Web Service Migration Using the Analytic Hierarchy Process

In this paper, we present a framework for Web service migration in Service-oriented Architecture (SOA). The framework utilizes service migration between devices acting as Web service providers to increase the adaptability of SOA in a mobile environment. It allows an automatic discovery of new providers and their services joining a system and extraction of their context, preferences, and rules for a Web service migration ontology. If the preferences and the rules, which specify requirements of each provider to its hosted services and requirements of the services to be hosted by a provider, do not meet the current status and context of providers or services, the framework initiates a Web service migration. In this case, the ontology is added to a core domain model and reasoned together by Jena reasoners to retrieve a set of alternate migration decisions. These are processed by Analytic Hierarchy Process (AHP) decision-making method to find the best possible Web service migrations which modify the status and context of providers and services to better meet their preferences and rules. By the Web service migration, the framework extends significantly the adaptability of SOA systems and helps to keep a required quality of their services (QoS).