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manager.go
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manager.go
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// Copyright 2021 GoEdge goedge.cdn@gmail.com. All rights reserved.
package expires
import (
"github.com/TeaOSLab/EdgeNode/internal/utils/goman"
"github.com/TeaOSLab/EdgeNode/internal/utils/zero"
"sync"
"time"
)
var SharedManager = NewManager()
type Manager struct {
listMap map[*List]zero.Zero
locker sync.Mutex
ticker *time.Ticker
}
func NewManager() *Manager {
var manager = &Manager{
listMap: map[*List]zero.Zero{},
ticker: time.NewTicker(1 * time.Second),
}
goman.New(func() {
manager.init()
})
return manager
}
func (this *Manager) init() {
var lastTimestamp = int64(0)
for range this.ticker.C {
var currentTime = time.Now().Unix()
if lastTimestamp == 0 {
lastTimestamp = currentTime - 86400 // prevent timezone changes
}
if currentTime >= lastTimestamp {
for i := lastTimestamp; i <= currentTime; i++ {
this.locker.Lock()
for list := range this.listMap {
list.GC(i)
}
this.locker.Unlock()
}
} else {
// 如果过去的时间比现在大,则从这一秒重新开始
for i := currentTime; i <= currentTime; i++ {
this.locker.Lock()
for list := range this.listMap {
list.GC(i)
}
this.locker.Unlock()
}
}
// 这样做是为了防止系统时钟突变
lastTimestamp = currentTime
}
}
func (this *Manager) Add(list *List) {
this.locker.Lock()
this.listMap[list] = zero.New()
this.locker.Unlock()
}
func (this *Manager) Remove(list *List) {
this.locker.Lock()
delete(this.listMap, list)
this.locker.Unlock()
}