Web service based applications are expected to live in dynamically evolving settings. At run-time, services may undergo changes that could modify their expected behavior. Because of such intrinsic dynamic nature, applications should be designed by adhering to the principles of design-by-contract. Run-time monitoring is needed to check that the contract between service providers and service users is fulfilled while the collaboration is in place. We describe a language to specify the expected functional and non-functional requirements that a service provider should fulfill. The language (Timed WSCoL) is a temporal extension of a previous proposal (WSCoL). We also illustrate the ar- chitecture of a run-time analyzer that checks Timed WSCoL properties. Should such properties be disproved during ex- ecution, appropriate recovery and reconfiguration actions may be put in place.
A timed extension of WSCoL
SPOLETINI, PAOLA
2007-01-01
Abstract
Web service based applications are expected to live in dynamically evolving settings. At run-time, services may undergo changes that could modify their expected behavior. Because of such intrinsic dynamic nature, applications should be designed by adhering to the principles of design-by-contract. Run-time monitoring is needed to check that the contract between service providers and service users is fulfilled while the collaboration is in place. We describe a language to specify the expected functional and non-functional requirements that a service provider should fulfill. The language (Timed WSCoL) is a temporal extension of a previous proposal (WSCoL). We also illustrate the ar- chitecture of a run-time analyzer that checks Timed WSCoL properties. Should such properties be disproved during ex- ecution, appropriate recovery and reconfiguration actions may be put in place.
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