The Design of a new Persistent Object Store for PJama

This paper presents the design of a new store layer for PJama. PJama is a platform that provides orthogonal persistence for Java1. Based on experience with a prototype, PJama0, a new architecture has been devised to permit incremental store management and to allow a number of object management regimes to co-exist in one store. It uses a plug-in model for composing a Java Virtual Machine (JVM) with the persistent store and a descriptor abstraction to limit the impact of changes in JVMs on store management. Its anticipated advantages over the current scheme include flexibility, adaptability, scalability, and maintainability.

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