Michael Schrefl, Gerti Kappel, Peter Lang,
"Modeling collaborative behavior using cooperation contracts"
, in Journal Data & Knowledge Engineering (DKE), Vol. 26, Nummer 2, Elsevier Science B.V. (North-Holland), Seite(n) 191-224, 6-1998, ISSN: 0169-023X
Modeling collaborative behavior using cooperation contracts
Sprache des Titels:
Several objects exhibit collaborative behavior if they act together in answering a message they have received jointly.
Collaborative behavior is defined by cooperation contracts which are established between several object classes and which declare a set of cooperative methods. A cooperative method is invoked by a cooperative message sent to a tuple of instances, one for each object class in the cooperation contract. This extends the traditional message passing paradigm which requires the receiver of a message to be a single object only.
Cooperation contracts offer several benefits for behavior modeling in object-oriented database design. Behavior provided by several object classes in concert needs not be dispersed and can be defined in a single place. Therefore, behavior designs become symmetric, better maintainable and better extensible.
Cooperation contracts can easily be made available as beneficial modeling construct in existing object-oriented database management systems by adding a few classes. This paper presents such an extension based on the commercial
object-oriented database management system GemStone.
Sprache der Kurzfassung:
Journal Data & Knowledge Engineering (DKE)
Elsevier Science B.V. (North-Holland)
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