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  1. Proceedings of the 7th workshop on Reflective and adaptive middleware (ARM '08)
  2. MoSCA: seamless execution of mobile composite services
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MoSCA: seamless execution of mobile composite services
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MoSCA: seamless execution of mobile composite services

Content Provider ACM Digital Library
Author Del Prete, Lucia Capra, Licia
Abstract We envisage tomorrow's services to become increasingly pervasive, being deployed within buildings, transport systems, markets, as well as people portable devices. Such services will be, by their own nature, simple and fine grained; as a consequence, service composition will become crucial to deliver rich functionalities that satisfy end users' requests. The higher the dynamic nature of the environment, the higher the chances that services will move out-of-reach before the composition completes, causing the service as a whole to fail. We argue that, in order to enable the successful provision of compound services in mobile environments, the reliability of the composition must be measured and reasoned about. In this paper, we present MoSCA, a middleware that facilitates the rapid development and deployment of reliable composite services. At design-time, a MoSCA Service is uniquely identified within an OWL-S ontology, and described as a composition of further MoSCA Services, which can themselves be composite or basic. At run-time, whenever a (composite) service is invoked, MoSCA selects the providers, among those currently available, that are capable of collectively delivering the (composite) service with the highest reliability. Reliability is estimated by reasoning about providers' historical colocation patterns, that are learned over time. Unforeseen changes to such patterns are being monitored as well, potentially triggering re-bindings during service execution.
Starting Page 5
Ending Page 10
Page Count 6
File Format PDF
ISBN 9781605583679
DOI 10.1145/1462716.1462717
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2008-12-05
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Mobility Service composition Middleware Dynamic adaptation
Content Type Text
Resource Type Article
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