Hi,

Yes, but it seems that I need to create Java API for it, because my app is 
in Java. 
I used Inkscape app. to draw the diagram.

Cheers,
Sergey

среда, 19 октября 2016 г., 0:46:00 UTC+3 пользователь Rafał Krzewski 
написал:
>
> A custom GraphStage [1] using AmorphousShape is probably the way to go in 
> this case.
>
> That's a really neat diagram, BTW! What software did you us to create it?
>
> Cheers,
> Rafał
>
> [1] 
> http://doc.akka.io/docs/akka/2.4/scala/stream/stream-customize.html#Custom_processing_with_GraphStage
>
> W dniu wtorek, 18 października 2016 22:12:07 UTC+2 użytkownik Sergey Sopin 
> napisał:
>>
>> Hi again,
>>
>> I have a very specific case. My flow looks like this one:
>>
>>
>> <https://lh3.googleusercontent.com/-qrP4yHkVYI8/WAaAO1-q67I/AAAAAAAAAbw/acUT-YaG48k0lo7MkePGv9QVVRkH5L_BACLcB/s1600/Flow.png>
>>
>> The idea of multi input/output shape was to redirect messages to a right 
>> output based on the message data.
>>
>> I just learn streams, so maybe you can suggest a better solution?
>>
>> Thanks!
>>
>>
>> Cheers, 
>>
>> Sergey
>>
>>
>>
>> вторник, 18 октября 2016 г., 18:34:22 UTC+3 пользователь Rafał Krzewski 
>> написал:
>>>
>>> It's not clear to me, what are you trying to accomplish. It looks like 
>>> you are trying to implement AmorphousShape (ie. arbitrary number of open 
>>> inlets and outlets) on your own, and then a specific variant of it, that 
>>> has all inlets sharing the same type, and all outlets sharing another type. 
>>> The "Fan" fragment in the names you used is a bit misleading, since in Akka 
>>> Stream's own usage of it names like FanIn / FanOut shape mean that such 
>>> grap has many inlets and single outlet / single inlet many outlets. The 
>>> analogy is to a Chinese-style hand held fan, rather than ceiling fan with 
>>> many blades :) I am wondering what use case you have in mind for your 
>>> AmorphousShape because the graphs that can be materialized and executed 
>>> must ultimately have a ClosedShape. You could use such multi-outlet graphs 
>>> for reusing pieces of functionality, but anything more complex than a 
>>> BidiShape  seems  rather unwieldy to me.
>>>
>>> My understanding is that Graph's shape should not interfere with message 
>>> flow, because it's just a canvas with contact points on the perimeter. What 
>>> matters are the components that you plug into it. Akka just makes sure that 
>>> you don't leave any of the contact points dangling. This makes me think 
>>> that the problems with messages getting "stuck" was caused somewhere other 
>>> than graph shape construction site.
>>>
>>> Have you tried inserting probes alon the lines of 
>>> Flow.alsoTo(Sink.foreach(_ 
>>> => println("beep!"))) (shooting from the hip here, apologies if it does 
>>> not compile straight away) into your graph? That could help you locate 
>>> where the messages are stuck / discarded.
>>>
>>> Cheers,
>>> Rafał
>>>
>>> W dniu poniedziałek, 17 października 2016 20:22:43 UTC+2 użytkownik 
>>> Sergey Sopin napisał:
>>>>
>>>> Hi,
>>>>
>>>> I am trying to create my own akka streams shape with several Inlets and 
>>>> Outlets. I have written following code: 
>>>>
>>>> package kernel.modeller.workers.streamFinder.generic
>>>>
>>>> import akka.stream.{Shape, Outlet, Inlet}
>>>> import scala.annotation.unchecked.uncheckedVariance
>>>> import scala.collection.immutable
>>>>
>>>> object FanShape {
>>>>   sealed trait Init[_] {
>>>>     def inlets: immutable.Seq[Inlet[_]]
>>>>     def outlets: immutable.Seq[Outlet[_]]
>>>>     def name: String
>>>>   }
>>>>   final case class Name[_](override val name: String) extends Init[Any] {
>>>>     override def inlets: immutable.Seq[Inlet[_]] = Nil
>>>>     override def outlets: immutable.Seq[Outlet[_]] = Nil
>>>>   }
>>>>   final case class Ports[_](override val inlets: immutable.Seq[Inlet[_]], 
>>>> override val outlets: immutable.Seq[Outlet[_]]) extends Init[Any] {
>>>>     override def name: String = "FanShape"
>>>>   }
>>>> }
>>>>
>>>> abstract class FanShape[_] private (_in: Iterator[Inlet[_]], _out: 
>>>> Iterator[Outlet[_]], _name: String) extends Shape {
>>>>   
>>>>   import FanShape._
>>>>
>>>>   def this(init: FanShape.Init[_]) = this(init.inlets.iterator, 
>>>> init.outlets.iterator, init.name)
>>>>
>>>>   final override def outlets: immutable.Seq[Outlet[_]] = _outlets
>>>>   final override def inlets: immutable.Seq[Inlet[_]] = _inlets
>>>>
>>>>   private var _outlets: Vector[Outlet[_]] = Vector.empty
>>>>   private var _inlets: Vector[Inlet[_]] = Vector.empty
>>>>
>>>>   protected def newOutlet[T](name: String): Outlet[T] = {
>>>>     val p = if (_out.hasNext) _out.next().asInstanceOf[Outlet[T]] else 
>>>> Outlet[T](s"${_name}.$name")
>>>>     _outlets :+= p
>>>>     p
>>>>   }
>>>>
>>>>   protected def newInlet[T](name: String): Inlet[T] = {
>>>>     val p = if (_in.hasNext) _in.next().asInstanceOf[Inlet[T]] else 
>>>> Inlet[T](s"${_name}.$name")
>>>>     _inlets :+= p
>>>>     p
>>>>   }
>>>>
>>>>   protected def construct(init: Init[_]): FanShape[_]
>>>>
>>>>   def deepCopy(): FanShape[_] = 
>>>> construct(Ports(inlets.map(_.carbonCopy()), outlets.map(_.carbonCopy())))
>>>>   final def copyFromPorts(inlets: immutable.Seq[Inlet[_]], outlets: 
>>>> immutable.Seq[Outlet[_]]): FanShape[_] = {
>>>>     require(outlets.size == _outlets.size, s"proposed outlets 
>>>> [${outlets.mkString(", ")}] do not fit FanShape")
>>>>     require(inlets.size == _inlets.size, s"proposed inlects 
>>>> [${inlets.mkString(", ")}] do not fit FanShape")
>>>>     construct(Ports(inlets, outlets))
>>>>   }
>>>> }
>>>>
>>>> object UniformFanShape {
>>>>   def apply[I, O](inlets: Array[Inlet[I]], outlets: Outlet[O]*): 
>>>> UniformFanShape[I, O] =
>>>>     new UniformFanShape(inlets.size, outlets.size, 
>>>> FanShape.Ports(inlets.toList, outlets.toList))
>>>> }
>>>>
>>>> class UniformFanShape[-I, +O](n: Int, m: Int, _init: FanShape.Init[_]) 
>>>> extends FanShape(_init) {
>>>>   def this(n: Int, m: Int) = this (n, m, FanShape.Name("UniformFan"))
>>>>   def this(n: Int, m: Int, name: String) = this(n, m, FanShape.Name(name))
>>>>   def this(inlets: Array[Inlet[I]], outlets: Array[Outlet[O]]) = 
>>>> this(inlets.size, outlets.size, FanShape.Ports(inlets.toList, 
>>>> outlets.toList))
>>>>   override protected def construct(init: FanShape.Init[_]): FanShape[_] = 
>>>> new UniformFanShape(n, m, init)
>>>>   override def deepCopy(): UniformFanShape[I, O] = 
>>>> super.deepCopy().asInstanceOf[UniformFanShape[I, O]]
>>>>
>>>>   val inArray: Array[Inlet[I @uncheckedVariance]] = Array.tabulate(n)(i ⇒ 
>>>> newInlet[I](s"in$i"))
>>>>   def in(n: Int): Inlet[I @uncheckedVariance] = inArray(n)
>>>>
>>>>   val outArray: Array[Outlet[O @uncheckedVariance]] = Array.tabulate(m)(j 
>>>> ⇒ newOutlet[O](s"out$j"))
>>>>   def out(m: Int): Outlet[O @uncheckedVariance] = outArray(m)
>>>> }
>>>>
>>>>
>>>> This code allows creating graph, however, it is not possible to process 
>>>> messages with it. It doesn't call handlers for messages, they get stuck 
>>>> somewhere. 
>>>> Could you please help me to fix it? 
>>>>
>>>> PS: I am not an expert in Scala.
>>>>
>>>> Thank you in advance!
>>>>
>>>> Regards,
>>>> Sergey
>>>>
>>>

-- 
>>>>>>>>>>      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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