package broker import ( "context" "time" "google.golang.org/grpc" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/pb" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" "github.com/chrislusf/seaweedfs/weed/pb/master_pb" ) type MessageBrokerOption struct { Filers []pb.ServerAddress DefaultReplication string MaxMB int Ip string Port int Cipher bool } type MessageBroker struct { option *MessageBrokerOption grpcDialOption grpc.DialOption topicManager *TopicManager } func NewMessageBroker(option *MessageBrokerOption, grpcDialOption grpc.DialOption) (messageBroker *MessageBroker, err error) { messageBroker = &MessageBroker{ option: option, grpcDialOption: grpcDialOption, } messageBroker.topicManager = NewTopicManager(messageBroker) messageBroker.checkFilers() go messageBroker.keepConnectedToOneFiler() return messageBroker, nil } func (broker *MessageBroker) keepConnectedToOneFiler() { for { for _, filer := range broker.option.Filers { broker.withFilerClient(filer, func(client filer_pb.SeaweedFilerClient) error { ctx, cancel := context.WithCancel(context.Background()) defer cancel() stream, err := client.SubscribeVolumeLocationUpdates(ctx) 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 } initRequest := &filer_pb.SubscribeVolumeLocationUpdatesRequest{ Name: broker.option.Ip, GrpcPort: uint32(broker.option.Port), } for _, tp := range broker.topicManager.ListTopicPartitions() { initRequest.Resources = append(initRequest.Resources, tp.String()) } if err := stream.Send(&filer_pb.SubscribeVolumeLocationUpdatesRequest{ Name: broker.option.Ip, GrpcPort: uint32(broker.option.Port), }); err != nil { glog.V(0).Infof("broker %s:%d failed to init at %s: %v", broker.option.Ip, broker.option.Port, filer, err) return err } // TODO send events of adding/removing topics glog.V(0).Infof("conntected with filer: %v", filer) for { if err := stream.Send(&filer_pb.SubscribeVolumeLocationUpdatesRequest{ 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") } return nil }) time.Sleep(3 * time.Second) } } } func (broker *MessageBroker) withFilerClient(filer pb.ServerAddress, fn func(filer_pb.SeaweedFilerClient) error) error { return pb.WithFilerClient(filer, broker.grpcDialOption, fn) } func (broker *MessageBroker) withMasterClient(master pb.ServerAddress, fn func(client master_pb.SeaweedClient) error) error { return pb.WithMasterClient(master, broker.grpcDialOption, func(client master_pb.SeaweedClient) error { return fn(client) }) }