RESTful Web service composition with BPEL for REST

Publication Type  Journal Article
Year of Publication  2009
Authors  Pautasso, C.
Journal Title  Data and Knowledge Engineering
Volume  68
Issue  9
Pages  851-866
Key Words  Web Service Composition; RESTful Web Service; BPEL Extension; REST
Abstract  Current Web service technology is evolving towards a simpler approach to define Web service APIs that challenges the assumptions made by existing languages for Web service composition. RESTful Web services introduce a new kind of abstraction, the resource, which does not fit well with the message-oriented paradigm of the Web service description language (WSDL). RESTful Web services are thus hard to compose using the Business Process Execution Language (WS-BPEL), due to its tight coupling to WSDL. The goal of the BPEL for REST extensions presented in this paper is twofold. First, we aim to enable the composition of both RESTful Web services and traditional Web services from within the same process-oriented service composition language. Second, we show how to publish a BPEL process as a RESTful Web service, by exposing selected parts of its execution state using the REST interaction primitives. We include a detailed example on how BPEL for REST can be applied to orchestrate a RESTful e-Commerce scenario and discuss how the proposed extensions affect the architecture of a process execution engine.
URL  Click Here
DOI  doi:10.1016/j.datak.2009.02.016
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JDKE09-BPELforREST-Pautasso.pdf1.56 MB