Standalone JPA example

[subir rastogi]

Hi,
I am trying to create a simple JPA example using Java SE 5, Hibernate and MySQL.
I have created a persistence.xml and entity classes but when I run the example, I got the error-

 javax.persistence.PersistenceException: No Persistence provider for EntityManager named titan   

Persistence.xml

 
<?xml version="1.0" encoding="UTF-8"?>
<persistence>
	<persistence-unit name="titan">
		<properties>
			<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"></property>
			<property name="hibernate.connection.username" value="username"></property>
			<property name="hibernate.connection.password" value="password"></property>
			<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/jpa"></property>
			<property name="hibernate.hbm2ddl.auto" value="create-drop"></property>
			<property name="hibernate.cache.provider_class" value="org.hibernate.cache.HashtableCacheProvider"></property>
		</properties>
	</persistence-unit>
</persistence>

Please let me know what is wrong with persistence.xml.

Thanks.

[Christophe Verré]

Did you put the persistence.xml file in your META-INF directory ? Is this directory in your CLASSPATH ?

[subir rastogi]

Yes, persistence.xml is in the classpath.

[Christophe Verré]

is META-INF in the classpath ?

[Jaikiran Pai]

I haven't played with standalone JPA much, but shouldn't that persistence.xml have an persistence-provider element which points to the Hibernate persistence provider class? Also posting the entire exception stacktrace might also help.

[Lester Burnham]

Jaikiran Pai wrote:I haven't played with standalone JPA much, but shouldn't that persistence.xml have an persistence-provider element which points to the Hibernate persistence provider class?

Indeed, but if memory serves it's called "<provider>", not "persistence-provider" (unless things have changed since JPA 1.0). You'll also need "<class>" elements for all the classes that should be managed by JPA.

[Jaikiran Pai]

Lester Burnham wrote:
but if memory serves it's called "<provider>", not "persistence-provider"

Indeed (even in JPA2).

[subir rastogi]

If I have to add provider class, in case of hibernate, how to find which is the jpa provider class?

thanks

[Lester Burnham]

The Hibernate documentation.