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throttler.go
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throttler.go
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/*
* ORBIT - Interlink Remote Applications
*
* The MIT License (MIT)
*
* Copyright (c) 2020 Roland Singer <roland.singer[at]desertbit.com>
* Copyright (c) 2020 Sebastian Borchers <sebastian[at]desertbit.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package throttler
import (
"time"
)
type Throttler struct {
duration time.Duration
sub time.Duration
lastTimestamp time.Time
}
func New(duration time.Duration) *Throttler {
return &Throttler{
duration: duration,
}
}
func (t *Throttler) Throttle(now time.Time) (isThrottling bool) {
t.sub = now.Sub(t.lastTimestamp)
if t.sub < t.duration {
return true
}
t.lastTimestamp = now
return false
}
func (t *Throttler) ThrottleSleep(now time.Time) (isThrottling bool) {
t.sub = now.Sub(t.lastTimestamp)
if t.sub < t.duration {
time.Sleep(t.duration - t.sub)
return true
}
t.lastTimestamp = now
return false
}