Question

我正在尝试将Akka未来与play框架连接到远程akka系统。在运行系统之后，akka的未来会给我一个警告，即剩下一个参数。

代码如下：

这是[lay lay code： P

ackage controllers;

import com.typesafe.config.ConfigFactory;

import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.actor.Props;
import play.*;
import play.mvc.*;

import views.html.*;

public class Application extends Controller {



  public static Result index() throws InterruptedException { 

      System.out.println(" Local Node Called0");


      ActorSystem csystem = ActorSystem.create("Application", ConfigFactory.load().getConfig("LocalNode"));
      ActorRef localNode = csystem.actorOf(new Props(LocalNode.class));

        System.out.println(" Local Node Called1");
        localNode.tell("Hello");
        System.out.println(" Local Node Called2");

        Thread.sleep(5000);
        csystem.shutdown();
        return ok(index.render("I am OK"));
  }           
}

这是play框架本地actor节点

包控制器;

import akka.actor。; import akka.dispatch.Await; import akka.dispatch.Future; import akka.event.Logging; import akka.event.LoggingAdapter; import akka.util.Duration; import akka.util.Timeout; import akka.pattern。;

公共类LocalNode扩展UntypedActor {

    LoggingAdapter log = Logging.getLogger(getContext().system(), this);
    Timeout timeout = new Timeout(Duration.parse("20 seconds"));

    ActorRef masterActor;

    public void preStart()
    {
        /* Get reference to Master Node*/
         masterActor = 

    getContext().actorFor("akka://MasterNode@127.0.0.1:2552/user/masterActor");
    }

    @Override
    public void onReceive(Object message) throws Exception {
        System.out.println(" Future called  ");

         Future<Object> future = Patterns.ask(masterActor , message.toString(), timeout);

            String result = (String) Await.result(future, timeout.duration());

            log.info("Messagefrom Server", result.toString());  
    }
   }

这是远程akka系统主人nide

package Rubine_Cluster;

import com.typesafe.config.ConfigFactory;

import akka.actor.ActorRef;
import akka.actor.ActorSystem;
import akka.actor.Props;
import akka.actor.UntypedActor;
import akka.kernel.Bootable;

/**
 * Hello world!
 *
 */
public class MasterNode implements Bootable
{
     final ActorSystem system;

      public MasterNode() {
        system = ActorSystem.create("MasterNode", ConfigFactory.load()
            .getConfig("masterNode"));
        ActorRef masterActor = system.actorOf(new Props(MasterActor.class),"masterActor");
        System.out.println(" Master Node is called ");
      }

      public void startup() {

      }

          public void shutdown() {
            system.shutdown();
          }
}

这是akka远程系统MasterActor

package Rubine_Cluster;

import akka.actor.*;


public class MasterActor extends UntypedActor {

    @Override
    public void onReceive(Object message) throws Exception {


         if (message instanceof String) {
                // Get reference to the message sender and reply back
                getSender().tell(message + " got something");       
    }
  }  
}

这是来自play framewrok的消息

[INFO] [09/30/2012 16:47:25.669] [Application-akka.actor.default-dispatcher-1] [
akka://Application/user/$a] Messagefrom Server WARNING arguments left: 1

需要帮助，因为我想要达到作业截止日期

感谢所有

Answer 1

“参数左：1”警告是由以下行引起的：

log.info("Messagefrom Server", result.toString())

您将未使用的参数传递给记录器。它应该是这样的：

log.info("Messagefrom Server {}", result.toString())

Answer 2

尝试在Play中为你的演员命名：

ActorRef localNode = csystem.actorOf(new Props(LocalNode.class), "localNode");

另请注意，如果您需要从Play访问Akka系统，最好使用：

ActorSystem csystem = Akka.system();

而不是：

ActorSystem csystem = ActorSystem.create("Application", ConfigFactory.load().getConfig("LocalNode"));

使用Play Framework的Akka未来

2 个答案: