2 Replies Latest reply on Dec 15, 2005 4:57 PM by Gavin King

    Throw away changes on entity ?

    Louis Coetzee Apprentice

      Hi,

      I have been strugling with something which I though should be very straightforward. How to throw away changes made to an entity (e.g. not have the changes persisted to the database on em.flush()) ?

      My scenario:
      I have a normal parent/child entity model. I extract the parent entity, possibly add more children to it (or edit the existing children). When reaching the save method on my Stateful Session bean, my business logic determines that I should rather make a new copy of the current parent entity with its children (create a new instance of parent and all its children), save the copy, and not save the original (which is the one that was initially edited).

      The problem:
      I persist the copy, followed by a normal flush. The copy is persisted, but so is the original (which I don't want to persist!).

      I have tried using em.refresh(original) (but I get the exception below as some of the children do not have id's yet (as they haven't been persisted before)), setting the original to null and various combinations. But for now the original with edits gets updated in database as well as the copy of the parent enity and children.

      Any suggestions ?

      Thanks

      Louis





      13:41:35,652 ERROR [AssertionFailure] an assertion failure occured (this may indicate a bug in Hibernate, but is more likely due to unsafe use of the session)
      org.hibernate.AssertionFailure: null identifier
       at org.hibernate.engine.EntityKey.<init>(EntityKey.java:34)
       at org.hibernate.event.def.DefaultRefreshEventListener.onRefresh(DefaultRefreshEventListener.java:74)
       at org.hibernate.impl.SessionImpl.fireRefresh(SessionImpl.java:900)
       at org.hibernate.impl.SessionImpl.refresh(SessionImpl.java:885)
       at org.hibernate.engine.CascadingAction$3.cascade(CascadingAction.java:92)
       at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:213)
       at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:157)
       at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:108)
       at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:290)
       at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:185)
       at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:160)
       at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:108)
       at org.hibernate.engine.Cascade.cascade(Cascade.java:248)
       at org.hibernate.event.def.DefaultRefreshEventListener.onRefresh(DefaultRefreshEventListener.java:99)
       at org.hibernate.event.def.DefaultRefreshEventListener.onRefresh(DefaultRefreshEventListener.java:39)
       at org.hibernate.impl.SessionImpl.fireRefresh(SessionImpl.java:892)
       at org.hibernate.impl.SessionImpl.refresh(SessionImpl.java:877)
       at org.hibernate.ejb.AbstractEntityManagerImpl.refresh(AbstractEntityManagerImpl.java:165)
       at csir.history.seam.StuffManagementAction.save(StuffManagementAction.java:174)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:109)
       at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:124)
       at org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:62)
       at org.jboss.seam.interceptors.ValidationInterceptor.validateTargetComponent(ValidationInterceptor.java:57)
       at sun.reflect.GeneratedMethodAccessor118.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
       at org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:81)
       at org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:66)
       at org.jboss.seam.interceptors.OutcomeInterceptor.interceptOutcome(OutcomeInterceptor.java:19)
       at sun.reflect.GeneratedMethodAccessor117.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
       at org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:81)
       at org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:66)
       at org.jboss.seam.interceptors.RollbackInterceptor.rollbackIfNecessary(RollbackInterceptor.java:28)
       at sun.reflect.GeneratedMethodAccessor116.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
       at org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:81)
       at org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:66)
       at org.jboss.seam.interceptors.BijectionInterceptor.bijectTargetComponent(BijectionInterceptor.java:32)
       at sun.reflect.GeneratedMethodAccessor115.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
       at org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:81)
       at org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:66)
       at org.jboss.seam.interceptors.ConversationInterceptor.endOrBeginLongRunningConversation(ConversationInterceptor.java:46)
       at sun.reflect.GeneratedMethodAccessor114.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
       at org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:81)
       at org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:66)
       at org.jboss.seam.interceptors.BusinessProcessInterceptor.manageBusinessProcessContext(BusinessProcessInterceptor.java:58)
       at sun.reflect.GeneratedMethodAccessor113.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
       at org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:81)
       at org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:66)
       at org.jboss.seam.interceptors.RemoveInterceptor.removeIfNecessary(RemoveInterceptor.java:31)
       at sun.reflect.GeneratedMethodAccessor112.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.seam.util.Reflections.invoke(Reflections.java:13)
       at org.jboss.seam.interceptors.Interceptor.aroundInvoke(Interceptor.java:81)
       at org.jboss.seam.interceptors.SeamInvocationContext.proceed(SeamInvocationContext.java:66)
       at org.jboss.seam.ejb.SeamInterceptor.aroundInvoke(SeamInterceptor.java:41)
       at sun.reflect.GeneratedMethodAccessor111.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:79)
       at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:65)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
       at org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:44)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
       at org.jboss.ejb3.entity.FlushModeInterceptor.invoke(FlushModeInterceptor.java:58)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
       at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:32)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
       at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:133)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
       at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:113)
       at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:138)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
       at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:61)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
       at org.jboss.ejb3.entity.BeforeTxFlushModeInterceptor.invoke(BeforeTxFlushModeInterceptor.java:33)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
       at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:63)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
       at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:32)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
       at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:91)
       at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:98)
       at org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:136)
       at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:83)
       at $Proxy150.save(Unknown Source)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
       at java.lang.reflect.Method.invoke(Method.java:585)
       at com.sun.el.parser.AstValue.invoke(AstValue.java:151)
       at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:283)
       at com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
       at com.sun.facelets.el.LegacyMethodBinding.invoke(LegacyMethodBinding.java:69)
       at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:63)
       at javax.faces.component.UICommand.broadcast(UICommand.java:106)
       at javax.faces.component.UIViewRoot._broadcastForPhase(UIViewRoot.java:90)
       at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:164)
       at org.apache.myfaces.lifecycle.LifecycleImpl.invokeApplication(LifecycleImpl.java:316)
       at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:86)
       at javax.faces.webapp.FacesServlet.service(FacesServlet.java:106)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(ExtensionsFilter.java:122)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.jboss.seam.servlet.SeamExceptionFilter.doFilter(SeamExceptionFilter.java:40)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
       at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
       at org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
       at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
       at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:407)
       at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
       at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
       at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
       at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
       at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
       at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
       at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
       at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
       at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
       at java.lang.Thread.run(Thread.java:595)