Integrated Structure and Semantics for Reo Connectors and Petri Nets

Christian Krause
(CWI)

In this paper, we present an integrated structural and behavioral model of Reo connectors and Petri nets, allowing a direct comparison of the two concurrency models. For this purpose, we introduce a notion of connectors which consist of a number of interconnected, user-defined primitives with fixed behavior. While the structure of connectors resembles hypergraphs, their semantics is given in terms of so-called port automata. We define both models in a categorical setting where composition operations can be elegantly defined and integrated. Specifically, we formalize structural gluings of connectors as pushouts, and joins of port automata as pullbacks. We then define a semantical functor from the connector to the port automata category which preserves this composition. We further show how to encode Reo connectors and Petri nets into this model and indicate applications to dynamic reconfigurations modeled using double pushout graph transformation.

In Filippo Bonchi, Davide Grohmann, Paola Spoletini and Emilio Tuosto: Proceedings 2nd Interaction and Concurrency Experience Structured Interactions (ICE 2009), Bologna, Italy, 31st August 2009, Electronic Proceedings in Theoretical Computer Science 12, pp. 57–69.
Published: 3rd December 2009.

ArXived at: http://dx.doi.org/10.4204/EPTCS.12.4 bibtex PDF

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