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87 lines
2.5 KiB
87 lines
2.5 KiB
package agent_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/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/schema_pb"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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)
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type SubscribeOption struct {
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ConsumerGroup string
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ConsumerGroupInstanceId string
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Topic topic.Topic
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OffsetType schema_pb.OffsetType
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OffsetTsNs int64
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Filter string
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MaxSubscribedPartitions int32
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SlidingWindowSize int32
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}
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type SubscribeSession struct {
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Option *SubscribeOption
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stream grpc.BidiStreamingClient[mq_agent_pb.SubscribeRecordRequest, mq_agent_pb.SubscribeRecordResponse]
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}
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func NewSubscribeSession(agentAddress string, option *SubscribeOption) (*SubscribeSession, error) {
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// call local agent grpc server to create a new session
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clientConn, err := grpc.NewClient(agentAddress, grpc.WithTransportCredentials(insecure.NewCredentials()))
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if err != nil {
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return nil, fmt.Errorf("dial agent server %s: %v", agentAddress, err)
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}
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agentClient := mq_agent_pb.NewSeaweedMessagingAgentClient(clientConn)
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initRequest := &mq_agent_pb.SubscribeRecordRequest_InitSubscribeRecordRequest{
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ConsumerGroup: option.ConsumerGroup,
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ConsumerGroupInstanceId: option.ConsumerGroupInstanceId,
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Topic: &schema_pb.Topic{
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Namespace: option.Topic.Namespace,
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Name: option.Topic.Name,
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},
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OffsetType: option.OffsetType,
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OffsetTsNs: option.OffsetTsNs,
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MaxSubscribedPartitions: option.MaxSubscribedPartitions,
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Filter: option.Filter,
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SlidingWindowSize: option.SlidingWindowSize,
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}
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stream, err := agentClient.SubscribeRecord(context.Background())
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if err != nil {
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return nil, fmt.Errorf("subscribe record: %w", err)
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}
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if err = stream.Send(&mq_agent_pb.SubscribeRecordRequest{
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Init: initRequest,
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}); err != nil {
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return nil, fmt.Errorf("send session id: %w", err)
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}
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return &SubscribeSession{
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Option: option,
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stream: stream,
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}, nil
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}
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func (s *SubscribeSession) CloseSession() error {
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err := s.stream.CloseSend()
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return err
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}
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func (a *SubscribeSession) SubscribeMessageRecord(
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onEachMessageFn func(key []byte, record *schema_pb.RecordValue),
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onCompletionFn func()) error {
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for {
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resp, err := a.stream.Recv()
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if err != nil {
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return err
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}
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onEachMessageFn(resp.Key, resp.Value)
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}
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if onCompletionFn != nil {
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onCompletionFn()
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}
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return nil
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}
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