Use eclipselink.composite-unit
to specify if the persistence unit is a composite persistence unit.
Values
Table 5-21 describes this persistence property's values.
Table 5-21 Valid Values for composite-unit
Value | Description |
---|---|
|
Persistence unit is a composite persistence unit. |
|
(Default) Persistence unit is not a composite persistence unit. |
Usage
The property must be specified in persistence.xml
of a composite persistence unit. The composite persistence unit must contain all persistence units found in JAR files specified by the persistence.xml
file.
Note: If this property is passed to the |
Examples
Example 5-11 shows how to use this persistence property extension in the persistence.xml
file.
Example 5-11 Using composite-unit in persistence.xml
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence persistence_1_0.xsd" version="1.0"> <persistence-unit name="compositePu" transaction-type="JTA"> <provider> org.eclipse.persistence.jpa.PersistenceProvider </provider> <jar-file>member1.jar</jar-file> <jar-file>member2.jar</jar-file> <properties> <property name="eclipselink.composite-unit" value="true"/> <property name="eclipselink.target-server" value="WebLogic_10"/> </properties> </persistence-unit> </persistence>
See Also
For more information, see:
"Using Multiple Databases with a Composite Persistence Unit" in Solutions Guide for EclispeLink
"Composite Persistence Units"
http://wiki.eclipse.org/EclipseLink/UserGuide/JPA/Advanced_JPA_Development/Composite_Persistence_Units