Towards flexible finite-state-machine-based protocol composition

We propose a novel approach to the composition of group communication protocols. In this approach, components are modelled as finite state machines communicating via signals. We introduce two building blocks, called adaptor and adaplexor, that ease the development and the composition of group communication protocol stacks, and we discuss how isolation can be achieved in this setting. To validate our architectural concepts, we have implemented the proposed group communication architecture in SDL.