Update README.md

README.md

@@ -34,60 +34,9 @@ While you had processed your logic, you can response or push message to the clie
 
 #### How to build distributed system with `Nano`
 
-Nano has no built-in distributed system components, but you can easily implement it with `gRPC` and `smux` . Here we take grpc as an example.
+Nano contains built-in distributed system solution, and make you creating a distributed game server easily.
 
-- First of all, you need to define a remote component
-```go
-type RemoteComponent struct {
-	rpcClients []*grpc.ClientConn
-}
-```
-
-- Second, fetch all grpc servers infomation from services like `etcd` or `consul`  in `nano` lifetime hooks
-```go
-type ServerInfo struct {
-	Host string `json:"host"`
-	Port int    `json:"port"`
-}
-
-// lifetime callback
-func (r *RemoteComponent) Init() {
-	// fetch server list from etcd
-	resp, err := http.Get("http://your_etcd_server/backend/server_list/area/10023")
-	if err != nil {
-		panic(err)
-	}
-
-	servers := []ServerInfo{}
-	if err := json.NewDecoder(resp.Body).Decode(&servers); err != nil {
-		panic(err)
-	}
-
-	for i := range servers {
-		server := servers[i]
-		client, err := grpc.Dial(fmt.Sprintf("%s:%d", server.Host, server.Post), options)
-		if err != nil {
-			panic(err)
-		}
-		r.rpcClients = append(r.rpcClients, client)
-	}
-}
-
-func (r *RemoteComponent) client(s *session.Session) *grpc.ClientConn {
-	// load balance
-	return r.rpcClients[s.UID() % len(s.rpcClients)]
-}
-
-// Your handler, accessed by:
-// nanoClient.Request("RemoteComponent.DemoHandler", &pb.DemoMsg{/*...*/})
-func (r *RemoteComponent) DemoHandler(s *session.Session, msg *pb.DemoMsg) error {
-	client := r.client(s)
-	// do something with client
-	// ....
-	// ...
-	return nil
-}
-```
+See: [The distributed chat demo](https://github.com/lonng/nano/tree/master/examples/cluster)
 
 The Nano will remain simple, but you can perform any operations in the component and get the desired goals. You can startup a group of `Nano` application as agent to dispatch message to backend servers.