redis/rate_limit.go

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package redis
import (
"time"
)
type rateLimiter struct {
C chan struct{}
}
func newRateLimiter(limit time.Duration, chanSize int) *rateLimiter {
rl := &rateLimiter{
C: make(chan struct{}, chanSize),
}
for i := 0; i < chanSize; i++ {
rl.C <- struct{}{}
}
go rl.loop(limit)
return rl
}
func (rl *rateLimiter) loop(limit time.Duration) {
for {
select {
case rl.C <- struct{}{}:
default:
}
time.Sleep(limit)
}
}