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User-Centric Web Services Composition Approach Based on Swarm Intelligence

Nowadays, composite service has led to a new challenge as there are various kinds of users and an increasing number of similar Web services. This challenge is to pick out the most appropriate composition for user requester. However, a composite service is determined by the quality of the involved Web services and some user preferences. Consequently, the best composition optimizes the QoS (Quality Of Service) while satisfying the constraint related to user preferences without considering the user context attributes. This will produce a non-adaptive composition. The present paper introduces a new Valued Constraint Satisfaction Optimization approach (VCSOP) based on Particle Swarm Optimization (PSO) Meta-heuristic to effectively generate a composition process related not only to the problem constraint but also to the user context necessities.