Delegation proxies: the power of propagation

Scoping behavioral variations to dynamic extents is useful to support non-functional requirements that otherwise result in crosscutting code. Unfortunately, such variations are difficult to achieve with traditional reflection or aspects. We show that with a modification of dynamic proxies, called delegation proxies, it becomes possible to reflectively implement variations that propagate to all objects accessed in the dynamic extent of a message send. We demonstrate our approach with examples of variations scoped to dynamic extents that help simplify code related to safety, reliability, and monitoring. Categories and Subject Descriptors D.3.3 [Software]: Programming Languages — Constructs and Features Keywords Reflection, proxy, dynamic extent

• Type: Journal
• Year: 2014
• Where: AOSD
• Authors: Erwann Wernli, Oscar Nierstrasz, Camille Teruel, Stéphane Ducasse
• Keywords: AOSD 2014, Software Engineering