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65 lines
1.9 KiB
Go
65 lines
1.9 KiB
Go
package sub_coordinator
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import (
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cmap "github.com/orcaman/concurrent-map/v2"
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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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"time"
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)
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type ConsumerGroupInstance struct {
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InstanceId string
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// the consumer group instance may not have an active partition
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Partitions []*topic.Partition
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ResponseChan chan *mq_pb.SubscriberToSubCoordinatorResponse
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}
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type ConsumerGroup struct {
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// map a consumer group instance id to a consumer group instance
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ConsumerGroupInstances cmap.ConcurrentMap[string, *ConsumerGroupInstance]
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mapping *PartitionConsumerMapping
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reBalanceTimer *time.Timer
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}
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func NewConsumerGroup() *ConsumerGroup {
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return &ConsumerGroup{
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ConsumerGroupInstances: cmap.New[*ConsumerGroupInstance](),
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mapping: NewPartitionConsumerMapping(pub_balancer.MaxPartitionCount),
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}
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}
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func NewConsumerGroupInstance(instanceId string) *ConsumerGroupInstance {
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return &ConsumerGroupInstance{
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InstanceId: instanceId,
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ResponseChan: make(chan *mq_pb.SubscriberToSubCoordinatorResponse, 1),
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}
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}
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func (cg *ConsumerGroup) OnAddConsumerGroupInstance(consumerGroupInstance string, topic *mq_pb.Topic) {
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cg.onConsumerGroupInstanceChange()
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}
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func (cg *ConsumerGroup) OnRemoveConsumerGroupInstance(consumerGroupInstance string, topic *mq_pb.Topic) {
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cg.onConsumerGroupInstanceChange()
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}
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func (cg *ConsumerGroup) onConsumerGroupInstanceChange(){
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if cg.reBalanceTimer != nil {
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cg.reBalanceTimer.Stop()
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cg.reBalanceTimer = nil
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}
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cg.reBalanceTimer = time.AfterFunc(5*time.Second, func() {
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cg.Rebalance()
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cg.reBalanceTimer = nil
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})
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}
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func (cg *ConsumerGroup) OnPartitionListChange() {
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if cg.reBalanceTimer != nil {
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cg.reBalanceTimer.Stop()
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cg.reBalanceTimer = nil
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}
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cg.Rebalance()
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}
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func (cg *ConsumerGroup) Rebalance() {
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println("rebalance...")
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}
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