ObjectStore PSE : Java Glossary


ObjectStore PSE
A persistent object database for Java. The main problem with it is that classes to be persisted must inherit from one of ObjectStore’s base classes. It has a variety of APIs (Application Programming Interfaces) including one in Chapter 8 that follows Java 2 conventions. The ObjectStore Postcompiler oc takes a list of Objectstore classes, the inserts fetch() code in the getXXX routines and dirty() code in putXXX application routines.

ObjectStore supports sessions, transactions and checkpoints. Transactions are marked with beginChange/ endChange and beginRead/ endRead calls Transactions are always in try-finally blocks to make sure they complete. Locking is handled by having many readers but only one writer. Permission to write is managed with the useGlobalWrite property.

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