I'm stumped with a Hibernate/JPA configuration issue that's preventing my JPA-annotated entities from being automatically registered:
java.lang.IllegalArgumentException: Unknown entity: com.example.crm.server.model.Language
at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:671)
at com.example.crm.server.model.Language.persist(Language.java:64)
at com.example.crm.server.LanguageTest.testPersistAndRemove(LanguageTest.java:32)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
In my entity class I have:
@Entity
@Table(name="Languages")
public class Language implements Serializable
{
@Id
private Long id;
private String name;
// etc...
}
And in MySQL, the Languages table looks like:
+-------------+----------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------+----------+------+-----+---------+-------+
| Language_ID | int(11) | NO | PRI | NULL | |
| Name | char(18) | YES | | NULL | |
+-------------+----------+------+-----+---------+-------+
2 rows in set (0.00 sec)
And my persistence.xml looks like:
<?xml version="1.0" encoding="UTF-8"?>
<persistence 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"
version="1.0">
<persistence-unit name="crm">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
<property name="hibernate.connection.url" value="jdbc:mysql://localhost/crm"/>
<property name="hibernate.connection.username" value="crmuser"/>
<property name="hibernate.connection.password" value="mypass"/>
<property name="hibernate.c3p0.min_size" value="5"/>
<property name="hibernate.c3p0.max_size" value="20"/>
<property name="hibernate.c3p0.idleTestPeriod" value="30"/>
<property name="hibernate.c3p0.timeout" value="0"/>
<property name="hibernate.c3p0.max_statements" value="0"/>
<property name="hibernate.format_sql" value="true"/>
<property name="hibernate.query.jpaql_strict_compliance" value="false"/>
<property name="hibernate.validator.apply_to_ddl" value="false"/>
<property name="hibernate.validator.autoregister_listeners" value="false"/>
<property name="hibernate.archive.autodetection" value="class, hbm"/>
<property name="hibernate.hbm2ddl.auto" value="create"/>
</properties>
</persistence-unit>
</persistence>
EDIT: here's how I'm getting my EntityManager and persisting:
public void persist()
{
EntityManager em = entityManager();
try
{
em.getTransaction().begin();
em.persist(this);
em.getTransaction().commit();
}
finally
{
em.close();
}
}
public static EntityManager entityManager()
{
return EMF.get().createEntityManager();
}
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