Send(m interface{}) error {
-	return r.s.SendMsg(m)
+	return r.ServerStream.SendMsg(m)
 }
 
 func (r *rpcStream) Recv(m interface{}) error {
-	return r.s.RecvMsg(m)
+	return r.ServerStream.RecvMsg(m)
 }