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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
54 lines
1.8 KiB
Go
54 lines
1.8 KiB
Go
package pub_balancer
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import (
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"errors"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
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)
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var (
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ErrNoBroker = errors.New("no broker")
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)
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func (balancer *Balancer) LookupOrAllocateTopicPartitions(topic *mq_pb.Topic, publish bool, partitionCount int32) (assignments []*mq_pb.BrokerPartitionAssignment, err error) {
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if partitionCount == 0 {
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partitionCount = 6
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}
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// find existing topic partition assignments
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for brokerStatsItem := range balancer.Brokers.IterBuffered() {
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broker, brokerStats := brokerStatsItem.Key, brokerStatsItem.Val
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for topicPartitionStatsItem := range brokerStats.TopicPartitionStats.IterBuffered() {
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topicPartitionStat := topicPartitionStatsItem.Val
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if topicPartitionStat.TopicPartition.Namespace == topic.Namespace &&
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topicPartitionStat.TopicPartition.Name == topic.Name {
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assignment := &mq_pb.BrokerPartitionAssignment{
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Partition: &mq_pb.Partition{
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RingSize: MaxPartitionCount,
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RangeStart: topicPartitionStat.RangeStart,
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RangeStop: topicPartitionStat.RangeStop,
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},
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}
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// TODO fix follower setting
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assignment.LeaderBroker = broker
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assignments = append(assignments, assignment)
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}
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}
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}
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if len(assignments) > 0 && len(assignments) == int(partitionCount) || !publish {
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glog.V(0).Infof("existing topic partitions %d: %v", len(assignments), assignments)
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return assignments, nil
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}
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// find the topic partitions on the filer
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// if the topic is not found
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// if the request is_for_publish
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// create the topic
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// if the request is_for_subscribe
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// return error not found
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// t := topic.FromPbTopic(request.Topic)
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if balancer.Brokers.IsEmpty() {
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return nil, ErrNoBroker
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}
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return allocateTopicPartitions(balancer.Brokers, partitionCount), nil
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}
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