applying adaptation design patterns
Dynamic adaptation may be used to prevent software downtime while new requirements and responses to environmental conditions are incorporated into the system. Previously, we studied over thirty adaptation-related projects to develop twelve adaptation-oriented design patterns that can be leveraged from one adaptive system to another. This paper presents a case study in which we apply our adaptation patterns in the design of a dynamically adaptive news web server. This pattern-based design separates the functional logic from the adaptive logic, resulting in a system that supports dynamic adaptation and is easier to maintain and analyze. Furthermore, to address assurance concerns, we applied automated formal verification techniques to ensure instantiated pattern models satisfy invariant properties specified in each adaptation pattern.
design patterns adaptive systems autonomic systems