Aspect-Based Realization of Non-functional Concerns in Business Processes

While functional concerns are well supported in current business process modeling languages such as the Business Process Modeling Notation (BPMN), many important non-functional concerns such as security and quality of service (QoS) cannot be expressed. Some works proposed specific extensions to business process modeling languages to express certain non-functional concerns. However, most related works focus only on expressing non-functional properties in business process models without considering their realization on the implementation level. In this paper, we present a generic approach to non-functional concerns in business processes and bridge the gap between process modeling and process implementation by generating AO4BPEL aspects that enforce and realize the non-functional properties specified in the business process model. The functional part of the processes is realized by generating executable WS-BPEL code out of BPMN process models. The approach is not specific to a particular non-functional concern and the usage of aspects ensures a modular implementation of the business process.