具有匿名线程的反应堆调度程序

debugcn 发表于 Dev

皮斯兹

我正在测试 reactor 的工作原理，创建了与 reactor 文档中的代码非常相似的代码。

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import reactor.core.publisher.Mono;
import reactor.core.scheduler.Scheduler;
import reactor.core.scheduler.Schedulers;

@SpringBootTest
@RunWith(SpringRunner.class)
public class ReactorApplicationTests {

  @Test
  public void publishOnThreadTest() {
    Scheduler s = Schedulers.newParallel("parallel-scheduler", 4);

    final Mono<String> mono = Mono.just("Publish on test: \n")
            .map(msg -> msg + "before: " + Thread.currentThread() )
            .publishOn(s)
            .map(msg -> msg + "\nafter: " + Thread.currentThread());

    new Thread(() -> mono.subscribe(System.out::println)).start();
  }
}

我不能让它运行，我做错了什么？只需订阅它就可以工作，但我想查看使用的线程并使用它。

阿列克谢·凯戈罗多夫

您的测试程序不打印任何内容的原因是它退出得太早。它应该等到 substriber 的方法被调用：

@Test
public void publishOnThreadTest() throws InterruptedException {
    Scheduler s = Schedulers.newParallel("parallel-scheduler", 4);
    CountDownLatch latch = new CountDownLatch(1);

    final Mono<String> mono = Mono.just("Publish on test: \n")
            .map(msg -> msg + "before: " + Thread.currentThread() )
            .publishOn(s)
            .map(msg -> msg + "\nafter: " + Thread.currentThread());

    new Thread(() -> mono.subscribe((String str) ->{
        System.out.println(str);
        latch.countDown();
    })).start();

    latch.await();
}

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