Handshaking Protocol for Distributed Implementation of Reo

Natallia Kokash
(Leiden Institute of Advanced Computer Science (LIACS))

Reo, an exogenous channel-based coordination language, is a model for service coordination wherein services communicate through connectors formed by joining binary communication channels. In order to establish transactional communication among services as prescribed by connector semantics, distributed ports exchange handshaking messages signalling which parties are ready to provide or consume data. In this paper, we present a formal implementation model for distributed Reo with communication delays and outline ideas for its proof of correctness. To reason about Reo implementation formally, we introduce Timed Action Constraint Automata (TACA) and explain how to compare TACA with existing automata-based semantics for Reo. We use TACA to describe handshaking behavior of Reo modeling primitives and argue that in any distributed circuit remote Reo nodes and channels exposing such behavior commit to perform transitions envisaged by the network semantics.

In Javier Cámara and José Proença: Proceedings 13th International Workshop on Foundations of Coordination Languages and Self-Adaptive Systems (FOCLASA 2014), Rome, Italy, 6th September 2014, Electronic Proceedings in Theoretical Computer Science 175, pp. 1–17.
Published: 11th February 2015.

ArXived at: http://dx.doi.org/10.4204/EPTCS.175.1 bibtex PDF
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