软件体系结构驱动的运行环境

Software Architecture-Driven Runtime Environment

由于软件体系结构以隐性的方式存在,结构的问题被传播到平台内,运行时软件体系结构不能在应用层次上被观察和控制,系统难以联机动态演化.在现有的中间件平台之上设计了一个面向应用、开放的、软件体系结构驱动的分布式运行环境SADRE(SoftwareArchitecture-DrivenRuntimeEnvironment),软件体系结构在可运行系统中以一类实体显性地表示,体系结构描述作为核心元素被整个分布式运行环境共享,成为系统调度、通信的依据,从而驱动用户应用的运行.SADRE为灵活的动态体系结构提供了良好的支持,提高了系统的柔性和扩展性.

It is difficult for software online evolution and SA（Software Architecture） is not clearly visible and controllable at the application level at execution time, because runtime SA exists in system implicitly and architectural issues are spread throughout the implementation of OS and middleware layers. A distributed runtime environment SADRE（Software Architecture-Driven Runtime Environment） is designed based on existing middleware to solve these problems, it is application-oriented and open. SA of application system is expressed explicitly as first-class entity in SADRE, architecture description is shared over distributed environment as system gist to schedule and communicate, thereby can drive application＇s execution. SADRE has built-in support for dynamic architectures to adapt distributed applications to unplanned dynamic reconfiguration, so system＇s online evolution can be managed and controlled effectively. Furthermore, SADRE can deal with the heterogeneity among diverse platforms. Finally, system＇s flexibility and expansibility were enhanced.