Metrics for Evaluation of Aspect-Oriented Middleware

We present a set of metrics to assess aspect oriented (AO) middleware aiming at evaluating the benefits of applying the AO paradigm in middleware design. We adopt a strategy based on defining a list of static and dynamic properties which are relevant to a middleware and associating metrics to each property. The adopted strategy allows the developer to analyze relevant middleware features from the results of software metrics. Besides the proposed metrics, this paper also presents CoMETA-Lua, a tool to collect coupling and size metrics in a Lua source code. The set of metrics is applied in two middleware systems implemented in Lua: OiL and AO-OiL.