Tackling the Awkward Squad for Reactive Programming: The Actor-Reactor Model

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Reactive programming is a programming paradigm whereby programs are internally represented by a dependency graph, which is used to automatically (re)compute parts of a program whenever its input changes. In practice reactive programming can only be used for some parts of an application: a reactive program is usually embedded in an application that is still written in ordinary imperative languages such as JavaScript or Scala. In this paper we investigate this embedding and we distill ``the awkward squad for reactive programming'' as 3 concerns that are essential for real-world software development, but that do not fit within reactive programming. They are related to long lasting computations, side-effects, and the coordination between imperative and reactive code. To solve these issues we design a new programming model called the Actor-Reactor Model in which programs are split up in a number of actors and reactors. Actors and reactors enforce a strict separation of imperative and reactive code, and they can be composed via a number of composition operators that make use of data streams. We demonstrate the model via our own implementation in a language called Stella.
Originele taal-2English
Artikelnummer19
Pagina's (van-tot)1-29
Aantal pagina's29
TijdschriftLeibniz international proceedings in informatics
Volume166
DOI's
StatusPublished - 6 nov 2020
EvenementEuropean Conference on Object-Oriented Programming: co-located with SPLASH 2020 -
Duur: 15 nov 202017 nov 2020
https://2020.ecoop.org/

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