Dynamical Enterprise Application Integration And Technical Realization

Enterprise's information construction has developed for more than 20 years, has experiences three stages of technical application unit, enterprise's information integration and information integration of cross-enterprise. Although the amount of information systems is from zero to more, and function become more and more strong, it hinder flow of enterprise message because lack of unified planning or different systems that exits in a firm due to Enterprise annexation to construct system because of what enterprise annexation. That is the demand for integration of information system in enterprises. In recent years, with forming a whole of economic world and perfect competition of the market, all enterprises of one trade from producing the material to selling products can't win the competition unless jointing together. Following this, the business among enterprises becomes mutual and close, and the information systems needs seamless connection to reduce the cost of information flowing. This is the third stage: information integration of cross- enterprises.Integration of the enterprise information systems is enterprise focal point in information field, and many people put forward a lot of integrated modes from different respects. Enterprise Application Integration is one kind mode, and it is the combination of hardware, software, standard and business procedure which connect two and more systems together seamlessly and run as a whole. In different periods, the content of EAI is different, and now it not only includes integration of application systems and organizations in each level inside enterprises, but also realizes the system integration of cross-enterprises. This paper reviews three stages of enterprise's information and present focuses that integrating information system of cross-enterprise, and enumerate the advantages which used enterprise application integration to realize information integration of cross-enterprise firstly. Then I compared several kinds of similar concepts, and divides EAI into three layers from the logic of understanding: users display layer, function layer, data layer. In this chapter, I will analyze three ways which used to realize function layer, and compare three structures of components, three ways of connection and characters. Through the above analysis, the main purpose is to help enterprises choose the most suitable frame and technology according to actual conditions.Because the market competed hard, the life cycle of products and service is shortened, and the customer has more choices. Enterprises need introduce new products and service rapidly to attract the customer and improve the competitiveness. With the changes of the service and products, enterprise's business will change. To increase no or little business cost, the information systems of enterprises must adapted and increased by oneself, the systematic function can use again. This requires systematic function module take high and cohesive, low coupling, and separatesystematic business logic from application procedure. System can use the concrete function according to the business logic dynamically. Web service frame based on SOA (Service Oriented Architecture) satisfied this kind of demand, and it was the best software frame that use to realize integration of cross-enterprise information systems. This paper introduced the essential feature of web services briefly, and proposed a kind of enterprise application integration based on web services. This platform includes three parts mainly: web service technical standard and norm and application server; various kinds of engines, including transaction management engine, procedure engine, SOAP router and adapter; application integrated ,monitor service, information service console, and so on. Those completed management of procedure, application resource and unified interface mainly. In order to define and adjust the commercial logic and procedure again, the paper introduced the thought of business procedure management, and study those function and module that a business procedure administrative system should have. The system mainly manages modeling procedure, executing procedure, measuring performance, optimizing procedure, and has done more research to model procedure, and analyzed several kinds of modeling languages, select a kind of best modeling language. This paper demonstrates the course of modeling procedure, converting model, and display model through one instance based on this kind of modeling language.This paper mainly discussed how realizes dynamic system integration, and enable information system changing with increasing of demand. The system realizes dynamics from three respects: realizing function, transferring the method and managing procedure. Like a bunch of necklace, function acts as pearl, transferring way acts as line, and business procedure management charges how organizes pearl in certain order.