Orchestration Evolution Following Dataflow Concepts: Introducing Unanticipated Loops inside a Legacy Workflow

Web Services Oriented Architecture (WSOA) supports development of high quality applications based on a control--flow between services. The introduction of a loop to deal with a dataset inside an orchestration is a typical evolution use case inside a WSOA, but there is no tool support to perform such refactoring operation. In this paper we propose a new method to refactor an orchestration dealing with a variable v so that it iterates over a dataset v* automatically. This algorithm is then validated on a running software used as a validation platform by the French research project called FAROS.