November 2024
Intermediate to advanced
836 pages
29h 1m
French
Content preview from Programmation C# 10
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Chapitre 11. Extensions réactives
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Les Reactive Extensions for .NET (généralement abrégées en Rx) sont conçues pour travailler avec des sources d'information asynchrones et basées sur des événements. React fournit des services qui t'aident à orchestrer et à synchroniser la façon dont ton code réagit aux données provenant de ce type de sources. Nous avons déjà vu comment définir des événements et s'y abonner au chapitre 9, mais Rx offre bien plus que ces fonctionnalités de base. Il fournit une abstraction pour les sources d'événements dont la courbe d'apprentissage est plus raide que celle des événements, mais il est accompagné d'un puissant ensemble d'opérateurs qui facilite grandement la combinaison et la gestion de plusieurs flux d'événements par rapport à ce qui est possible avec les délégués et les événements .NET. Microsoft a également mis à disposition un ensemble associé de bibliothèques appelé Reaqtor qui s'appuie sur les fondations de Rx pour fournir un cadre pour le traitement fiable, avec état, distribué, évolutif et performant des événements dans les services.
L'abstraction fondamentale de Rx, IObservable<T>, représente une séquence d'éléments, et ses opérateurs sont définis comme des méthodes d'extension de cette interface. Cela ressemble beaucoup à LINQ to Objects, et il y a des similitudes - non seulement IObservable<T> a beaucoup en ...
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