Hi Victor,
Embedding is not the way to think about this. What you really want is a
BidiStage which then can be composed by any Flow to get a new Flow.
-Endre
On Thu, Sep 1, 2016 at 10:12 AM, Victor <victor.pi...@iadvize.com> wrote:
> Hi,
>
> Is it possible to embed a Flow in a GraphStage?
>
> I want to design a GraphStage which monitor a flow given by a user (pseudo
> code):
>
> class MyFlow(embededFlow: Flow[MyMessage, MyMessage, NotUsed]) extends
> GraphStage[FlowShape[MyContent, MyContent]] {
>
> var id
>
> onPush = {
> val msg = grab(in)
> id = msg.id
> push(embededFlow.in, msg.content)
> }
>
> onPull = {
> val content = grab(embededFlow.out)
> push(out, MyMessage(id, content))
> }
>
> embededFlow.onFailure = {
> push(out, ...)
> }
>
> }
>
>
> The embeded flow is a black box and I want to monitor it, react to it's
> failure and manage a state because I don't want to expose the whole message
> to the embeded flow, I just want it to process a part of the message.
>
> Is it possible?
>
> Thanks in advance,
> Victor
>
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