Somehow Google points to the M2 release which only has FlowGraph {implicit b
=>} which of course doesn’t work.
The 1.0 documentation is really good (if you find it..)
Especially:
http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0/scala/stream-composition.html
<http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0/scala/stream-composition.html>
Also there is an example without a merge:
http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0/scala/stream-graphs.html#Constructing_Flow_Graphs
<http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0/scala/stream-graphs.html#Constructing_Flow_Graphs>
The sharedDoubler Example however whats missing on some examples is that you
need to call run() or you make a via(FlowGraph) call, thats what I did:
val s1 = Sink.publisher[Article]
val s2 = Sink.publisher[Article]
val g = FlowGraph.closed(s1, s2)((_, _)) { implicit builder =>
(s1, s2) =>
import FlowGraph.Implicits._
val bcast = builder.add(Broadcast[Article](2))
Source(a.data) ~> bcast.in
bcast.out(0) ~> s1.inlet
bcast.out(1) ~> s2.inlet
}
val (pub1, pub2) = g.run()
After that I attach the Publisher, to two sources, one pulls data and puts it
into elastic search the other just puts it into it, what i still missing is to
generalize that.
I mean generalize the Article which is easy, just make a generic, however the
number of the outgoing publishers isn’t easily done. (or do I miss something)?
I mean something like:
def flow[T](pub: Publisher[T], out: Int) = {
FlowGraph.closed() { implicit builder =>
import FlowGraph.Implicits._
val bcast = builder.add(Broadcast[T](out))
Source(pub) ~> bcast
}
}
(pseudocode)
> Am 22.08.2015 um 14:35 schrieb Konrad Malawski <[email protected]>:
>
> What do you mean by "the wrong documentation"?
> We'd like to improve the docs (maybe add links etc), so it would help if you
> could explain what was confusing for you here.
>
> You don't need a Merge, just don't put one in your graph.
> You can use this example as basis for your code:
> http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0/scala/stream-graphs.html#Constructing_Flow_Graphs
>
> <http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0/scala/stream-graphs.html#Constructing_Flow_Graphs>
> and just remote the Merge from there :-)
>
>
> --
> Cheers,
> Konrad Malawski
> Akka @ Typesafe
>
> On 22 August 2015 at 13:03:07, Christian Schmitt ([email protected]
> <mailto:[email protected]>) wrote:
>
>> Thanks somehow I always visited the wrong documentation...
>>
>> Am Samstag, 22. August 2015 12:56:27 UTC+2 schrieb Konrad Malawski:
>> What you're looking for is a Broadcast operation.
>> Here's docs about how to use it:
>> http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0/scala/stream-graphs.html
>>
>> <http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0/scala/stream-graphs.html>
>>
>>
>> <http://doc.akka.io/docs/akka-stream-and-http-experimental/1.0/scala/stream-graphs.html>
>> --
>> Cheers,
>> Konrad Malawski
>> Akka @ Typesafe
>>
>> On 22 August 2015 at 12:16:58, Christian Schmitt ([email protected] <>)
>> wrote:
>>
>>> Hello, currently I have an actor which gets a Publisher,
>>> this publisher has either one or multiple elements.
>>>
>>> Based on that I want to run through this data and send the values to
>>> multiple Subscribers (fan-out)
>>> One should process it and get additional data from a database (which
>>> returns a future)
>>> Another should do the same but without the additional data
>>>
>>> both will index the data to elasticsearch Currently I tried to have a
>>> Sink.fanoutPublisher, however it will still only run once either with
>>> getting data from the database or without demo code:
>>>
>>> val pub = Source(a.data).runWith(Sink.fanoutPublisher(4, 4))
>>> Source(pub).runForeach{ _ => log.debug("1")}
>>> Source(pub).runForeach{ _ => log.debug("2")}
>>>
>>>
>>>
>>> Currently a.data is a publisher which holds a case class, however my output
>>> will always be:
>>>
>>> [debug] w.IndexWorker - 1
>>>
>>>
>>>
>>> Is there a way to attach multiple sources? or better just splitting the
>>> first source and send it to multiple?
>>> --
>>> >>>>>>>>>> Read the docs: http://akka.io/docs/ <http://akka.io/docs/>
>>> >>>>>>>>>> Check the FAQ:
>>> >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>> >>>>>>>>>> <http://doc.akka.io/docs/akka/current/additional/faq.html>
>>> >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user
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>> >>>>>>>>>> Read the docs: http://akka.io/docs/ <http://akka.io/docs/>
>> >>>>>>>>>> Check the FAQ:
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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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