Leon-
There's a couple of ways to solve this, but one simple solution is to use a
combination of Broadcast, filter, and Merge.
1. Broadcast the elements to two branches and filter each branch. Assuming the
respective filters are mutually exclusive, each element will only go down a
single branch.
2. Place the FlowB on the desired branch to receive extra processing.
3. Place the Merge prior to FlowC to join the two branches
The result will look something like this:
FlowA ~> bcast ~> nonfilter ~> FlowB ~> merge
~> filter ~> merge
~> merge.out ~>
FlowC
However, an even simpler solution, depending on your requirements, is to just
implement FlowB as a map stage that passes through on false match. Something
like:
val flowB = Flow[T].map(e => cond(e) match {
case true => // do something
case false => e
}
You can then just chain via() calls (flowA.via(flowB).via(flowC)). A wee bit
simpler if it fits your case.
Lance
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