Energy aspects: modularizing energy-aware applications

To effectively extend legacy applications with energy-awareness functionality, dedicated modularization mechanisms are required. This paper introduces the GreenDev framework, which integrates energy testing and event-based modularization for this matter. Energy testing facilitates identifying the energy-related interfaces of applications to the energy-awareness functionality, and event-based modularization facilitates modularizing this functionality from the base functionality of the applications. To maintain loose coupling among these, GreenDev offers a dedicated interface definition language, which enables defining the interfaces abstractly from the actual implementation of the applications. The applications are automatically augmented with these interfaces. We illustrate the applicability of GreenDev in implementing an energy-aware mobile emailing app.