無法使數據庫狀態與會話同步

我在嘗試持久保存一個ID爲生成值的實體時遇到問題。這個實體（A）在持續時間必須堅持級聯另一個實體（B）。 A和B中的關係是OneToMany，而B中相關的屬性是組合鍵的一部分。無法使數據庫狀態與會話同步

我使用Eclipse，JBOSS運行時，JPA/Hibernate的

這裏是我的代碼：

實體答：

@Entity 
public class Cambios implements Serializable { 
    private static final long serialVersionUID = 1L; 

    @SequenceGenerator(name="CAMBIOS_GEN",sequenceName="CAMBIOS_SEQ",allocationSize=1) 
    @Id @GeneratedValue(strategy=GenerationType.SEQUENCE, generator="CAMBIOS_GEN") 
    @Column(name="ID_CAMBIO") 
    private Long idCambio; 

    //bi-directional many-to-one association to ObjetosCambio 
    @OneToMany(cascade={CascadeType.PERSIST},mappedBy="cambios") 
    private List<ObjetosCambio> objetosCambioList; 

    public Cambios() { 
    } 

    ... 
}

實體B：

@Entity 
@Table(name="OBJETOS_CAMBIO") 
public class ObjetosCambio implements Serializable { 
    private static final long serialVersionUID = 1L; 

    @EmbeddedId 
    private ObjetosCambioPK id; 

    //bi-directional many-to-one association to Cambios 
    @ManyToOne 
    @JoinColumn(name="ID_CAMBIO", insertable=false, updatable=false) 
    private Cambios cambios; 

    //bi-directional many-to-one association to Objetos 
    @ManyToOne 
    @JoinColumn(name="ID_OBJETO", insertable=false, updatable=false) 
    private Objetos objetos; 

    public ObjetosCambio() { 
    } 

...

實體B PK：

@Embeddable 
public class ObjetosCambioPK implements Serializable { 
    //default serial version id, required for serializable classes. 
    private static final long serialVersionUID = 1L; 

    @Column(name="ID_OBJETO") 
    private Long idObjeto; 

    @Column(name="ID_CAMBIO") 
    private Long idCambio; 

    public ObjetosCambioPK() { 
    }

客戶：

public String generarCambio(){ 

     ServiceLocator serviceLocator = null; 
     try {   
      serviceLocator = serviceLocator.getInstance(); 
      FachadaLocal tcLocal; 
      tcLocal = (FachadaLocal)serviceLocator.getFacadeService("java:comp/env/negocio/Fachada"); 

      Cambios cambio = new Cambios(); 

      Iterator it = objetosLocal.iterator(); //OBJETOSLOCAL IS ALREADY POPULATED OUTSIDE OF THIS METHOD    
      List<ObjetosCambio> ocList = new ArrayList();    
      while (it.hasNext()){ 
        Objetos objeto = (Objetos)it.next(); 
        ObjetosCambio objetosCambio = new ObjetosCambio(); 
        objetosCambio.setCambios(cambio); //AT THIS TIME THIS "CAMBIO" DOES NOT HAVE ITS ID, ITS SUPPOSED TO BE GENERATED AT PERSISTENCE TIME 

        ObjetosCambioPK ocPK = new ObjetosCambioPK(); 
        ocPK.setIdObjeto(objeto.getIdObjeto()); 

        objetosCambio.setId(ocPK); 
        ocList.add(objetosCambio); 
           } 

      cambio.setObjetosCambioList(ocList); 

      tcLocal.persistEntity(cambio); 
      return "exito";    
       } catch (NamingException e) { 
        // TODO     
        e.printStackTrace();      
              } 
     return null; 
    } 


ERROR: 

15:23:25,717 WARN [JDBCExceptionReporter] SQL Error: 1400, SQLState: 23000 
15:23:25,717 ERROR [JDBCExceptionReporter] ORA-01400: no se puede realizar una inserción NULL en ("CDC"."OBJETOS_CAMBIO"."ID_CAMBIO") 

15:23:25,717 WARN [JDBCExceptionReporter] SQL Error: 1400, SQLState: 23000 
15:23:25,717 ERROR [JDBCExceptionReporter] ORA-01400: no se puede realizar una inserción NULL en ("CDC"."OBJETOS_CAMBIO"."ID_CAMBIO") 

15:23:25,717 ERROR [AbstractFlushingEventListener] Could not synchronize database state with session 
org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update 
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:94) 
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) 
    at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:275) 
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:266) 
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167) 
    at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321) 
    at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50) 
    at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027) 
    at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:365) 
    at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:504) 
    at com.arjuna.ats.internal.jta.resources.arjunacore.SynchronizationImple.beforeCompletion(SynchronizationImple.java:101) 
    at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.beforeCompletion(TwoPhaseCoordinator.java:269) 
    at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:89) 
    at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:177) 
    at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1423) 
    at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:137) 
    at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:75) 
    at org.jboss.aspects.tx.TxPolicy.endTransaction(TxPolicy.java:170) 
    at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:87) 
    at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:190) 
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) 
    at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76) 
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) 
    at org.jboss.ejb3.tx.NullInterceptor.invoke(NullInterceptor.java:42) 
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) 
    at org.jboss.ejb3.security.Ejb3AuthenticationInterceptorv2.invoke(Ejb3AuthenticationInterceptorv2.java:186) 
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) 
    at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:41) 
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) 
    at org.jboss.ejb3.BlockContainerShutdownInterceptor.invoke(BlockContainerShutdownInterceptor.java:67) 
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) 
    at org.jboss.aspects.currentinvocation.CurrentInvocationInterceptor.invoke(CurrentInvocationInterceptor.java:67) 
    at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:102) 
    at org.jboss.ejb3.session.SessionSpecContainer.invoke(SessionSpecContainer.java:176) 
    at org.jboss.ejb3.session.SessionSpecContainer.invoke(SessionSpecContainer.java:216) 
    at org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:207) 
    at org.jboss.ejb3.proxy.impl.handler.session.SessionProxyInvocationHandlerBase.invoke(SessionProxyInvocationHandlerBase.java:164) 
    at $Proxy298.persistEntity(Unknown Source) 
    at backing.SolicitudCambio.generarCambio(SolicitudCambio.java:521) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
    at java.lang.reflect.Method.invoke(Unknown Source) 
    at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:146) 
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:92) 
    at javax.faces.component.UICommand.broadcast(UICommand.java:332) 
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:287) 
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:401) 
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:95) 
    at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245) 
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:110) 
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:213) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:301) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190) 
    at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92) 
    at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126) 
    at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330) 
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829) 
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598) 
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: java.sql.BatchUpdateException: ORA-01400: no se puede realizar una inserción NULL en ("CDC"."OBJETOS_CAMBIO"."ID_CAMBIO")

提前感謝！ JM.-

我想手動設置cambios.idCambio但我仍然得到同樣的錯誤。 Hibernate應該在objetosCambioPK.idCambio和objetosCambio.cambios之間做一些映射。也許這就是我在這裏錯過的wthat，我不知道如何實現它。

有人嗎？

來源

2010-06-05 Steppen

我不認爲上面的代碼可以正常工作，您可嵌入的ObjetosCambioPK的idCambio根本就沒有指定，因此數據庫錯誤。其實我不知道如何以「全自動」的方式實現你想要的（我認爲它不可行），因此我會先persist()和flush()新的Cambios，然後將分配的Id設置爲組合鍵每個ObjetosCambio實例。

來源

2010-06-05 22:27:49

感謝您的迴應，我曾經完成過這個工作，但是它的架構不同（EJB3，Jdeveloper，Toplink），所以我知道這可以奏效。當時我使用'@ IdClass'註釋來代替'@ EmbeddedId'，但我已經讀過它不是現在最好的方法，似乎這個@IdClass只是在Hibernate中實現，因爲它兼容EJB2。除此之外，我還遇到'@ idClass'的問題......所以我更願意繼續爲這個問題尋找解決方案。關於您的建議： – Steppen 2010-06-06 00:22:40

「因此，我會先堅持（）和flush（）新的Cambios，然後在每個ObjetosCambio實例的組合鍵上設置分配的Id。」如果按照你說的方式這樣做，我不會冒着讓數據庫處於不一致狀態的風險嗎？（考慮到'ObjetosCambio'的例外情況持續時間） – Steppen 2010-06-06 00:23:19

@Steppen在ObjetosCambio持續時間的情況下，事務將被回滾並且不會處於不一致狀態。 – 2010-06-06 00:34:47

無法使數據庫狀態與會話同步

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