Re: [milo-dev] [Q] How to keep the specified sampling interval accuratel

[Shigeru Ishida <ishida_shigeru@xxxxxxxxxxx>]

OK. However, it seems to be a hard work.
Anyway, thank you.

<kevinherron@xxxxxxxxx> wrote, Tue, 31 Oct 2017 04:57:03 -0700

> SubscriptionModel is only meant to server as a naive example of how you
> might sample your underlying data source.
> 
> I expect users to implement their own more sophisticated approach to
> sampling. Ideally, one that accurately tracks how long sampling took and
> can adjust its next execution, as you suggest, and also samples the data
> without resorting to calling read() on the namespace.
> 
> At work, our underlying data sources are PLCs, so I've developed a
> "RequestExecutor" system that handles scheduling these requests to the PLC
> and accounts for the latency of each request as it re-schedules the next
> execution. I'm not able to open source this work right now, but it's not
> all that complicated to build on your own.
> 
> On Mon, Oct 30, 2017 at 9:34 PM, Shigeru Ishida <ishida_shigeru@xxxxxxxxxxx>
> wrote:
> 
> > Hi Kevin,
> >
> > Is there a way to keep the specified sampling interval accurately
> > when developing a server ? For example, when 100 (msec) is specified,
> > it took 110 (msec), so the next sampling is done at 90 (msec).
> >
> > Looking at the code of SubscriptionModel.java, it seems difficult
> > because it uses ScheduledExecutorService.
> >
> > Regards,
> >
> > --Shigeru
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