refactoring

weed/messaging/msg_broker_grpc_server.go

@@ -0,0 +1,98 @@
+package messaging
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+
+	"github.com/chrislusf/seaweedfs/weed/filer2"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/messaging_pb"
+	"github.com/chrislusf/seaweedfs/weed/util/log_buffer"
+)
+
+func (broker *MessageBroker) Subscribe(request *messaging_pb.SubscribeRequest, server messaging_pb.SeaweedMessaging_SubscribeServer) error {
+	panic("implement me")
+}
+
+func (broker *MessageBroker) Publish(stream messaging_pb.SeaweedMessaging_PublishServer) error {
+
+	// process initial request
+	in, err := stream.Recv()
+	if err == io.EOF {
+		return nil
+	}
+	if err != nil {
+		return err
+	}
+	namespace, topic, partition := in.Namespace, in.Topic, in.Partition
+
+	updatesChan := make(chan int32)
+
+	go func() {
+		for update := range updatesChan {
+			if err := stream.Send(&messaging_pb.PublishResponse{
+				PartitionCount: update,
+			}); err != nil {
+				glog.V(0).Infof("err sending publish response: %v", err)
+				return
+			}
+		}
+	}()
+
+	logBuffer := log_buffer.NewLogBuffer(time.Minute, func(startTime, stopTime time.Time, buf []byte) {
+
+		//targetFile :=
+		fmt.Sprintf("%s/%s/%s/%04d-%02d-%02d/%02d-%02d.part%02d",
+			filer2.TopicsDir, namespace, topic,
+			startTime.Year(), startTime.Month(), startTime.Day(), startTime.Hour(), startTime.Minute(),
+			partition,
+		)
+
+		/*
+			if err := f.appendToFile(targetFile, buf); err != nil {
+				glog.V(0).Infof("log write failed %s: %v", targetFile, err)
+			}
+		*/
+
+	}, func() {
+		// notify subscribers
+	})
+
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+
+		m := &messaging_pb.Message{
+			Timestamp: time.Now().UnixNano(),
+			Key:       in.Key,
+			Value:     in.Value,
+			Headers:   in.Headers,
+		}
+
+		data, err := proto.Marshal(m)
+		if err != nil {
+			glog.Errorf("marshall error: %v\n", err)
+			continue
+		}
+
+		logBuffer.AddToBuffer(in.Key, data)
+
+	}
+}
+
+func (broker *MessageBroker) ConfigureTopic(c context.Context, request *messaging_pb.ConfigureTopicRequest) (*messaging_pb.ConfigureTopicResponse, error) {
+	panic("implement me")
+}
+
+func (broker *MessageBroker) GetTopicConfiguration(c context.Context, request *messaging_pb.GetTopicConfigurationRequest) (*messaging_pb.GetTopicConfigurationResponse, error) {
+	panic("implement me")
+}

weed/messaging/msg_broker_server.go

@@ -0,0 +1,121 @@
+package messaging
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"google.golang.org/grpc"
+
+	"github.com/chrislusf/seaweedfs/weed/pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+	"github.com/chrislusf/seaweedfs/weed/security"
+	"github.com/chrislusf/seaweedfs/weed/util"
+)
+
+type MessageBrokerOption struct {
+	Filers             []string
+	DefaultReplication string
+	MaxMB              int
+	Port               int
+}
+
+type MessageBroker struct {
+	option         *MessageBrokerOption
+	grpcDialOption grpc.DialOption
+}
+
+func NewMessageBroker(option *MessageBrokerOption) (messageBroker *MessageBroker, err error) {
+
+	messageBroker = &MessageBroker{
+		option:         option,
+		grpcDialOption: security.LoadClientTLS(util.GetViper(), "grpc.msg_broker"),
+	}
+
+	go messageBroker.loopForEver()
+
+	return messageBroker, nil
+}
+
+func (broker *MessageBroker) loopForEver() {
+
+	for {
+		broker.checkPeers()
+		time.Sleep(3 * time.Second)
+	}
+
+}
+
+func (broker *MessageBroker) checkPeers() {
+
+	// contact a filer about masters
+	var masters []string
+	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{})
+			if err != nil {
+				return err
+			}
+			masters = append(masters, resp.Masters...)
+			return nil
+		})
+		if err != nil {
+			fmt.Printf("failed to read masters from %+v: %v\n", broker.option.Filers, err)
+			return
+		}
+	}
+
+	// contact each masters for filers
+	var filers []string
+	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
+			}
+
+			fmt.Printf("filers: %+v\n", resp.GrpcAddresses)
+			filers = append(filers, resp.GrpcAddresses...)
+
+			return nil
+		})
+		if err != nil {
+			fmt.Printf("failed to list filers: %v\n", err)
+			return
+		}
+	}
+
+	// contact each filer about brokers
+	for _, filer := range filers {
+		err := broker.withFilerClient(filer, func(client filer_pb.SeaweedFilerClient) error {
+			resp, err := client.GetFilerConfiguration(context.Background(), &filer_pb.GetFilerConfigurationRequest{})
+			if err != nil {
+				return err
+			}
+			masters = append(masters, resp.Masters...)
+			return nil
+		})
+		if err != nil {
+			fmt.Printf("failed to read masters from %+v: %v\n", broker.option.Filers, err)
+			return
+		}
+	}
+
+}
+
+func (broker *MessageBroker) withFilerClient(filer string, fn func(filer_pb.SeaweedFilerClient) error) error {
+
+	return pb.WithFilerClient(filer, broker.grpcDialOption, fn)
+
+}
+
+func (broker *MessageBroker) withMasterClient(master string, fn func(client master_pb.SeaweedClient) error) error {
+
+	return pb.WithMasterClient(master, broker.grpcDialOption, func(client master_pb.SeaweedClient) error {
+		return fn(client)
+	})
+
+}