ComposiÃÃo adaptativa de Web services

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Web services have played an important role in the development of distributed applications. In particular, the possibility of composing already implemented web services in order to provide a new functionality is an interesting approach for building distributed systems and business processes, in a way that it diminishes the total time of development and promotes the reusability of services already tested and used. The possibility of dynamically composing web services, at runtime, is also apparent. Dynamic composition allows that changes can be perceived by the system during its execution, without requiring any reset of the systems, what belongs to harm the availability of the system and the possible loss of clients. Current approaches address this point, but they do not adopt established specifications, like WS-BPEL, as they usually propose modifications in the rules of business process specifications by imposing more difficulties to implement the system. This adaptability through a semantics modification in the invocation primitive, whilst it keeps the syntax of WS-BPEL unaffected. Hence, programmers may define dynamic web service compositions without changing the source code. The task of how to implement the adaptation belongs now to the environment, exempting the programmer of this task, becoming the task most easy for the programmer. Finally, the adaptability would appear as a new possibility in the project, keeping all the others characteristics of the composition unchanged

ASSUNTO(S)

web service, adaptabilidade, composiÃÃo de serviÃos, processos de negÃcios ciencia da computacao web service, adaptability, service composition, business process

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