当使用hibernate-envers时，AUD表中的所有@Version字段都为空，但在entity - table中填充的字段是空的吗？

Question

应用程序spring+jpa+envers(hibernate) envers需要将实体的历史记录保存在特定表中。

在我保存了几次实体之后，我希望在USER表中看到已填充的版本字段，并在USER_AUT中看到已填充的版本字段。但实际结果是用户表中的值是正确的，但在版本列中添加了REV_TYPE、REV列(字段中的所有行都是对应者的)和null。

我使用4.0.1。

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-envers</artifactId>
    <version>4.0.1.Final</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>4.0.1.Final</version>
</dependency>

但是，当我在表中查找时，版本字段中的所有值都为空

我的实体是

import lombok.*;
import org.hibernate.annotations.GenericGenerator;
import org.hibernate.envers.Audited;

import javax.persistence.*;

@Entity
@Audited
@Table(name = "User", uniqueConstraints = {
        @UniqueConstraint(columnNames = { "prKey"})})
@NoArgsConstructor(access = AccessLevel.PUBLIC)
@AllArgsConstructor
@Getter
@Setter
public class User {
    @Id
    @GeneratedValue(generator = "uuid")
    @GenericGenerator(name = "uuid", strategy = "uuid2")
    @Column(name = "PR_KEY", unique = true)
    private String prKey;

    @Column(name = "name", length = 100, unique = false)
    private String name;

    @Version
    private int version;

    public User(String name){
        this.name = name;
    }
}

当我使用audit获取实体时：

 public List<User> getHistory(String id) {
        AuditReader auditReader = AuditReaderFactory.get(entityManagerFactory.createEntityManager());

        List<Number> auditVersions = auditReader.getRevisions(User.class, id);
        List<User> users = auditVersions.stream().map(item -> auditReader.find(User.class, id, item.intValue())).collect(Collectors.toList());

        return extractRiskMetrics(riskMetricRecords);
    }

所以，我的持久化配置是

@Configuration
@EnableTransactionManagement
@EnableJpaAuditing
@EnableJpaRepositories(basePackages = {"persistence"})
@ComponentScan(basePackages = {"persistence", "model"})
public class PersistenceConfig {
    private static final String PACKAGE_WITH_JPA_ENTITIES = "persistence";
    private final Logger log = Logger.getLogger(getClass());

    @Bean
    @Resource(type = DataSource.class, lookup = "jdbc/MyDatasource", name = "jdbc/MyDatasource")
    public DataSource dataSource() {
        final JndiDataSourceLookup dsLookup = new JndiDataSourceLookup();
        dsLookup.setResourceRef(true);
        DataSource dataSource = dsLookup.getDataSource("java:comp/env/jdbc/MyDatasource");
        return dataSource;
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
        LocalContainerEntityManagerFactoryBean entityManager = new LocalContainerEntityManagerFactoryBean();
        entityManager.setDataSource(dataSource());
        entityManager.setPackagesToScan(PACKAGE_WITH_JPA_ENTITIES);
        entityManager.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
        entityManager.setJpaProperties(getHibernateProperties());
        log.info("Entity Manager configured.");
        return entityManager;
    }

    @Bean
    public JpaTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(entityManagerFactory);
        return transactionManager;
    }

    //Set properties hibernate
    private Properties getHibernateProperties() {
        Properties properties = new Properties();
        properties.put("hibernate.dialect", "org.hibernate.dialect.OracleDialect");
        properties.put("hibernate.show_sql", "true");
        properties.put("hibernate.hbm2ddl.auto", "none");
        properties.put("org.hibernate.envers.do_not_audit_optimistic_locking_field", false);

        properties.put("verifyServerCertificate", false);
        properties.put("useSSL", false);
        properties.put("requireSSL", false);
        properties.put("useLegacyDatetimeCode", false);
        properties.put("useUnicode", "yes");
        properties.put("characterEncoding", "UTF-8");
        properties.put("serverTimezone", "UTC");
        properties.put("useJDBCCompliantTimezoneShift", true);
        return properties;
    }
}

更新：

org.hibernate.envers.do_not_audit_optimistic_locking_field设置为false，但版本字段仍为空。

它可能与冲突的Spring Data、Jpa和Hibernate - envers有关吗？

实际上，执行的查询(changed和f.c.)

[1/22/19 14:04:51:996 MSK] 00000096 SystemOut     O Hibernate: update UserRecord set User=?, version=? where PR_KEY=? and version=?
[1/22/19 14:04:51:998 MSK] 00000096 SystemOut     O Hibernate: select hibernate_sequence.nextval from dual
[1/22/19 14:04:52:000 MSK] 00000096 SystemOut     O Hibernate: insert into REVINFO (REVTSTMP, REV) values (?, ?)
[1/22/19 14:04:52:002 MSK] 00000096 SystemOut     O Hibernate: insert into UserRecord_AUD (REVTYPE, busId, User, UserType, someInfo, PR_KEY, REV) values (?, ?, ?, ?, ?, ?, ?)

所以，在AUD表中没有where version=？

Answer 1

查看配置设置org.hibernate.envers.do_not_audit_optimistic_locking_field。

此配置设置控制Hibernate Envers是否将@Version注释字段包括在审核架构中。默认情况下，该设置被设置为true，这意味着乐观锁定字段将不会被审计。通过将其设置为false，您将审计该列的值。

我想提醒您，不要将此字段设置为false。

如果您的应用程序执行显式乐观锁定增量功能，这将导致向审计历史记录表中添加额外的行，即使在业务流程中没有更改任何其他数据库列。这是因为一旦启用了跟踪@Version字段，Hibernate Envers就会简单地将它们视为实体上的任何其他基本属性。因此，强制乐观锁增量将触发审计更改。

Answer 2

正如您所提到的- REVINFO是所有被审计实体的集中表。

下面介绍的基本思想是将修订号重新映射到整数序列-因此RevNumber(2,5,31,125)将重新映射到customVersion(1,2,3,4)

假设您有EntityA，并且希望获取它的所有修订(并将每个修订数据映射到一个自定义类RevisionEntityDto)。

使用Envers中的AuditReader，您可以执行以下操作：

AuditReader auditReader = AuditReaderFactory.get(entityManager);
//getRevisions() returns revisions sorted in ascending order (older revisions come first)
List<Number> entityARevisions = auditReader.getRevisions(EntityA.class, primaryKeyOfEntityA);

//entityARevisions is already sorted;
for (int customVersion = 0; customVersion < entityARevisions.size(); customVersion++) {
   createRevisionEntityDto(primaryKeyOfEntityA, auditReader, revision, customVersion);
}

private RevisionEntityDto createRevisionEntityDto(Long primaryKeyOfEntityA, AuditReader, Number revision) {
  EntityA revisionOfEntityA = auditReader.find(EntityA.class, primaryKey, revision);
  Date revDate = auditReader.getRevisionDate(revision);
  // at this point you have a single revision of EntityA
  return toRevisionEntityDto(revision, revisionOfEntityA, revDate);
}

private RevisionEntityDto toRevisionEntityDto(Number revision, EntityA revisionOfEntityA, Date revisionDate, int customVersion) {
  //here you do the mapping logic;
  RevisionEntityDto revEntityDto = new RevisionEntityDto();
  revEntityDto.setFieldA(revisionOfEntityA.getFieldA);
  revEntityDto.setDate(revisionDate); // you can use the date to sort if you want at a later stage;
  revEntityDto.setCustomVersion(customVersion);
  return revEntityDto;
}