messaging can compile now

weed/messaging/broker/broker_append.go

@@ -0,0 +1,113 @@
+package broker
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/operation"
+	"github.com/chrislusf/seaweedfs/weed/pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/pb/messaging_pb"
+	"github.com/chrislusf/seaweedfs/weed/security"
+	"github.com/chrislusf/seaweedfs/weed/util"
+)
+
+func (broker *MessageBroker) appendToFile(targetFile string, topicConfig *messaging_pb.TopicConfiguration, data []byte) error {
+
+	assignResult, uploadResult, err2 := broker.assignAndUpload(topicConfig, data)
+	if err2 != nil {
+		return err2
+	}
+
+	dir, name := util.FullPath(targetFile).DirAndName()
+
+	chunk := &filer_pb.FileChunk{
+		FileId:    assignResult.Fid,
+		Offset:    0, // needs to be fixed during appending
+		Size:      uint64(uploadResult.Size),
+		Mtime:     time.Now().UnixNano(),
+		ETag:      uploadResult.ETag,
+		IsGzipped: uploadResult.Gzip > 0,
+	}
+
+	// append the chunk
+	if err := broker.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+
+		request := &filer_pb.AppendToEntryRequest{
+			Directory: dir,
+			EntryName: name,
+			Chunks:    []*filer_pb.FileChunk{chunk},
+		}
+
+		_, err := client.AppendToEntry(context.Background(), request)
+		if err != nil {
+			glog.V(0).Infof("append to file %v: %v", request, err)
+			return err
+		}
+
+		return nil
+	}); err != nil {
+		return fmt.Errorf("append to file %v: %v", targetFile, err)
+	}
+
+	return nil
+}
+
+func (broker *MessageBroker) assignAndUpload(topicConfig *messaging_pb.TopicConfiguration, data []byte) (*operation.AssignResult, *operation.UploadResult, error) {
+
+	var assignResult = &operation.AssignResult{}
+
+	// assign a volume location
+	if err := broker.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+
+		request := &filer_pb.AssignVolumeRequest{
+			Count:       1,
+			Replication: topicConfig.Replication,
+			Collection:  topicConfig.Collection,
+		}
+
+		resp, err := client.AssignVolume(context.Background(), request)
+		if err != nil {
+			glog.V(0).Infof("assign volume failure %v: %v", request, err)
+			return err
+		}
+		if resp.Error != "" {
+			return fmt.Errorf("assign volume failure %v: %v", request, resp.Error)
+		}
+
+		assignResult.Auth = security.EncodedJwt(resp.Auth)
+		assignResult.Fid = resp.FileId
+		assignResult.Url = resp.Url
+		assignResult.PublicUrl = resp.PublicUrl
+		assignResult.Count = uint64(resp.Count)
+
+		return nil
+	}); err != nil {
+		return nil, nil, err
+	}
+
+	// upload data
+	targetUrl := fmt.Sprintf("http://%s/%s", assignResult.Url, assignResult.Fid)
+	uploadResult, err := operation.UploadData(targetUrl, "", broker.option.Cipher, data, false, "", nil, assignResult.Auth)
+	if err != nil {
+		return nil, nil, fmt.Errorf("upload data %s: %v", targetUrl, err)
+	}
+	// println("uploaded to", targetUrl)
+	return assignResult, uploadResult, nil
+}
+
+func (broker *MessageBroker) WithFilerClient(fn func(filer_pb.SeaweedFilerClient) error) (err error) {
+
+	for _, filer := range broker.option.Filers {
+		if err = pb.WithFilerClient(filer, broker.grpcDialOption, fn); err != nil {
+			glog.V(0).Infof("fail to connect to %s: %v", filer, err)
+		} else {
+			break
+		}
+	}
+
+	return
+
+}

weed/messaging/broker/broker_grpc_server.go

@@ -0,0 +1,15 @@
+package broker
+
+import (
+	"context"
+
+	"github.com/chrislusf/seaweedfs/weed/pb/messaging_pb"
+)
+
+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/broker/broker_grpc_server_publish.go

@@ -0,0 +1,99 @@
+package broker
+
+import (
+	"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"
+)
+
+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
+	}
+
+	// TODO look it up
+	topicConfig := &messaging_pb.TopicConfiguration{
+
+	}
+
+	// get lock
+	tp := TopicPartition{
+		Namespace: in.Init.Namespace,
+		Topic:     in.Init.Topic,
+		Partition: in.Init.Partition,
+	}
+	logBuffer := broker.topicLocks.RequestPublisherLock(tp, func(startTime, stopTime time.Time, buf []byte) {
+
+		targetFile := fmt.Sprintf(
+			"%s/%s/%s/%04d-%02d-%02d/%02d-%02d.part%02d",
+			filer2.TopicsDir, tp.Namespace, tp.Topic,
+			startTime.Year(), startTime.Month(), startTime.Day(), startTime.Hour(), startTime.Minute(),
+			tp.Partition,
+		)
+
+		if err := broker.appendToFile(targetFile, topicConfig, buf); err != nil {
+			glog.V(0).Infof("log write failed %s: %v", targetFile, err)
+		}
+
+	})
+	defer broker.topicLocks.ReleaseLock(tp, true)
+
+	updatesChan := make(chan int32)
+
+	go func() {
+		for update := range updatesChan {
+			if err := stream.Send(&messaging_pb.PublishResponse{
+				Config: &messaging_pb.PublishResponse_ConfigMessage{
+					PartitionCount: update,
+				},
+			}); err != nil {
+				glog.V(0).Infof("err sending publish response: %v", err)
+				return
+			}
+		}
+	}()
+
+
+	// process each message
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+
+		if in.Data == nil {
+			continue
+		}
+
+		m := &messaging_pb.Message{
+			Timestamp: time.Now().UnixNano(),
+			Key:       in.Data.Key,
+			Value:     in.Data.Value,
+			Headers:   in.Data.Headers,
+		}
+
+		data, err := proto.Marshal(m)
+		if err != nil {
+			glog.Errorf("marshall error: %v\n", err)
+			continue
+		}
+
+		logBuffer.AddToBuffer(in.Data.Key, data)
+
+	}
+}

weed/messaging/broker/broker_grpc_server_subscribe.go

@@ -0,0 +1,88 @@
+package broker
+
+import (
+	"io"
+	"sync"
+	"time"
+
+	"github.com/golang/protobuf/proto"
+
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"github.com/chrislusf/seaweedfs/weed/pb/messaging_pb"
+	"github.com/chrislusf/seaweedfs/weed/util"
+)
+
+func (broker *MessageBroker) Subscribe(stream messaging_pb.SeaweedMessaging_SubscribeServer) error {
+
+	// process initial request
+	in, err := stream.Recv()
+	if err == io.EOF {
+		return nil
+	}
+	if err != nil {
+		return err
+	}
+
+	subscriberId := in.Init.SubscriberId
+
+	// get lock
+	tp := TopicPartition{
+		Namespace: in.Init.Namespace,
+		Topic:     in.Init.Topic,
+		Partition: in.Init.Partition,
+	}
+	lock := broker.topicLocks.RequestSubscriberLock(tp)
+	defer broker.topicLocks.ReleaseLock(tp, false)
+	cond := sync.NewCond(&lock.Mutex)
+
+	lastReadTime := time.Now()
+	switch in.Init.StartPosition {
+	case messaging_pb.SubscriberMessage_InitMessage_TIMESTAMP:
+		lastReadTime = time.Unix(0, in.Init.TimestampNs)
+	case messaging_pb.SubscriberMessage_InitMessage_LATEST:
+	case messaging_pb.SubscriberMessage_InitMessage_EARLIEST:
+	}
+
+	// how to process each message
+	// an error returned will end the subscription
+	eachMessageFn := func(m *messaging_pb.Message) error {
+		err := stream.Send(&messaging_pb.BrokerMessage{
+			Data:     m,
+		})
+		if err != nil {
+			glog.V(0).Infof("=> subscriber %v: %+v", subscriberId, err)
+		}
+		return err
+	}
+
+	// loop through all messages
+	for {
+
+		_, buf := lock.logBuffer.ReadFromBuffer(lastReadTime)
+
+		for pos := 0; pos+4 < len(buf); {
+
+			size := util.BytesToUint32(buf[pos : pos+4])
+			entryData := buf[pos+4 : pos+4+int(size)]
+
+			m := &messaging_pb.Message{}
+			if err = proto.Unmarshal(entryData, m); err != nil {
+				glog.Errorf("unexpected unmarshal messaging_pb.Message: %v", err)
+				pos += 4 + int(size)
+				continue
+			}
+
+			if err = eachMessageFn(m); err != nil {
+				return err
+			}
+
+			lastReadTime = time.Unix(0, m.Timestamp)
+			pos += 4 + int(size)
+		}
+
+		lock.Mutex.Lock()
+		cond.Wait()
+		lock.Mutex.Unlock()
+	}
+
+}

weed/messaging/broker/broker_server.go

@@ -0,0 +1,122 @@
+package broker
+
+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"
+)
+
+type MessageBrokerOption struct {
+	Filers             []string
+	DefaultReplication string
+	MaxMB              int
+	Port               int
+	Cipher             bool
+}
+
+type MessageBroker struct {
+	option         *MessageBrokerOption
+	grpcDialOption grpc.DialOption
+	topicLocks     *TopicLocks
+}
+
+func NewMessageBroker(option *MessageBrokerOption, grpcDialOption grpc.DialOption) (messageBroker *MessageBroker, err error) {
+
+	messageBroker = &MessageBroker{
+		option:         option,
+		grpcDialOption: grpcDialOption,
+		topicLocks:     NewTopicLocks(),
+	}
+
+	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)
+	})
+
+}

weed/messaging/broker/topic_lock.go

@@ -0,0 +1,80 @@
+package broker
+
+import (
+	"sync"
+	"time"
+
+	"github.com/chrislusf/seaweedfs/weed/util/log_buffer"
+)
+
+type TopicPartition struct {
+	Namespace string
+	Topic     string
+	Partition int32
+}
+type TopicLock struct {
+	sync.Mutex
+	subscriberCount int
+	publisherCount  int
+	logBuffer       *log_buffer.LogBuffer
+}
+
+type TopicLocks struct {
+	sync.Mutex
+	locks map[TopicPartition]*TopicLock
+}
+
+func NewTopicLocks() *TopicLocks {
+	return &TopicLocks{
+		locks: make(map[TopicPartition]*TopicLock),
+	}
+}
+
+func (tl *TopicLocks) RequestSubscriberLock(partition TopicPartition) *TopicLock {
+	tl.Lock()
+	defer tl.Unlock()
+
+	lock, found := tl.locks[partition]
+	if !found {
+		lock = &TopicLock{}
+		tl.locks[partition] = lock
+	}
+	lock.subscriberCount++
+
+	return lock
+}
+
+func (tl *TopicLocks) RequestPublisherLock(partition TopicPartition, flushFn func(startTime, stopTime time.Time, buf []byte)) *log_buffer.LogBuffer {
+	tl.Lock()
+	defer tl.Unlock()
+
+	lock, found := tl.locks[partition]
+	if !found {
+		lock = &TopicLock{}
+		tl.locks[partition] = lock
+	}
+	lock.publisherCount++
+	cond := sync.NewCond(&lock.Mutex)
+	lock.logBuffer = log_buffer.NewLogBuffer(time.Minute, flushFn, func() {
+		cond.Broadcast()
+	})
+	return lock.logBuffer
+}
+
+func (tl *TopicLocks) ReleaseLock(partition TopicPartition, isPublisher bool) {
+	tl.Lock()
+	defer tl.Unlock()
+
+	lock, found := tl.locks[partition]
+	if !found {
+		return
+	}
+	if isPublisher {
+		lock.publisherCount--
+	} else {
+		lock.subscriberCount--
+	}
+	if lock.subscriberCount <= 0 && lock.publisherCount <= 0 {
+		delete(tl.locks, partition)
+	}
+}