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ObjectDB 2.8 Developer's Guide

ObjectDB Tools: the Explorer, the Enhancer, the Doctor, etc. Describes the ObjectDB configuration

JPA Annotations for Classes

JPA defines three types of persistable classes which are set by the following annotations: Chapter 2 of the ObjectDB manual explains these annotations in detail. Entity and mapped super classes can be further configured by annotations that specify cache preferences and lifecycle event listener

JPA Annotations for Relationships

annotation enables configuring cascade and fetch policy, using the following enum types: Additional

Updating JPA Entity Objects

, ObjectDB can be configured to detect array changes using snapshots as well as when enhanced entity

JPA 2 Annotations

JPA defines dozens of annotations that can be divided into the following groups: Annotations for JPA aware classes: Annotations for fields in JPA persistable classes: Annotations for additional JPA configuration: Annotations for JPA lifecycle event callbacks: Java EE container annotations: Many

Storing JPA Entity Objects

setting the ObjectDB configuration or in a JPA portable way, by specifying the cascade-persist XML

Database Connection using JPA

, but this can be configured. EntityManager An EntityManager instance may represent either a remote

Step 2: Entity Class and Persistence Unit

guests in the database. We also need to configure JPA by setting a META-INF/persistence.xml file

Step 5: Add a JSP Page

(and the last in this tutorial) is setting the Spring XML configuration.


lifecycle listener element in the JDO configuration file. The name of the instance lifecycle listener element in the JDO configuration file. Since: JDO 2.1 String ELEMENT_PERSISTENCE_MANAGER_FACTORY The name of the persistence manager factory element in the JDO configuration file. The name

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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