Architecture Patterns for a Context - Processing Middleware Framework

operation requires some continual adaptations based on the observation of this context. The design and implementation of these observation policies is thus the cornerstone of any ubiquitous application. COSMOS (Context Entities Composition and Sharing) is a component-based framework for managing context information in ubiquitous context-aware applications. It supports the design and development of such applications, which react to changes in their execution environment. Examples of such context changes are the appearance or disappearance of hardware or software resources, and modifications in user preferences. Because the context information that such applications require is very diverse, COSMOS relies on component-based software engineering principles to ensure the integration of context information. In particular, the framework combines the concepts of software components and architectural design patterns to define its architecture’s foundations. Software components efficiently encapsulate the context information diversity, and architectural design patterns outline the context management policies.