Abstract
In order to guarantee certain levels of QoS, a Web application needs to adapt itself to different execution contexts. However, because of the lack of coordination support in Web platforms, service providers respond to the challenge by simply providing multiple versions of a Web application, one for each context. We argue this top-down approach is neither efficient nor scalable: developing a context-specific application requires considerable effort and expertise while the ever-changing Internet never stops generating interesting contexts which can be exploited for better deployment. As an alternative, we propose a three-layer, bottom-up approach to building context-aware Web applications. At the bottom layer, we characterize a context-specific Web application with a particular component distribution plan which provides details for composing individual objects. In the middle layer, recursively defined configurations provide a bridge which relates high-level context features to low-level component distribution properties, where a configuration is a combination of configurations and/or component distribution properties. At the top level, a context management system selects desirable configurations according to the execution contexts.
Keywords
- Context Variable
- Context Feature
- Adaptation Policy
- Component Distribution
- Partial Plan
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Chang, PH., Agha, G. (2007). Towards Context-Aware Web Applications. In: Indulska, J., Raymond, K. (eds) Distributed Applications and Interoperable Systems. DAIS 2007. Lecture Notes in Computer Science, vol 4531. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-72883-2_18
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DOI: https://doi.org/10.1007/978-3-540-72883-2_18
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