Lift3, futures and resthelper

[Colin Bester]

I realize I need to sit down, read and catch up on new features of Lift 3 but am battling due to amount of information covering range of versions.

1. There has been tremendous work done in bringing out Lift 3 and I can understand documentation being behind (and have no problem with that) but any suggestions on where to find most up to date documentation, especially on new features?
   
2. I have a future streaming response function that I use to serve an image via RestHelper and am wanting to know if there are any gotchas I am missing in implementing as below.
   
3. I normally try avoid using global execution context but don't really see a way around this at present (going to kick myself later I am sure) - any recommendations?
   

object DocumentServer extends RestHelper {

 import scala.concurrent.ExecutionContext.Implicits.global

  def init() { ..}

 def getQRCodeFuture(deviceId: String, format:String = "jpg", size:Int = 150)(implicit ec: ExecutionContext): Future[StreamingResponse] = {}

 serve {

  case "api" :: "qrcode" :: deviceId :: Nil Get _ => {

    val size = for {

      width <- S.param("size")        

    } yield {

      try {

        width.toInt

      } catch {

        case x:java.lang.NumberFormatException => 150

      }

    }

    getQRCodeFuture(deviceId, "jpg", size.getOrElse(150))

 }

}

[Antonio Salazar Cardozo]

I believe you should be good on that example---let us know if you're seeing issues. There

may be some possible strange interactions between futures and streaming responses, but

I don't think so off the top of my head. No real thoughts on the global execution context---if

it works, it works :)

As for getting caught up on Lift 3, I tried to compile as many changes or links to additional

compendia of changes in the original announcement @ https://github.com/lift/framework/releases/tag/3.0-release .

There is also a handful of changes that went into 3.1.0: https://github.com/lift/framework/releases/tag/3.1.0-release .

In general, we'll been trying to keep release notes comprehensive and linked to their relevant

PRs moving forward.

Thanks,

Antonio

[Colin Bester]

Thanks, much appreciated.

[Matt Farmer]

I'm actually doing some of this in my REST API for the judicial-manager project I'm working on in my spare time. If you run into any issues, it may be a helpful reference! :)

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[Colin Bester]

Thanks for sharing Matt!