You'll have to use the OutputStream outside of the materialiation, i.e. use
what is returned by .run()

On Fri, Jun 24, 2016 at 11:48 PM, Dragisa Krsmanovic <[email protected]>
wrote:

> I was trying to use StreamConverters.asOutputStream to create a Source
> from a legacy system (Apache POI) that can write to Java OutputStream.
>
> I had something like this, but it didn't work
>
>  val source = StreamConverters.asOutputStream().mapMaterializedValue(os =>
> report.write(os)
>
> What works is using StramConverters.fromInputStream()
>
>    val inputStream = new PipedInputStream()
>    val outputStream = new PipedOutputStream(ios)
>    Future{ /** Write to outputStream */ }
>    val source = StreamConverters.fromInputStream(() => inputStream))
>
>
> But here, I have this ugly part where I have to manually create a future.
> This came in context of Play chunked response.
> You can read the whole thread in
> https://groups.google.com/forum/#!topic/play-framework/POQ3EuFLmmo
>
> I am wondering, what is the "proper" use of
> StramConverters.asOutpitStream() ?
>
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-- 
Cheers,
√

-- 
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>>>>>>>>>>      Check the FAQ: 
>>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html
>>>>>>>>>>      Search the archives: https://groups.google.com/group/akka-user
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