ObjectDB 2.0.0

Released on 2010-09-26 (see other available releases).

A newer version is available.

Use of ObjectDB is subject to the ObjectDB Licence. 

Changes in ObjectDB 2.0.0

• Improved processing of some sorts of queries.
• Added support for using ObjectDB with JPA 1 jar in the classpath.
• Changed server start avoiding new process creation.
• Added logging for class loading and method finding problems.
• Fixed a bug in the results of IS [NOT] NULL queries.
• Fixed a bug in ObjectDB Doctor.
• Fixed persistence.xml C/S connection property to "javax.persistence.jdbc.user".
• Fixed a bug in the new log based (recording) recovery from failure mechanism.
• Fixed a bug in finding an entity after a failed find followed by persist.
• Fixed a memory leakage in eager load of large object graphs.
• Fixed a synchronization bug in sequence value generation.
• Fixed some issues in query execution.
• Fixed ObjectDB Doctor to activate and rebuild also inactive (new) indexes.
• Improved performance of database insert/update/delete operations.
• Changed default configuration (for improved performance).
• Added support for running a server with no tray icon (using a -console flag).
• Changed EntityManager.find to return null when no object is found.
• Fixed a bug in closing database files.
• Fixed a bug in preserving order of @EmbeddedId fields.
• Fixed a NullPointerException during cache cleanup.
• Fixed a bug in database file converter (from ObjectDB 1.0 to 2.0).
• Fixed a bug in handling duplicate / missing JDO metadata.
• New error message when persisting a reference to a new (non managed) entity object.
• Fixed a bug in lazy loading of instances of non enhanced classes.
• Added Explorer support of ID / version / inverse (mapped by) fields.
• Fixed Explorer bug in closing database files.
• Fixed cascading through inverse (mapped by) fields.
• Fixed some bugs in automatic schema evolution.
• Fixed a Server/Explorer class loading bug (after schema change).
• Fixed a bug in the ObjectDB Doctor Tool.

See the full change log.

ObjectDB with Maven

To use ObjectDB in a Java Maven project add the ObjectDB repositpory and dependency to the pom.xml file.

Use Java 8 or above with the javax variant and Java 17 or above with the jakarta variant.

<repositories>
			...
	<repository>
		<id>objectdb</id>
		<name>ObjectDB Repository</name>
		<url>https://m2.objectdb.com</url>
	</repository>
			...
</repositories>
			...
<dependencies>
			...
	<dependency>
		<groupId>com.objectdb</groupId>
		<artifactId>objectdb</artifactId>
		<version>2.0.0</version>
	</dependency>
			...
</dependencies>

ObjectDB Development Kit

The ObjectDB Development Kit includes:

• The ObjectDB runtime JAR (available also on Maven).
• The GUI ObjectDB Explorer.
• Sample ObjectDB databases that you can open in the Explorer.
• Command line tools for running the ObjectDB Server and the ObjectDB Enhancer.
• A sample objectdb.conf configuration file.
• Source code of the Java / Jakarta Persistence API (JPA).
• JavaDoc of the Java / Jakarta Persistence API (JPA).
• The complete ObjectDB Manual in PDF format.