func (self *chainSamplerFactory) NewSampler(param *StatsParameter) (sampling.Sampler, error) {
s := sampling.NewChainSampler(param.NumSamples, param.WindowSize)
if param.ResetPeriod.Seconds() > 1.0 {
s = sampling.NewPeriodcallyResetSampler(param.ResetPeriod, s)
}
return s, nil
}
func (self *reservoirSamplerFactory) NewSampler(param *StatsParameter) (sampling.Sampler, error) {
s := sampling.NewReservoirSampler(param.NumSamples)
if param.ResetPeriod.Seconds() > 1.0 {
s = sampling.NewPeriodcallyResetSampler(param.ResetPeriod, s)
}
return s, nil
}
func (self *esSamplerFactory) NewSampler(param *StatsParameter) (sampling.Sampler, error) {
s := sampling.NewESSampler(param.NumSamples, func(d interface{}) float64 {
stats := d.(*info.ContainerStats)
delta := self.startTime.Sub(stats.Timestamp)
return delta.Seconds()
})
if param.ResetPeriod.Seconds() > 1.0 {
s = sampling.NewPeriodcallyResetSampler(param.ResetPeriod, s)
}
return s, nil
}