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Database Management Settings

- you should only activate ObjectDB on developer machines. Classes that are enhanced by the ObjectDB Enhancer (when using the OEM license) are signed and excluded from evaluation restrictions. Therefore, when ObjectDB runtime is bundled in a product that uses only signed enhanced persistable classes - activation by end users is unnecessary.

ArrayIndexOutOfBoundsException with enhanced Entity

ArrayIndexOutOfBoundsException with enhanced Entity

JPA Entity Fields

3) unless either the entity class is enhanced (explained in chapter 5) or a version field

FROM clause (JPQL / Criteria API)

The FROM clause declares query identification variables that represent iteration over objects in the database. A query identification variable is similar to a variable of a Java enhanced for loop in a program, since both are used for iteration over objects. Range Variables Range variables are query

Step 1: Create a Maven Web Project

> <id>enhance</id> <phase>process-classes</phase> <goals> <goal>java</goal> </goals> <configuration> <mainClass>com.objectdb.Enhancer</mainClass

Step 1: Create a Maven Web Project

>        <id>enhance</id>        <phase>process-classes</phase>        <goals>         <goal>java</goal>        </goals>        <configuration>         <mainClass>com.objectdb.Enhancer

Step 7: Run the Spring Web App

enhancement (weaving) in Tomcat it has to be run with ObjectDB as a Java agent (javaagent:objectdb.jar). When using GlassFish - on the fly enhancement (weaving) is automatically enabled

Step 7: Run the Spring Web App

enhancement (weaving) in Tomcat: Find the Tomcat server in the [Services window] under Servers. Right ... . Right click the server node and select Restart. When using GlassFish - on the fly enhancement (weaving

[ODB1] Chapter 4 - JDO Metadata

. The metadata is used first by the JDO Enhancer, and later by the JDO ... (possibly in a jar file). 4.1 JDO Metadata Files During JDO enhancement and later at runtime

JDO Annotations for Classes

JDO supports two modes of persistable classes that can be set by the following annotations: Non persistable classes that should be enhanced (because of accessing persistent fields of other classes directly) can be marked with: The identity mode of persistence capable classes can be specified by using:

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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