写入数据库时出现异常（org.hibernate.exception.ConstraintViolationException）
我有一个文件（该文件实际上具有制表符分隔值），必须将其写入数据库表之一。该文件也可以包含重复的条目。我正在处理文件中的 5000 条记录，因此我首先解析文件中的前 5000 条记录（如果它们包含任何重复条目）我只是忽略重复项并将其中的唯一记录写入数据库，然后再次处理下 5000 条记录以类似的方式记录，直到达到 EOF。现在，在写入这 5000 条记录时，5000 条记录的集合之间可能存在重复项，如果发生这种情况（然后数据库抛出 DomainObjectExistsException），那么我捕获异常并简单地更新记录。我正在执行如下更新操作：
getHibernateTemplate().saveOrUpdate(femtoFactoryData);
其中 femtoFactoryData 是一个 java 对象（POJO），必须将其写入由文件中的制表符分隔值构造的数据库表中。该表的主键只是Femto的ID和状态（临时/永久）。
但是在执行此更新操作时，我得到：
org.hibernate.exception.ConstraintViolationException
这是我的程序的堆栈跟踪：
org.hibernate.exception.ConstraintViolationException: could not insert: [com.airvana.anp.model.db.domainobjects.FemtoFactoryData]
at com.airvana.anp.model.db.impl.DbManagerGlobalUtils.convertException(DbManagerGlobalUtils.java:68)
at com.airvana.anp.model.db.impl.FemtoFactoryDataDAOImplHelper.updateFemtoFactoryData(FemtoFactoryDataDAOImplHelper.java:302)
at com.airvana.anp.model.db.impl.FemtoFactoryDataDAOImpl.updateFemtoFactoryData(FemtoFactoryDataDAOImpl.java:149)
at com.airvana.anp.model.oss.imports.common.DataRecordDAOHelperImpl.updateRecord(DataRecordDAOHelperImpl.java:725)
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.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:198)
at $Proxy89.updateRecord(Unknown Source)
at com.airvana.anp.model.oss.imports.parser.ParseControllerImpl.saveDupFactoryRecordsInDb(ParseControllerImpl.java:477)
at com.airvana.anp.model.oss.imports.parser.ParseControllerImpl.parseFile(ParseControllerImpl.java:111)
at com.airvana.anp.model.oss.imports.FactoryOperationsManagerImpl.onAllocation(FactoryOperationsManagerImpl.java:192)
at com.airvana.anp.model.resource.impl.CallbackWorkerJob.run(CallbackWorkerJob.java:43)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)
Caused by: org.springframework.dao.DataIntegrityViolationException: could not insert: [com.airvana.anp.model.db.domainobjects.FemtoFactoryData]; nested exception is org.hibernate.exception.ConstraintViolationException: could not insert: [com.airvana.anp.model.db.domainobjects.FemtoFactoryData]
at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:624)
at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:424)
at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
at org.springframework.orm.hibernate3.HibernateTemplate.merge(HibernateTemplate.java:820)
at com.airvana.anp.model.db.impl.FemtoFactoryDataDAOImplHelper.updateFemtoFactoryData(FemtoFactoryDataDAOImplHelper.java:299)
... 16 more
Caused by: org.hibernate.exception.ConstraintViolationException: could not insert: [com.airvana.anp.model.db.domainobjects.FemtoFactoryData]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2272)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2665)
at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:56)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1004)
at org.springframework.orm.hibernate3.HibernateAccessor.flushIfNecessary(HibernateAccessor.java:390)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:420)
... 19 more
Caused by: java.sql.SQLException: ORA-00001: unique constraint (ANPDB.SYS_C008651) violated
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:743)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:216)
at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:955)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1168)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3316)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3400)
at weblogic.jdbc.wrapper.PreparedStatement.executeUpdate(PreparedStatement.java:128)
at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:23)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2252)
... 29 more
I have a file(this file actually has tab separated values) which has to be written into one of the database tables. This file can contain duplicate entries as well. I am processing the records in the file in set of 5000, so I first parse these first 5000 records in the file if they contain any duplicate entries I simply ignore the duplicates and write the unique records among them to the database and again process next 5000 records in the similar fashion till EOF is reached. Now while writing these 5000 records it is possible that there are duplicates between the sets of 5000 records and if so happens(then database throws the DomainObjectExistsException) then I catch the exception and simply update the record. I am performing the update operation like this:
getHibernateTemplate().saveOrUpdate(femtoFactoryData);
Where femtoFactoryData is a java Object(POJO) which has to be written into the database table constructed from the tab-separated values in the file. The Primary Key of the table is nothing but the ID of the Femto and the state(Temporary/Permanent).
But while performing this update operation I am getting:
org.hibernate.exception.ConstraintViolationException
Here is the stacktrace from my program:
org.hibernate.exception.ConstraintViolationException: could not insert: [com.airvana.anp.model.db.domainobjects.FemtoFactoryData]
at com.airvana.anp.model.db.impl.DbManagerGlobalUtils.convertException(DbManagerGlobalUtils.java:68)
at com.airvana.anp.model.db.impl.FemtoFactoryDataDAOImplHelper.updateFemtoFactoryData(FemtoFactoryDataDAOImplHelper.java:302)
at com.airvana.anp.model.db.impl.FemtoFactoryDataDAOImpl.updateFemtoFactoryData(FemtoFactoryDataDAOImpl.java:149)
at com.airvana.anp.model.oss.imports.common.DataRecordDAOHelperImpl.updateRecord(DataRecordDAOHelperImpl.java:725)
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.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:198)
at $Proxy89.updateRecord(Unknown Source)
at com.airvana.anp.model.oss.imports.parser.ParseControllerImpl.saveDupFactoryRecordsInDb(ParseControllerImpl.java:477)
at com.airvana.anp.model.oss.imports.parser.ParseControllerImpl.parseFile(ParseControllerImpl.java:111)
at com.airvana.anp.model.oss.imports.FactoryOperationsManagerImpl.onAllocation(FactoryOperationsManagerImpl.java:192)
at com.airvana.anp.model.resource.impl.CallbackWorkerJob.run(CallbackWorkerJob.java:43)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:595)
Caused by: org.springframework.dao.DataIntegrityViolationException: could not insert: [com.airvana.anp.model.db.domainobjects.FemtoFactoryData]; nested exception is org.hibernate.exception.ConstraintViolationException: could not insert: [com.airvana.anp.model.db.domainobjects.FemtoFactoryData]
at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:624)
at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:424)
at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
at org.springframework.orm.hibernate3.HibernateTemplate.merge(HibernateTemplate.java:820)
at com.airvana.anp.model.db.impl.FemtoFactoryDataDAOImplHelper.updateFemtoFactoryData(FemtoFactoryDataDAOImplHelper.java:299)
... 16 more
Caused by: org.hibernate.exception.ConstraintViolationException: could not insert: [com.airvana.anp.model.db.domainobjects.FemtoFactoryData]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:71)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2272)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2665)
at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:56)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:167)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1004)
at org.springframework.orm.hibernate3.HibernateAccessor.flushIfNecessary(HibernateAccessor.java:390)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:420)
... 19 more
Caused by: java.sql.SQLException: ORA-00001: unique constraint (ANPDB.SYS_C008651) violated
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:288)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:743)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:216)
at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:955)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1168)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3316)
at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3400)
at weblogic.jdbc.wrapper.PreparedStatement.executeUpdate(PreparedStatement.java:128)
at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:23)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2252)
... 29 more
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评论（1）
您没有正确处理重复项，因为明显违反了有关唯一键的约束。
我建议在将这些重复项插入数据库之前完全消除它们。
请记住：数据库是您的最后一道防线。忽略诗意的方面，这基本上是说您应该尽一切可能将所需的内容插入到数据库中。不多不少。在将其发送到数据库之前，过滤、删除重复项以及服务器端的任何内容。
You're not handling duplicates properly since there's obviously constraint violation regarding unique keys.
I'd suggest eliminating those duplicates entirely before inserting them into database.
Remember: the database is your last line of defense. Ignoring the poetic aspect, that's basically saying that you should do whatever possible to insert into your database exactly what's needed. Nothing more, nothing less. Filter, remove duplicates, whatever on your server side before sending it to database.