Analysing Web Service Composition with PEPA
نویسندگان
چکیده
Web services are an emerging paradigm aiming to offer the interoperability afforded by web applications combined with rich client interaction. Web service composition allows a distributed application to be constructed from a number of previously published web services. This component-based style of implementation offers many benefits to the developer, but the reliance of third party hardware and software only exacerbates the unpredictability of application performance. In this paper we present a first step towards addressing this problem, demonstrating an automatic mechanism for developing a performance model based on a web service composition. The web service composition language that we consider is the Business Process Execution Language for Web Services (BPEL4WS or simply BPEL) [3]. It is an XML-based language and is implemented as a high level specification. This specification provides a means for using a composition of web services to perform applications, normally the automation of a business process incorporating:
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