seaweedfs/weed/mq/client/sub_client/subscribe.go

34 lines
943 B
Go
Raw Normal View History

2023-08-28 16:02:12 +00:00
package sub_client
import (
2023-09-01 07:36:51 +00:00
"fmt"
2023-10-01 18:59:19 +00:00
"github.com/seaweedfs/seaweedfs/weed/util"
"io"
2023-08-28 16:02:12 +00:00
)
2023-09-05 04:43:50 +00:00
// Subscribe subscribes to a topic's specified partitions.
// If a partition is moved to another broker, the subscriber will automatically reconnect to the new broker.
2023-08-28 16:02:12 +00:00
2023-09-05 04:43:50 +00:00
func (sub *TopicSubscriber) Subscribe() error {
2023-10-01 18:59:19 +00:00
util.RetryUntil("subscribe", func() error {
2023-10-02 08:02:27 +00:00
// ask balancer for brokers of the topic
2023-10-01 18:59:19 +00:00
if err := sub.doLookup(sub.bootstrapBroker); err != nil {
return fmt.Errorf("lookup topic %s/%s: %v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, err)
2023-09-01 07:36:51 +00:00
}
2023-10-02 08:02:27 +00:00
// treat the first broker as the topic leader
// connect to the leader broker
// subscribe to the topic
2023-10-01 18:59:19 +00:00
if err := sub.doProcess(); err != nil {
return fmt.Errorf("subscribe topic %s/%s: %v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, err)
2023-09-01 07:36:51 +00:00
}
2023-10-01 18:59:19 +00:00
return nil
}, func(err error) bool {
if err == io.EOF {
return false
}
return true
})
2023-09-01 07:36:51 +00:00
return nil
2023-08-28 16:02:12 +00:00
}