Hybrid messaging of adaptive workflow engine

To realize the adaptive workflow engine, the messaging system is the backbone. Hybrid architectures were given to adapt different MOMs (message-oriented middleware) protocols. After exploring publish/subscribe and point-to-point messaging models, the server-side components modeling business processes are employed to leverage underlying middleware services, and hybrid ways to integrate JMS with EJB for the reliable and fault-tolerant platforms are fulfilled. Detailed analysis and design with the object model for the five synchronous/asynchronous communication scenarios is presented. The main modules and the deployment diagram are also given to guide future application, which has solved the adaptive problem of the workflow engine radically. It is easily implemented and extensively applied.