Hello Saloni,
I think it would be helpful to have a more realistic example than doing
"Thread.sleep(1000)" in the sink.
Could we unpack what this sleep is intended to mimic in your 'real'
application? Is it for example doing CPU-intensive data parsing or perhaps
some kind of IO?
Kind regards,
Arnout
On Thu, Jan 25, 2018 at 7:27 AM, <salo...@thoughtworks.com> wrote:
> Hello,
>
> We are having a requirement that if a consumer is slower than producer
> then discard all the elements that cannot be consumed and whenever the
> consumer gets ready, feed the latest element from producer.
>
> We tried an approach as follows:
>
> Source.actorRef(0, OverflowStrategy.dropHead) // actor receives data
>> at every 10 milliseconds
>
> .runWith {
>> println("data received")
>> Thread.sleep(1000) // mimic consumer processing data in
>> every 1 second
>> }
>
>
> We shrank the buffer size to 1 (minimal possible) with following settings
>
> private val actorMaterializerSettings = ActorMaterializerSettings(acto
>> rSystem).withInputBuffer(1, 1)
>
>
> With this buffer size, Sink pulls data 1 to consume and data 2 to put in
> buffer at initialization.
>
> While data 1 is getting processed we are dropping data from producer.
>
> When data 1 gets processed after 1000 milliseconds (1 second) ideally I
> should receive data 10 (and drop 2 - 9 as consumer is slow) but instead I
> receive data 2 from the buffer. data 2 in our domain is extremely useless
> as it is stale.
>
> Is there a way to disable buffer at Sink totally and always pull latest
> data from Source ?
>
>
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--
Arnout Engelen
*Senior Software Engineer*
E: arnout.enge...@lightbend.com
T: https://twitter.com/raboofje
--
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>>>>>>>>>> Check the FAQ:
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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