Este trabalho de mestrado apresenta a modelagem, a prototipação e os resultados do desenvolvimento de um middleware para composição dinâmica de Web Services denominado DWSC-M (Dynamic Web service Composition Middleware). O objetivo principal desse middleware é permitir que serviços sejam compostos dinamicamente considerando aspectos de qualidade de serviço na escolha dos serviços que fazem parte de um fluxo de composição. Para complementar o funcionamento do middleware DWSC-M foram propostos dois algoritmos para seleção de Web Services: o primeiro utiliza seleção aleatória e o segundo utiliza distância Euclidiana para seleção de serviços e considera, para tal finalidade, os parâmetros de QoS enviados pela requisição do cliente do serviço / This work presents the modeling, the prototype and the results of the developing of a middleware for dynamic composition of Web Services named DWSC-M (Dynamic Web Service Composition Middleware). The main focus of this middleware is to allow services being dynamically composed, considering aspects of quality of service in the choice of services that are part of the composite flow. Complementing the operation of the DWSC-M middleware two algorithms were proposed for Web Services selection : the first one uses Random selection and the second one uses Euclidean Distance for the selection of services and considers for this purpose the QoS parameters sent by the client service request

Thesis (M.Sc.)--Memorial University of Newfoundland, 2005. / Bibliography: leaves 91-96.

In the domain of Web Services, it is not uncommon to find redundant services that provide functionalities to the clients. Services with the same functionality can be clustered into a group of redundant services. Respectively, if a service offers different functionalities, it belongs to more than one group. Having various Web Services that are able to handle the client's request suggests the necessity of a mechanism that selects the most appropriate Web Service at a given moment of time. <p>This thesis presents an approach, Virtual Web Services Layer, for dynamic service selection based on virtualization on the server side. It helps managing redundant services in a transparent manner as well as allows adding services to the system at run-time. In addition, the layer assures a level of security since the consumers do not have direct access to the Web Services. <p>Several selection techniques are applied to increase the performance of the system in terms of load-balancing, dependability, or execution time. The results of the experiments show which selection techniques are appropriate when different QoS criteria of the services are known and how the correctness of this information influences on the decision-making process.

This master thesis work was done at Ipendo Systems in Linköping, a company that makes an intellectual property management system called Ipendo Platform. The master thesis describes the design and development of an extension to a web based solution to work as desktop application and demonstrating the solution with an Outlook plugin. The goal was to improve the workflow for the user when handling documents received by mail and also find and evaluate a model for product integration that could be re-used for future projects. The result of the master thesis is an Outlook plugin and a web service that exposes part of Ipendo Platform functionality in a service layer. As a final test the solution was tested in a production environment to simulate real world usage. The report provides conclusions about the pros and cons of this kind solution and how the current design and implementation of Ipendo Platform has affected the outcome.

In the domain of Web Services, it is not uncommon to find redundant services that provide functionalities to the clients. Services with the same functionality can be clustered into a group of redundant services. Respectively, if a service offers different functionalities, it belongs to more than one group. Having various Web Services that are able to handle the client's request suggests the necessity of a mechanism that selects the most appropriate Web Service at a given moment of time. <p>This thesis presents an approach, Virtual Web Services Layer, for dynamic service selection based on virtualization on the server side. It helps managing redundant services in a transparent manner as well as allows adding services to the system at run-time. In addition, the layer assures a level of security since the consumers do not have direct access to the Web Services. <p>Several selection techniques are applied to increase the performance of the system in terms of load-balancing, dependability, or execution time. The results of the experiments show which selection techniques are appropriate when different QoS criteria of the services are known and how the correctness of this information influences on the decision-making process.

Thesis (Ph.D) - [Faculty of Information and Communication Technologies], Swinburne University of Technology, 2009. / Typescript. A thesis submitted to [Faculty of Information and Communication Technologies], Swinburne University of Technology for the degree of Doctor of Philosophy. "March 2009". Bibliography: p. 136-141.

Zugl.: Darmstadt, Techn. Univ., Diss., 2007

Stuttgart, Univ., Diplomarbeit, 2008.

Stuttgart, Univ., Diplomarbeit, 2007.

Thesis (M.S.C.I.T.)--Regis University, Denver, Colo., 2008. / Title from PDF title page (viewed on June 9, 2008). Includes bibliographical references.