2026-07-23T03:27:24Z https://drops.dagstuhl.de/oai

oai:drops-oai.dagstuhl.de:18194 2024-03-06T11:01:20Z ddc:004 open_access

Designing Asynchronous Multiparty Protocols with Crash-Stop Failures Barwell, Adam D. Hou, Ping Yoshida, Nobuko Zhou, Fangyi Session Types Concurrency Failure Handling Code Generation Scala Session types provide a typing discipline for message-passing systems. However, most session type approaches assume an ideal world: one in which everything is reliable and without failures. Yet this is in stark contrast with distributed systems in the real world. To address this limitation, we introduce Teatrino, a code generation toolchain that utilises asynchronous multiparty session types (MPST) with crash-stop semantics to support failure handling protocols. We augment asynchronous MPST and processes with crash handling branches. Our approach requires no user-level syntax extensions for global types and features a formalisation of global semantics, which captures complex behaviours induced by crashed/crash handling processes. The sound and complete correspondence between global and local type semantics guarantees deadlock-freedom, protocol conformance, and liveness of typed processes in the presence of crashes. Our theory is implemented in the toolchain Teatrino, which provides correctness by construction. Teatrino extends the Scribble multiparty protocol language to generate protocol-conforming Scala code, using the Effpi concurrent programming library. We extend both Scribble and Effpi to support crash-stop behaviour. We demonstrate the feasibility of our methodology and evaluate Teatrino with examples extended from both session type and distributed systems literature. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Adam D. Barwell and Ping Hou and Nobuko Yoshida and Fangyi Zhou 2023 Is Part Of LIPIcs, Volume 263, 37th European Conference on Object-Oriented Programming (ECOOP 2023) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/LIPIcs.ECOOP.2023.1 urn:nbn:de:0030-drops-181944 https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ECOOP.2023.1 eng https://creativecommons.org/licenses/by/4.0/legalcode