Designing Persistence Libraries with Intercession Property for a Client-Server Environment

  • Authors:

  • Stéphane Demphlous;Franck Lebastard

  • Affiliations:

  • -;-

  • Venue:
  • Reflection '99 Proceedings of the Second International Conference on Meta-Level Architectures and Reflection
  • Year:
  • 1999

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Abstract

This paper presents an architecture where persistence is added to an object-oriented reflective model in a client-server environment. When the client and the server database management system do not share a common formalism, conversion rules must be set. If the open reflective client has intercession properties and the server does not, for example, when an open reflective language is bound to a relational database management system, we show that the conversion rules may become inadequate when a designer extends the semantics of the client language. An object-oriented reflective system is reified as a metaobject model and intercession is often designed as a metaobject protocol that can be specialized. In this case, we state that the best architecture to bring persistence to a reflective client is to extend the standard metaobject protocol with a fine-grained persistence and conversion protocol. We present such a protocol, and we illustrate it with a binding between Power Classes, an open reflective language, and ObjectDriver, our wrapper to relational databases.