RxJava - IO Scheduler

Schedulers.io() 方法创建并返回一个用于 IO 边界任务的调度程序。线程池可根据需要扩展。最适合 IO 密集型操作。

Schedulers.io() 示例

使用任意编辑器在您的选择中创建以下 Java 程序，例如，C:\> RxJava。

ObservableTester.java

import java.util.Random;

import io.reactivex.Observable;
import io.reactivex.schedulers.Schedulers;

public class ObservableTester  {
   public static void main(String[] args) throws InterruptedException {
      Observable.just("A", "AB", "ABC")
         .flatMap(v -> getLengthWithDelay(v)
         .doOnNext(s -> System.out.println("Processing Thread " 
            + Thread.currentThread().getName()))
         .subscribeOn(Schedulers.io()))
         .subscribe(length -> System.out.println("Receiver Thread " 
            + Thread.currentThread().getName() 
            + ", Item length " + length));

         Thread.sleep(10000);
   }
   protected static Observable<Integer> getLengthWithDelay(String v) {
      Random random = new Random();
      try {
         Thread.sleep(random.nextInt(3) * 1000);
         return Observable.just(v.length());
      } catch (InterruptedException e) {
         e.printStackTrace();
      }
      return null;
   }
}

验证结果

使用 **javac** 编译器编译类，如下所示 −

C:\RxJava>javac ObservableTester.java

现在运行 ObservableTester，如下所示 −

C:\RxJava>java ObservableTester

应该会生成以下输出 −

Processing Thread RxCachedThreadScheduler-1
Receiver Thread RxCachedThreadScheduler-1, Item length 1
Processing Thread RxCachedThreadScheduler-1
Receiver Thread RxCachedThreadScheduler-1, Item length 2
Processing Thread RxCachedThreadScheduler-1
Receiver Thread RxCachedThreadScheduler-1, Item length 3