关键词: 过程，动态更新，BPEL, AOP

Abstract: As the Internet platform is opening and changing, the business processes need to be dynamic updated when running, at the same time, the instances under the original model must be migrated to the updated process model. This thesis designs a process system to support dynamic updating. In model level, AOP(Aspect Oriented Programming) is used to construct the new model when instances arc running. In engine levcl,modifying the existing engine so that running instances can be suspended and resumed, thus supporting the dynamic migration of instances. In instance level, an instance migration algorithm is put forwards to support model dynamic updating. At last, an example is used to verify the correctness of our system.

Key words: Process,Dynamic update,BPEL,AOP