Dmitry Pasko speech at Ciklum .NET Saturday (Kharkov 21.05.2011)

1. Reactive Extensions “democratize cloud” DimaPasko

2. about me http://flavors.me/dimapasko Kharkov – Ciklum (Scale Point) - .NET – podcasts – open source

3. Erik Meijer Professor at Utrecht University One of the designers of Haskell Microsoft Architect LINQ Volta Rx

4. Rx mission “Rx is a library for composingasynchronous and event-based programs using observable collections.”

6. Stable version: v1.0.10425

7. Experimental Release: v1.1.10425

8. Last update: April 28, 2011

10. “asynchronous”

11. “observable” interfaceIObservable<out T> { IDisposableSubscribe(IObserver<T> observer);} interface IObserver<inT> { voidOnNext(T value); voidOnError(Exception ex); voidOnCompleted(); } interfaceIEnumerable<out T> { IEnumerator<T> GetEnumerator();} interface IEnumerator<out T> : IDisposable { boolMoveNext(); T Current { get; } void Reset(); }

12. Application Got next? MoveNext OnNext Have next! Interactive Reactive Environment IObservable<T> IObserver<T> IEnumerable<T> IEnumerator<T>

13. IDisposable interfaceIObservable<out T> { IDisposableSubscribe(IObserver<T> observer);} interface IObserver<inT> { voidOnNext(T value); voidOnError(Exception ex); voidOnCompleted(); }

14. demo #1 Simple example

15. exception handling Observable.Catch() Observable.Throw() Observable.Retry() Observable.Timeout()

16. demo #2 Exception handling

18. Statements(If, Case, For, While, DoWhile)

19. Combinators(Merge, Zip, Amb, …)

20. Exceptions(Catch, Retry, ..)

22. IScheduler Observable.OnserveOn() Observable.SubscribeOn(Scheduler.TaskPool)

23. demo #3 Big demo!!!

24. Rx unit testing

25. more Rx Rx Contribhttp://rxcontrib.codeplex.com/ Reactive Extensions - Extensions (Rxx)http://rxx.codeplex.com/ Rx Power Toys http://rxpowertoys.codeplex.com/

26. examples

27. ReactiveUI http://www.reactiveui.net/

28. domain events http://chaliy.name/archive/2010/1/business_logic_rx_example

29. TweetSharp.Rx https://github.com/jhollingworth/TweetSharp.Rx

30. Rx in books

32. Marble diagrams

33. Linq2PowerShell, Linq2WMI

34. IQbservable<T>(IQueryable<T> + IObservable<T>)

35. ISubject, Subject<T>

37. summary

38. questions dimapasko@gmail.com pad@ciklum.net @dimapasko