NDLI: Facing Uncertainty in Web Service Compositions

Content Provider	IEEE Xplore Digital Library
Author	Alferez, G.H. Pelechano, V.
Copyright Year	2013
Description	Author affiliation: Fac. de Ing. y Tecnol., Univ. de Montemorelos, Montemorelos, Mexico (Alferez, G.H.) \|\| Centro de Investig. en Metodos de Produccion de Software (ProS), Univ. Politec. de Valencia, València, Spain (Pelechano, V.)
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.
Starting Page	219
Ending Page	226
File Size	605360
Page Count	8
File Format	PDF
e-ISBN	9780769550251
DOI	10.1109/ICWS.2013.38
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Context Web services Context modeling Engines Uncertainty Runtime Adaptation models open world Web service compositions models at runtime dynamic evolution
Content Type	Text
Resource Type	Article

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