JPA 2.0和EclipseLink 2.0的身份验证错误

Question

我是JPA的新手。我正在使用maven、Eclipselink2.0和JPA2.0。我已经使用数据库连接创建了实体。这是我的persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" 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_2_0.xsd">
    <persistence-unit name="certifications" transaction-type="JTA">
        <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
        <jta-data-source>jdbc/com/ni/ds_edata_soa_nontx</jta-data-source>
        <class>com.ni.apps.engineering.certification.entities.NicdsCliCertificationStg</class>
        <class>com.ni.apps.engineering.certification.entities.NicdsCliCertificationStgPK</class>
        <class>com.ni.apps.engineering.certification.entities.NicdsCliUpMapping</class>
        <exclude-unlisted-classes>false</exclude-unlisted-classes>          
        <properties>                        
            <property name="javax.persistence.jdbc.password" value="soa_user"/>
            <property name="javax.persistence.jdbc.user" value="soa_user"/>
            <property name="javax.persistence.jdbc.driver" value="oracle.jdbc.OracleDriver"/>
            <property name="eclipselink.logging.level.sql" value="FINE"/>           
        </properties>       
    </persistence-unit>
</persistence>

这是我在尝试运行应用程序时遇到的错误。

--编辑--这是我获取EntityManager的方式

private EntityManagerFactory emf;

    protected EntityManager getEntityManager(){
        if(emf == null){
            emf = Persistence.createEntityManagerFactory("certifications");
        }
        return emf.createEntityManager(); //This is where it fails
    }

Answer 1

您正在使用application server提供的JTA数据源，因此EclipseLink正在获得已经初始化的EntityManager。我认为您不需要额外的属性，因为这样EclipseLink就可以从DataSource创建连接为

ds.getConnection(username, password);

取而代之的是

ds.getConnection();

请尝试删除属性javax.persistence.jdbc.password、javax.persistence.jdbc.user和javax.persistence.jdbc.driver和ee（如果它适合您的话）。

如果您需要某个地方的EntityManager，请让WebLogic进行初始化，例如，在Servlet中，它将如下所示：

@WebServlet(urlPatterns = { "/Test" })
public class TestServlet {
  @PersistenceContext(unitName = "certifications")
  private EntityManager entityManager;
}