add broker connects to filer

weed/messaging/broker/broker_server.go

@@ -16,6 +16,7 @@ type MessageBrokerOption struct {
 	Filers             []string
 	DefaultReplication string
 	MaxMB              int
+	Ip                 string
 	Port               int
 	Cipher             bool
 }
@@ -37,73 +38,44 @@ func NewMessageBroker(option *MessageBrokerOption, grpcDialOption grpc.DialOptio
 
 	messageBroker.checkPeers()
 
-	// go messageBroker.loopForEver()
+	go messageBroker.keepConnectedToOneFiler()
 
 	return messageBroker, nil
 }
 
-func (broker *MessageBroker) loopForEver() {
+func (broker *MessageBroker) keepConnectedToOneFiler() {
 
 	for {
-		broker.checkPeers()
-		time.Sleep(3 * time.Second)
-	}
-
-}
-
-func (broker *MessageBroker) checkPeers() {
-
-	// contact a filer about masters
-	var masters []string
-	found := false
-	for !found {
 		for _, filer := range broker.option.Filers {
-			err := broker.withFilerClient(filer, func(client filer_pb.SeaweedFilerClient) error {
-				resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
+			broker.withFilerClient(filer, func(client filer_pb.SeaweedFilerClient) error {
+				stream, err := client.KeepConnected(context.Background())
 				if err != nil {
+					glog.V(0).Infof("%s:%d failed to keep connected to %s: %v", broker.option.Ip, broker.option.Port, filer, err)
 					return err
 				}
-				masters = append(masters, resp.Masters...)
-				return nil
-			})
-			if err == nil {
-				found = true
-				break
-			}
-			glog.V(0).Infof("failed to read masters from %+v: %v", broker.option.Filers, err)
-			time.Sleep(time.Second)
-		}
-	}
-	glog.V(0).Infof("received master list: %s", masters)
-
-	// contact each masters for filers
-	var filers []string
-	found = false
-	for !found {
-		for _, master := range masters {
-			err := broker.withMasterClient(master, func(client master_pb.SeaweedClient) error {
-				resp, err := client.ListMasterClients(context.Background(), &master_pb.ListMasterClientsRequest{
-					ClientType: "filer",
-				})
-				if err != nil {
-					return err
+				glog.V(0).Infof("conntected with filer: %v", filer)
+				for {
+					if err := stream.Send(&filer_pb.KeepConnectedRequest{
+						Name:     broker.option.Ip,
+						GrpcPort: uint32(broker.option.Port),
+					}); err != nil {
+						glog.V(0).Infof("%s:%d failed to sendto %s: %v", broker.option.Ip, broker.option.Port, filer, err)
+						return err
+					}
+					// println("send heartbeat")
+					if _, err := stream.Recv(); err != nil {
+						glog.V(0).Infof("%s:%d failed to receive from %s: %v", broker.option.Ip, broker.option.Port, filer, err)
+						return err
+					}
+					// println("received reply")
+					time.Sleep(11*time.Second)
+					// println("woke up")
 				}
-
-				filers = append(filers, resp.GrpcAddresses...)
-
 				return nil
 			})
-			if err == nil {
-				found = true
-				break
-			}
-			glog.V(0).Infof("failed to list filers: %v", err)
-			time.Sleep(time.Second)
+			time.Sleep(3*time.Second)
 		}
 	}
-	glog.V(0).Infof("received filer list: %s", filers)
-
-	broker.option.Filers = filers
 
 }