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