Either my question is silly or there is no easy answer. On Saturday, September 10, 2016 at 3:57:33 PM UTC+3, Yaroslav Klymko wrote: > > Hi guys, > > I'm trying to figure out on how to trigger some logic at the moment TCP > connection established, and preferably *before traffic goes* > Initial code looks like this: > > > Tcp(system).outgoingConnection(???, ???).join(flow).runWith(source, sink) > > > > As far as I can see I need to access Future[OutgoingConnection] > > > val outgoingConnection: Flow[ByteString, ByteString, > Future[OutgoingConnection]] = Tcp(system).outgoingConnection(???, ???) > > > > So far I came to: > > > val (_, connected: Future[Tcp.OutgoingConnection], _) = > Source.fromGraph(source).viaMat(connection)(Keep.both).toMat(sink)(Keep.both).run() > > > > Question 1: how to guarantee my code performed before first ByteString > came? > Question 2: is there better solution > Question 3: how to prepend connection as first event in the flow of > ByteStrings ? > >
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