I'm aware of the caveats about sender and closing over mutable state, but
in this case the list was a plain list, not a Future. But thanks for
showing an alternative.
On Mon, Sep 22, 2014 at 7:30 AM, Björn Antonsson <
bjorn.antons...@typesafe.com> wrote:
> Hi Richard,
>
> When dealing with futures, inside actors you should generally be careful
> with using sender, since the code that is executed when the future is
> completed isn't run inside the actor and the meaning of sender might have
> changed. In this case, the pipeTo pattern will keep you safe, but it's easy
> to mess up.
>
>
> If you don't plan to use the intermediate I would collapse the map and
> foreach into a single foreach.
>
>
> val recipient = sender
> requests.foreach { responseFuture => {
> responseFuture.map(response => s"success $response").recover({ case _ =>
> "failed"}) pipeTo recipient
> }}
>
> B/
>
> On 19 September 2014 at 20:46:50, Richard Rodseth (rrods...@gmail.com)
> wrote:
>
> I'm still getting used to all the flavours of future composition. Fun
> stuff. Is there a better way than the following to pipe a list of futures
> to the sender (one message per future) ?
>
> val requests:List[Future[SomeResponse]] = ...
>
> val messages:List[Future[String]] = requests.map { responseFuture => {
>
> val msgFuture:Future[String] = responseFuture.map(response => s"success
> $response").recover { case _ => "failed"}
>
> msgFuture
>
> }}
>
> messages.foreach { msg =>
>
> msg pipeTo sender
>
> }
> --
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> --
> Björn Antonsson
> Typesafe <http://typesafe.com/> – Reactive Apps on the JVM
> twitter: @bantonsson <http://twitter.com/#!/bantonsson>
>
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>>>>>>>>>> Check the FAQ:
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