Un environnement de spécification et de découverte pour la réutilisation des composants logiciels dans le développement des logiciels distribués

Components are developed as important and big autonomous and customizable software units. The successfulness of the reuse is important and depend on first the efficiency of the search procedure, second in the success of integration of the discovered component in system engineering. In order to find components that best meet their functionalities and QoS requirements, the discovery process need to know both the QoS information for the components and the reliability of this information. The problem, however is that the current approaches lack both a well-defined semantics to of diverse components and the used discovery processes are inherently restricted to the exact querying. Those problems may provide an incomplete answer and may lead to low precision and recall. When we integrate the discovered component, two things should be considered. one is which solution will be integrated if we have many solutions for the same discovered component. second how resole the collision problem in the matching of different data types. We propose a discovery ontology to describe functional and non-functional properties of software components and an integration ontology to describe its internal structure. We propose also an enhanced Search Engine for Component based software engineering(SEC++), a persistent component that acts as an intelligent search engine, which is based on the subsumption mechanism and a function that calculates the semantic distance between the query and the components descriptions. We also describe how user-specified preferences for components in terms of non-functional requirements (e.g., QoS) can be incorporated into the component discovery mechanism to generate a partially ordered list of services that meet developer-specified functional requirements. When integrating the discovered component, our search engine SEC++ interrogates the integration ontology to choose the component solving method which adapts with the current environment. We also develop a convertor component for conversion between two different types to solve the type collision problem. We propose a shared ontology-supported components composition, which provides a novel solution if no individual component is te l-0 06 27 23 2, v er si on 1 28 S ep 2 01 1