-
Notifications
You must be signed in to change notification settings - Fork 0
/
interval_limit.go
67 lines (57 loc) · 1.02 KB
/
interval_limit.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
package guard_pool
import (
"sync/atomic"
"time"
)
type IntervalLimiter struct {
interval time.Duration
last time.Time
token int32
BaseLimiter
}
func NewIntervalLimiter(interval time.Duration) *IntervalLimiter {
il := &IntervalLimiter{
interval: interval,
}
go func() {
il.start()
}()
return il
}
func (i *IntervalLimiter) hit() bool {
swap := atomic.CompareAndSwapInt32(&i.token, 0, 1)
if swap {
return true
} else {
go func() {
i.callSubscribeForRestrictFunc()
}()
return false
}
}
func (i *IntervalLimiter) start() {
i.mu.Lock()
defer i.mu.Unlock()
if i.running {
return
}
i.running = true
ticker := time.NewTicker(i.interval)
go func() {
for {
select {
case <-ticker.C:
swap := atomic.CompareAndSwapInt32(&i.token, 1, 0)
if swap {
i.callSubscribeForResetFunc()
}
}
}
}()
}
func (i *IntervalLimiter) subscribeForRestrict(f func()) {
i.subscribeForRestrictFunc = f
}
func (i *IntervalLimiter) subscribeForReset(f func()) {
i.subscribeForResetFunc = f
}