Java Hibernate问题和缺少的实体
我们有一个Java应用程序，它使用Hibernate将对象映射到Oracle数据库，虽然一切正常，但有一个特殊的情况会导致问题。首先，对映射进行简要概述： User类，映射到APP\u User，APP\u User是一个表。它具有到OrgUser对象的OneToMany映射：Java Hibernate问题和缺少的实体,java,oracle,hibernate,jpa,Java,Oracle,Hibernate,Jpa,我们有一个Java应用程序，它使用Hibernate将对象映射到Oracle数据库，虽然一切正常，但有一个特殊的情况会导致问题。首先，对映射进行简要概述： User类，映射到APP\u User，APP\u User是一个表。它具有到OrgUser对象的OneToMany映射： @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "user") private Set<OrgUs
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "user")
private Set<OrgUser> orgUsers;
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "organization")
private Set<OrgUser> orgUsers;
Caused by: javax.persistence.EntityNotFoundException: Unable to find Organization with id ORG-00002
at org.hibernate.ejb.Ejb3Configuration$Ejb3EntityNotFoundDelegate.handleEntityNotFound(Ejb3Configuration.java:155) ~[hibernate-entitymanager-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:210) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:251) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:148) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1079) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.internalLoad(SessionImpl.java:1006) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:613) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.EntityType.resolve(EntityType.java:441) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity(TwoPhaseLoad.java:168) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:134) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:995) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.Loader.doQuery(Loader.java:874) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:289) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.Loader.loadEntity(Loader.java:2033) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:82) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:72) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3719) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:449) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:418) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:204) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:251) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:148) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1079) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.internalLoad(SessionImpl.java:1006) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:613) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.EntityType.resolve(EntityType.java:441) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.EntityType.replace(EntityType.java:298) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.AbstractType.replace(AbstractType.java:178) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.TypeHelper.replace(TypeHelper.java:211) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.java:409) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:214) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:154) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:76) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:904) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:888) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:892) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:879) ~[hibernate-entitymanager-4.1.4.Final.jar:4.1.4.Final]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_18]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[na:1.6.0_18]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_18]
at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_18]
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240) ~[spring-orm-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at $Proxy53.merge(Unknown Source) ~[na:na]
at OrgUserDao.saveOrgObject(OrgUserDao.java:177) ~[classes/:na]
问题是，有没有一种方法可以把事情安排好，这样就不成问题了？在最坏的情况下，我们可以手动从数据库中删除孤立的实体用户记录，但由于实体可以/将继续从实体VW中删除，这将是一个持续存在的问题。因此，基本上您是说，除了Hibernate应用程序之外，其他会话直接访问数据库并在那里执行
delete版本增加1。这将解决问题。简单回答：我们不能那样做。更详细的回答：这不仅仅是一个用于Java应用程序的数据库，它还用于整个业务，而且有些事情我们无法直接控制。Java应用程序和整个数据库都是遗留系统，进行这样的更改将需要对两者进行重大检修。因此，基本上你是说，除了Hibernate应用程序之外，其他会话直接访问数据库并在那里执行delete
s。尝试通过更新状态说服他们只进行逻辑删除，并将版本增加1。这将解决问题。简单回答：我们不能那样做。更详细的回答：这不仅仅是一个用于Java应用程序的数据库，它还用于整个业务，而且有些事情我们无法直接控制。Java应用程序和整个数据库都是遗留系统，进行这样的更改将需要对两者进行重大检修。
public Object saveOrgObject(Object object) {
return entityManager.merge(object);
}
Caused by: javax.persistence.EntityNotFoundException: Unable to find Organization with id ORG-00002
at org.hibernate.ejb.Ejb3Configuration$Ejb3EntityNotFoundDelegate.handleEntityNotFound(Ejb3Configuration.java:155) ~[hibernate-entitymanager-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:210) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:251) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:148) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1079) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.internalLoad(SessionImpl.java:1006) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:613) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.EntityType.resolve(EntityType.java:441) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity(TwoPhaseLoad.java:168) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:134) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:995) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.Loader.doQuery(Loader.java:874) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:289) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.Loader.loadEntity(Loader.java:2033) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:82) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:72) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3719) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:449) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:418) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:204) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:251) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:148) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1079) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.internalLoad(SessionImpl.java:1006) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:613) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.EntityType.resolve(EntityType.java:441) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.EntityType.replace(EntityType.java:298) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.AbstractType.replace(AbstractType.java:178) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.type.TypeHelper.replace(TypeHelper.java:211) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.java:409) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:214) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:154) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:76) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:904) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:888) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.internal.SessionImpl.merge(SessionImpl.java:892) ~[hibernate-core-4.1.4.Final.jar:4.1.4.Final]
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:879) ~[hibernate-entitymanager-4.1.4.Final.jar:4.1.4.Final]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_18]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[na:1.6.0_18]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_18]
at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_18]
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240) ~[spring-orm-3.1.0.RELEASE.jar:3.1.0.RELEASE]
at $Proxy53.merge(Unknown Source) ~[na:na]
at OrgUserDao.saveOrgObject(OrgUserDao.java:177) ~[classes/:na]