Integration Research And Implementation Based On CORBA And Web Services

Web Services and CORBA distributed object technology are the issues of research and development.Web Services provides users with a friendly, convenient user interface, it also shields heterogeneous of operating systems, network and programming languages, different middleware, supports an open , dynamic interoperability model.But Web services is no longer meet to the large-scale enterprise computing and services. The main problem is that system needs HTTP and Web server as an intermediary. This is bound to create the bottleneck in the Web server, resulting in a slower rate of response. CORBA provides a distributed environment in heterogeneous platforms, which is transparent to the development staff of the procedure in structure. It provides heterogeneous, distributed system with a system integration functions, using object-oriented software components and bus technology. It has great advantages of cross-language, cross-platform, standardized structure, portable, flexible.But CORBA has difficulties in crossing the firewall, because the binary coding cannot unify with the existing Internet standard. More importantly, open nodes may have a different middleware, leading that the systems based on traditional middleware can hardly dynamic interaction through the Internet.Integration of Web and CORBA are mainly two ways , one is the Web Services, clients access to CORBA server, the other integrated way is CORBA clients visit Web Services server. Because integration is applied normally through encapsulating exsiting procedures or developing new procedures to provide services. Therefore, this article mainly discussed first integration technology, Web Services Client access to CORBA Server.Based on the existing CORBA and Web Services integration, We proposed and implemented a new Web Services and CORBA integration program based on SOAP/IIOP protocol conversion technologies. Web pages can be used only to fulfill the access and visit of CORBA object, without any additional requirements to clients. Compared with existing CORBA and Web Services program, SOAP/IIOP program has two advantages:First, it simplifies the application procedures for the development and the services;Second, it improves the response speed of the service request to the Web.Finally SOAP/IIOP gateway is applied to the remote substation monitoring .