Choral: Object-oriented Choreographic Programming #250
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Choral: Objectoriented Choreographic Programming
Choreographies are coordination plans for concurrent and distributed systems, which define the roles of the involved participants and how they are supposed to work together. In the paradigm of choreographic programming, choreographies are programs that can be compiled into executable implementations. In this article, we present Choral, the first choreographic programming language based on mainstream abstractions. The key idea in Choral is a new notion of data type, which allows for expressing that data is distributed over different roles. We use this idea to reconstruct the paradigm of choreographic programming through objectoriented abstractions. Choreographies are classes, and instances of choreographies are objects with states and behaviours implemented collaboratively by roles. Choral comes with a compiler that, given a choreography, generates an implementation for each of its roles. These implementations are libraries in pure Java, whose types are under the control of the Choral programmer. Developers can then modularly compose these libraries in their programs, to participate correctly in choreographies. Choral is the first incarnation of choreographic programming offering
Giallorenzo, Saverio, et al. “Choral: ObjectOriented Choreographic Programming. ACM Transactions on Programming Languages and Systems, vol. 46, no. 1, Jan. 2024, pp. 159. Crossref, https://doi.org/10.1145/3632398.
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