Mobile adaptive tasks guided by resource contracts

Abstract

This paper proposes a way to realize the idea of calm computing by adding a dynamic task model into the pervasive computing environment. This task model contains information about the actions to undertake to help a user realize his daily tasks. The task model's mapping onto a deployment plan guides an internal adaptation mechanism, which helps applications to evolve without causing user distraction. In addition, a foraging technique (relocation) is proposed that allows for expanding an application's computing space automatically whenever possible. This technique involves external adaptation mechanisms. Both adaptation mechanisms are driven by resource information and resource contracts that are negotiated between the middleware and the application components. This allows the middleware to do the adaptations automatically, realizing the idea of calm computing.

The Adaptive Code Kitchen: Flexible Tools for Dynamic Application Composition

“…In doing so, we seek to maintain the reified structure inherent in an executable's constituent object files even after runtime composition. Furthermore, to support arbitrary code-base expansion and contraction [29], we must be lenient toward undefined references, and provide a default flow of control that may be used to monitor and asynchronously modify the composition.…”

Towards service orientation in pervasive computing systems

“…Of particular interest is enhancing the current work on architectural reflection via the use of "overlay networks" as component frameworks in the system, so that reconfigurability of the core messaging and networking functionality itself can be achieved. For implementing architectural adaptation, we are also investigating the integration of resource contracts idea from [14] with the policy matching idea from [11].…”

Adaptive Context Management Using a Component-Based Approach

“…The base system supports extensions for component distribution [11], live updates [9], contract monitoring and resource management [10] and provides a unique test platform for validating the proposed concepts in a pervasive and ubiquitous computing context. Several information providers, the storage components, and the transformation components are operational.…”

“…Advantages of using components include the possibility of live updating with better suited components [9], negotiating and enforcing resource contracts [10], distributing the execution and relocating component-based applications [11].…”