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Managing change in persistent object systems

Sjøberg, Dag I.K.; Atkinson, Malcolm P.; Morrison, Ronald
Chapter; AcceptedVersion; Peer reviewed
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DSjoberg-5.pdf (198.5Kb)
Year
1993
Permanent link
http://urn.nb.no/URN:NBN:no-21569

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  • Institutt for informatikk [3586]
Original version
International Symposium on Object Technologies for Advanced Software. 1993, -
Abstract
Persistent object systems are highly-valued technology because they o er an e ec- tive foundation for building very long-lived persistent application systems (PAS). The technology becomes more e ective as it o ers a more consistently integrated computational context. For it to be feasible to design and construct a PAS it must be possible to in- crementally add program and data to the existing collection. For a PAS to endure it must o er exibility: a capacity to evolve and change. This paper examines the capacity of persistent object systems to accommodate incremental construction and change. Established store based technologies can support incremental construction but methodologies are needed to deploy them e ectively. Evolving data description is one motivation for inheritance but inheritance alone is not enough to support change management. The case for supporting incremental change is very persuasive. The challenge is to provide technologies that will facilitate it and methodologies that will organise it. This paper identi es change absorbers as a means of describing how changes should propagate. It is argued that if we systematically develop an adequate reper- toire of change absorbers then they will facilitate much better quality change man- agement.
 
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