好的,我对此很陌生。我想做的是说“这些类在这里(数据库a)和这些类在那里(数据库b)持久化”。我想我应该在不同的持久性单元组下明确定义类,这些组还可以包含带有驱动程序信息的属性集合。
<persistence-unit name="nytdModel" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>gov.vermont.dcf.nytd.model.AbstractElementImpl</class>
...
<exclude-unlisted-classes>true</exclude-unlisted-classes>
<properties>
<property name="hibernate.connection.driver_class" value="net.sourceforge.jtds.jdbc.Driver"/>
<property name="hibernate.connection.url" value="jdbc:jtds:sqlserver://localhost;..."/>
<property name="hibernate.connection.username" value="..."/>
<property name="hibernate.connection.password" value="..."/>
</properties>
</persistence-unit>
然后在我的道课程中,我应该只提供上下文:
@Repository
public class AFCARSJpaDao
{
@PersistenceContext(unitName = "nytdModel")
private EntityManager entityManger;
}
但是,我遇到了一个No unique bean of type [javax.persistence.EntityManagerFactory] is defined: expected single bean but found 2
错误。我究竟做错了什么?
我正在使用 Spring 3.0.4