I am trying to use JPA with eclipselink. It worked fine.
To check the behaviour with JPA with hibernate as persistence provider, I changed the persitence.xml and I am getting the infamous error "No Persistence provider for EntityManager named usinghibernate"
peristence.xml
Code:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" 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_1_0.xsd">
<persistence-unit name="usinghibernate">
<provider>org.hibernate.ejb.HibernatePeristence</provider>
<class>arun.ucerelay.datastructures.XVMUpdateProfile</class>
<class>arun.ucerelay.datastructures.XVMUpdateProfileItem</class>
<!-- Scan for annotated classes and Hibernate mapping XML files -->
<properties>
<property name="hibernate.connection.driver_class" value="oracle.jdbc.driver.OracleDriver"/>
<property name="hibernate.connection.url" value="jdbc:oracle:thin:@localhost:1521:krsna"/>
<property name="hibernate.connection.username" value="scott"/>
<property name="hibernate.connection.password" value="tiger"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.OracleDialect"/>
<property name="hibernate.show_sql" value="true"/>
</properties>
</persistence-unit>
</persistence>
Java program:
Code:
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;
import arun.ucerelay.datastructures.XVMUpdateProfile;
public class UpdateProfileMain {
private static Logger logger = MyLogger.getLogger(UpdateProfileMain.class.getName());
public static void main(String args[]) {
List<XVMUpdateProfile> profiles = new ArrayList<XVMUpdateProfile>();
try {
EntityManagerFactory emf = Persistence.createEntityManagerFactory("usinghibernate");
// First unit of work
EntityManager em = emf.createEntityManager();
EntityTransaction etx = em.getTransaction();
etx.begin();
profiles = em.createQuery("select profile from XVMUpdateProfile profile order by profile.profileId asc").getResultList();
logger.info( profiles.size() + " profiles found by Arun. ");
etx.commit();
em.close();
}catch(Exception ex){
logger.log(Level.WARNING, " Arun Could not load profiles : " + ex.getMessage());
logger.log(Level.WARNING, " Arun Could not load profiles : " + ex.getCause());
}
}
}
Here is what I did to get hibernate jars :
I included 2 dependencies in maven pom.xml :
Code:
...
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>3.5.6-Final</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.5.2</version>
</dependency>
...
In the logs, its clear that it is able to find META-INF/persistence.xml and persistence unit and again it complains that it doesnt find the persistence unit.
Code:
TRACE 2011-02-26 00:50:31,765 [main](PersistenceXmlLoader.java:112) org.hibernate.ejb.packaging.PersistenceXmlLoader - Validate with persistence_2_0.xsd schema on file file:/C:/arun/eclipse/workspace/practicewitheclipselink/target/classes/META-INF/persistence.xml
TRACE 2011-02-26 00:50:31,781 [main](PersistenceXmlLoader.java:117) org.hibernate.ejb.packaging.PersistenceXmlLoader - Found error with persistence_2_0.xsd schema on file file:/C:/arun/eclipse/workspace/practicewitheclipselink/target/classes/META-INF/persistence.xml
TRACE 2011-02-26 00:50:31,781 [main](PersistenceXmlLoader.java:127) org.hibernate.ejb.packaging.PersistenceXmlLoader - Validate with persistence_1_0.xsd schema on file file:/C:/arun/eclipse/workspace/practicewitheclipselink/target/classes/META-INF/persistence.xml
TRACE 2011-02-26 00:50:31,781 [main](PersistenceXmlLoader.java:239) org.hibernate.ejb.packaging.PersistenceXmlLoader - Persistent Unit name from persistence.xml: usinghibernate
TRACE 2011-02-26 00:50:31,781 [main](Ejb3Configuration.java:321) org.hibernate.ejb.Ejb3Configuration - PersistenceMetadata(version=1.0) [
name: usinghibernate
jtaDataSource: null
nonJtaDataSource: null
transactionType: RESOURCE_LOCAL
provider: org.hibernate.ejb.HibernatePeristence
useQuotedIdentifiers: false
classes[
arun.ucerelay.datastructures.XVMUpdateProfile arun.ucerelay.datastructures.XVMUpdateProfileItem ]
packages[
]
mappingFiles[
]
jarFiles[
]
hbmfiles: 0
properties[
hibernate.connection.username: scott
hibernate.connection.password: tiger
hibernate.dialect: org.hibernate.dialect.OracleDialect
hibernate.show_sql: true
hibernate.connection.url: jdbc:oracle:thin:@localhost:1521:krsna
hibernate.connection.driver_class: oracle.jdbc.driver.OracleDriver
]]
Feb 26, 2011 12:50:31 AM UpdateProfileMain main
WARNING: Arun Could not load profiles : No Persistence provider for EntityManager named usinghibernate
Feb 26, 2011 12:50:31 AM UpdateProfileMain main
WARNING: Arun Could not load profiles : null
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