如何在 Play 控制器中注入带有构造函数参数的 Actor？

Question

我正在尝试关注JavaWebSocket Tutorial on the official docs。

有这个演员：

import akka.actor.*;

public class MyWebSocketActor extends UntypedActor {

    public static Props props(ActorRef out) {
        return Props.create(MyWebSocketActor.class, out);
    }

    private final ActorRef out;

    public MyWebSocketActor(ActorRef out) {
        this.out = out;
    }

    public void onReceive(Object message) throws Exception {
        if (message instanceof String) {
            out.tell("I received your message: " + message, self());
        }
    }
}

这是网络套接字：

public static LegacyWebSocket<String> socket() {
    return WebSocket.withActor(MyWebSocketActor::props);
}

这是我的控制器：

@Singleton
public class MessagesController extends BaseController implements CurrentUser {

    private UserProvider userProvider;
    private ActorSystem actorSystem;
    private Materializer materializer;
    private Configuration configuration;
    ActorRef websocketactor;


    @Inject
    public MessagesController(final UserProvider userProvider,
                              ActorSystem actorSystem,
                              Materializer materializer,
                              Configuration configuration

    ) {
        this.userProvider = userProvider;
        this.actorSystem = actorSystem;
        this.materializer = materializer;
        this.configuration = configuration;
        this.websocketactor = actorSystem.actorOf(); // What goes in here ? 

    }

在初始化过程之后，我想从控制器方法向actor发送消息。

 this.websocketactor = actorSystem.actorOf(MyWebSocketActor.props()); // this line is giving me errors because I don't know what goes in there. 

可能是 ActorRef out，这是我的 websocket，但我该如何指定呢？

Answer 1

我刚刚在另一篇文章中回答了同样的问题，但以防万一：

您可以为此使用 lambda，这是一个简单的示例：

  public LegacyWebSocket<String> socket(String token) {
        return WebSocket.withActor(actorRef -> WSActor.props(actorRef,token));
  }