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From Rui Tang <tangrui...@gmail.com>
Subject Re: Question about Window
Date Thu, 13 Jul 2017 02:06:14 GMT
Thank you Jagadish.

It is a very simple workaround.

Looking forward for the high level api to support windowing and triggers.

On Thu, Jul 13, 2017 at 1:33 AM Jagadish Venkatraman <jagadish1989@gmail.com>
wrote:

> Hi Rui,
>
> Are you using the low-level API or the high-level API? The high-level API (
> *StreamApplication*) that offers built-in support for windows/triggers is
> currently in preview stage, and we are working to make it production ready
> with the next release.
>
> It looks like you are referring to the low-level *WindowableTask* API. In
> this API, you are guaranteed a periodic callback after every
> *windowMs* milliseconds.
> It should be possible (with minimal effort) to implement Calendar windowing
> on top of this - you can set a low value for *task.window.ms
> <http://task.window.ms> *and periodically evaluate inside *window *if
> results should be emitted based on Calendar time.
>
> Please do let us know if you had further questions.
>
> Best,
> Jagadish
>
>
>
> On Wed, Jul 12, 2017 at 6:57 AM, Rui Tang <tangrui.cn@gmail.com> wrote:
>
> > According to the windowing (
> >
> http://samza.apache.org/learn/documentation/0.13/container/windowing.html)
> > documentation, I know that I can specify a fixed duration window, like
> > 8640000ms (one day). That means if the window starts at 9:00 AM, then it
> > will end at 9:00 AM the next day.
> >
> > But I need a kind of window that overlaps some calendar day, that means
> > whenever the window starts, it will end at the end of the day. How can I
> do
> > this using Samza windowing system? Do I need to create my own window and
> > trigger implementation?
> >
> > Thank you!
> >
>
>
>
> --
> Jagadish V,
> Graduate Student,
> Department of Computer Science,
> Stanford University
>

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