| With economic globalization and the rapid development of e-commerce, enterprise business integration will be faced with distributed, heterogeneous, dynamic application environment; the traditional workflow technology also will be increasingly unable to meet the needs of modern enterprise business integration. The pattern of service-oriented computing is gaining popularity, web service technology is mature, and BPEL has become the industry-standard in the field of web services composition. BPEL-oriented workflow will be the important development direction of workflow technology; however, it is difficult to invocate web services dynamically for BPEL-oriented workflow. In the research, the agent-based method is focused on, it makes BPEL-oriented workflow can invocate web services dynamically.Firstly, the basic theory of workflow based BPEL is introduced, workflow, SOA and other theory are analyzed, and their characteristics are summarized.Secondly, on the basis of the SOA model, the extended SOA model is built through the introduction of services agent. The agent-based method to invocate web service dynamically for BPEL process is brought forward, the function of service agent is described, the structure is designed in detail and the formula to realize the service agent is proposed.Moreover, the workflow model based BPEL is analyzed, the architecture of BPEL-based workflow management is designed by consulted with the service agent, every part of the system is introduced and the realization to some key parts are described, for example, the realization to BPEL process designer is described in detail.Finally, the BPEL process is described through an example, and where can invoke web services dynamically is analyzed, thus the importance of workflow based BPEL in the enterprise business integration is manifested. |
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