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Reactive Extensions for .NET
- 1. Reactive Extensions for .NET Andrei Marukovich contact@lunarfrog.com twitter: @amarukovich
- 2. Rx is a library for composing asynchronous and event-based programs using observable sequences and LINQ-style query operators. Rx = Observables + LINQ + Schedulers
- 4. Enumerables interface IEnumerable<out T> { IEnumerator<T> GetEnumerator(); } interface IEnumerator<out T> : IDisposable { T Current { get; } bool MoveNext(); void Reset(); }
- 5. Pull and Push Consumer Pull Any new data? IEnumerable • • • • Sensors UI events Web services Social media Source IObservable Push New data available!
- 6. Observables interface IObservable<out T> { IDisposable Subscribe(IObserver<T> observer); } interface IObserver<out T> { void OnNext(T value); void OnError(Exception error); void OnCompleted(); }
- 8. Contract OnNext* [OnComplete | OnError] 1 2 1 3 2 1 2 1 2 3 4 3 3 4 4 5 6
- 9. Demo: Observable sequences • Subject<T> • Observable • Never, Empty, Return, Throw, Create • Range, Generate, Repeat • Interval, Timer
- 10. LINQ Filtering • Where, Distinct, Skip(While|Last|Until), Take Inspection • Any, All Aggregation and transformation • Count, Min, Max, Average, Select
- 11. Demo: LINQ • Common LINQ operators • Combining sequences • Pairing • Sequentially • Concurrently
- 12. Rx bridges • Observable.FromAsync() • Observable.FromEvent() • Observable.FromEventPattern()
- 13. Demo: LINQ to events • Time shifting • Throttle • Sample • Buffer • Delay
- 14. Concurrency SubscribeOn • Invocation of the subscription ObserveOn • Observing of notifications
- 16. Schedulers • ImmediateScheduler • CurrentThreadScheduler • DispatcherScheduler • EventLoopScheduler • NewThreadScheduler • Thread/Task Pool • TestScheduler
- 17. Flavors of Rx .NET • WinForms, WPF, Silverlight • Windows Phone, WinRT • ASP .NET Beyond .NET • RxJS, RxCpp • RxPy, Rx.rb
- 19. Thank you! Andrei Marukovich contact@lunarfrog.com twitter: @amarukovich