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33 lines
943 B
33 lines
943 B
package sub_client
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import (
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/util"
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"io"
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)
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// Subscribe subscribes to a topic's specified partitions.
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// If a partition is moved to another broker, the subscriber will automatically reconnect to the new broker.
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func (sub *TopicSubscriber) Subscribe() error {
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util.RetryUntil("subscribe", func() error {
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// ask balancer for brokers of the topic
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if err := sub.doLookup(sub.bootstrapBroker); err != nil {
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return fmt.Errorf("lookup topic %s/%s: %v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, err)
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}
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// treat the first broker as the topic leader
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// connect to the leader broker
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// subscribe to the topic
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if err := sub.doProcess(); err != nil {
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return fmt.Errorf("subscribe topic %s/%s: %v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, err)
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}
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return nil
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}, func(err error) bool {
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if err == io.EOF {
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return false
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}
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return true
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})
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return nil
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}
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