| Re: [eclipselink-users] How to create J2SE applications with no persistence.xml files |
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Ben, Hi, Tim is right, you will need a minimal persistence.xml file in your META-INF directory for some of the non-property attributes/elements. 1) The examples that use programmatic run-time properties replace the need for the complex-type element <properties><property/>..</properties> in your persistence.xml. However you will still need to define the following design-time attributes/elements off the root element /persistence - persistence-unit/name - provider - without the provider you may rely on the container to assign the first JPA provider it finds (for example GlassFish will default to TopLink Essentials) - persistence-unit/transaction-type and/or the jta/non-jta-datasource - class - if you are deploying in a non-EE environment - exclude-unlisted-classes if you don't want the container to pick up entities on the classpath=false, if you want the container to ignore any entities not defined with <class>=true If you were using your provider in SE mode and wanted to supply your properties at run-time then you could use one of the following methods http://java.sun.com/javaee/5/docs/api/javax/persistence/EntityManagerFactory.html#createEntityManager(java.util.Map) EntityManager createEntityManager(Map map) http://java.sun.com/javaee/5/docs/api/javax/persistence/Persistence.html#createEntityManagerFactory(java.lang.String,%20java.util.Map) public static javax.persistence.EntityManagerFactory createEntityManagerFactory(java.lang.String persistenceUnitName, java.util.Map properties); 2) As you mentioned, you may want to refer to Doug's jpa.dynamic example which illustrates how to define both the properties and the entities dynamically - it still requires a minimum persistence.xml http://wiki.eclipse.org/EclipseLink/Source http://dev.eclipse.org/svnroot/rt/org.eclipse.persistence/trunk/examples/org.eclipse.persistence.example.jpa.dynamic/ http://dev.eclipse.org/svnroot/rt/org.eclipse.persistence/trunk/examples/org.eclipse.persistence.example.jpa.dynamic/src/META-INF/persistence.xml http://dev.eclipse.org/svnroot/rt/org.eclipse.persistence/trunk/examples/org.eclipse.persistence.example.jpa.dynamic/src/testing/PUWithoutXML.java 3) You can refer to p.343 of Chapter 11 Packaging and Deployment of "Pro EJB 3 Java Persistence API" where it states (for an EE environment)... "When defining a persistence unit in an EJB JAR, the persistence.xml file is not optional." Or refer the the EclipseLink User Guide. http://wiki.eclipse.org/Packaging_and_Deploying_EclipseLink_JPA_Applications_(ELUG)#What_You_May_Need_to_Know_About_Persistence_Unit_Packaging_Options thank you /michael Tim Hollosy wrote: You're going to need a persistence.xml somewhere I think. What do you mean you have a requirement you can't put an xml file in the src/META-INF dir? That's a pretty bizarre requirement... ./tch On Thu, Jan 29, 2009 at 11:26 PM, krisusa123 <krisusa123@xxxxxxxxx> wrote: |