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Issue No.04 - July-Aug. (2012 vol.38)
pp: 828-843
Oliver Moser , Vienna University of Technology, Vienna
Florian Rosenberg , IBM T.J. Watson Research Center, Hawthorne
Schahram Dustdar , Vienna University of Technology, Vienna
We propose a domain-specific service selection mechanism and system implementation to address the issue of runtime adaptation of composite services that implement mission-critical business processes. To this end, we leverage quality of service (QoS) as a means to specify rigid dependability requirements. QoS does not include only common attributes such as availability or response time but also attributes specific to certain business domains and processes. Therefore, we combine both domain-agnostic and domain-specific QoS attributes in an adaptive QoS model. For specifying the service selection strategy, we propose a domain-specific language called VieDASSL to specify so-called selectors. This language can be used to specify selector implementations based on the available QoS attributes. Both the QoS model implementation and the selectors can be adapted at runtime to deal with changing business and QoS requirements. Our approach is implemented on top of an existing WS-BPEL engine. We demonstrate its feasibility by implementing a case study from the telecommunication domain.
Service composition, quality of service, monitoring, service selection, domain specific languages
Oliver Moser, Florian Rosenberg, Schahram Dustdar, "Domain-Specific Service Selection for Composite Services", IEEE Transactions on Software Engineering, vol.38, no. 4, pp. 828-843, July-Aug. 2012, doi:10.1109/TSE.2011.43
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