gistfile1.scala

  get("/thing/:id", operation(getThingAuraById)) {   
    val id           = params("id")  
    val Some(limit)  = ParamValidator.asInteger(params.getOrElse("limit", "100"))
    val Some(offset) = ParamValidator.asInteger(params.getOrElse("offset", "0"))
    ParamValidator.asInteger(id) match { 
      case Some(id) => {
        new AsyncResult { val is =
          // this returns a Finagle Future - I want an implicit in scope here to do the
          // conversion
          auraClient.auraByThingId(id, limit = limit, offset = offset) map { aura =>
          	JsonParticleCollectionView(aura.toList, nextThingUrl(id, offset, limit))
          }
        }
      }
      case None => NotFound(ResponseError("Invalid id: %s".format(id)))      
    }
  }