Abstract
The manifestation of miscellaneous aspect-oriented extensions raises the question of how these extensions can be used together to combine their aspectual capabilities or reuse aspect code across extensions. While white-box composition of aspect mechanisms can produce an optimal compound mechanism, as exemplified by the merger of AspectJ and AspectWerkz into AspectJ 5, it comes with a high integration cost. Meanwhile, generic black-box composition can compose arbitrary aspect mechanisms, but may result in a compound mechanism that is suboptimal in comparison to white-box composition. For a particular family of aspect extensions, e.g.,AspectJ-like mechanisms, glass-box composition offers the best of two worlds. Glass-box may rely on the internal structure of, e.g., a pointcut-and-advice mechanism, without requiring a change to the code of the individual mechanisms. In this paper we compare white-, black-, and glass-box composition of aspect mechanisms. We explain subtle composition issues using an example drawn from the domain of secure and dependable computing, deploying a fault-tolerance aspect written in AspectWerkz together with an access-control aspect written in AspectJ. To compare the three composition methods, we integrate a TinyAJ extension with a TinyAW extension, and compare the results of running the aspects in a black-box framework and in a glass-box framework to the result of running these aspects in AspectJ 5.
This work is supported in part by NSF’s Science of Design program under Grants Number CCF-0438971 and CCF-0609612.
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Kojarski, S., Lorenz, D.H. (2006). Comparing White-Box, Black-Box, and Glass-Box Composition of Aspect Mechanisms. In: Morisio, M. (eds) Reuse of Off-the-Shelf Components. ICSR 2006. Lecture Notes in Computer Science, vol 4039. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11763864_18
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DOI: https://doi.org/10.1007/11763864_18
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