Management applications of the Web Service Offerings Language (WSOL)

Authors:
Vladimir Tosic;Bernard Pagurek;Kruti Patel;Babak Esfandiari;Wei Ma
Affiliations:
Department of Systems and Computer Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, Ont., Canada K1S 5B6;Department of Systems and Computer Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, Ont., Canada K1S 5B6;Department of Systems and Computer Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, Ont., Canada K1S 5B6;Department of Systems and Computer Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, Ont., Canada K1S 5B6;Department of Systems and Computer Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, Ont., Canada K1S 5B6
Venue:
Information Systems - Special issue: The 15th international conference on advanced information systems engineering (CAiSE 2003)
Year:
2005

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Abstract

We discuss Web Service Management (WSM) and Web Service Composition Management (WSCM) applications of the Web Service Offerings Language (WSOL) and how the language supports these applications. WSOL is a language for the formal specification of classes of service, various constraints (functional constraints, Quality of Service-QoS, and access rights), and management statements (prices, monetary penalties, and management responsibilities) for Web Services. Describing a Web Service in WSOL, in addition to the Web Services Description Language, enables monitoring, metering, accounting, and management of Web Services. Metering of QoS metrics and evaluation of constraints can be the responsibility of the provider Web Service, the consumer, and/or one or more mutually trusted third parties (SOAP intermediaries or probes). Further, manipulation (switching, deactivation, reactivation, deletion, or creation) of classes of service can be used for dynamic (run-time) adaptation and management of Web Service compositions. To demonstrate the usefulness of WSOL for WSM and WSCM, we have developed a corresponding management infrastructure, the Web Service Offerings Infrastructure (WSOI). WSOI enables monitoring of WSOL-enabled Web Services and dynamic manipulation of their classes of service.