Hi everyone,

I'm doing exactly the way EntiyManager Docummentaion recommends to create an EntityManagerFactory:

EntityManagerFactory emf = Persistence.createEntityManagerFactory("manager");

But I receive the exception:

java.lang.ClassCastException: org.hibernate.ejb.HibernatePersistence

Does anyone know what's wrong?

Thanks, Guilherme

HibernatePeristence cla is in hibernate-entitymanager.jar - you havto include this jar in classpath

Yes, it is in my classpath!
If you unzip hibernate-entitymanager.jar, you'll see that it isn't any EntityManagerFactory, EntityManager and Persistence class. They're in ejb3-persistence.jar.
These are the jars in my classpath:
ejb3-persistence.jar;
hibernate3.jar;
hibernate-entitymanager.jar;
hibernate-annotations.jar.

Do I have to include other jar? Or do I have to exclude any of these?

when I use HibernatePersistence, that comes in hibernate-entitymanager.jar:

HibernatePersistence persistence = new HibernatePersistence();
EntityManagerFactory hemf = persistence.createEntityManagerFactory("sistemabancario", new HashMap());
EntityManager em = hemf.createEntityManager();

I get the exception

javax.persistence.PersistenceException: org.hibernate.HibernateException: Could not instantiate dialect class

I think it's not a Driver problem. I've already tested this driver before and didn't get any error.

My persistence.xml is:
<entity-manager>
<name>sistemabancario</name>
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>sistemaBancario.servidor.persistencia.vo.BancarioVo</class>
<class>sistemaBancario.servidor.persistencia.vo.PessoaFisicaVo</class>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.connection.driver_class" value="org.gjt.mm.mysql.Driver"/>
<property name="hibernate.connection.username" value="root"/>
<property name="hibernate.connection.password" value=""/>
<property name="hibernate.connection.url" value="jdbc:mysql://localhost/sistemabancario"/>

<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
</properties>
</entity-manager>

Any idea??

this mean that driver's jar isn't in path or is incorrect

But it is my path:

mysql-connector-java-3.0.8-stable-bin.jar

and I've tested it in a JDBC connection and it worked.

what is your tool - command line, ant , eclipse ?

check classpath double - hibernate do same thing like jdbc and instatiate driver same
If you use eclipse (special eclipse rcp) it is another problem - search forum for buddy classloader

I am using jboss eclipse ide version 3.1.0.

try search buddy classloader in this forum and JarVisitor - I think that there are problems with eclipse and jar reading - I haven't tried last hibernate with rcp (or eclipse ide, hibernate tools yet , but I will soon

Ok,thanks

shouldn't I have a hibernate-service.xml in JBoss in order to configure my dialect class? I do not have it.

One thing I do not understand is why JBoss shows these messages:

09:50:34,019 INFO [SettingsFactory] RDBMS: HSQL Database Engine, version: 1.8.0
09:50:34,081 INFO [SettingsFactory] JDBC driver: HSQL Database Engine Driver, version: 1.8.0

in console when I execute the line code:

EntityManagerFactory hemf = persistence.createEntityManagerFactory("sistemabancario", new HashMap());

But I am not trying to access HSQL. I am trying to access MySQL. Do you know where in JBoss I have to configure this RDBMS to MySQL, if it is necessary?

Thanks, Guilherme