Resumo

VARGAS-SOLAR, Genoveva et al. Reliable Web Services Composition: An MDD Approach. Polibits [online]. 2014, n.49, pp.17-28. ISSN 1870-9044.

This paper presents an approach for modeling and associating Policies to services' based applications. It proposes to extend the SOD-M model driven method with (i) the n-SCM, a Policy services' composition meta-model for representing non-functional constraints associated to services' based applications; (ii) the n-PEWS meta-model providing guidelines for expressing the composition and the policies; and, (iii) model to model and model to text transformation rules for semi-automatizing the implementation of reliable services' compositions. As will be shown within our environment implementing these meta models and rules, one may represent both systems' cross-cutting aspects (e.g., exception handling for describing what to do when a service is not available, recovery, persistence aspects) and constraints associated to services, that must be respected for using them (e.g., the fact that a service requires an authentication protocol for executing a method).

Palavras-chave : Methodology; nSOD-M; sevice composition; policy.