remove old code

weed/mq/broker/broker_grpc_server_discovery.go

@@ -2,7 +2,6 @@ package broker
 
 import (
 	"context"
-	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/cluster"
 	"github.com/chrislusf/seaweedfs/weed/pb"
 	"time"
@@ -10,57 +9,8 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
-	"github.com/chrislusf/seaweedfs/weed/pb/mq_pb"
 )
 
-/*
-Topic discovery:
-
-When pub or sub connects, it ask for the whole broker list, and run consistent hashing to find the broker.
-
-The broker will check peers whether it is already hosted by some other broker, if that broker is alive and acknowledged alive, redirect to it.
-Otherwise, just host the topic.
-
-So, if the pub or sub connects around the same time, they would connect to the same broker. Everyone is happy.
-If one of the pub or sub connects very late, and the system topo changed quite a bit with new servers added or old servers died, checking peers will help.
-
-*/
-
-func (broker *MessageQueueBroker) FindBroker(c context.Context, request *mq_pb.FindBrokerRequest) (*mq_pb.FindBrokerResponse, error) {
-
-	t := &mq_pb.FindBrokerResponse{}
-	var peers []string
-
-	targetTopicPartition := fmt.Sprintf(TopicPartitionFmt, request.Namespace, request.Topic, request.Parition)
-
-	for _, filer := range broker.option.Filers {
-		err := broker.withFilerClient(false, filer, func(client filer_pb.SeaweedFilerClient) error {
-			resp, err := client.LocateBroker(context.Background(), &filer_pb.LocateBrokerRequest{
-				Resource: targetTopicPartition,
-			})
-			if err != nil {
-				return err
-			}
-			if resp.Found && len(resp.Resources) > 0 {
-				t.Broker = resp.Resources[0].GrpcAddresses
-				return nil
-			}
-			for _, b := range resp.Resources {
-				peers = append(peers, b.GrpcAddresses)
-			}
-			return nil
-		})
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	t.Broker = PickMember(peers, []byte(targetTopicPartition))
-
-	return t, nil
-
-}
-
 func (broker *MessageQueueBroker) checkFilers() {
 
 	// contact a filer about masters