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package broker
import (
"sync"
)
type TopicPartitionSubscription struct {
sync.Mutex
name string
lastReadTsNs int64
cond *sync.Cond
}
func NewTopicPartitionSubscription(name string) *TopicPartitionSubscription {
t := &TopicPartitionSubscription{
name: name,
}
t.cond = sync.NewCond(t)
return t
}
func (s *TopicPartitionSubscription) Wait() {
s.Mutex.Lock()
s.cond.Wait()
s.Mutex.Unlock()
}
func (s *TopicPartitionSubscription) NotifyOne() {
// notify one waiting goroutine
s.cond.Signal()
}
type TopicPartitionSubscriptions struct {
sync.Mutex
cond *sync.Cond
subscriptions map[string]*TopicPartitionSubscription
subscriptionsLock sync.RWMutex
}
func NewTopicPartitionSubscriptions() *TopicPartitionSubscriptions {
m := &TopicPartitionSubscriptions{
subscriptions: make(map[string]*TopicPartitionSubscription),
}
m.cond = sync.NewCond(m)
return m
}
func (m *TopicPartitionSubscriptions) AddSubscription(subscription string) *TopicPartitionSubscription {
m.subscriptionsLock.Lock()
defer m.subscriptionsLock.Unlock()
if s, found := m.subscriptions[subscription]; found {
return s
}
s := NewTopicPartitionSubscription(subscription)
m.subscriptions[subscription] = s
return s
}
func (m *TopicPartitionSubscriptions) NotifyAll() {
m.subscriptionsLock.RLock()
defer m.subscriptionsLock.RUnlock()
for name, tps := range m.subscriptions {
println("notifying", name)
tps.NotifyOne()
}
}
func (m *TopicPartitionSubscriptions) Wait() {
m.Mutex.Lock()
m.cond.Wait()
for _, tps := range m.subscriptions {
tps.NotifyOne()
}
m.Mutex.Unlock()
}
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