Middleware-based Distributed Systems Development Process

Along with the developing computer technology and the request of enterprise calculating cost, more and more computer application system has applied the distributed computer system. The software system structure also has changed from the traditional C/S pattern to the three-layer C/S structure, which is , increasing an intermediate level between the client and the server. Introducing three-layer C/S structure to construct the distributed application has extremely vital significance. There are three logical layers in the structure: client, service logic and data service. To construct this three-layer structure, the key is to design the service logic, and the essential technology lies in the middleware constructing. Applications based on the distributed middleware technology would has good performance on the reuse and the maintainance of the system.As the old ticket networking dispatch system was based on the traditional C/S structure, the user interface, the method and the data storage in the station service management information system has all been unable to adapt the current demand.In view of this, based on researching on the distributed middleware system performance, this paper proposes the distributional solution to the original booking system, uses the distributed database technology to realize the multi- stands networking booking and dispatching. The main contents are as follows: designing session Beans of the local service proxy and the central service proxy conform to the EJB2.0 standard, realizing the disposal of distributed transaction by the application server to unified the new system and old system through the standard data transfer platform.