Based On SOA Architecture For Enterprise Application Integration ( EAI ) Technologies Research

Enterprises are setting up various information systems to prompt management level and enhance production efficiency. Under the competitive environment of contemporary enterprise, enterprises are faced with enormous market pressure, the former information systems are no longer suited to current business changes, the contradiction between business an IT is more and more prominent: the problem of solitary information island; integrating cross-system, cross-enterprise work flow is needed.SOA is based on called services which are function models that can be reused. By using those interfaces and contract between services to support business processes, and makes arrangement and combination of services easer. SOA starts with enterprise's needs, and links up IT with information systems, to integrate information systems in the form of services. SOA simplifies IT, and optimizes business processes easily. SOA makes enterprise can response to the fast changes of customer and market needed.First, this thesis analyzes the information system's current situation, in order to suit the requirement of market development; enterprise should integrate its subsystems. Second, this thesis analyzes that the traditional integration technologies, these technologies have some inadequacies, so they are not suit to current enterprise's low-cost, efficient integration of informationization requirement. With SOA, its various implemented technologies and standards maturing, implementing enterprise application integration base on SOA is reasonable method. After analyzing SOA, relevant technical and standard, this thesis use material procurement process of Huaxi Group as an example, to study how to use Web Service technology and Business Process Execution Language to realize enterprise application integration: first, we can encapsulate corresponding functional modules of material management system, procurement management systems and inventory management system into components, and then encapsulate these components into web services. Thus, another system or service can invoke this web service, in other words, these different sysytems can communicate whith each other.The technology of Enterprise Application Integration based on SOA has better flexibility, extendibility and high-effective. This integrated technology will become the mainstream technology of information systems integration.