Research And Design Of Enterprise Application Integration Based On SOA

SOA (Service-Oriented Architecture) is one of the most popular topics in computer industry and research today. Based on features of standard,flexible,loosely coupled, SOA will completely change the existing enterprise IT framework. After several decades of enterprise information construction, most companies have a heterogeneous environment of disparate systems which lead to many "information isolated islands". With the expanding of business scale, integration is becoming the utmost needs of today's enterprises.Traditional Enterprise Application Integration (EAI) technology can not adapt to the rapid increase in the Enterprise Information Systems (EIS), and the appearance and development of SOA offers new architectural model for Enterprise Application Integration. To implement EAI by using SOA will resolve all sorts of shortage in EAI technology, such as point-to-point integration. It is complex, high costs, and difficult to preserve and closely coupled with specific manufacturers of EAI middleware integration methods.At first,the conception of EAI,including the history,the integration layer structure are described. Then the functions of modern integration technology in EAI, including middleware, SOA, Service Component Architecture (SCA),Web Services , Business Process Execution Language (BPEL) and Enterprise Service Bus (ESB), and the relationships among them are described as well. Based on the facts we've introduced and improvement of the research of the latest achievements on SOA-based EAI, an integration model based on SOA is presented, and implementation of this model is described in detail. Finally, a demonstration project to test the feasibility of application integration framework is described.The EAI framework this thesis described has loose coupling, simple, exoteric characteristic etc, and it can solve problems of expansibility, complexity and compatibility in traditional EAI. With the constant development of SOA, and its application in EAI will bring revolutionary change for enterprises information systems and exert a far-reaching influence on enterprises development.