我正在尝试使用akka演员在播放frmework中使用websocket。在类Actors.FileObserverActor上找不到匹配的构造函数,用于参数
HomeController.scala
def socket = WebSocket.accept[String, String] { request =>
ActorFlow.actorRef(out => FileObserverActor.props(out))
}
演员/ FileUploaderActor.scala
class FileUploaderActor extends Actor{
override def receive: Receive = {
case UploadFile(billerId, filename, subCategory, count, dueDate) =>
val fileOberverActor = ActorSystem().actorOf(Props[FileObserverActor])
val billerData = BillerFileUploadMetaData(billerId,filename,count,"ACTIVE",
new java.sql.Timestamp(new java.util.Date().getTime),subCategory,dueDate)
val sparkSession = SparkContextHelper.sparkSession;
import sparkSession.implicits._
val rdd = sparkSession.sparkContext.parallelize(Seq(billerData))
val df = rdd.toDF()
df.write.format("org.apache.spark.sql.cassandra").options(Map("keyspace" -> "billerplatform_schema", "table" -> "biller_file_uploads")).mode(SaveMode.Append).save
fileOberverActor ! FileUploaded(filename, count)
}
}
演员/ FileObserverActor.scala
class FileObserverActor(out: ActorRef) extends Actor{
def receive = {
case FileUploaded(fileName, totalRecords) =>
out ! ("Got the file " + fileName)
}
}
object FileObserverActor{
def props(out: ActorRef) = Props(new FileObserverActor(out))
}
获取跟踪:
java.lang.IllegalArgumentException: no matching constructor found on class Actors.FileObserverActor for arguments []
at akka.util.Reflect$.error$1(Reflect.scala:81)
at akka.util.Reflect$.findConstructor(Reflect.scala:105)
at akka.actor.NoArgsReflectConstructor.<init>(IndirectActorProducer.scala:103)
at akka.actor.IndirectActorProducer$.apply(IndirectActorProducer.scala:60)
at akka.actor.Props.producer(Props.scala:131)
at akka.actor.Props.<init>(Props.scala:144)
at akka.actor.Props$.apply(Props.scala:86)
at Actors.FileUploaderActor$$anonfun$receive$1.applyOrElse(FileUploaderActor.scala:15)
at akka.actor.Actor$class.aroundReceive(Actor.scala:497)
at Actors.FileUploaderActor.aroundReceive(FileUploaderActor.scala:10)
这是在FileUploaderActor中创建一个actor实例的问题吗?你能帮我调试这个问题吗?
编辑: 我创建了一个同伴对象“FileObserverActor”,因为它需要建立控制器和FileObserverActor通过WebSocket的之间的连接,
def socket = WebSocket.accept[String, String] { request =>
ActorFlow.actorRef(out => FileObserverActor.props(out))
}
现在我也想将消息发送到“FileObserverActor”从“FileUploadActor”,但我无法从“FileUploadActor”创建一个实例,因为“FileObserverActor”参数化为“out:ActorRef”用于websocket连接。现在我怎么能从“FileUploadActor”发送消息到“FileObserverActor”?
我最好的猜测是你的FileObserverActor不是顶级类(stacktrace表示它是Actors.FileObserverActor)。你有没有试过把它变成公共课? –
@DiegoMartinoia对不起,延迟回复。 “Actors”中的同一包中的“FileObserverActor”和“FileUploaderActor”。所以这不应该成为一个问题吗? – Akan
对不起,我将Java和Scala混合在一起(最近在同时玩两个游戏)并混合了构造函数的可见性规则。无视评论, –