Hi Leon,
No, once you broadcast to two streams, they are concurrent and therefore
have no ordering between them. Concurrent processing is the reason to use
streams. If you have ordering requirements, then maybe you don't want
concurrent processing for that step at all?
I.e. why not just do
src.mapConcat {
if (..) do someStuff
else do otherStuff
}
The question that you need to ask yourself is exactly the same as with
actors: "do I need a separate actor for this (to exploit parallelism, or
for isolation) or I can execute this as part of this actor?"
-Endre
On Wed, Nov 25, 2015 at 10:24 AM, Leon Ma <[email protected]> wrote:
> Hi,
>
> I have below stream:
>
>
> broadcast ~> filter1 ~> flowA ~> flowB ~> merge
> broadcast ~> filter2 ~> flowC ~> merge
>
> Assuming filter1 and filter2 are exclusive, which means my input element
> will either go upper flow or go down flow.
>
> How can I guarantee the order?
>
> Say I have a source of X, Y, Z,
>
> X goes upper flow, Y and Z goes down flow, if flowC runs much faster than
> flowA + flowB, am I expect to see orders like Y', Z', X' ?
>
>
> Thanks
> Leon
>
>
>
>
>
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