我们如何在Java 9中实现SubmissionPublisher类？

• Z时代
• 2024-01-10
• 分类：综合

从Java 9开始，我们可以通过引入四个核心接口（Publisher，Subscriber，Subscription，Processor和一个具体的类）来创建R eactive Streams：实现Publisher 接口的SubmissionPublisher 。每个接口都扮演着不同的角色，这与响应 流的原理相对应。我们可以使用SubmissionPublisher 类的Submit()方法将提供的项目发布给每个订阅者。

语法

public class SubmissionPublisher<T> extends Object implements Flow.Publisher<T>, AutoCloseable

在下面的示例中，我们可以实现SubmissionPublisher类

示例

import java.util.concurrent.Flow.Subscriber;
import java.util.concurrent.Flow.Subscription;
import java.util.concurrent.SubmissionPublisher;
class MySubscriber<T> implements Subscriber<T> {
   private Subscription subscription;
   private String name;
   public MySubscriber(String name) {
      this.name = name;
   }
   @Override   public void onComplete() {
      System.out.println(name + ": onComplete");
   }
   @Override   public void onError(Throwable t) {
      System.out.println(name + ": onError");
      t.printStackTrace();
   }
   @Override   public void onNext(T msg) {
      System.out.println(name + ": " + msg.toString() + " received in onNext");
      subscription.request(1);
   }
   @Override   public void onSubscribe(Subscription subscription) {
      System.out.println(name + ": onSubscribe");
      this.subscription = subscription;
      subscription.request(1);
   }
}// Main classpublic class FlowTest {
   public static void main(String args[]) {
      SubmissionPublisher<String> publisher = new SubmissionPublisher<>();
      MySubscriber<String> subscriber = new MySubscriber<>("Mine");
      MySubscriber<String> subscriberYours = new MySubscriber<>("Yours");
      MySubscriber<String> subscriberHis = new MySubscriber<>("His");
      MySubscriber<String> subscriberHers = new MySubscriber<>("Her");
      publisher.subscribe(subscriber);
      publisher.subscribe(subscriberYours);
      publisher.subscribe(subscriberHis);
      publisher.subscribe(subscriberHers);
      publisher.submit("One");
      publisher.submit("Two");
      publisher.submit("Three");
      publisher.submit("Four");
      publisher.submit("Five");
      try {
         Thread.sleep(1000);
      } catch(InterruptedException e) {
         e.printStackTrace();
      }
      publisher.close();
   }
}

输出结果

Yours: onSubscribe
His: onSubscribe
Mine: onSubscribe
His: One received in onNext
Yours: One received in onNext
Mine: One received in onNext
Yours: Two received in onNext
His: Two received in onNext
Yours: Three received in onNext
Mine: Two received in onNext
Yours: Four received in onNext
His: Three received in onNext
Yours: Five received in onNext
Mine: Three received in onNext
Her: onSubscribe
His: Four received in onNext
Her: One received in onNext
Mine: Four received in onNext
Her: Two received in onNext
His: Five received in onNext
Her: Three received in onNext
Mine: Five received in onNext
Her: Four received in onNext
Her: Five received in onNext
Yours: onComplete
His: onComplete
Mine: onComplete
Her: onComplete

以上是 我们如何在Java 9中实现SubmissionPublisher类？ 的全部内容， 来源链接： utcz.com/z/356730.html