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Test de séparation d'un Enumerator (de Play 2) en 2 parties.
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package tests | |
import play.api._ | |
import play.api.libs.concurrent._ | |
import play.api.libs.iteratee._ | |
import scala.concurrent._ | |
import scala.concurrent.ExecutionContext.global | |
object TestEnum { | |
def basic { | |
val enum = Enumerator.enumerate(1 to 100) | |
val eitherEnum = enum &> Enumeratee.map { | |
case i if i % 2 == 0 => Right(i) | |
case i => Left(i) | |
} | |
val ko = eitherEnum &> Enumeratee.collect { case Left(x) => x } | |
val ok = eitherEnum &> Enumeratee.collect { case Right(x) => x } | |
ok |>> Iteratee.foreach(x => println(s"ok: $x")) | |
ko |>> Iteratee.foreach(x => println(s"ko: $x")) | |
} | |
def broadcast { | |
val enum = Enumerator.enumerate(1 to 100) | |
val eitherEnum = enum &> Enumeratee.map { | |
case i if i % 2 == 0 => Right(i) | |
case i => Left(i) | |
} | |
val (broadcast, _) = Concurrent.broadcast(eitherEnum) | |
val ko = broadcast &> Enumeratee.collect { case Left(x) => x } | |
val ok = broadcast &> Enumeratee.collect { case Right(x) => x } | |
ok |>> Iteratee.foreach(x => println(s"ok: $x")) | |
ko |>> Iteratee.foreach(x => println(s"ko: $x")) | |
} | |
} |
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Nouvelle version utilisant
broadcast
: les nombres sont maintenant affichés dans l'ordre… mais commencent à partir de 2. Est-ce que ça veut dire que broadcast consomme l'enumerator même si personne ne lit ?