Rearch For The Integration Of Heterogeneous Distributed Object Technology Based On J2EE

With the rapid development of electronic commerce and enterprise information, Enterprise accumulates various heterogeneous information systems. In order to adapt to the economic globalization, Enterprises not only need to integrate internal legacy systems, but also need to build a unified platform to offer services distributed. This is conducive to the exchange of information between enterprises and the business. Heterogeneous information systems may rely on different languages, different platforms and multiple distributed components. Therefore, the enterprise needs will the legacy heterogeneous system for effective integration and provide service,CORBA and EJB technology has been widely applied in the current context.CORBA technology, cross-platform and cross-language features is a major one of the solutions that is used to solve the integration of legacy systems. The high coupling between CORBA and firewall limit capacity to provide services to the Internet. The integration of Web Services and CORBA can be realized to Internet service extension of CORBA. So it is a current research focus. As the same time The Enterprise JavaBeans technology that is provided with cross-platform and smooth features promptes EJB technology and CORBA technology coexistence situation. So the CORBA technology and EJB technology interoperability is current enterprise faces a major problem. This paper mainly to the above problems in study and analysis, the research content as follows.1. EJB and CORBA in the analysis based on the technical architecture, The paper studies the feasibility of EJB and CORBA technology, and proposes the two way integration schema that based on RM-IIOP and CORBA Bridge, and achieve the interoperability of EJB and CORBA. It also provides a feasible method for communication between the heterogereous system, Finally, CORBA Bridge-performance testing and analysis.2. Analyzing the architecture of Web Services, The paper implements the data type conversion between CORBA and Web Services, and designs the SOAP/IIOP switcher. It implements the IDL2WSDL algorithm and the convertion between HOP and SOAP, Finaly, SOAP/IIOP Swither performaces the testing and analyzing.3. Analysing EJB components migration model, and achieving a dynamic migration for EJB component. Focus on studing the migration process about stateful session bean and statless session bean, giving the EJB components migration algorithm.