RxTaskRepository

RxTaskRepository.kt

class TaskRepository(private val localDS: DataSource, 
                     private val remoteDS: RemoteDataSource) {

  fun allTasksByUser(user: User): Observable<List<Task>> =
    localDS.allTasksByUser(user)
      .subscribeOn(Schedulers.io())
      .observeOn(Schedulers.computation())
      .onErrorResumeNext { _: Throwable -> remoteDS.allTasksByUser(user) }
}