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580940bf82
* balance partitions on brokers * prepare topic partition first and then publish, move partition * purge unused APIs * clean up * adjust logs * add BalanceTopics() grpc API * configure topic * configure topic command * refactor * repair missing partitions * sequence of operations to ensure ordering * proto to close publishers and consumers * rename file * topic partition versioned by unixTimeNs * create local topic partition * close publishers * randomize the client name * wait until no publishers * logs * close stop publisher channel * send last ack * comments * comment * comments * support list of brokers * add cli options * Update .gitignore * logs * return io.eof directly * refactor * optionally create topic * refactoring * detect consumer disconnection * sub client wait for more messages * subscribe by time stamp * rename * rename to sub_balancer * rename * adjust comments * rename * fix compilation * rename * rename * SubscriberToSubCoordinator * sticky rebalance * go fmt * add tests * balance partitions on brokers * prepare topic partition first and then publish, move partition * purge unused APIs * clean up * adjust logs * add BalanceTopics() grpc API * configure topic * configure topic command * refactor * repair missing partitions * sequence of operations to ensure ordering * proto to close publishers and consumers * rename file * topic partition versioned by unixTimeNs * create local topic partition * close publishers * randomize the client name * wait until no publishers * logs * close stop publisher channel * send last ack * comments * comment * comments * support list of brokers * add cli options * Update .gitignore * logs * return io.eof directly * refactor * optionally create topic * refactoring * detect consumer disconnection * sub client wait for more messages * subscribe by time stamp * rename * rename to sub_balancer * rename * adjust comments * rename * fix compilation * rename * rename * SubscriberToSubCoordinator * sticky rebalance * go fmt * add tests * tracking topic=>broker * merge * comment
49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
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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"log"
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"time"
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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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index := -1
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util.RetryUntil("subscribe", func() error {
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index++
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index = index % len(sub.bootstrapBrokers)
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// ask balancer for brokers of the topic
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if err := sub.doLookup(sub.bootstrapBrokers[index]); 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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if len(sub.brokerPartitionAssignments) == 0 {
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if sub.waitForMoreMessage {
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time.Sleep(1 * time.Second)
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return fmt.Errorf("no broker partition assignments")
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} else {
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return nil
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}
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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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log.Printf("subscriber %s/%s: %v", sub.ContentConfig.Namespace, sub.ContentConfig.Topic, err)
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sub.waitForMoreMessage = false
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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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