Aspect-Oriented Programming using JAsCo

Abstract. In this paper, the JAsCo aspect-oriented programming lan-guage is introduced. JAsCo is tailored for component-based software development and introduces two new concepts: aspect beans and con-nectors. An aspect bean is highly reusable because it allows describing crosscutting concerns independently of concrete component types and APIs. A connector on the other hand, deploys one or more aspect beans within a concrete component context and allows specifying an explicit combination of their aspectual behavior. The JAsCo technology intro-duces a genuine run-time weaver that flexibly weaves, reweaves and un-weaves aspects at run-time. By comparing the run-time performance of this weaver with other state-of-the-art dynamic AOP approaches, it is shown how JAsCo is able to significantly outperform most of these ap-proaches.