RxJava - IO Scheduler

This Scheduler is similar to the newThread except for the fact that already started threads are recycled and can possibly handle future requests.

This implementation works similarly to ThreadPoolExecutor from java.util.concurrent with an unbounded pool of threads. Every time a new worker is requested, either a new thread is started (and later kept idle for some time) or the idle one is reused

Example:

public class RxSchedulers {
    
    public static void main(String[] args) throws InterruptedException
    {
        
         Observable.just("Rx", "Java", "Scheduler")
         .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 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;
   }

}

Output:

Processing Thread RxCachedThreadScheduler-2
Processing Thread RxCachedThreadScheduler-3
Processing Thread RxCachedThreadScheduler-1
Receiver Thread RxCachedThreadScheduler-2, Item length 4
Receiver Thread RxCachedThreadScheduler-1, Item length 2
Receiver Thread RxCachedThreadScheduler-1, Item length 9

 

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RXJava Tutorials
RxJava Tutorial RxJava - Environment Setup RxJava’s Characteristics RxJava - How Observable works RxJava - Single Observable RxJava - MayBe Observable RxJava - Completable Observable RxJava - Using CompositeDisposable RxJava - Creating Operators RxJava - Transforming Operators RxJava - Filtering Operators RxJava - Combining Operators RxJava - Utility Operators RxJava - Conditional Operators RxJava - Mathematical Operators RxJava - Subjects RxJava - PublishSubject RxJava - BehaviorSubject RxJava - AsyncSubject RxJava - ReplaySubject RxJava - Schedulers RxJava - Trampoline Scheduler RxJava - NewThread Scheduler RxJava - Computation Scheduler RxJava - IO Scheduler RxJava - From Scheduler RxJava - Buffering