akka学习教程(三) 不可变对象

悠悠 2022-07-13 10:23 193阅读 0赞

# akka系列文章目录 #

*  [akka学习教程(十四) akka分布式实战][akka_ akka]
 *  [akka学习教程(十三) akka分布式][akka_ akka 1]
 *  [akka学习教程(十二) Spring与Akka的集成][akka_ Spring_Akka]
 *  [akka学习教程(十一) akka持久化][akka_ akka 2]
 *  [akka学习教程(十) agent][akka_ agent]
 *  [akka学习教程(九) STM软件事务内存][akka_ STM]
 *  [akka学习教程(八) Actor中的Future-询问模式][akka_ Actor_Future-]
 *  [akka学习教程(七) 内置状态转换Procedure][akka_ _Procedure]
 *  [akka学习教程(六) 路由器Router][akka_ _Router]
 *  [akka学习教程(五) inbox消息收件箱][akka_ inbox]
 *  [akka学习教程(四) actor生命周期][akka_ actor]
 *  [akka学习教程(三) 不可变对象][akka_]
 *  [akka学习教程(二)HelloWord][akka_HelloWord]
 *  [akka学习教程(一)简介][akka]

我们都知道在编写java线程的时候，要传递不可变对象，这里akka也是如此  
下面这个例子就是传递不可变对象：

package akka.unmodifiable;
    
    import java.util.Collections;
    import java.util.List;
    
    /** * Created by liubenlong on 2017/1/5. * * actor中传递的对象要是不可变对象。当然是为了安全了 */
    public final class Message { 
    
        private final int age;
        private final List<String> list;
    
        public Message(int age, List<String> list){
            this.age = age;
            /** * 把普通list包装为不可变对象 */
            this.list = Collections.unmodifiableList(list);
        }
    
        public int getAge() {
            return age;
        }
    
        public List<String> getList() {
            return list;
        }
    }

package akka.unmodifiable;
    
    import akka.actor.UntypedActor;
    import com.alibaba.fastjson.JSONObject;
    
    public class Greeter extends UntypedActor { 
    
      @Override
      public void onReceive(Object msg) throws InterruptedException {
    
        try {
          System.out.println("Greeter收到的数据为：" + JSONObject.toJSONString(msg));
          getSender().tell("Greeter工作完成。", getSelf());//给发送至发送信息.
        }catch (Exception e){
          e.printStackTrace();
        }
    
      }
    
    }

package akka.unmodifiable;
    
    import akka.actor.ActorRef;
    import akka.actor.Props;
    import akka.actor.UntypedActor;
    import com.alibaba.fastjson.JSONObject;
    
    import java.util.Arrays;
    
    public class HelloWorld extends UntypedActor { 
    
      ActorRef greeter;
    
      @Override
      public void preStart() {
        // create the greeter actor
        greeter = getContext().actorOf(Props.create(Greeter.class), "greeter");
        System.out.println("Greeter actor path：" + greeter.path());
        // tell it to perform the greeting
        greeter.tell(new Message(2, Arrays.asList("2", "dsf")), getSelf());
      }
    
      @Override
      public void onReceive(Object msg) {
        try {
          System.out.println("HelloWorld收到的数据为：" + JSONObject.toJSONString(msg));
        }catch (Exception e){
          e.printStackTrace();
        }
      }
    }

package akka.unmodifiable;
    
    import akka.actor.ActorRef;
    import akka.actor.ActorSystem;
    import akka.actor.Props;
    import com.typesafe.config.ConfigFactory;
    
    public class Main { 
    // public static void main(String[] args) { 
    // akka.Main.main(new String[] { HelloWorld.class.getName() });
    // }
    
      public static void main(String[] args) {
        //创建ActorSystem。一般来说，一个系统只需要一个ActorSystem。
        //参数1：系统名称。参数2：配置文件
        ActorSystem system = ActorSystem.create("Hello", ConfigFactory.load("akka.config"));
        ActorRef a = system.actorOf(Props.create(HelloWorld.class), "helloWorld");
        System.out.println(a.path());
      }
    }

# 参考资料 #

*  书籍《java高并发程序设计》
 *  [AKKA官方文档][AKKA]

[akka_ akka]: http://blog.csdn.net/liubenlong007/article/details/54603296
[akka_ akka 1]: http://blog.csdn.net/liubenlong007/article/details/54601998
[akka_ Spring_Akka]: http://blog.csdn.net/liubenlong007/article/details/54601448
[akka_ akka 2]: http://blog.csdn.net/liubenlong007/article/details/54584303
[akka_ agent]: http://blog.csdn.net/liubenlong007/article/details/54576611
[akka_ STM]: http://blog.csdn.net/liubenlong007/article/details/54576412
[akka_ Actor_Future-]: http://blog.csdn.net/liubenlong007/article/details/54575312
[akka_ _Procedure]: http://blog.csdn.net/liubenlong007/article/details/54574878
[akka_ _Router]: http://blog.csdn.net/liubenlong007/article/details/54574064
[akka_ inbox]: http://blog.csdn.net/liubenlong007/article/details/54377820
[akka_ actor]: http://blog.csdn.net/liubenlong007/article/details/54093889
[akka_]: http://blog.csdn.net/liubenlong007/article/details/54093794
[akka_HelloWord]: http://blog.csdn.net/liubenlong007/article/details/53782971
[akka]: http://blog.csdn.net/liubenlong007/article/details/53782966
[AKKA]: http://akka.io/docs/