Specification of Context for Management of Service-Oriented Systems with WS-Policy4MASC
Vladimir Tošić, Rasangi Pumudu Karunaratne, Qinghua Lu · IGI Global eBooks · 2010
Specification of monitored context properties and their influence on operation of service-oriented systems and on management activities is a prerequisite for context-sensitive operation. We researched context specification for a management system performing various management activities and potentially used by mobile service-oriented systems. Due to the similarities between processing and use of context properties and processing and use of quality of service (QoS) metrics, we decided to model context properties analogously to QoS metrics. We built our solutions for specification of context properties and related management activities into two languages: the Web Service Offerings Language (WSOL) and WS-Policy4MASC, the latter of which is the focus of this book chapter. WS-Policy4MASC is a powerful extension of the industrial standard Web Services Policy Framework (WS-Policy) with constructs for specification of information necessary for run-time policy-driven management. The presented constructs related to context increase usefulness of WS-Policy4MASC for management of mobile service-oriented systems.