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