Component-Based Modeling for Information Systems Reengineering

Component-Based Modeling for Information Systems Reengineering

Malleswara Talla (Concordia University, Canada) and Raul Valverde (Concordia University, Canada)
DOI: 10.4018/978-1-4666-4301-7.ch012
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Abstract

An Information System can be envisioned as a set of interdependent components that provide the intended services. The component based modeling serves as a tool for collecting requirements of an Information System in user perspective and business perspective at various stages of software development. The chapter presents a methodology for component based modeling and development of an Information System, starting from the requirements definition phase, arriving at candidate components and creation of final components and their interfaces. The methodology aims at clarifying the intricate details and usage of an Information System via business type models and use-case models. The chapter presents the interaction diagrams in order to describe interactions among objects in systems perspective, and context diagrams for reflecting upon the business domain. Finally, the chapter proposes component replacement as a methodology for system reengineering, and model-view-control framework for component refinement and evolution in order to achieve a reengineered information system that reflects upon current requirements in business domain. The reengineering techniques proposed in this chapter can be applied to legacy systems to turn them into a component-oriented reengineered system.
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Component Based System Modeling

A component is a reusable piece of software that offers a defined service as a part of a system in which it is used. The challenge in component based architecture and design is to reuse as many existing components and designing new ones that are not already available. Component-based modeling includes several activities to start with an objective of defining the requirements of an information system at the technical and user level. The first phase of the component-based modeling methodology is to capture the requirements and preparing an appropriate business type models which serves as a basis for a component architecture by identify component specifications, interfaces and dependencies. The Figure 1 presents a series of activities performed during requirements definition phase of component-based systems development.

Figure 1.

Requirements definition

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