Hi, I’m afraid this is not possible right now. I’m also not sure about the Evictors as a whole. Using them makes window operations very slow because all elements in a window have to be kept, i.e. window results cannot be pre-aggregated.
Cheers, Aljoscha > On 15 Dec 2015, at 12:23, Radu Tudoran <radu.tudo...@huawei.com> wrote: > > Hi, > > I believe this question might have been asked before - so sorry for repeating > it (I just did not find the discussion on the mailing list). > > Is it possible somehow to create a new DataStream from the elements that are > evicted from a window? > > A simple use case for this is: > We have data coming from a sensor every second. We want to compute all the > times the average on the last 5 seconds and on the interval from 5 seconds > ago until 10 seconds ago. > I would be interested in how the data evicted from the main window that keeps > the fresh data could be feed into a new stream on which I could apply again a > window of 5 seconds. > (Having a 10 seconds window and selecting only the most ancient 5 second data > is not a viable option) > > Regards,
