Hi,

the original flow was a flow from HttpRequest to HttpResponse. However the
flow from cachedHostConnectionPool is

Flow[(HttpRequest, T), (Try[HttpResponse], T), ...]

 Here a flow accepts requests with a marker object from that request. And
responses are wrapped in a try and come back together with the original
marker object. Marker objects are provided to correlate responses to
requests. When using connection pool responses for later requests can come
before responses for earlier requests.

Take a look at the documentation and code examples which should help you
get up to speed with the api:

https://doc.akka.io/docs/akka-http/10.0.10/scala/http/client-side/host-level.html#using-a-host-connection-pool

On Tue, Nov 21, 2017 at 10:10 AM Jozsef Zsido <[email protected]> wrote:

> Hi,
>
> I'm trying to expand the following example and replace the flow with
> cachedHostConnectionPool
> https://gist.github.com/rklaehn/3aa3215046df2c0a7795
>
> My problem is that I'm unable to write compilable code:
>
> val flow = Http(system).cachedHostConnectionPool[HttpResponse]("localhost", 
> 56700)
>
> Source.single(context.request)
>   .map {
>     _.withHeaders(HttpUtils.completeHeaderList(request))
>       .withUri(request.uri.path.toString())
>   }
>   .map(r => {
>     println(r)
>     r
>   })
>   .via(flow)
>   .runWith(Sink.head)
>   .flatMap(f => {
>     context.complete(f)
>   })
>
>
> What I'm doing wrong?
>
> Thanks,
> Jozsef
>
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