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Abstract. Hierarchical software components offer interesting characteristics for the development of complex applications. However, supporting the deployment of such applications is difficult, especially on challenging distributed platforms. This paper addresses the distribution and the deployment of hierarchical components on heterogeneous dynamic networks. Such networks may include fixed and mobile resource-constrained devices and are characterized by the volatility of their hosts and connections, which may lead to their fragmentation. The distribution scheme and the associated mechanisms we propose allow a component to provide its services in an ubiquitous way and to operate in a degraded mode. The deployment of hierarchical components is described: we present an ADL extension for specifying a context-aware deployment and we detail a hierarchicallycontrolled deployment designed for dynamic networks. This deployment is performed in a propagative way and is driven by constraints put on the resources of the target hosts.

Abstract

Abstract. In the component-based software development process, the formalisation of architectural choices makes possible to explicit quality attributes. When dealing with the deployment of such component-based software in dynamic networks, in which disconnections or machine failures can occur, preserving architectural choices becomes difficult to ensure, as current architecture-centric languages and their support mainly focus on steps prior to the deployment one. We present in this paper a family of languages that formalise not only architectural choices but deployment aspects as well, both as constraints. Then, we show how all of these constraints are reified in order to manage the deployment of a component-based software in this context of a dynamic hosting platform. The proposed solution defines an automatic deployment that ensures permanently, at run time, the preservation of architecture and deployment choices, and thus their corresponding quality attributes.