本文介绍了我可以在没有 orm.xml 文件的情况下使用 Spring Data JPA 审计(改用 JavaConfig)吗?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在尝试让 Spring Data Auditing 在我的 Spring 3.2.8/Spring Data 1.5/Hibernate 4 项目中工作.

I'm trying to get Spring Data Auditing to work in my Spring 3.2.8 / Spring Data 1.5 / Hibernate 4 project.

根据 Spring Data Auditing docs,我已将 @CreatedBy 等注释添加到我的实体中,由 AuditorAware 实现创建,并在我的 JavaConfig 中对其进行实例化.但是,它似乎永远不会触发.

As per the Spring Data Auditing docs, I've added the @CreatedBy, etc annotations to my entities, created by AuditorAware implementation, and instantiated it from within my JavaConfig. However, it never seems to fire.

我发现文档有点混乱.看来JavaConfig条目替换了xml条目,但我不确定.

I find the docs a little confusing. It appears that the JavaConfig entry replaces the xml entry, but I am not sure.

我的应用程序中目前没有任何 orm.xml 文件.老实说,我什至不确定在哪里/如何配置它,或者我为什么需要它.我所有的实体都在使用注释.我曾尝试将 @EntityListeners(AuditingEntityListener.class) 添加到实体中,但这没有帮助.

I don't currently have any orm.xml file in my application. To be entirely honest, I'm not even sure where/how to configure it, or why I need it. All my entities are using annotations. I have tried adding @EntityListeners(AuditingEntityListener.class) to the entity, but that has not helped.

我当前的实体管理器是在没有 persistence.xml 文件的情况下定义的:

My current entity manager is defined without a persistence.xml file:

    <!--  entity manager -->
    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="jpaVendorAdapter" ref="hibernateJpaVendorAdapter"/>
        <property name="packagesToScan" value="com.ia.domain"/>
        <property name="jpaProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
                <prop key="hibernate.query.substitutions">true '1', false '0'</prop>
                <prop key="hibernate.generate_statistics">true</prop>
                <prop key="hibernate.show_sql">false</prop>
                <prop key="hibernate.format_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
                <prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop>
                <prop key="hibernate.connection.charSet">UTF-8</prop>
            </props>
        </property>
    </bean>

Java配置:

@Configuration
@EnableJpaAuditing
public class AuditConfig {
    @Bean
    public AuditorAware<User> auditorProvider(){
        return new SpringSecurityAuditorAware();
    }
}

实体:

@EntityListeners({AuditingEntityListener.class})
@Entity
public class User
{

  @TableGenerator(name="UUIDGenerator", pkColumnValue="user_id", table="uuid_generator", allocationSize=1)
  @Id
  @GeneratedValue(strategy=GenerationType.TABLE, generator="UUIDGenerator")
  @Column(name="id")
  private Long id;

  @NotNull
  private String username;

  @CreatedDate
  @NotNull
  @Temporal(TemporalType.TIMESTAMP)
  @Column(name="created_date", nullable=false)
  private Date createdDate;

  @LastModifiedDate
  @NotNull
  @Temporal(TemporalType.TIMESTAMP)
  @Column(name="last_modified_date", nullable=false)
  private Date lastModifiedDate;

  @CreatedBy
  @ManyToOne(fetch=FetchType.LAZY)
  @JoinColumn(name="created_by")
  private User createdBy;

  @LastModifiedBy
  @ManyToOne(fetch=FetchType.LAZY)
  @JoinColumn(name="last_modified_by")
  private User lastModifiedBy;
  private String password;
  private Boolean enabled;


...
}

我在 SpringSecurityAuditorAware 类中设置了一个断点,但它从未被击中.

I've put a breakpoint in my SpringSecurityAuditorAware class but it is never being hit.

我还需要 orm.xml 文件吗?EntityManager 是如何/在哪里引用它的?

Do I still need an orm.xml file? How/where is this referenced from the EntityManager?

推荐答案

短版:无

从 JPA 2.0 开始,无法在没有 XML 文件 (orm.xml) 的情况下定义此类实体侦听器.

Short version: No

As of JPA 2.0, it is not possible to define such entity listener without an XML file (orm.xml).

默认实体侦听器——适用于持久单元中所有实体的实体侦听器——可以通过 XML 描述符指定.(第 93 页)

长版:解决方法...

如果您项目中的所有实体都扩展了 AbstractAuditable 超类,那么您可以将 @EntityListeners({AuditingEntityListener.class}) 放在 AbstractAuditable 上.附加到实体类的侦听器由其子类继承.

Long version: The workaround...

If all entities in your project extends an AbstractAuditable superclass then you can put @EntityListeners({AuditingEntityListener.class}) on AbstractAuditable. Listeners attached to an entity class are inherited by its subclasses.

继承层次结构中的多个实体类和映射的超类可以定义侦听器类和/或直接在类上的生命周期回调方法.(第 93 页)

请注意,子类可以使用 @ExcludeSuperclassListeners 注释显式排除继承的侦听器.

Note that a subclass can exclude explicitly an inherited listener using the @ExcludeSuperclassListeners annotation.

我想引用规范中最后一个有趣的脚注:

There is one last interesting footnote from the spec I'd like to quote:

排除的侦听器可以通过列出来重新引入实体类它们在 EntityListeners 注释或 XML 中显式实体侦听器元素.(脚注 [45] 第 97 页)

以下是一些用于说明解决方法的代码:


Here is some code for illustrating the workaround:

AbstractAuditableEntity.java

import java.util.Date;

import javax.persistence.EntityListeners;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;

import org.springframework.data.annotation.CreatedDate;
import org.springframework.data.annotation.LastModifiedDate;
import org.springframework.data.jpa.domain.support.AuditingEntityListener;

@MappedSuperclass
@EntityListeners({AuditingEntityListener.class}) // AuditingEntityListener will also audit any subclasses of AbstractAuditable...
public abstract class AbstractAuditableEntity {
    @Id
    @GeneratedValue
    private Long id;

    @CreatedDate
    @Temporal(TemporalType.TIMESTAMP)
    private Date createdDate;

    @LastModifiedDate
    @Temporal(TemporalType.TIMESTAMP)
    private Date lastModifiedDate;
}

MyEntity.java

@Entity
public abstract class MyEntity extends AbstractAuditableEntity {

}

我认为可以使用接口 Auditable (@EntityListeners 可以出现在接口上)而不是 AbstractAuditable 类,但我没有试试看……

I think an interface Auditable may be used (@EntityListeners can appear on an interface) instead of an AbstractAuditable class but I didn't try...

参考:JSR-000317 Java Persistence 2.0 - 最终版本

这篇关于我可以在没有 orm.xml 文件的情况下使用 Spring Data JPA 审计(改用 JavaConfig)吗?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-04 07:14
查看更多