我们如何在Java 9中使用发布-订阅模式来实现Flow API呢？

Flow API (java.util.concurrent.Flow) 已在 Java 9 中引入。它有助于了解发布商和S订阅者界面交互以执行所需操作的不同方式。

Flow API 由发布者、订阅者、订阅和处理器接口组成，这些接口可以基于反应式流规范。

在下面的示例中，我们可以使用发布者-订阅者接口来实现 Flow API。

示例

import java.util.concurrent.Flow.Publisher;
import java.util.concurrent.Flow.Subscriber;
import java.util.concurrent.Flow.Subscription;

public class FlowAPITest {
   public static void main(String args[]) {
      <strong>Publisher<Integer></strong> publisherSync = new <strong>Publisher<Integer></strong>() {   <strong>// Create publisher</strong>
         <strong>@Override</strong>
         public void <strong>subscribe</strong>(Subscriber<? super Integer><!--? super Integer--> subscriber) {
            for(int i = 0; i < 10; i++) {
               System.out.println(Thread.currentThread().getName() + " | Publishing = " + i);
               subscriber.<strong>onNext</strong>(i);
            }
            subscriber.<strong>onComplete</strong>();
         }
      };
      <strong>Subscriber<Integer></strong> subscriberSync = new <strong>Subscriber<Integer></strong>() {   <strong>// Create subscriber</strong>
         <strong>@Override</strong>
         public void <strong>onSubscribe</strong>(Subscription subscription) {
         }
         <strong>@Override</strong>
         public void <strong>onNext</strong>(Integer item) {
            System.out.println(Thread.currentThread().getName() + " | Received = " + item);
            try {
               Thread.sleep(100);
            } catch(InterruptedException e) {
               e.printStackTrace();
            }
         }
         <strong>@Override</strong>
         public void <strong>onError</strong>(Throwable throwable) {
         }
         <strong>@Override</strong>
         public void <strong>onComplete()</strong> {
         }
      };
      publisherSync.<strong>subscribe</strong>(subscriberSync);
   }
}

输出

<strong>main | Publishing = 0
main | Received = 0
main | Publishing = 1
main | Received = 1
main | Publishing = 2
main | Received = 2
main | Publishing = 3
main | Received = 3
main | Publishing = 4
main | Received = 4
main | Publishing = 5
main | Received = 5
main | Publishing = 6
main | Received = 6
main | Publishing = 7
main | Received = 7
main | Publishing = 8
main | Received = 8
main | Publishing = 9
main | Received = 9</strong>

以上是我们如何在Java 9中使用发布-订阅模式来实现Flow API呢？的详细内容。更多信息请关注PHP中文网其他相关文章！