forked from google/cadvisor
/
autoreset.go
60 lines (51 loc) · 1.49 KB
/
autoreset.go
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// Copyright 2014 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package sampling
import "time"
type autoResetSampler struct {
shouldReset func(d interface{}) bool
sampler Sampler
}
func (self *autoResetSampler) Len() int {
return self.sampler.Len()
}
func (self *autoResetSampler) Reset() {
self.sampler.Reset()
}
func (self *autoResetSampler) Map(f func(d interface{})) {
self.sampler.Map(f)
}
func (self *autoResetSampler) Filter(filter func(d interface{}) bool) {
self.sampler.Filter(filter)
}
func (self *autoResetSampler) Update(d interface{}) {
if self.shouldReset(d) {
self.sampler.Reset()
}
self.sampler.Update(d)
}
func NewPeriodicallyResetSampler(period time.Duration, sampler Sampler) Sampler {
lastRest := time.Now()
shouldReset := func(d interface{}) bool {
if time.Now().Sub(lastRest) > period {
lastRest = time.Now()
return true
}
return false
}
return &autoResetSampler{
shouldReset: shouldReset,
sampler: sampler,
}
}