You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
2.7 KiB
65 lines
2.7 KiB
package broker
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import (
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/mq/logstore"
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"github.com/seaweedfs/seaweedfs/weed/mq/pub_balancer"
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"github.com/seaweedfs/seaweedfs/weed/mq/topic"
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"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
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)
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func (b *MessageQueueBroker) GetOrGenerateLocalPartition(t topic.Topic, partition topic.Partition) (localTopicPartition *topic.LocalPartition, getOrGenError error) {
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// get or generate a local partition
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conf, readConfErr := b.fca.ReadTopicConfFromFiler(t)
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if readConfErr != nil {
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glog.Errorf("topic %v not found: %v", t, readConfErr)
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return nil, fmt.Errorf("topic %v not found: %v", t, readConfErr)
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}
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localTopicPartition, _, getOrGenError = b.doGetOrGenLocalPartition(t, partition, conf)
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if getOrGenError != nil {
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glog.Errorf("topic %v partition %v not setup: %v", t, partition, getOrGenError)
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return nil, fmt.Errorf("topic %v partition %v not setup: %v", t, partition, getOrGenError)
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}
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return localTopicPartition, nil
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}
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func (b *MessageQueueBroker) doGetOrGenLocalPartition(t topic.Topic, partition topic.Partition, conf *mq_pb.ConfigureTopicResponse) (localPartition *topic.LocalPartition, isGenerated bool, err error) {
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b.accessLock.Lock()
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defer b.accessLock.Unlock()
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if localPartition = b.localTopicManager.GetLocalPartition(t, partition); localPartition == nil {
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localPartition, isGenerated, err = b.genLocalPartitionFromFiler(t, partition, conf)
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if err != nil {
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return nil, false, err
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}
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}
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return localPartition, isGenerated, nil
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}
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func (b *MessageQueueBroker) genLocalPartitionFromFiler(t topic.Topic, partition topic.Partition, conf *mq_pb.ConfigureTopicResponse) (localPartition *topic.LocalPartition, isGenerated bool, err error) {
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self := b.option.BrokerAddress()
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for _, assignment := range conf.BrokerPartitionAssignments {
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if assignment.LeaderBroker == string(self) && partition.Equals(topic.FromPbPartition(assignment.Partition)) {
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localPartition = topic.NewLocalPartition(partition, b.genLogFlushFunc(t, partition), logstore.GenMergedReadFunc(b, t, partition))
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b.localTopicManager.AddLocalPartition(t, localPartition)
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isGenerated = true
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break
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}
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}
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return localPartition, isGenerated, nil
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}
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func (b *MessageQueueBroker) ensureTopicActiveAssignments(t topic.Topic, conf *mq_pb.ConfigureTopicResponse) (err error) {
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// also fix assignee broker if invalid
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hasChanges := pub_balancer.EnsureAssignmentsToActiveBrokers(b.PubBalancer.Brokers, 1, conf.BrokerPartitionAssignments)
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if hasChanges {
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glog.V(0).Infof("topic %v partition updated assignments: %v", t, conf.BrokerPartitionAssignments)
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if err = b.fca.SaveTopicConfToFiler(t, conf); err != nil {
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return err
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}
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}
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return err
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}
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