mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-07-03 07:36:45 +02:00
181 lines
6 KiB
Go
181 lines
6 KiB
Go
package sub_client
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import (
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"context"
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/pb"
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"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
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"io"
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"sync"
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"time"
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)
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func (sub *TopicSubscriber) doKeepConnectedToSubCoordinator() {
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waitTime := 1 * time.Second
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for {
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for _, broker := range sub.bootstrapBrokers {
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// lookup topic brokers
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var brokerLeader string
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err := pb.WithBrokerGrpcClient(false, broker, sub.SubscriberConfig.GrpcDialOption, func(client mq_pb.SeaweedMessagingClient) error {
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resp, err := client.FindBrokerLeader(context.Background(), &mq_pb.FindBrokerLeaderRequest{})
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if err != nil {
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return err
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}
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brokerLeader = resp.Broker
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return nil
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})
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if err != nil {
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glog.V(0).Infof("broker coordinator on %s: %v", broker, err)
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continue
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}
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glog.V(0).Infof("found broker coordinator: %v", brokerLeader)
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// connect to the balancer
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pb.WithBrokerGrpcClient(true, brokerLeader, sub.SubscriberConfig.GrpcDialOption, func(client mq_pb.SeaweedMessagingClient) error {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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stream, err := client.SubscriberToSubCoordinator(ctx)
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if err != nil {
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glog.V(0).Infof("subscriber %s: %v", sub.ContentConfig.Topic, err)
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return err
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}
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waitTime = 1 * time.Second
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// Maybe later: subscribe to multiple topics instead of just one
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if err := stream.Send(&mq_pb.SubscriberToSubCoordinatorRequest{
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Message: &mq_pb.SubscriberToSubCoordinatorRequest_Init{
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Init: &mq_pb.SubscriberToSubCoordinatorRequest_InitMessage{
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ConsumerGroup: sub.SubscriberConfig.ConsumerGroup,
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ConsumerGroupInstanceId: sub.SubscriberConfig.ConsumerGroupInstanceId,
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Topic: sub.ContentConfig.Topic.ToPbTopic(),
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},
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},
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}); err != nil {
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glog.V(0).Infof("subscriber %s send init: %v", sub.ContentConfig.Topic, err)
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return err
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}
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// keep receiving messages from the sub coordinator
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for {
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resp, err := stream.Recv()
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if err != nil {
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glog.V(0).Infof("subscriber %s receive: %v", sub.ContentConfig.Topic, err)
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return err
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}
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assignment := resp.GetAssignment()
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if assignment != nil {
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glog.V(0).Infof("subscriber %s receive assignment: %v", sub.ContentConfig.Topic, assignment)
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}
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sub.onEachAssignment(assignment)
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}
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return nil
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})
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}
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glog.V(0).Infof("subscriber %s/%s waiting for more assignments", sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup)
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if waitTime < 10*time.Second {
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waitTime += 1 * time.Second
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}
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time.Sleep(waitTime)
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}
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}
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func (sub *TopicSubscriber) onEachAssignment(assignment *mq_pb.SubscriberToSubCoordinatorResponse_Assignment) {
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if assignment == nil {
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return
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}
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// process each partition, with a concurrency limit
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var wg sync.WaitGroup
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semaphore := make(chan struct{}, sub.ProcessorConfig.ConcurrentPartitionLimit)
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for _, assigned := range assignment.AssignedPartitions {
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wg.Add(1)
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semaphore <- struct{}{}
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go func(partition *mq_pb.Partition, broker string) {
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defer wg.Done()
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defer func() { <-semaphore }()
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glog.V(0).Infof("subscriber %s/%s assigned partition %+v at %v", sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup, partition, broker)
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err := sub.onEachPartition(partition, broker)
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if err != nil {
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glog.V(0).Infof("subscriber %s/%s partition %+v at %v: %v", sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup, partition, broker, err)
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}
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}(assigned.Partition, assigned.Broker)
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}
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wg.Wait()
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}
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func (sub *TopicSubscriber) onEachPartition(partition *mq_pb.Partition, broker string) error {
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// connect to the partition broker
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return pb.WithBrokerGrpcClient(true, broker, sub.SubscriberConfig.GrpcDialOption, func(client mq_pb.SeaweedMessagingClient) error {
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subscribeClient, err := client.SubscribeMessage(context.Background(), &mq_pb.SubscribeMessageRequest{
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Message: &mq_pb.SubscribeMessageRequest_Init{
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Init: &mq_pb.SubscribeMessageRequest_InitMessage{
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ConsumerGroup: sub.SubscriberConfig.ConsumerGroup,
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ConsumerId: sub.SubscriberConfig.ConsumerGroupInstanceId,
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Topic: sub.ContentConfig.Topic.ToPbTopic(),
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PartitionOffset: &mq_pb.PartitionOffset{
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Partition: partition,
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StartTsNs: sub.alreadyProcessedTsNs,
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StartType: mq_pb.PartitionOffsetStartType_EARLIEST_IN_MEMORY,
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},
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Filter: sub.ContentConfig.Filter,
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},
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},
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})
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if err != nil {
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return fmt.Errorf("create subscribe client: %v", err)
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}
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glog.V(0).Infof("subscriber %s/%s connected to partition %+v at %v", sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup, partition, broker)
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if sub.OnCompletionFunc != nil {
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defer sub.OnCompletionFunc()
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}
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defer func() {
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subscribeClient.SendMsg(&mq_pb.SubscribeMessageRequest{
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Message: &mq_pb.SubscribeMessageRequest_Ack{
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Ack: &mq_pb.SubscribeMessageRequest_AckMessage{
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Sequence: 0,
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},
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},
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})
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subscribeClient.CloseSend()
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}()
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for {
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// glog.V(0).Infof("subscriber %s/%s/%s waiting for message", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup)
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resp, err := subscribeClient.Recv()
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if err != nil {
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return fmt.Errorf("subscribe recv: %v", err)
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}
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if resp.Message == nil {
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glog.V(0).Infof("subscriber %s/%s received nil message", sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup)
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continue
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}
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switch m := resp.Message.(type) {
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case *mq_pb.SubscribeMessageResponse_Data:
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shouldContinue, processErr := sub.OnEachMessageFunc(m.Data.Key, m.Data.Value)
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if processErr != nil {
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return fmt.Errorf("process error: %v", processErr)
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}
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sub.alreadyProcessedTsNs = m.Data.TsNs
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if !shouldContinue {
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return nil
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}
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case *mq_pb.SubscribeMessageResponse_Ctrl:
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// glog.V(0).Infof("subscriber %s/%s/%s received control %+v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup, m.Ctrl)
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if m.Ctrl.IsEndOfStream || m.Ctrl.IsEndOfTopic {
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return io.EOF
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}
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}
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}
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return nil
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})
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}
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