Developing a Concurrent Service Orchestration Engine Based on Event-Driven Architecture

WS-BPEL (BPEL for short) represents the de-factor standard for the Web set-vices composition. Service Orchestration engines, also named BPEL engines, are in charge Of executing and managing the workflow specified ill BPEL. As a kind of server application, high performance under massive concurrency is necessary to design a scalable BPEL engine, and it is a challenging problem to implement it correct and highly concurrent BPEL engine. We propose all approach based oil event-driven architecture to design BPEL engine and introduce the FSM (finite state machines) to describe the semantics of the BPEL process. We also test our BPEL engine and prove the improvement in capability of handling the massive concurrency comparing to the one based on the thread-based concurrent paradigm.