LIBERO: a framework for autonomic management of multiple non-functional concerns

We describe a lightweight prototype framework (LIBERO) designed for experimentation with behavioural skeletons—components implementing a well-known parallelism exploitation pattern and a rule- based autonomic manager taking care of some non-functional feature related to pattern computation. LIBERO supports multiple autonomic managers within the same behavioural skeleton, each taking care of a different non-functional concern. We introduce LIBERO–built on plain Java and JBoss–and discuss how multiple managers may be coordinated to achieve a common goal using a two-phase coordination protocol devel- oped in earlier work. We present experimental results that demonstrate how the prototype may be used to investigate autonomic management of multiple, independent concerns