A Channel-based Coordination Model for Components Juan Guillen-Scholten a,2 Farhad Arbab a,2 Frank de Boer a,2

In this paper we present a coordination model for component-based software systems based on the notion of mobile channels, and describe its implementation in the Java language. Channels allow anonymous, and point-to-point communication among components, while mobility allows dynamic reconfiguration of channel connections in a system. This model supports dynamic distributed systems where components can be mobile. It provides an efficient way of interaction among components. Fur-thermore, our model provides a clear separation between the computational part and the coordination part of a system, allowing the development and description of the coordination structure of a system to be done in a transparent and exoge-nous way. Our description of the Java implementation of this coordination model demonstrates that it is self-contained enough for developing component-based sys-tems in object-oriented languages. However, if desired, our model can be used as a basis to extend other models that focus on other aspects of components that are less concerned with composition and coordination issues.