Dynamic Routing Of Enterprise Service Bus

This paper focuses on dynamic routing of Enterprise service bus.With more and more services being integrated into ESB and business process is changing often, manual preparation of Business Process Execution Language is becoming an extremely complex task.ESB is a service agent for all the services in a Enterprise. So it is urgent demand for ESB being able to compose services auto. When a user gives a requesters can compose services auto to get a service sequence and execute the service sequence to fulfill user's need.In this paper, CPN theory is used to solve ESB services automatic composition. First we create CPN model by interface's match for all the services integrated in the ESB. A place represents a kind of message and a transition represents a service action. Message resource is different from other material resource. When message resource is created, it will not disappear. Once the target message is got, user's need is fulfilled. There are two methods for service auto composition.One is by CPN state space. When the services' CPN model is created, we can get the state space of the model. We can figure out the path between the initial node and target node. The services sequence represented by the path is the result.Other is by CPN monitors. During the simulation of CPN model, we can get all the occurred transitions from initial state to target state by breakpoint monitor and write in file monitor. The services sequence represented by the transition sequence is the result.This paper proposes ESB services dynamic composition technology at the level of business process by CPN theory. This method makes ESB easily deal with frequent change of business process.