Java 9 - 响应式流 ( Reactive Streams ) API 支持

package com.lfsun.java9study.flow;

import java.util.concurrent.Flow;
import java.util.concurrent.SubmissionPublisher;
import java.util.concurrent.TimeUnit;

public class ReactiveStreamsExample {
    
    

    public static void main(String[] args) {
    
    
        // 创建一个发布者
        SubmissionPublisher<String> publisher = new SubmissionPublisher<>();

        // 创建一个订阅者
        Flow.Subscriber<String> subscriber = new Flow.Subscriber<>() {
    
    
            private Flow.Subscription subscription;

            @Override
            public void onSubscribe(Flow.Subscription subscription) {
    
    
                this.subscription = subscription;
                subscription.request(1); // 请求一个数据项
            }

            @Override
            public void onNext(String item) {
    
    
                System.out.println("Received: " + item);
                subscription.request(1); // 请求下一个数据项
            }

            @Override
            public void onError(Throwable throwable) {
    
    
                System.err.println("Error occurred: " + throwable.getMessage());
            }

            @Override
            public void onComplete() {
    
    
                System.out.println("Subscription completed.");
            }
        };

        // 订阅发布者
        publisher.subscribe(subscriber);

        // 发布数据
        publisher.submit("Data 1");
        publisher.submit("Data 2");
        publisher.submit("Data 3");

        // 关闭发布者
        publisher.close();

        try {
    
    
            TimeUnit.SECONDS.sleep(1);
        } catch (InterruptedException e) {
    
    
            throw new RuntimeException(e);
        }
    }
}