Study And Application Of Foreign Currency Credit Card POS Trade System Based On Unix IPC Interprocess Communication

Foreign currency credit card POS (Point Of Sells) trade system is one of the most important paths of foreign currency credit card consuming or trade processing system in our frontier country, but it is until now, the environment of foreign currency credit card trade processing is still placed in the entry-level development in our country. Along with the coming of our country RenMinBi bank card business complete opening, and the coming of Peking Olympic Games in 2008 and SHANGHAI world's fair in 2010, these certanly will put forward the higher and more urgent request to our country that improves the foreign currency credit card to accepte the environment.Therefore, development, construction, usage and support the foreign currency credit card Point Of Sells trade processing system will be one of the important missions that is improvement our country foreign currency credit card trade environment.This paper that combines the successful case developing the foreign currency credit card POS (Point Of Sells) trade system introduces the foreign currency credit card POS (Point Of Sells) trade system that includes the whole structure of system, the software system structure of system, the interprocess communication design of system, the function mold design of system, the business layer design of system etc. The paper researches and applies the related technique of the realization of the foreign currency credit card the POS (Point Of Sells) trade system, and gives the implement and deploying of the system at last. This paper includes the main doing work, and the deep technique, and the creative work as follows:1. Safe and dependable design mode: the system development bases on platform of UNIX, the software system is used layering structure. the communication, data interfacec, the center data processing, the business logic processing is completed independently by different layer and different mold, so that it reduces side effect for the relations between the sub- systems or molds. The system design is used the each other backup design mode, when the communication appears the abnormality betewn the trade system of a certain district center and the foreign currency credit card organization, the system will switch automatically to the trade system of other district centers immediately, and ensure the system normal movement.2. IPC Interprocess Communication of the system: IPC is a new Interprocess communication mechanism that provided by the UNIX system V, it strengthens the communication function between the Interprocess consumedly. IPC mechanism includes three kinds of forms that are message queue, signal semaphore and share memory. The Interprocess communication of the foreign currency credit card POS (Point Of Sells) trade system mostly base on the IPC communication. it improve the communication ability and efficiencies of the system consumedly.3. The efficient Interprocess pond mode design: According to the characteristics of the credit card trade system, as well as the system exists a great deal of data that was requested in the production line, the system reduce the resources for establishing or destroying processes by building up the process buffer pond, and raise efficiency of the system.4. The API encapsulation of the network communication: Basing on the system structure design, the communication layer, application the layer and the business layers were divided for carrying out the layer of the software system structure. The socket API was...