On the Need for On-Demand Remodularization

Several modern approaches to separation of concerns support identification and encapsulation of important concerns that could not traditionally be encapsulated. They generally require that the software be written up front with the appropriate modularization. However, as software evolves, the need arises for new concerns, often of new kinds. This position paper motivates the need for on-demand remodularization: the ability to remodularize according to new concerns, non-invasively, and without eliminating encapsulation based on prior concerns. The paper presents a specific example, intended as the basis of a challenge problem, and outlines a solution using Hyper/JTM .