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Erschienen in:
2010 | OriginalPaper | Buchkapitel
Behavioural Contracts with Request-Response Operations
verfasst von : Lucia Acciai, Michele Boreale, Gianluigi Zavattaro
Erschienen in: Coordination Models and Languages
Verlag: Springer Berlin Heidelberg
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In the context of service-oriented computing, behavioural contracts are abstract descriptions of the message-passing behaviour of services. They can be used to check properties of service compositions such as, for instance, client-service compliance. Previous formal models for contracts consider unidirectional
send
and
receive
operations. In this paper, we present two models for contracts with bidirectional
request-response
operations, in the presence of unboundedly many instances of both clients and servers. The first model takes inspiration from the abstract service interface language
WSCL
, the second one is inspired by
Abstract WS-BPEL
. We prove that client-service compliance is decidable in the former while it is undecidable in the latter, thus showing an interesting expressiveness gap between the modeling of
request-response
operations in
WSCL
and in
Abstract WS-BPEL
.