基于可达矩阵的软件体系结构演化波及效应分析

构造性和演化性是软件的两个基本特性.软件演化由一系列复杂的变化活动组成.软件演化的复杂性决定了对软件演化的研究首先应从宏观层面入手.软件体系结构SA作为软件的蓝图和支撑骨架,为人们宏观把握软件的整体结构和软件演化提供了一条有效的途径.描述了SA的构件--连接件模型,建立了SA关系矩阵和可达矩阵,凭借矩阵变换与运算对SA演化中的波及效应进行了深入的分析和量化界定;并对演化中的构件删除、增加和修改以及构件的合并与分解等变化活动所引起的各种波及效应给予了阐述;同时,给出了构件在SA中贡献大小相对量的计算方法.为SA演化的管理、控制、利用和评价提供了可靠的依据,并为基于矩阵变换的SA演化的计算机自动处理奠定了基础.

Ripple-Effect Analysis of Software Architecture Evolution Based on Reachability Matrix

Construction and evolution are two basic properties of software. Software evolution consists of a series of complex change activities. Software complexity decides that the research of software evolution should start with the macroscopical level firstly. Software architecture (SA), which acts as a blueprint and a skeleton of software, offers an availability approach with the whole macroscopical software architecture and evolution grasped by people. The component, connector models, which create SA relation matrix and reachability matrix, are described. Depending on matrix shift and calculation, ripple-effect of SA evolution can be analyzed and its quantity can be ascertained, describing every ripple-effect caused by component deletion, addition, modification, division and combination respectively. At the same time, an approach for calculating the relative quantity of component effect is described. All are credible foundation for management, control, usage and evaluation of SA evolution, and are foundation for SA evolution automation calculation based on matrix shift in computer.