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package topic
import "sync"
type LocalTopic struct {
Topic
Partitions []*LocalPartition
partitionLock sync.RWMutex
}
func NewLocalTopic(topic Topic) *LocalTopic {
return &LocalTopic{
Topic: topic,
Partitions: make([]*LocalPartition, 0),
}
}
func (localTopic *LocalTopic) findPartition(partition Partition) *LocalPartition {
localTopic.partitionLock.RLock()
defer localTopic.partitionLock.RUnlock()
for _, localPartition := range localTopic.Partitions {
if localPartition.Partition.Equals(partition) {
return localPartition
}
}
return nil
}
func (localTopic *LocalTopic) removePartition(partition Partition) bool {
localTopic.partitionLock.Lock()
defer localTopic.partitionLock.Unlock()
foundPartitionIndex := -1
for i, localPartition := range localTopic.Partitions {
if localPartition.Partition.Equals(partition) {
foundPartitionIndex = i
localPartition.Shutdown()
break
}
}
if foundPartitionIndex == -1 {
return false
}
localTopic.Partitions = append(localTopic.Partitions[:foundPartitionIndex], localTopic.Partitions[foundPartitionIndex+1:]...)
return true
}
func (localTopic *LocalTopic) addPartition(localPartition *LocalPartition) {
localTopic.partitionLock.Lock()
defer localTopic.partitionLock.Unlock()
for _, partition := range localTopic.Partitions {
if localPartition.Partition.Equals(partition.Partition) {
return
}
}
localTopic.Partitions = append(localTopic.Partitions, localPartition)
}
func (localTopic *LocalTopic) closePartitionPublishers(unixTsNs int64) bool {
var wg sync.WaitGroup
for _, localPartition := range localTopic.Partitions {
if localPartition.UnixTimeNs != unixTsNs {
continue
}
wg.Add(1)
go func(localPartition *LocalPartition) {
defer wg.Done()
localPartition.closePublishers()
}(localPartition)
}
wg.Wait()
return true
}
func (localTopic *LocalTopic) closePartitionSubscribers(unixTsNs int64) bool {
var wg sync.WaitGroup
for _, localPartition := range localTopic.Partitions {
if localPartition.UnixTimeNs != unixTsNs {
continue
}
wg.Add(1)
go func(localPartition *LocalPartition) {
defer wg.Done()
localPartition.closeSubscribers()
}(localPartition)
}
wg.Wait()
return true
}
func (localTopic *LocalTopic) WaitUntilNoPublishers() {
for {
var wg sync.WaitGroup
for _, localPartition := range localTopic.Partitions {
wg.Add(1)
go func(localPartition *LocalPartition) {
defer wg.Done()
localPartition.WaitUntilNoPublishers()
}(localPartition)
}
wg.Wait()
if len(localTopic.Partitions) == 0 {
return
}
}
}
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