面向服务架构软件实现前的可靠性评价方法

摘要

A reliability evaluation method was proposed to evaluate the reliability of Service-Oriented Architecture (SOA) before its realization. OWL-S (Ontology Web Language for Services), of which the formal semantics of the control structure was defined by Maude, was used to descript the information of software requirements and design. The operational profile of software was built up by distribution function. After this, how the information of operational profile and the architecture of software took part in reliability calculation was added in Maude. At last, the reliability of software could be achieved through rewriting with the supporting of Maude system. In addition, the Software Reliability Predict Tool ( SRPT) was developed based on this method. The data flow, control flow, components as well as the operational profile and the architecture of software were considered in the impact on software reliability. According to the design of software, it can estimate the reliability before the accomplishment of software.%为了在软件实现前评估其可靠性,针对基于面向服务架构( SOA)设计的软件提出了一种可靠性评价方法:用OWL-S描述软件的需求和设计信息,利用Maude为OWL-S过程模型的控制结构定义形式化语义,使用分布函数构建软件的操作剖面,在Maude中增加软件的操作剖面信息和体系结构信息如何参与可靠度计算的描述,在Maude系统的支持下,通过重写得到软件的可靠度,并基于此方法设计开发了一个软件可靠性预计工具——SRPT.所提出的软件可靠性评价方法综合考虑了数据流、控制流、构件和软件操作剖面信息以及体系结构信息对软件可靠性的影响,能够在软件实现前根据软件设计预测其可靠度,为软件的开发设计提供了工程指导.