It was unclear what the semantics were for ValueState for merging windows. (It's also a bit weird as it's inherently a race condition wrt element ordering, unlike Bag and CombineState, though you can always implement it as a CombineState that always returns the latest value which is a bit more explicit about the dangers here.)
On Wed, Apr 24, 2019 at 10:08 PM Brian Hulette <bhule...@google.com> wrote: > > That's a great idea! I thought about this too after those posts came up on > the list recently. I started to look into it, but I noticed that there's > actually no implementation of ValueState in userstate. Is there a reason for > that? I started to work on a patch to add it but I was just curious if there > was some reason it was omitted that I should be aware of. > > We could certainly replicate the example without ValueState by using BagState > and clearing it before each write, but it would be nice if we could draw a > direct parallel. > > Brian > > On Fri, Apr 12, 2019 at 7:05 AM Maximilian Michels <m...@apache.org> wrote: >> >> > It would probably be pretty easy to add the corresponding code snippets to >> > the docs as well. >> >> It's probably a bit more work because there is no section dedicated to >> state/timer yet in the documentation. Tracked here: >> https://jira.apache.org/jira/browse/BEAM-2472 >> >> > I've been going over this topic a bit. I'll add the snippets next week, if >> > that's fine by y'all. >> >> That would be great. The blog posts are a great way to get started with >> state/timers. >> >> Thanks, >> Max >> >> On 11.04.19 20:21, Pablo Estrada wrote: >> > I've been going over this topic a bit. I'll add the snippets next week, >> > if that's fine by y'all. >> > Best >> > -P. >> > >> > On Thu, Apr 11, 2019 at 5:27 AM Robert Bradshaw <rober...@google.com >> > <mailto:rober...@google.com>> wrote: >> > >> > That's a great idea! It would probably be pretty easy to add the >> > corresponding code snippets to the docs as well. >> > >> > On Thu, Apr 11, 2019 at 2:00 PM Maximilian Michels <m...@apache.org >> > <mailto:m...@apache.org>> wrote: >> > > >> > > Hi everyone, >> > > >> > > The Python SDK still lacks documentation on state and timers. >> > > >> > > As a first step, what do you think about updating these two blog >> > posts >> > > with the corresponding Python code? >> > > >> > > https://beam.apache.org/blog/2017/02/13/stateful-processing.html >> > > https://beam.apache.org/blog/2017/08/28/timely-processing.html >> > > >> > > Thanks, >> > > Max >> >
