我正在尝试编写一个连接到Amazon Kinesis流的Actor,然后将通过Comet接收的任何消息中继到Web UI。我正在使用Source.actorPublisher,并使用Comet in Play中的json方法描述Official Docs。我使用Source.tick()使事件正常工作,但是当我尝试使用ActorPublisher时,似乎似乎没有按预期发送任何Request
个消息。如何通过Akka流程发送数据请求?我正在使用Play Framework的v2.5。
我的控制器代码:
def subDeviceSeen(id: Id): Action[AnyContent] = Action {
val deviceSeenSource: Source[DeviceSeenMessage, ActorRef] = Source.actorPublisher(DeviceSeenEventActor.props)
Ok.chunked(deviceSeenSource
.filter(m => m.id == id)
.map(Json.toJson(_))
via Comet.json("parent.deviceSeen")).as(ContentTypes.JSON)
}
我在上面做了什么明显错误的事吗?这是我的演员代码:
object DeviceSeenEventActor {
def props: Props = Props[DeviceSeenEventActor]
}
class DeviceSeenEventActor extends ActorPublisher[DeviceSeenMessage] {
implicit val mat = ActorMaterializer()(context)
val log = Logging(context.system, this)
def receive: Receive = {
case Request => log.debug("Received request message")
initKinesis()
context.become(run)
case Cancel => context.stop(self)
}
def run: Receive = {
case vsm:DeviceSeenMessage => onNext(vsm)
log.debug("Received request message")
onCompleteThenStop() //we are currently only interested in one message
case _:Any => log.warning("Unknown message received by event Actor")
}
private def initKinesis() = {
//init kinesis, a worker is created and given a reference to this Actor.
//The reference is used to send messages to the actor.
}
}
永远不会显示“已接收的请求消息”日志行。我错过了一些隐含的吗?播放控制台中没有显示任何警告或任何其他明显的信息。
答案 0 :(得分:0)
问题是我在case Request => ...
而不是case Request() => ...
上进行了模式匹配。由于我的receive()
方法中没有默认大小写,因此该消息只是由Actor删除。