Scacla与Java8的Feature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feature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。

        <dependency>            <groupId>org.scala-lang.modules</groupId>            <artifactId>scala-java8-compat_2.11</artifactId>            <version>0.8.0</version>        </dependency>

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<Object> 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<Object> ask = ask(helloGreeter, new Greeter.Greet(), 1000);        //java        CompletionStage<Object> future = toJava(ask);        future.thenAccept(r->{            System.out.println("result:"+r);        });        latch.await();    }

        //scala        ask.onComplete(new OnComplete<Object>() {            @Override            public void onComplete(Throwable throwable, Object o) throws Throwable {            }        }, system.dispatcher());