SYSTEM SUPPORT FOR MANAGING INVALID BINDINGS

Context-aware adaptation is a central aspect of pervasive computing applications, enabling them to adaptand perform tasks based on contextual information. One of the aspects of context-aware adaptation isreconfiguration in which bindings are created between application component and remote services in orderto realize new behaviour in response to contextual information. Various research efforts providereconfiguration support and allow the development of adaptive context-aware applications from high-levelspecifications, but don’t consider failure conditions that might arise during execution of such applications,making bindings between application and remote services invalid. To this end, we propose and implementour design approach to reconfiguration to manage invalid bindings. The development and modification ofadaptive context-aware applications is a complex task, and an issue of an invalidity of bindings furthercomplicates development efforts. To reduce the development efforts, our approach provides an applicationtransparentsolution where the issue of the invalidity of bindings is handled by our system, Policy-BasedContextual Reconfiguration and Adaptation (PCRA)1, not by an application developer. In this paper, wepresent and describe our approach to managing invalid bindings and compare it with other approaches tothis problem. We also provide performance evaluation of our approach.