Authors
Luca Cavallaro, Matteo Miraz, Giuseppe Serazzi
Description
The Service-oriented Architecture (SOA) paradigm foresees the creation of business applications from independently developed services. In this vision, providers offer similar competing services corresponding to a functional description of a service; these offerings can differ significantly in some Quality of Service (QoS) attributes like performance [1]. On the other side, prospective users of services dynamically choose the best offerings for their purposes. Using the SOA paradigm to build applications, services can be dynamically selected and integrated at runtime, so enabling system properties like flexibility, adaptiveness, and reusability.
In this context, the key point is to build applications through the composition of available services. The application can be specified as a process in Business Process Execution Language (BPEL) language in which the composed Web Services (WSs) are specified at an abstract level …
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