Software Architecture Design Methodology

Abstract

The invention discloses a software framework which is suitable for application software running at a POS (point of sale) terminal. The software framework comprises an API (application programming interface) layer and a business module layer, wherein the API layer is based on a standard C programming language and private APIs corresponding to corresponding OSs (operation systems), and packaged with the APIs which correspond to the OSs suitable for the application software and are required by the businesses contained in the application software; the business module layer comprises business modules, each business module corresponds to one business uniquely, and software codes of each business module are achieved by calling the corresponding APIs in the API layer and the standard C programming language; and the APIs in the API layer and the business modules in the business module layer exist in a dynamic library manner, so that the dynamic loading is realized. Obviously, in the scheme, the business modules have high-cohesion and low-coupling characteristics, therefore, the business modules are mutually independent, and the management flexibility of the application software can be effectively improved.

Description

technical field [0001] The present invention relates to the technical field of POS terminals, in particular to a software architecture applicable to application software running on POS terminals. Background technique [0002] POS (Point of sale) is a terminal reader equipped with barcode or OCR code (Optical character recognition optical character code), at least with cash or barter amount cashier function. Among them, the POS terminal is connected to the settlement system of the advertising barter trading platform, and its main task is to provide data services and management functions for commodity and media transactions, and to perform non-cash settlement. [0003] In the prior art, the management services that can be realized by using POS terminals can include operator management, operator sign-in, operator sign-out, establishment of redemption marks, transaction review, etc.; and the transaction services that can be realized by using POS terminals can include : Consumpt...

AI Technical Summary

Problems solved by technology

[0004] However, the application software that can cover various services in the POS terminal is usually written uniformly in the development environment, so that a set of software codes can compile the entire application covering multiple services, that is, there is a high coupling between various services. Ultimately resulting in less flexible management of application software

For example: when a certain business of the application software changes, even if it is a slight change, it is necessary to download and update the entire application software to the POS terminal, resulting in low download and update efficiency; The modification of the software will cause the software code of other businesses to be modified accordingly to prevent the application software from running normally

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