Non-redundant web services composition based on a two-phase algorithm
Data & Knowledge Engineering
Anytime QoS optimization over the PlanGraph for web service composition
Proceedings of the 27th Annual ACM Symposium on Applied Computing
A dynamic qos-aware semantic web service composition algorithm
ICSOC'12 Proceedings of the 10th international conference on Service-Oriented Computing
An Optimal and Complete Algorithm for Automatic Web Service Composition
International Journal of Web Services Research
QoS-aware and multi-granularity service composition
Information Systems Frontiers
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With the proliferation of Web services, service engineers demand good automatic service composition algorithms that not only synthesize the correct work plans from thousands of services but also satisfy the quality requirements of the users. Our observation is that conventional approaches suffer from serious limitations in scalability and accuracy when addressing both requirements simultaneously. We have designed and implemented a tool QSynth to use QoS objectives of service requests as the search directives. This approach effectively prunes the search space and significantly improves the accuracy of the search results. Evaluations show that, compared to the state of the art, QSynth achieves superior scalability and accuracy with respect to a large variety of composition scenarios. Our design of QSynth won the performance championship of Web Services Challenge 2009.