Hi Jakub,
(Please remove the formatting from IntelliJ next time, it is hard to read
in Gmail)
On Thu, May 28, 2015 at 12:18 PM, Jakub Liska <liska.ja...@gmail.com> wrote:
> Hi,
>
> I cannot figure out, how would I do something like :
>
> bucketOpt match {
> case None =>
> *// ??? How to return just a dummy partial graph ???*
> case Some(bucket) =>
> Flow() { implicit b =>
> import FlowGraph.Implicits._
>
> val broadcast = b.add(Broadcast[Array[ResCtx]](2))
>
> val uniqueResourceFilter = Flow[Array[ResCtx]].transform(() => new
> UniqueResourceFilter)
> val backup = Flow[Iterable[Resource]].mapAsyncUnordered(4) { resources
> =>
> Future.sequence(
> resources.map( res => S3BackupFlow.backup(bucket, res, res.name,
> deleteLocal))
> )
> }
> broadcast.out(0) ~> uniqueResourceFilter ~> backup ~> Sink.ignore
>
> (broadcast.in, broadcast.out(1))
> }
> }
>
>
>
Since you return just a Flow, why don't you just create an empty Flow? I.e
Flow[Array[ResCtx]]
> Also it is a mystery to me how to grab just an inlet stream, for doing
> something like :
>
> Flow() { implicit b =>
> import FlowGraph.Implicits._
>
>
>
> val uniqueResourceFilter = Flow[Array[ResCtx]].transform(() => new
> UniqueResourceFilter)
>
> val merge = b.add(Merge[Array[ResCtx]](2))
>
>
>
> ???in??? ~> filter ~> broadcast.out(0) ~> uniqueResourceFilter ~> backup ~>
> merge.in(0)
>
> ~> broadcast.out(1) ~> uniqueResourceFilter ~> backup ~>
> merge.in(1)
>
>
> (???in???, merge.out)
> }
>
>
>
You can always do:
val f = b.add(filter)
f.out ~> broadcast ...
(f.in, merge.out)
Flows/Sources/Sinks have this little feature that you don't need to import
them explicitly like I did above, but that does not mean you can't import
them explicitly.
-Endre
>
> Thanks, Jakub
>
> --
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--
>>>>>>>>>> Read the docs: http://akka.io/docs/
>>>>>>>>>> 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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