Global Escape in Multiparty Sessions

Authors Sara Capecchi, Elena Giachino, Nobuko Yoshida

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Sara Capecchi
Elena Giachino
Nobuko Yoshida

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Sara Capecchi, Elena Giachino, and Nobuko Yoshida. Global Escape in Multiparty Sessions. In IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2010). Leibniz International Proceedings in Informatics (LIPIcs), Volume 8, pp. 338-351, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2010)


This paper proposes a global escape mechanism which can handle unexpected or unwanted conditions changing the default execution of distributed communicational flows, preserving compatibility of the multiparty conversations. Our escape is realised by a collection of asynchronous local exceptions which can be thrown at any stage of the communication and to any subsets of participants in a multiparty session. This flexibility enables to model complex exceptions such as criss-crossing global interactions and fault tolerance for distributed cooperating threads. Guided by multiparty session types, our semantics automatically provides an efficient termination algorithm for global escapes with low complexity of exception messages.
  • escape mechanism
  • exception handling
  • multiparty communication


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