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Engineering of Complex Computer Systems, IEEE International Conference on (2012)
Paris, France France
July 18, 2012 to July 20, 2012
ISBN: 978-1-4673-2156-3
pp: 361-370
Software-as-a-service multi-tenancy helps service providers to cut cost, improve resource utilization, and reduce service customization and maintenance time as the tenants share the same service instance. However, existing large-scale business applications inherently do not support multi-tenancy. This hinders these applications' vendors from adopting the cloud model. Thus reengineering such applications to support multi-tenancy has become a key requirement. Reengineering such applications to support multi-tenancy is a complex and challenging task as it requires a deep understanding of the given application and almost all system modules need to be revisited. In this paper we introduce SMURF, Supporting Multi-tenancy Using Reengineering Aspects "Re-Aspect" Framework, to help service providers reengineering their legacy applications to support multi-tenancy. SMURF is based on our new re-aspects concept where a given system modification to disable, modify, replace or inject code is encapsulated in a re-aspect. SMURF realizes given system modifications (captured as re-aspects) by automating both change impact analysis and change propagation processes. We analyze the SaaS multi-tenancy pattern, discuss the set of requirements to migrate a single-tenant application to support multi-tenancy, describe SMURF approach, architecture and implementation details, and present our experimental results of SMURF on a set of open source web applications.
Databases, Business, Security, Data models, Servers, Service oriented architecture, Re-Aspects, Cloud Computing, Software-as-a-Service, Multi-tenancy Engineering, Multi-tenancy Reengineering

M. Almorsy, J. Grundy and A. S. Ibrahim, "SMURF: Supporting Multi-tenancy Using Re-aspects Framework," 2012 17th International Conference on Engineering of Complex Computer Systems (ICECCS), Paris, 2012, pp. 361-370.
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