Reactive Programming by UniRx for Asynchronous & Event Processing
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This document introduces Reactive Programming and UniRx, which is a Reactive Extensions (Rx) library for Unity. It discusses how Rx allows for better event handling and asynchronous programming in Unity by treating events as observable sequences. UniRx brings the benefits of Rx such as LINQ-style querying and orchestration of events and asynchronous operations to Unity. It is available on GitHub and the Unity Asset Store for free.
![var parallel = Observable.WhenAll(
ObservableWWW.Get("http://google.com/"),
ObservableWWW.Get("http://bing.com/"),
ObservableWWW.Get("http://unity3d.com/"));
parallel.Subscribe(xs =>
{
Debug.Log(xs[0].Substring(0, 100)); // google
Debug.Log(xs[1].Substring(0, 100)); // bing
Debug.Log(xs[2].Substring(0, 100)); // unity
});](https://image.slidesharecdn.com/unirx-140730063356-phpapp01/85/Reactive-Programming-by-UniRx-for-Asynchronous-Event-Processing-34-320.jpg)
![IObservable<T> time
IObservable<T> time
WhenAll
Observable.WhenAll(
ObservableWWW.Get(),
ObservableWWW.Get(),
ObservableWWW.Get())
Subscribe(xs => xs[0], xs[1], xs[2])](https://image.slidesharecdn.com/unirx-140730063356-phpapp01/85/Reactive-Programming-by-UniRx-for-Asynchronous-Event-Processing-35-320.jpg)
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Reactive Programming by UniRx for Asynchronous & Event Processing
- 1. Reactive Programming by UniRx for Asynchronous & Event Processing 2014/07/30 Yoshifumi Kawai - @neuecc
- 2. Self Introduction @ CTO C# 5.0 + .NET Framework 4.5 + ASP.NET MVC 5 C# Web @ Microsoft MVP for Visual C# / C# Web http://neue.cc/ Twitter @neuecc
- 4. Functional Reactive Programming http://en.wikipedia.org/wiki/Functional_reactive_programming Excel …… Reactive Extensions FRP (Haskell ) 2009 .NET Reactive Extensions
- 5. Functional Reactive Programming http://en.wikipedia.org/wiki/Functional_reactive_programming Excel …… Reactive Extensions FRP (Haskell ) 2009 .NET Reactive Extensions UniRx ReactiveExtensions(Rx) Unity
- 6. Gartner’s Hype Cycle 2013 Application Architecture/Application Development On the Rise - Reactive Programming
- 7. Technology Radar Languages & Framework ThoughtWorks Technology Radar July 2014 Rx ADOPT OK TRIAL ASSESS HOLD
- 8. Across Languages RxJava Netflix for Java/Scala ReactiveCocoa GitHub 5073 for Objective-C RxJS/bacon.js JavaScript RxJS bacon.js
- 10. UniRx
- 11. UniRx 100 Asset Store Reactive Programming Reactive Extensions RxJava Wiki
- 12. UniRx - Reactive Extensions for Unity
- 13. Reactive Extensions(Rx) is LINQ C# LINQ LINQ(to Objects) C# Rx LINQ LINQ Reactive Programming Rx
- 14. UniRx is .NET(C#) Rx Unity https://github.com/neuecc/UniRx http://u3d.as/7tT (Asset Store, Price : FREE) Rx + Unity C# …… https://rx.codeplex.com/ Bart De Smet Microsoft Unity :)
- 15. Q C# LINQ Rx 5 …… 3 @IT http://www.atmarkit.co.jp/fdotnet/introrx/introrx_01/introrx_01_01.html AOT Safe LINQ iOS AOT Unity + iOS AOT http://neue.cc/2014/07/01_474.html
- 16. Reactive Extensions is LINQ to Events LINQ to Asynchronous
- 17. Event is Observable Sequence Rx IObservable<T> time OnTap 3 Tap 5 Tap 1 Tap
- 18. IEnumerable <-> IObservable IObservable<T> time IEnumerable<T> length IEnumerable<T> length .Where(x => x % 2 == 0) IObservable<T> time .Where(x => x % 2 == 0) Where LINQ
- 19. Push Event Stream Event Processing Interactive/Visualize
- 20. Internet of Things Push Kinect Oculus Twitter Streaming PubSub, WebSocket Logs are Stream(Fluentd, Amazon Kinesis, Azure Event Hubs) MonoBehaviour Update , OnMouseClick, etc...
- 21. LINQ
- 22. LINQ LINQ LINQ
- 24. Limitations of .NET Events // public event Action<int> OnHitDamage; // player.OnHitDamage += (damage) => { if (damage >= 1000) { // " " } }; player.OnHitDamage -= /* */
- 25. Observable Sequence to the Rescue IObservable<int> onHitDamage = player.OnHitDamage; var criticalHit = onHitDamage .Where(x =>x >= 1000); var subscription = criticalHit.Subscribe(damage => /* ... */); subscription.Dispose(); LINQ
- 26. Lifecycle Resource Management // Disposable CompositeDisposable subscriptions = new CompositeDisposable(); void Awake() { var player = new Player(); var enemy1 = new Player(); var enemy2 = new Player(); // player.OnHitDamage.Subscribe().AddTo(subscriptions); enemy1.OnHitDamage.Subscribe().AddTo(subscriptions); enemy2.OnHitDamage.Subscribe().AddTo(subscriptions); } void OnDestroy() { // subscriptions.Dispose(); }
- 28. yield return is awaitable IEnumerator GetBingText() { var www = new WWW("http://bing.com/"); yield return www; // Debug.Log(www.text); } It’s Unity’s awesome feature!
- 29. But... IEnumerator GetGoogle() { var www = new WWW("http://google.com/"); yield return www; } IEnumerator OnMouseDown() { try { // yield return StartCoroutine(GetGoogle()); } catch { } } IEnumerator yield return try-catch
- 30. IEnumerator GetGoogle(Action<string> onCompleted, Action<Exception> onError) { var www = new WWW("http://google.com/"); yield return www; if (!www.error) onError(new Exception(www.error)); else onCompleted(www.text); } ……(JavaScript ) IEnumerator
- 31. Rx Unity ObservableWWW.Get("http://google.co.jp/") .SelectMany(x => ObservableWWW.Get(x)) // .Retry(3) // 3 .Subscribe( x => Debug.Log(x), // ex => Debug.LogException(ex)); // Rx x x x
- 32. Why can Rx apply to asynchronous? x IEnumerable<T> IObservable<T> IObservable<T> time event async IE<T>
- 33. Why can Rx apply to asynchronous? x IEnumerable<T> IObservable<T> IObservable<T> time event async IE<T> Orchestrate Rx
- 34. var parallel = Observable.WhenAll( ObservableWWW.Get("http://google.com/"), ObservableWWW.Get("http://bing.com/"), ObservableWWW.Get("http://unity3d.com/")); parallel.Subscribe(xs => { Debug.Log(xs[0].Substring(0, 100)); // google Debug.Log(xs[1].Substring(0, 100)); // bing Debug.Log(xs[2].Substring(0, 100)); // unity });
- 35. IObservable<T> time IObservable<T> time WhenAll Observable.WhenAll( ObservableWWW.Get(), ObservableWWW.Get(), ObservableWWW.Get()) Subscribe(xs => xs[0], xs[1], xs[2])
- 36. Conclusion
- 37. Reactive Programming UniRx Available Now GitHub - https://github.com/neuecc/UniRx/ Asset Store(FREE) – http://u3d.as/7tT Update (v4.4)