seaweedfs/weed/mq/sub_coordinator/coordinator.go

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Merge accumulated changes related to message queue (#5098) * 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
2023-12-11 20:05:54 +00:00
package sub_coordinator
import (
cmap "github.com/orcaman/concurrent-map/v2"
"github.com/seaweedfs/seaweedfs/weed/mq/pub_balancer"
"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
)
type TopicConsumerGroups struct {
// map a consumer group name to a consumer group
ConsumerGroups cmap.ConcurrentMap[string, *ConsumerGroup]
}
// Coordinator coordinates the instances in the consumer group for one topic.
// It is responsible for:
// 1. (Maybe) assigning partitions when a consumer instance is up/down.
type Coordinator struct {
// map topic name to consumer groups
TopicSubscribers cmap.ConcurrentMap[string, *TopicConsumerGroups]
balancer *pub_balancer.Balancer
}
func NewCoordinator(balancer *pub_balancer.Balancer) *Coordinator {
return &Coordinator{
TopicSubscribers: cmap.New[*TopicConsumerGroups](),
balancer: balancer,
}
}
func (c *Coordinator) GetTopicConsumerGroups(topic *mq_pb.Topic) *TopicConsumerGroups {
topicName := toTopicName(topic)
tcg, _ := c.TopicSubscribers.Get(topicName)
if tcg == nil {
tcg = &TopicConsumerGroups{
ConsumerGroups: cmap.New[*ConsumerGroup](),
}
c.TopicSubscribers.Set(topicName, tcg)
}
return tcg
}
func (c *Coordinator) RemoveTopic(topic *mq_pb.Topic) {
topicName := toTopicName(topic)
c.TopicSubscribers.Remove(topicName)
}
func toTopicName(topic *mq_pb.Topic) string {
topicName := topic.Namespace + "." + topic.Name
return topicName
}
func (c *Coordinator) AddSubscriber(consumerGroup, consumerGroupInstance string, topic *mq_pb.Topic) *ConsumerGroupInstance{
tcg := c.GetTopicConsumerGroups(topic)
cg, _ := tcg.ConsumerGroups.Get(consumerGroup)
if cg == nil {
cg = NewConsumerGroup()
tcg.ConsumerGroups.Set(consumerGroup, cg)
}
cgi, _ := cg.ConsumerGroupInstances.Get(consumerGroupInstance)
if cgi == nil {
cgi = NewConsumerGroupInstance(consumerGroupInstance)
cg.ConsumerGroupInstances.Set(consumerGroupInstance, cgi)
}
cg.OnAddConsumerGroupInstance(consumerGroupInstance, topic)
return cgi
}
func (c *Coordinator) RemoveSubscriber(consumerGroup, consumerGroupInstance string, topic *mq_pb.Topic) {
tcg, _ := c.TopicSubscribers.Get(toTopicName(topic))
if tcg == nil {
return
}
cg, _ := tcg.ConsumerGroups.Get(consumerGroup)
if cg == nil {
return
}
cg.ConsumerGroupInstances.Remove(consumerGroupInstance)
cg.OnRemoveConsumerGroupInstance(consumerGroupInstance, topic)
if cg.ConsumerGroupInstances.Count() == 0 {
tcg.ConsumerGroups.Remove(consumerGroup)
}
if tcg.ConsumerGroups.Count() == 0 {
c.RemoveTopic(topic)
}
}