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Defesa de Tese de Doutorado Nº 343: "Cost Management of Service Composition"

O aluno Robson Wagner Albuquerque de Medeiros vai apresentar seu trabalho no dia 7 de março, às 13h, na sala D222 Início: 07/03/2017 às 13:00 Término: 07/03/2017 às 00:00 Local: Sala D222

Pós-Graduação em Ciência da Computação – UFPE
Defesa de Tese de Doutorado Nº  343

Aluno: Robson Wagner Albuquerque de Medeiros
Orientador: Prof. Nelson Souto Rosa
Co-orientador: Prof. Luís Ferreira Pirez (University of Twente)
Título: Cost Management of Service Composition
Data: 07/03/2017
Hora/Local: 13h –  Centro de Informática  - Sala D222
Banca Examinadora:

Prof. Jaelson Freire Brelaz de Castro (UFPE / Centro de Informática)
Prof. Paulo Romero Martins Maciel (UFPE / Centro de Informática)

Prof. Ricardo Massa Ferreira Lima(UFPE / Centro de Informática)
Prof. Nabor das Chagas Mendonça (UNIFOR) / Centro de Ciências Tecnológicas)
Prof. Flávia Maria Santoro  (UNIRIO) / Departamento de Informática Aplicada)


Service-Oriented Architecture (SOA) is software design style based on the notion of Service-Oriented Computing (SOC) that facilitates the interoperability among computer systems of possibly different businesses. Cost is one of the most challenging factors influencing SOA adoption in organisations and a significant factor in SOA project success. Nevertheless, many organisations across the world have adopted SOA to interconnect their computing infrastructures (Business-to-Business) and offer interfaces to their customers (Business-to-Customer). For these companies, SOA can address their needs to access the market more quickly, respond to changes in a business environment, improve business processes, improve customers’ services and even reduce costs.
In SOA, service composition has emerged as an important strategy to enable collaboration of applications provided by different companies (Business-to-Business). With the increasing number of Web services having similar functionality but different pricing schemes, choosing the most appropriate set of services with the lowest cost has been a challenge in service compositions. In the literature, there are several techniques to compute and analyse the cost of service compositions. However, there is still no approach to developing cost management systems able to assist in the planning, definition, scheduling, execution, monitoring and adaptation of compositions taking into account all classes of cost behaviour and all type of cost drivers.
Thus, the principal purpose of this thesis is to provide a framework to develop service composition engines able to manage the cost of service compositions throughout the phases of their life-cycle in an integrated way. Therefore, we provide a metamodel to specify complex cost behaviours. Also, we propose algorithms to compute service costs and select the best services that meet the cost requirements of the service composition according to the cost behaviour of each service. Moreover, we propose an architecture for developing engines able to manage the cost throughout the service composition life-cycle. Finally, we developed a prototype based on the proposed architecture and executed experiments that show the effectiveness and efficiency of our approach to managing the cost of service composition.

Palavras-chave: Service-Oriented Architecture, Service Composition, Cost Management
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