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105 lines
3.0 KiB
105 lines
3.0 KiB
package agent
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import (
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"context"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/mq/client/sub_client"
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"github.com/seaweedfs/seaweedfs/weed/mq/topic"
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"github.com/seaweedfs/seaweedfs/weed/pb/mq_agent_pb"
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"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
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"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
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"github.com/seaweedfs/seaweedfs/weed/util"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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"google.golang.org/protobuf/proto"
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)
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func (a *MessageQueueAgent) SubscribeRecord(stream mq_agent_pb.SeaweedMessagingAgent_SubscribeRecordServer) error {
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// the first message is the subscribe request
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// it should only contain the session id
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initMessage, err := stream.Recv()
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if err != nil {
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return err
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}
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subscriber := a.handleInitSubscribeRecordRequest(stream.Context(), initMessage.Init)
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var lastErr error
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executors := util.NewLimitedConcurrentExecutor(int(subscriber.SubscriberConfig.SlidingWindowSize))
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subscriber.SetOnDataMessageFn(func(m *mq_pb.SubscribeMessageResponse_Data) {
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executors.Execute(func() {
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record := &schema_pb.RecordValue{}
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err := proto.Unmarshal(m.Data.Value, record)
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if err != nil {
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glog.V(0).Infof("unmarshal record value: %v", err)
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if lastErr == nil {
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lastErr = err
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}
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return
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}
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if sendErr := stream.Send(&mq_agent_pb.SubscribeRecordResponse{
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Key: m.Data.Key,
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Value: record,
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TsNs: m.Data.TsNs,
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}); sendErr != nil {
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glog.V(0).Infof("send record: %v", sendErr)
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if lastErr == nil {
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lastErr = sendErr
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}
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}
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})
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})
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go func() {
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subErr := subscriber.Subscribe()
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if subErr != nil {
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glog.V(0).Infof("subscriber %s subscribe: %v", subscriber.SubscriberConfig.String(), subErr)
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if lastErr == nil {
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lastErr = subErr
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}
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}
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}()
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for {
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m, err := stream.Recv()
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if err != nil {
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glog.V(0).Infof("subscriber %d receive: %v", subscriber.SubscriberConfig.String(), err)
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return err
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}
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if m != nil {
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subscriber.PartitionOffsetChan <- sub_client.KeyedOffset{
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Key: m.AckKey,
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Offset: m.AckSequence,
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}
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}
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}
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}
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func (a *MessageQueueAgent) handleInitSubscribeRecordRequest(ctx context.Context, req *mq_agent_pb.SubscribeRecordRequest_InitSubscribeRecordRequest) *sub_client.TopicSubscriber {
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subscriberConfig := &sub_client.SubscriberConfiguration{
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ConsumerGroup: req.ConsumerGroup,
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ConsumerGroupInstanceId: req.ConsumerGroupInstanceId,
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GrpcDialOption: grpc.WithTransportCredentials(insecure.NewCredentials()),
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MaxPartitionCount: req.MaxSubscribedPartitions,
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SlidingWindowSize: req.SlidingWindowSize,
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}
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contentConfig := &sub_client.ContentConfiguration{
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Topic: topic.FromPbTopic(req.Topic),
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Filter: req.Filter,
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PartitionOffsets: req.PartitionOffsets,
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OffsetType: schema_pb.OffsetType_EXACT_TS_NS,
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OffsetTsNs: 0,
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}
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topicSubscriber := sub_client.NewTopicSubscriber(
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ctx,
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a.brokersList(),
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subscriberConfig,
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contentConfig,
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make(chan sub_client.KeyedOffset, 1024),
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)
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return topicSubscriber
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}
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