I have a JAR file that needs to be deployed in several environments, each with its own database connection settings. Right or wrong, I was asked to make these database connection parameters external to the JAR. I saw examples where persistence.xml can refer to an external hibernate.cfg.xml that contains specific connection parameters. Here is my persistence.xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0"
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 http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="myApp" transaction-type="RESOURCE_LOCAL">
<properties>
<property name="hibernate.ejb.cfgfile" value="./hibernate.cfg.xml" />
</properties>
</persistence-unit>
</persistence>
This external hibernate.ejb.cfg is in the same folder as the JAR file, but the link does not work. Here is the error I get:
DEBUG Ejb3Configuration - Look up for persistence unit: myApp
DEBUG Ejb3Configuration - Detect class: true; detect hbm: true
DEBUG Ejb3Configuration - Detect class: true; detect hbm: true
DEBUG Ejb3Configuration - Creating Factory: myApp
ERROR MyDaoImpl - initEntityManager() exception:
javax.persistence.PersistenceException: [PersistenceUnit: myApp] Unable to configure EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:265)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:125)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:52)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:34)
at com.touchnet.MyApp.server.dao.MyDaoImpl.initEntityManager(MyDaoImpl.java:486)
at com.touchnet.MyApp.server.dao.MyDaoImpl.getEntityManager(MyDaoImpl.java:457)
at com.touchnet.MyApp.server.dao.MyDaoImpl.getTransaction(MyDaoImpl.java:512)
at com.touchnet.MyApp.server.dao.MyDaoImpl.beginTransaction(MyDaoImpl.java:502)
at com.touchnet.MyApp.server.service.MyAppService.loadInputFile(MyAppService.java:346)
at com.touchnet.MyApp.server.commandLine.MyAppLoader.main(MyAppLoader.java:74)
at com.touchnet.MyApp.server.commandLine.MyAppLauncher.main(MyAppLauncher.java:44)
Caused by: org.hibernate.HibernateException: C:/MyApp/lib/hibernate.cfg.xml not found
at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:147)
at org.hibernate.cfg.Configuration.getConfigurationInputStream(Configuration.java:1411)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1433)
at org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:972)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:753)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:191)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:253)
... 10 more
ERROR MyDaoImpl - No EntityManager configured.
DEBUG MyDaoImpl - getTransaction() returns null
ERROR MyDaoImpl - No Transaction configured.
How can I access this external hibernate.cfg.xml from persistence.xml?
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