Ensuring Consistent Termination of Composite Web Services

To reach a consistent termination state even in the presence of failures, composite web services require transactional support. Most current work on web services transactions is based on compensation. However, unlike in the traditional intra-organizational applications, the compensation is typically associated with temporal constraints in the context of web services. Such temporal constraints have been largely overlooked by the current research. In this paper, we propose a framework to ensure consistent termination of composite web services with temporal constraints. Given the process of a composite service and the temporal constraints of its component services, our framework not only assists the selection of services based on consistent termination requirements but also ensures the composite service can always terminate in a consistent state even in the presence of failures.