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listener.go
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listener.go
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package client
import (
"sync"
)
func newListenerStore() *listenerStore {
return &listenerStore{
listeners: []*Listener{},
}
}
type listenerStore struct {
sync.Mutex
listeners []*Listener
}
func (store *listenerStore) Add(listener *Listener) {
store.Lock()
defer store.Unlock()
store.listeners = append(store.listeners, listener)
}
func (store *listenerStore) Listeners() []*Listener {
store.Lock()
defer store.Unlock()
return store.listeners
}
func (store *listenerStore) gc() {
store.Lock()
defer store.Unlock()
oldListeners := store.listeners
store.listeners = []*Listener{}
for _, listener := range oldListeners {
if listener.IsActive() {
store.listeners = append(store.listeners, listener)
}
}
}
type Listener struct {
mu sync.Mutex
isActive bool
Updates chan Type
}
func (listener *Listener) Close() {
listener.mu.Lock()
defer listener.mu.Unlock()
listener.isActive = false
close(listener.Updates)
}
func (listener *Listener) IsActive() bool {
listener.mu.Lock()
defer listener.mu.Unlock()
return listener.isActive
}