This paper proposes a self-healing approach to handle exceptions in service-based processes and to repair the faulty activities with a model-based approach. In particular, a set of repair actions is defined in the process model, and repairability of the process is assessed by analyzing the process structure and the available repair actions. During execution, when an exception arises, repair plans are generated by taking into account constraints posed by the process structure, dependencies among data, and available repair actions. The paper also describes the main features of the prototype developed to validate the proposed repair approach for composed Web services; the self-healing architecture for repair handling and the experimental results are illustrated

One of the key aspects in the implementation

Abstract. This paper describes an approach for reasoning about the repairability of workflows at design time. We propose a heuristic-based analysis of a workflow that aims at evaluating its definition, considering different design aspects and characteristics that affect its repairability (called repairability factors), in order to determine if the workflow schema supports repairable executions of its activities through the application of repair actions. The analysis intents to identify and evaluate the impact of critical design flaws affecting the repairability of workflows. The results of this analysis are fed back to the workflow designer and used to improve the repairability of the workflow by making appropriate changes to its definition.