java-覆盖EclipseLink EntityManager

有没有办法覆盖EclipseLink提供的EntityManager？
我想重写EclipseLink的EntityManager.remove()方法-我不希望物理移除(仅逻辑上).
扩展适当的EntityManager很容易：

public class MyEntityManager extends org.eclipse.persistence.internal.jpa.EntityManagerImpl {

    public MyEntityManager(String sessionName) {
        super(sessionName);
    }

    public void remove(Object entity) {
        AbstractEntity en = (AbstractEntity)entity;
        en.setAuditRD(33333);
        this.merge(en);
    }
}

但是如何将其传递给EclipseLink的工厂以创建MyEntityManager而不是org.eclipse.persistence.internal.jpa.EntityManagerImpl？也许有什么参数可以传递给persistence.xml文件？

解决方法:

在persistence.xml类中,您可以使用provider元素来决定.只需将您的提供程序(而不是EntityManager)的实现放在那里. JPA规范摘录：

8.2.1.4 provider

The provider element specifies the name of the persistence provider’s javax.persistence.spi.PersistenceProvider
class. The provider element is optional, but should be specified if
the application is dependent upon a particular persistence provider
being used.

文件示例：

<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="myapp">
      <provider>org.mydomain.ejb.MyPersistenceProvider</provider>
      <jta-data-source>java:/DefaultDS</jta-data-source>
   </persistence-unit>
</persistence> 

标签：jpa,override,eclipselink,java
来源： https://codeday.me/bug/20191121/2054976.html