VxBPEL: Supporting variability for Web services in BPEL

Abstract

Web services provide a way to facilitate the business integration over the Internet. Flexibility is an important and desirable property of Web service-based systems due to dynamic business environments. The flexibility can be provided or addressed by incorporating variability into a system. In this study, we investigate how variability can be incorporated into service-based systems. We propose a language, VxBPEL, which is an adaptation of an existing language, BPEL, and able to capture variability in these systems. We develop a prototype to interpret this language. Finally, we illustrate our method by using it to handle variability of an example.

A Proposal for a Comparison Framework for the Management of Variability in Web Services Composition

“…The distinction between the approaches is quite clear in the non-functional attribute, because each approach shows its own value. The example of [17] showed a significant number of metrics in the non-functional attribute, with the absence of the metric in (Koning et al, 2009) [24]and (Sun et al, 2010 ). [4] Finally, the main purpose found in most approaches is to ensure flexibility in the SOA.…”

“…[4] Finally, the main purpose found in most approaches is to ensure flexibility in the SOA. Only few approaches provide better satisfaction of system requirements [14], [21]- [24] [29]. In addition, only very few approaches [33]- [36] include the explanations and reasons for variability.…”

“…The approach [24] does not include the internal system. Nonetheless, it organized the context to introduce concepts related to the variability of BPEL.…”

“…The using case of variation point can capture the organization and interaction information of the system with the environment. The model Sun et al, [29] is similar to the model Koning et al, [24]. It covers all the functional and structural aspects indicating the behavior of the system, the objective and responsibility to organize work.…”

Distributed Execution of S-BPM Business Processes

“…A representative work is described in [6], where the authors introduce the VxBPEL language, which is an extension of BPEL by incorporating variability. It enables rebinding of services during runtime, substitution of service for optimizing purposes or in case of in sudden unavailable services.…”