Hibernate Inheritance.TABLE_PER_CLASS策略

Question

我在hibernate上遇到了一个非常大的问题。

我的继承策略在eclipselink下作为jpa提供者工作得很好，在glassfish和jboss应用服务器下都是如此，但是当我切换到hibernate时，一切都变得很顺利。

我在这里读了几篇文章，但都没有解决我的问题。

下面是堆栈跟踪。

Failed to start service
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1767) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_21]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_21]
    at java.lang.Thread.run(Thread.java:722) [rt.jar:1.7.0_21]
Caused by: java.lang.ClassCastException: org.hibernate.mapping.UnionSubclass cannot be cast to org.hibernate.mapping.RootClass
    at org.hibernate.cfg.annotations.PropertyBinder.bind(PropertyBinder.java:210)
    at org.hibernate.cfg.annotations.PropertyBinder.makePropertyValueAndBind(PropertyBinder.java:201)
    at org.hibernate.cfg.AnnotationBinder.processElementAnnotations(AnnotationBinder.java:2011)
    at org.hibernate.cfg.AnnotationBinder.processIdPropertiesIfNotAlready(AnnotationBinder.java:765)
    at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:684)
    at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:3406)
    at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3360)
    at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1334)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1724)
    at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:84)
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904)
    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:889)
    at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:73)
    at org.jboss.as.jpa.service.PersistenceUnitServiceImpl.createContainerEntityManagerFactory(PersistenceUnitServiceImpl.java:162)
    at org.jboss.as.jpa.service.PersistenceUnitServiceImpl.start(PersistenceUnitServiceImpl.java:85)
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
    ... 3 more

我已经确保没有子类定义另一个@Id列(在任何情况下，netbeans都会为我标记此错误)

这是我的一组继承：

@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@PartialSecurity
public abstract class DataVerification extends SecureEntity implements Serializable {

  private static final long serialVersionUID = IdGenerator.serialVersionUID(DataVerification.class);
  @Id
  private Long verificationId = IdGenerator.generateId();
  @Column(length = 50, nullable = false)
  private String verificationCode;
  private String verifiedId;
  private boolean verified;
  @Temporal(javax.persistence.TemporalType.TIMESTAMP)
  private Calendar verificationDate;
  private DataVerificationType dataVerificationType;
  private VerificationMethod verificationMethod;
  @OneToOne
  private Account verifiedBy;
  @OneToOne
  private Account approvedBy;


/**
 *
 * @author marembo
 */
@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public class OnlineDataVerification extends DataVerification implements Serializable {
  @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
  @Ignore
  private List<UploadFile> verificationFiles;


    /**
     *
     * @author marembo
     */
    @Entity
    public class IncomeDataVerification extends OnlineDataVerification implements Serializable {

      private static final long serialVersionUID = IdGenerator.serialVersionUID(IncomeDataVerification.class);
      private IncomeSource incomeSource;
      private String occupation;


/**
 *
 * @author marembo
 */
@Entity
public class AgentDataVerification extends OnlineDataVerification implements Serializable {

  @Column(length = 2048, nullable = false)
  private String comment;
  private String verificationTransaction = IdGenerator.generateStringId();

谢谢

Answer 1

堆栈跟踪可能是hibernate版本不一致问题。如果你把你的应用部署到JBoss上，JBoss已经有了自己的hibernate。如果您的war还附带了不同版本的Hibernate，则类路径上加载的实际类可能不一致，从而导致各种问题。

通常，最佳实践是，如果您正在部署到已经提供hibernate的容器，则不要将其捆绑到您的war中(例如:将依赖项标记为在maven pom上提供)