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package sub_client
import (
"context"
"fmt"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/pb"
"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
"io"
"reflect"
"time"
)
type KeyedOffset struct {
Key []byte
Offset int64
}
func (sub *TopicSubscriber) onEachPartition(assigned *mq_pb.BrokerPartitionAssignment, stopCh chan struct{}, onDataMessageFn OnDataMessageFn) error {
// connect to the partition broker
return pb.WithBrokerGrpcClient(true, assigned.LeaderBroker, sub.SubscriberConfig.GrpcDialOption, func(client mq_pb.SeaweedMessagingClient) error {
subscribeClient, err := client.SubscribeMessage(context.Background())
if err != nil {
return fmt.Errorf("create subscribe client: %v", err)
}
slidingWindowSize := sub.SubscriberConfig.SlidingWindowSize
if slidingWindowSize <= 0 {
slidingWindowSize = 1
}
po := findPartitionOffset(sub.ContentConfig.PartitionOffsets, assigned.Partition)
if po == nil {
po = &schema_pb.PartitionOffset{
Partition: assigned.Partition,
StartTsNs: time.Now().UnixNano(),
StartType: schema_pb.PartitionOffsetStartType_EARLIEST_IN_MEMORY,
}
}
if err = subscribeClient.Send(&mq_pb.SubscribeMessageRequest{
Message: &mq_pb.SubscribeMessageRequest_Init{
Init: &mq_pb.SubscribeMessageRequest_InitMessage{
ConsumerGroup: sub.SubscriberConfig.ConsumerGroup,
ConsumerId: sub.SubscriberConfig.ConsumerGroupInstanceId,
Topic: sub.ContentConfig.Topic.ToPbTopic(),
PartitionOffset: po,
Filter: sub.ContentConfig.Filter,
FollowerBroker: assigned.FollowerBroker,
SlidingWindowSize: slidingWindowSize,
},
},
}); err != nil {
glog.V(0).Infof("subscriber %s connected to partition %+v at %v: %v", sub.ContentConfig.Topic, assigned.Partition, assigned.LeaderBroker, err)
}
glog.V(0).Infof("subscriber %s connected to partition %+v at %v", sub.ContentConfig.Topic, assigned.Partition, assigned.LeaderBroker)
if sub.OnCompletionFunc != nil {
defer sub.OnCompletionFunc()
}
go func() {
for {
select {
case <-stopCh:
subscribeClient.CloseSend()
return
case ack, ok := <-sub.PartitionOffsetChan:
if !ok {
subscribeClient.CloseSend()
return
}
subscribeClient.SendMsg(&mq_pb.SubscribeMessageRequest{
Message: &mq_pb.SubscribeMessageRequest_Ack{
Ack: &mq_pb.SubscribeMessageRequest_AckMessage{
Key: ack.Key,
Sequence: ack.Offset,
},
},
})
}
}
}()
for {
// glog.V(0).Infof("subscriber %s/%s/%s waiting for message", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup)
resp, err := subscribeClient.Recv()
if err != nil {
return fmt.Errorf("subscribe recv: %v", err)
}
if resp.Message == nil {
glog.V(0).Infof("subscriber %s/%s received nil message", sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup)
continue
}
switch m := resp.Message.(type) {
case *mq_pb.SubscribeMessageResponse_Data:
if m.Data.Ctrl != nil {
glog.V(2).Infof("subscriber %s received control from producer:%s isClose:%v", sub.SubscriberConfig.ConsumerGroup, m.Data.Ctrl.PublisherName, m.Data.Ctrl.IsClose)
continue
}
if len(m.Data.Key) == 0 {
fmt.Printf("empty key %+v, type %v\n", m, reflect.TypeOf(m))
continue
}
onDataMessageFn(m)
case *mq_pb.SubscribeMessageResponse_Ctrl:
// glog.V(0).Infof("subscriber %s/%s/%s received control %+v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, sub.SubscriberConfig.ConsumerGroup, m.Ctrl)
if m.Ctrl.IsEndOfStream || m.Ctrl.IsEndOfTopic {
return io.EOF
}
}
}
})
}
func findPartitionOffset(partitionOffsets []*schema_pb.PartitionOffset, partition *schema_pb.Partition) *schema_pb.PartitionOffset {
for _, po := range partitionOffsets {
if po.Partition == partition {
return po
}
}
return nil
}
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