go-libp2p-pubsub/subscription.go
2018-01-13 12:13:54 +02:00

38 lines
563 B
Go

package floodsub
import (
"context"
"time"
)
type Subscription struct {
topic string
ch chan *Message
cancelCh chan<- *Subscription
err error
validate Validator
validateTimeout time.Duration
}
func (sub *Subscription) Topic() string {
return sub.topic
}
func (sub *Subscription) Next(ctx context.Context) (*Message, error) {
select {
case msg, ok := <-sub.ch:
if !ok {
return msg, sub.err
}
return msg, nil
case <-ctx.Done():
return nil, ctx.Err()
}
}
func (sub *Subscription) Cancel() {
sub.cancelCh <- sub
}