Research And Application On Dynamic Selection Mechanism Of Services

As a new application technology, Web Services has obtained a rapid development in recent years. It is an open technology architecture based on XML and proposed to solve the integration of the application layer. It has the characteristic of simple, flexible and expandable in the integrated aspect, which enables the integrated plan based on web services to become the mainstream in integrated domain.Under the basis of Web Services architecture and its technology, the article proposed an extensible enterprise application integration architecture which supports the services selection from the third party. In order to realize the auto-selection from the services provided by the third parties who have the same functional requirements, we must consider the non-functionality attributes of services and involve the parameter of QoS (Quality of Service) as the characteristic which third party services must have.This article emphasizes on the QoS measure method of third party services. Under the background of enterprises, we have established the suitable QoS model and proposed the QoS computation model and the optimized choice algorithm based on this model, which realizes the service selection from the third party. Simultaneously , we expand WSDL and the UDDI standard to support QoS, design the Web services selector which integrates the selection result with enterprise original service and shows an auto-selection prototype of QoS manager.