Research On RIA System Integration Based On Web Services And Flex

In this paper, a Web Services composition model based on model driven architecture is established. Using Petri Nets for its modeling, and using reachability tree nature of Petri Nets validates the model boundedness, accessibility, activity and integrity. This model combines the existing Web Services to meet the high-quality customers' application requirements and it can better meet services call of the EAI. At the same time, aiming at the issue of transmission data security risks, a Web Services security model which can guarantees the security of transmission of SOAP messages in application layer is proposed and it introduces a secure identity authentication and permission authentication mechanism which improves the deficiencies of traditional methods, Thus it pledges the confidentiality, integrality and anti-denial of the transport message in the transport layer and application layer. In all, it enables EAI architecture to be more comprehensive and safe. Finally, through the simulation of the Web Services composition model and Web Services security model on the JEE5 platform, achieves the aim to verify the correctness of the model in practice.