Java Glossary : ObjectStore PSE

Java definitions: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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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 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. S Transactions are marked with BeginChange/EndChange and BeginRead/EndRead. 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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