DocumentCode :
1970667
Title :
Facing Uncertainty in Web Service Compositions
Author :
Alferez, German H. ; Pelechano, Vicente
Author_Institution :
Fac. de Ing. y Tecnol., Univ. de Montemorelos, Montemorelos, Mexico
fYear :
2013
fDate :
June 28 2013-July 3 2013
Firstpage :
219
Lastpage :
226
Abstract :
Web service compositions run in complex computing infrastructures where arising events may affect the quality of the system. However, crucial Web service compositions cannot be stopped to apply changes to deal with problematic events. Therefore, the trend is moving towards context-aware Web service compositions, which use context information as a basis for autonomic changes. Under the closed-world assumption, the context and possible adaptations are fully known at design time. Nevertheless, it is difficult to foresee all the possible situations arising in uncertain contexts. In this paper, we leverage models at runtime to guide the dynamic evolution of context-aware Web service compositions to deal with unexpected events in the open world. In order to manage uncertainty, a model that abstracts the Web service composition, self-evolves to preserve requirements. The evolved model guides changes in the underlying WS-BPEL composition schema. A prototype and an evaluation demonstrate the feasibility of our approach.
Keywords :
Web services; software fault tolerance; specification languages; ubiquitous computing; WS-BPEL composition schema; closed-world assumption; complex computing infrastructures; context information; context-aware Web service composition; dynamic evolution; Adaptation models; Context; Context modeling; Engines; Runtime; Uncertainty; Web services; Uncertainty; Web service compositions; dynamic evolution; models at runtime; open world;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Web Services (ICWS), 2013 IEEE 20th International Conference on
Conference_Location :
Santa Clara, CA
Print_ISBN :
978-0-7695-5025-1
Type :
conf
DOI :
10.1109/ICWS.2013.38
Filename :
6649582
Link To Document :
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