Question

我的应用程序包含几个并发运行的线程，所有线程都在我的表中插入或更新了几行，所以我使用saveOrUpdate（）来避免重复输入问题。但它发生了好几次。

我的表结构

CREATE TABLE `question` (`id` varchar(100) CHARACTER SET latin1 NOT NULL COMMENT 'It will be the post_id in )

我的HBM

<class name="com.xminds.bestfriend.frontend.model.Question" table="question" >
    <id name="id" type="string">
        <column name="id" length="100" />
        <generator class="assigned" />
    </id>
    <many-to-one name="users" class="com.xminds.bestfriend.frontend.model.Users" fetch="select">
        <column name="answer_uid" />
    </many-to-one>
    <many-to-one name="questionType" class="com.xminds.bestfriend.frontend.model.QuestionType" fetch="select">

        <column name="question_type_id" />
    </many-to-one>
    <property name="data1" type="string">
        <column name="data1" length="65535" />
    </property>
    <property name="data2" type="string">
        <column name="data2" length="65535" />
    </property>
    <property name="fbCreatedDate" type="timestamp">
        <column name="fb_created_date" length="19" />
    </property>
    <property name="permaLink" type="string">
        <column name="perma_link" length="1000" />
    </property>
    <property name="fbUpdatedDate" type="timestamp">
        <column name="fb_updated_date" length="19" />
    </property>
    <property name="contentActivity" type="java.lang.Integer">
        <column name="content_activity" />
    </property>
    <property name="nbConsumptions" type="int">
        <column name="nb_consumptions" not-null="true" />
    </property>
    <property name="createdDate" type="date">
        <column name="created_date" length="10" />
    </property>
    <property name="updatedDate" type="date">
        <column name="updated_date" length="10" />
    </property>
    <property name="cover_url" type="string">
      <column name="cover_url" length="1000"/>
    </property>

    <property name="category" type="string">
      <column name="category" length="1000"/>
    </property>
    <property name="width" type="int">
        <column name="width" not-null="true" />
    </property>
    <property name="height" type="int">
        <column name="height" not-null="true" />
    </property>
    <property name="coverOffsetX" type="java.lang.Integer">
        <column name="cover_offset_x" />
    </property>
    <property name="coverOffsetY" type="java.lang.Integer">
        <column name="cover_offset_y" />
    </property>
    <property name="latitude" type="java.lang.Double">
        <column name="latitude" precision="12" scale="0" />
    </property>
    <property name="longitude" type="java.lang.Double">
        <column name="longitude" precision="12" scale="0" />
    </property>
    <property name="is_active" type="boolean">
        <column name="is_active" not-null="true" />
    </property>
    <set name="questionConsumptions" inverse="true">
        <key>
            <column name="question_id" length="100" not-null="true">
                <comment>QuestionId</comment>
            </column>
        </key>
        <one-to-many class="com.xminds.bestfriend.frontend.model.QuestionConsumption" />
    </set>
</class>

获得异常

WARN  JDBCExceptionReporter - SQL Error: 1062, SQLState: 23000

错误JDBCExceptionReporter - 重复条目＆＃39; 1019306207_10200395396740374＆＃39;关键＆＃39; PRIMARY＆＃39; 错误AbstractFlushingEventListener - 无法将数据库状态与会话同步 org.hibernate.exception.ConstraintViolationException：无法插入：[com.xminds.bestfriend.frontend.model.Question] 在org.hibernate.exception.SQLStateConverter.convert（SQLStateConverter.java:96）在org.hibernate.exception.JDBCExceptionHelper.convert（JDBCExceptionHelper.java:66）在org.hibernate.persister.entity.AbstractEntityPersister.insert（AbstractEntityPersister.java:2436）在org.hibernate.persister.entity.AbstractEntityPersister.insert（AbstractEntityPersister.java:2856）在org.hibernate.action.EntityInsertAction.execute（EntityInsertAction.java:79）在org.hibernate.engine.ActionQueue.execute（ActionQueue.java:273）在org.hibernate.engine.ActionQueue.executeActions（ActionQueue.java:265）在org.hibernate.engine.ActionQueue.executeActions（ActionQueue.java:184）在org.hibernate.event.def.AbstractFlushingEventListener.performExecutions（AbstractFlushingEventListener.java:321）在org.hibernate.event.def.DefaultFlushEventListener.onFlush（DefaultFlushEventListener.java:51）在org.hibernate.impl.SessionImpl.flush（SessionImpl.java:1216）在org.hibernate.impl.SessionImpl.managedFlush（SessionImpl.java:383）在org.hibernate.transaction.JDBCTransaction.commit（JDBCTransaction.java:133）在org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit（HibernateTransactionManager.java:656）在org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit（AbstractPlatformTransactionManager.java:754）在org.springframework.transaction.support.AbstractPlatformTransactionManager.commit（AbstractPlatformTransactionManager.java:723）在org.springframework.transaction.support.TransactionTemplate.execute（TransactionTemplate.java:147）在com.xminds.bestfriend.consumers.Base.onMessage（Base.java:89）在org.springframework.jms.listener.adapter.MessageListenerAdapter.onMessage（MessageListenerAdapter.java:339）在org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener（AbstractMessageListenerContainer.java:535）在org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener（AbstractMessageListenerContainer.java:495）在org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener（AbstractMessageListenerContainer.java:467）在org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute（AbstractPollingMessageListenerContainer.java:325）在org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute（AbstractPollingMessageListenerContainer.java:263） at org.springframework.jms.listener.DefaultMessageListenerContainer $ AsyncMessageListenerInvoker.invokeListener（DefaultMessageListenerContainer.java:1058） at org.springframework.jms.listener.DefaultMessageListenerContainer $ AsyncMessageListenerInvoker.executeOngoingLoop（DefaultMessageListenerContainer.java:1050）在org.springframework.jms.listener.DefaultMessageListenerContainer $ AsyncMessageListenerInvoker.run（DefaultMessageListenerContainer.java:947）在java.lang.Thread.run（Thread.java:679）引起：com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException：重复条目＆＃39; 1019306207_10200395396740374＆＃39;关键＆＃39; PRIMARY＆＃39; at sun.reflect.NativeConstructorAccessorImpl.newInstance0（Native Method） at sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:57） at sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:45） at java.lang.reflect.Constructor.newInstance（Constructor.java:532）在com.mysql.jdbc.Util.handleNewInstance（Util.java:411）在com.mysql.jdbc.Util.getInstance（Util.java:386）在com.mysql.jdbc.SQLError.createSQLException（SQLError.java:1039）在com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:3597）在com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:3529）在com.mysql.jdbc.MysqlIO.sendCommand（MysqlIO.java:1990）在com.mysql.jdbc.MysqlIO.sqlQueryDirect（MysqlIO.java:2151）在com.mysql.jdbc.ConnectionImpl.execSQL（ConnectionImpl.java:2625）在com.mysql.jdbc.PreparedStatement.executeInternal（PreparedStatement.java:2119）在com.mysql.jdbc.PreparedStatement.executeUpdate（PreparedStatement.java:2415）在com.mysql.jdbc.PreparedStatement.executeUpdate（PreparedStatement.java:2333）在com.mysql.jdbc.PreparedStatement.executeUpdate（PreparedStatement.java:2318） at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate（NewProxyPreparedStatement.java:105）在org.hibernate.jdbc.NonBatchingBatcher.addToBatch（NonBatchingBatcher.java:46）在org.hibernate.persister.entity.AbstractEntityPersister.insert（AbstractEntityPersister.java:2416） ......还有25个错误QuestionGeneration - 无法处理任务ID：208 org.springframework.dao.DataIntegrityViolationException：无法插入：[com.xminds.bestfriend.frontend.model.Question]; SQL [插入问题（answer_uid，question_type_id，data1，data2，fb_created_date，perma_link，fb_updated_date，content_activity，nb_consumptions，created_date，updated_date，cover_url，category，width，height，cover_offset_x，cover_offset_y，latitude，longitude，is_active，id）值（？，？，？，？，？，？，？，？，？，？，？，？，？，？，？，？，？，？，？，？，？，？）];约束[null];嵌套异常是org.hibernate.exception.ConstraintViolationException：无法插入：[com.xminds.bestfriend.frontend.model.Question] 在org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException（SessionFactoryUtils.java:637）在org.springframework.orm.hibernate3.HibernateTransactionManager.convertHibernateAccessException（HibernateTransactionManager.java:793）在org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit（HibernateTransactionManager.java:664）在org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit（AbstractPlatformTransactionManager.java:754）在org.springframework.transaction.support.AbstractPlatformTransactionManager.commit（AbstractPlatformTransactionManager.java:723）在org.springframework.transaction.support.TransactionTemplate.execute（TransactionTemplate.java:147）在com.xminds.bestfriend.consumers.Base.onMessage（Base.java:89）在org.springframework.jms.listener.adapter.MessageListenerAdapter.onMessage（MessageListenerAdapter.java:339）在org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener（AbstractMessageListenerContainer.java:535）在org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener（AbstractMessageListenerContainer.java:495）在org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener（AbstractMessageListenerContainer.java:467）在org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute（AbstractPollingMessageListenerContainer.java:325）在org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute（AbstractPollingMessageListenerContainer.java:263） at org.springframework.jms.listener.DefaultMessageListenerContainer $ AsyncMessageListenerInvoker.invokeListener（DefaultMessageListenerContainer.java:1058） at org.springframework.jms.listener.DefaultMessageListenerContainer $ AsyncMessageListenerInvoker.executeOngoingLoop（DefaultMessageListenerContainer.java:1050）在org.springframework.jms.listener.DefaultMessageListenerContainer $ AsyncMessageListenerInvoker.run（DefaultMessageListenerContainer.java:947）在java.lang.Thread.run（Thread.java:679）引起：org.hibernate.exception.ConstraintViolationException：无法插入：[com.xminds.bestfriend.frontend.model.Question] 在org.hibernate.exception.SQLStateConverter.convert（SQLStateConverter.java:96）在org.hibernate.exception.JDBCExceptionHelper.convert（JDBCExceptionHelper.java:66）在org.hibernate.persister.entity.AbstractEntityPersister.insert（AbstractEntityPersister.java:2436）在org.hibernate.persister.entity.AbstractEntityPersister.insert（AbstractEntityPersister.java:2856）在org.hibernate.action.EntityInsertAction.execute（EntityInsertAction.java:79）在org.hibernate.engine.ActionQueue.execute（ActionQueue.java:273）在org.hibernate.engine.ActionQueue.executeActions（ActionQueue.java:265）在org.hibernate.engine.ActionQueue.executeActions（ActionQueue.java:184）在org.hibernate.event.def.AbstractFlushingEventListener.performExecutions（AbstractFlushingEventListener.java:321）在org.hibernate.event.def.DefaultFlushEventListener.onFlush（DefaultFlushEventListener.java:51）在org.hibernate.impl.SessionImpl.flush（SessionImpl.java:1216）在org.hibernate.impl.SessionImpl.managedFlush（SessionImpl.java:383）在org.hibernate.transaction.JDBCTransaction.commit（JDBCTransaction.java:133）在org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit（HibernateTransactionManager.java:656） ......还有14个引起：com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException：重复条目＆＃39; 1019306207_10200395396740374＆＃39;关键＆＃39; PRIMARY＆＃39; at sun.reflect.NativeConstructorAccessorImpl.newInstance0（Native Method） at sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:57） at sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:45） at java.lang.reflect.Constructor.newInstance（Constructor.java:532）在com.mysql.jdbc.Util.handleNewInstance（Util.java:411）在com.mysql.jdbc.Util.getInstance（Util.java:386）在com.mysql.jdbc.SQLError.createSQLException（SQLError.java:1039）在com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:3597）在com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:3529）在com.mysql.jdbc.MysqlIO.sendCommand（MysqlIO.java:1990）在com.mysql.jdbc.MysqlIO.sqlQueryDirect（MysqlIO.java:2151）在com.mysql.jdbc.ConnectionImpl.execSQL（ConnectionImpl.java:2625）在com.mysql.jdbc.PreparedStatement.executeInternal（PreparedStatement.java:2119）在com.mysql.jdbc.PreparedStatement.executeUpdate（PreparedStatement.java:2415）在com.mysql.jdbc.PreparedStatement.executeUpdate（PreparedStatement.java:2333）在com.mysql.jdbc.PreparedStatement.executeUpdate（PreparedStatement.java:2318） at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate（NewProxyPreparedStatement.java:105）在org.hibernate.jdbc.NonBatchingBatcher.addToBatch（NonBatchingBatcher.java:46）在org.hibernate.persister.entity.AbstractEntityPersister.insert（AbstractEntityPersister.java:2416） ......还有25个

@Override
public void saveOrUpdate(Object instance)
{

    //log.debug("attaching dirty  instance");
    try
    {
        getHibernateTemplate().saveOrUpdate(instance);
        //log.debug("attach successful");
    }
    catch (RuntimeException re)
    {
       // log.error("attach failed", re);
        throw re;
    }

}

Answer 1

你说，“我的应用程序包含几个并发运行的线程，所有线程都在我的表中插入或更新了几行”。并且您手动设置您的ID。我想知道，你为你的线程设置的ID，你是如何得到它们的？

Answer 2

你说＆＃39;在我的情况下，id（主键）不会自动递增，每次我都会设置它的值＆＃39;。这就是问题。在多个线程中，您应该确保自己生成的id应该是唯一的。

有两种方式，1，使用自动增量列 2，使用像UUID这样的东西来创建id。如果你只使用一个带有多个线程的jvm，有很多方法或库可以帮助你做到这一点。

当我尝试调用saveorupdate（）方法时，在休眠中发生重复输入

2 个答案: