SampleWorker_2.java

public class SampleWorker extends RxWorker {
  
  // Our custom parameter
  private final Retrofit retrofit;
  
  @Inject
  public SampleWorker(
            @NonNull Context context,
            @NonNull WorkerParameters parameters,
            Retrofit retrofit) {
    super(context, parameters);
    this.retrofit = retrofit;
  }
  
  public Single<Result> createWork() {
    // Create a single observer which will hit a url and nothing else.
    return Observable.range(0, 100)
            .flatMap { download("https://www.google.com") }
            .toList()
            .map { Result.success() };
  }
}