Re: [akka-user] akka-http: Completing RequestContext with a Future ?

2015-03-11 Thread James Mulcahy 

Hi Roland,

Thanks for the response.  You were correct - adding this makes the example 
work.  As you say, the error message could definitely be improved here :)

Cheers,

—James

> On Mar 11, 2015, at 4:58 PM, Roland Kuhn  wrote:
> 
> Hi James,
> 
> I'm on my phone right now but I think you'll need an implicit execution 
> context in scope. That error message should definitely be improved if 
> possible.
> 
> Regards,
> 
> Roland 
> 
> Sent from my iPhone
> 
> On 11 Mar 2015, at 14:24, James Mulcahy  > wrote:
> 
>> 
>> Hello,
>> 
>> I’m struggling to understand how I can complete an akka-http RequestContext 
>> asynchronously, using a future.  Synchronously completion is 
>> straightforward, e.g…...
>> 
>> val bundleRoutes = {
>>   (pathPrefix("bundles") & get) {
>> path(Segment / "meta") {
>>   bundleId => complete {
>> HttpResponse(entity = "Success!")
>>   }
>> }
>>   }
>> }
>> 
>> But I can’t find what API call I need in order to return a 
>> Future[HttpResponse].  If I do the simplest change, returning a completed 
>> future inside complete()…..
>> 
>> val bundleRoutesAsync = {
>>   (pathPrefix("bundles") & get) {
>> path(Segment / "meta") {
>>   bundleId => complete {
>> Future.successful(HttpResponse(entity = "Success!"))
>>   }
>> }
>>   }
>> }
>> 
>> …then the build fails with a type error (not necessarily too surprising).
>> 
>> type mismatch;
>> [error]  found   : scala.concurrent.Future[akka.http.model.HttpResponse]
>> [error]  required: akka.http.marshalling.ToResponseMarshallable
>> [error]   Future.successful(HttpResponse(entity = "Success!"))
>> 
>> I cannot see in the docs[1] what API I should use to achieve this.  Googling 
>> suggests that historically, with spray, using side-effecting calls with 
>> onComplete/onFailure was the right approach — but that doesn’t seem to be 
>> the case anymore. One thought was to return a Future[RouteResult] myself, 
>> but the RouteResult docs suggest that I shouldn’t be doing this.
>> 
>> I wonder if I’m missing an implicit marshaller that’ll handle the 
>> Future[HttpResponse] responses.
>> 
>> Could someone point me in the right direction here, please?
>> 
>> —James
>> 
>> [1] 
>> http://doc.akka.io/api/akka-stream-and-http-experimental/1.0-M4/?_ga=1.53285288.1092433602.1423525300#akka.http.server.RequestContext
>>  
>> 
>> 
>> -- 
>> >> Read the docs: http://akka.io/docs/ 
>> >> 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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> 
> 
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>>  Check the FAQ: 
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Re: [akka-user] akka-http: Completing RequestContext with a Future ?

2015-03-11 Thread Roland Kuhn 
Hi James,

I'm on my phone right now but I think you'll need an implicit execution context 
in scope. That error message should definitely be improved if possible.

Regards,

Roland 

Sent from my iPhone

> On 11 Mar 2015, at 14:24, James Mulcahy  wrote:
> 
> 
> Hello,
> 
> I’m struggling to understand how I can complete an akka-http RequestContext 
> asynchronously, using a future.  Synchronously completion is straightforward, 
> e.g…...
> 
> val bundleRoutes = {
>   (pathPrefix("bundles") & get) {
> path(Segment / "meta") {
>   bundleId => complete {
> HttpResponse(entity = "Success!")
>   }
> }
>   }
> }
> 
> But I can’t find what API call I need in order to return a 
> Future[HttpResponse].  If I do the simplest change, returning a completed 
> future inside complete()…..
> 
> val bundleRoutesAsync = {
>   (pathPrefix("bundles") & get) {
> path(Segment / "meta") {
>   bundleId => complete {
> Future.successful(HttpResponse(entity = "Success!"))
>   }
> }
>   }
> }
> 
> …then the build fails with a type error (not necessarily too surprising).
> 
> type mismatch;
> [error]  found   : scala.concurrent.Future[akka.http.model.HttpResponse]
> [error]  required: akka.http.marshalling.ToResponseMarshallable
> [error]   Future.successful(HttpResponse(entity = "Success!"))
> 
> I cannot see in the docs[1] what API I should use to achieve this.  Googling 
> suggests that historically, with spray, using side-effecting calls with 
> onComplete/onFailure was the right approach — but that doesn’t seem to be the 
> case anymore. One thought was to return a Future[RouteResult] myself, but the 
> RouteResult docs suggest that I shouldn’t be doing this.
> 
> I wonder if I’m missing an implicit marshaller that’ll handle the 
> Future[HttpResponse] responses.
> 
> Could someone point me in the right direction here, please?
> 
> —James
> 
> [1] 
> http://doc.akka.io/api/akka-stream-and-http-experimental/1.0-M4/?_ga=1.53285288.1092433602.1423525300#akka.http.server.RequestContext
> -- 
> >> Read the docs: http://akka.io/docs/
> >> 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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-- 
>>  Read the docs: http://akka.io/docs/
>>  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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[akka-user] akka-http: Completing RequestContext with a Future ?

2015-03-11 Thread James Mulcahy 

Hello,

I’m struggling to understand how I can complete an akka-http RequestContext 
asynchronously, using a future.  Synchronously completion is straightforward, 
e.g…...

val bundleRoutes = {
  (pathPrefix("bundles") & get) {
path(Segment / "meta") {
  bundleId => complete {
HttpResponse(entity = "Success!")
  }
}
  }
}

But I can’t find what API call I need in order to return a 
Future[HttpResponse].  If I do the simplest change, returning a completed 
future inside complete()…..

val bundleRoutesAsync = {
  (pathPrefix("bundles") & get) {
path(Segment / "meta") {
  bundleId => complete {
Future.successful(HttpResponse(entity = "Success!"))
  }
}
  }
}

…then the build fails with a type error (not necessarily too surprising).

type mismatch;
[error]  found   : scala.concurrent.Future[akka.http.model.HttpResponse]
[error]  required: akka.http.marshalling.ToResponseMarshallable
[error]   Future.successful(HttpResponse(entity = "Success!"))

I cannot see in the docs[1] what API I should use to achieve this.  Googling 
suggests that historically, with spray, using side-effecting calls with 
onComplete/onFailure was the right approach — but that doesn’t seem to be the 
case anymore. One thought was to return a Future[RouteResult] myself, but the 
RouteResult docs suggest that I shouldn’t be doing this.

I wonder if I’m missing an implicit marshaller that’ll handle the 
Future[HttpResponse] responses.

Could someone point me in the right direction here, please?

—James

[1] 
http://doc.akka.io/api/akka-stream-and-http-experimental/1.0-M4/?_ga=1.53285288.1092433602.1423525300#akka.http.server.RequestContext

-- 
>>  Read the docs: http://akka.io/docs/
>>  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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[akka-user] akka-http: Completing RequestContext with a Future ?

2015-03-11 Thread James Mulcahy 
Hello,

I’m struggling to understand how I can complete an akka-http RequestContext 
asynchronously, using a future.  Synchronously completion is 
straightforward, e.g…...

val bundleRoutes = {
  (pathPrefix("bundles") & get) {
path(Segment / "meta") {
  bundleId => complete {
HttpResponse(entity = "Success!")
  }
}
  }
}

But I can’t find what API call I need in order to return a 
Future[HttpResponse].  If I do the simplest change, returning a completed 
future inside complete()…..

val bundleRoutesAsync = {
  (pathPrefix("bundles") & get) {
path(Segment / "meta") {
  bundleId => complete {
Future.successful(HttpResponse(entity = "Success!"))
  }
}
  }
}

…then the build fails with a type error (not necessarily too surprising).

type mismatch;
[error]  found   : scala.concurrent.Future[akka.http.model.HttpResponse]
[error]  required: akka.http.marshalling.ToResponseMarshallable
[error]   Future.successful(HttpResponse(entity = "Success!"))

I cannot see in the docs[1] what API I should use to achieve this. 
 Googling suggests that historically, with spray, using side-effecting 
calls with onComplete/onFailure was the right approach — but that doesn’t 
seem to be the case anymore. One thought was to return a 
Future[RouteResult] myself, but the RouteResult docs suggest that I 
shouldn’t be doing this.

I wonder if I’m missing an implicit marshaller that’ll handle the 
Future[HttpResponse] responses.

Could someone point me in the right direction here, please?

—James

[1] 
http://doc.akka.io/api/akka-stream-and-http-experimental/1.0-M4/?_ga=1.53285288.1092433602.1423525300#akka.http.server.RequestContext

-- 
>>  Read the docs: http://akka.io/docs/
>>  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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