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context-oriented behavioral programming

INFORMATION AND SOFTWARE TECHNOLOGY 2021年 133卷

作者： Elyasaf, Achiya Ben Gurion Univ Negev Dept Software & Informat Syst Engn Beer Sheva Israel

context: Modern systems require programmers to develop code that dynamically adapts to different contexts, leading to the evolution of new context-oriented programming languages. These languages introduce new software-engineering challenges, such as: how to maintain the separation of concerns of the codebase? how to model the changing behaviors? how to verify the system behavior? and more. Objective: This paper introduces context-oriented behavioral programming (COBP) - a novel paradigm for developing context-aware systems, centered on natural and incremental specification of context-dependent behaviors. As the name suggests, we combine behavioral-programming (BP) - a scenario-based modeling paradigm - with context idioms that explicitly specify when scenarios are relevant and what information they need. The core idea is to connect the behavioral model with a data model that represents the context, allowing an intuitive connection between the models via update and select queries. Combining behavioral-programming with context-oriented programming brings the best of the two worlds, solving issues that arise when using each of the approaches in separation. Methods: We begin with providing abstract semantics for COBP and two implementations for the semantics, laying the foundations for applying reasoning algorithms to context-aware behavioral programs. Next, we exemplify the semantics with formal specifications of systems, including a variant of Conway's Game of Life. Then, we provide two case studies of real-life context-aware systems (one in robotics and another in IoT) that were developed using this tool. Throughout the examples and case studies, we provide design patterns and a methodology for coping with the above challenges. Results: The case studies show that the proposed approach is applicable for developing real-life systems, and presents measurable advantages over the alternatives - behavioral programming alone and context-oriented programming alone. Conclusio

关键词： behavioral programming Scenario-based programming programming paradigm context awareness context-oriented programming context-oriented behavioral programming

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