A Decentralized Framework for Executing Composite Services Based on BPMN

The execution of process-oriented composite services described with BPMN has become a hot research topic. In this paper, we present a decentralized execution engine for BPMN-based composite services, the basic idea of which is to make a BPMN model directly executable without converting to another executable model. An executable BPMN model named BPD is first defined. Second, a set of algorithms are proposed to execute the elements in a BPMN process. Third, we implement a composite service engine based on the proposed approach. Finally, a case study is performed to show its feasibility and effectiveness.