Scala与Java8的Future转化

在学习Akka时,自然会接触到scala语言,对于用惯了java的程序员来说,使用JAVA的Future的特性更为熟练。所以有了本篇文章。

本节主要讨论feature在这两种语言中的转换与使用。

        
            org.scala-lang.modules
            scala-java8-compat_2.11
            0.8.0
        


为实现转换,要用到上面的依赖,具体使用对比下面的示例。

import static scala.compat.java8.FutureConverters.toJava;

 @Test
    public void testGreeterActorSendingOfGreeting3() throws InterruptedException {
        CountDownLatch latch=new CountDownLatch(1);
        final TestKit testProbe = new TestKit(system);
        final ActorRef helloGreeter = system.actorOf(Greeter.props("Hello", testProbe.getRef()));
        helloGreeter.tell(new Greeter.WhoToGreet("Akka"), ActorRef.noSender());
        Future ask = ask(helloGreeter, new Greeter.Greet(), 2000);
        //scala
        ask.onComplete(o->{
            Printer.Greeting greeting = testProbe.expectMsgClass(Printer.Greeting.class);
            assertEquals("Hello, Akka", o);
            return null;
        },system.dispatcher());
        latch.await();

    }
    @Test
    public void testGreeterActorSendingOfGreeting4() throws InterruptedException {
        CountDownLatch latch=new CountDownLatch(1);
        final TestKit testProbe = new TestKit(system);
        ActorRef printActor = system.actorOf(Printer.props());
        final ActorRef helloGreeter = system.actorOf(Greeter.props("Hello", printActor));
        helloGreeter.tell(new Greeter.WhoToGreet("Akka"), ActorRef.noSender());
        Future ask = ask(helloGreeter, new Greeter.Greet(), 1000);
        //java
        CompletionStage future = toJava(ask);
        future.thenAccept(r->{
            System.out.println("result:"+r);
        });

        latch.await();
    }
toJava(ask);
        future.thenAccept(r->{
            System.out.println("result:"+r);
        });

        latch.await();
    } 
  

 

 

 

 

        //scala
        ask.onComplete(new OnComplete() {
            @Override
            public void onComplete(Throwable throwable, Object o) throws Throwable {

            }
        }, system.dispatcher()); 
  

 

 

你可能感兴趣的:(Akka实践)