ISSN : 1796-217X
Volume : 2    Issue : 3    Date : September 2007

Model-driven Engineering for Early QoS Validation of Component-based Software Systems
James H. Hill and Aniruddha Gokhale
Page(s): 9-18
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Model-driven engineering (MDE) techniques are increasingly being used to address many of the
development and operational lifecycle concerns of large-scale component-based systems. One
such concern that is growing in importance, but lacking significant research is the validation of
quality-of-service (QoS) properties of component-based systems throughout their development
lifecycle. In the current state of the art, large-scale component-based systems have to wait until
system integration time to perform in-depth QoS testing, which can be too late and detrimental to
project schedules and costs. This paper describes our novel MDE-based solution to address this
challenge. At the core of our solution approach are (1) a set of domainspecific modeling languages
that allow us to mimic component “business logic,” and (2) a generative programming framework
that synthesizes configuration files for system simulation. A particular thrust of this paper is
describing the syntax and semantics of the component behavior modeling language, which are
based on the Input/Output automaton formalism. Our experience shows that our techniques enable
developers of large-scale component-based systems to perform early QoS evaluation from
development time to production time. Moreover, our experience shows we are able to provide an
environment where developers can rapidly test ideas and methodologies largely alleviating the
need to expend effort, money, and time implementing them.

Index Terms
model-driven system engineering, continuous QoS validation, simulation, timed input/output