Seven habits of a highly effective smell detector
Proceedings of the 2008 international workshop on Recommendation systems for software engineering
The Selex design pattern: decomposing state machines cluttered by message multiplexing
Proceedings of the 14th Conference on Pattern Languages of Programs
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We report on our experience of applying collaboration-based protocol design in combination with software refactoring as enabling technologies for re-engineering legacy protocol implementations. We have re-engineered a subsystem of a large enterprise communications product. The subsystem implements a standards-based communication protocol with numerous proprietary extensions. Due to many enhancements which the code has undergone, it showed clear signs of design degradation. The business purpose of the re-engineering project was to improve intelligibility and changeability of the code without changing or breaking existing functionality and without imposing a significant performance penalty. We used the re-engineering effort as experimental context for evaluating the enabling technologies. This article reports on our findings and discusses why collaboration-based protocol design in combination with software refactoring worked well in achieving success with our re-engineering effort.