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    Extending Web Service Architecture with a Quality Component: Web Service Architecture and Quality Component

    Eleyan, AA and Zhao, L (2011) Extending Web Service Architecture with a Quality Component: Web Service Architecture and Quality Component. LAP LAMBERT Academic Publishing. ISBN 3845418133


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    The Web service technology provides standard mechanisms for describing the interface of the services available on the Web, as well as protocols for locating such services and invoking them. Each Web service has an associated Web Services Description Language (WSDL) document which describes how it works and how to invoke it. Such document is registered at a Universal Description, Discovery and Integration (UDDI) registry that provides a discovery service for the WSDL descriptions. The Web services architecture consists of three components: Service Provider, Service Requester and UDDI Registry, and the interactions between them through publish, find, and bind operations. Between finding and binding steps there is another crucial step, which is not fully considered by current approaches. This is the step of selection. The UDDI service registry hosts hundreds of similar Web services, which makes it difficult for the service requesters to choose from them, as the selection is based on the functional properties only. However, many similar services are differentiated by their quality criteria. Therefore, quality criteria are important to be considered in the web service selection. This thesis proposes a quality-based Web service architecture (QWSA) that extends the current Web service architecture with a quality server. The quality server consists of four main components: quality manager, quality matchmaker, quality report analyzer, and quality database. The main purpose of quality server is to assist service requester to select the best available service that fulfils his/her preference by matching between a service requester’s quality requirement and the service providers’ quality specifications. In addition, this thesis reports the development of a quality matchmaking process (QMP) based on the proposed architecture by building a quality service selection system (QSSS). This QSSS has been verified and validated using a case study of Amazon E-commerce service (ECS).

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