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我正在使用 Spring 事务管理来控制带休眠的应用程序,它使用两个线程实例来访问并发数据库并修改一个表。它确保值被保存。之前的表格是:
quantidade_livro_id | quantidade | livro_id | tt
---------------------+------------+----------+----
7 | 100 | 3 | as
5 | 100 | 1 | as
6 | 100 | 2 | as
后面的表格:
quantidade_livro_id | quantidade | livro_id | tt
---------------------+------------+----------+----
7 | 100 | 3 | as
5 | 50 | 1 | as
6 | 150 | 2 | as
主要代码启动了两个线程:
Servico t1 = new Servico();
Servico t2 = new Servico();
//transaction 1
t1.setId1(5);
t1.setValorTransacao(50);
t1.setId2(6);
//transaction 2
t2.setId1(5);
t2.setValorTransacao(100);
t2.setId2(7);
//start transaction 1
t1.start();
//start transaction 2
t2.start();
Servico 类是:
public void run() {
executa();
}
public void executa(){
ApplicationContext appContext =
new ClassPathXmlApplicationContext("spring/config/BeanLocations.xml");
livroQuantidadeBo = (LivroQuantBo)appContext.getBean("livroQuantBoProxy");
try {
livroQuantidadeBo.transacao(getId1(),getValorTransacao(),getId2());
} catch (RuntimeException e) {
// TODO Auto-generated catch block
System.out.println(e);
}
类 LivroQuantBoImpl 有方法:
public void transacao(int id1,int valorTransferencia, int id2) throws RuntimeException{
LivroQuantidade livroQ = livroQuantDao.find(id1);
LivroQuantidade livroQ2 = livroQuantDao.find(id2);
if(livroQ.getQuantidade() - valorTransferencia >= 0){
livroQ.setQuantidade(livroQ.getQuantidade() - valorTransferencia);
livroQ2.setQuantidade(valorTransferencia + livroQ2.getQuantidade());
livroQuantDao.update(livroQ);
livroQuantDao.update(livroQ2);
}
}
我的 Spring .conf 是:
<!-- DATASOURCE -->
<bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<value>properties/database.properties</value>
</property>
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!-- HIBERNATE -->
<!-- Hibernate session factory -->
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource"/>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
<property name="mappingResources">
<list>
<value>hibernate/Livro.hbm.xml</value>
<value>hibernate/LivroQuantidade.hbm.xml</value>
</list>
</property>
</bean>
<!-- TRANSAÇÃO -->
<bean id="transactionInterceptor" class="org.springframework.transaction.interceptor.TransactionInterceptor">
<property name="transactionManager" ref="transactionManager" />
<property name="transactionAttributes">
<props>
<prop key="save">PROPAGATION_REQUIRED</prop>
<prop key="transacao">PROPAGATION_REQUIRED</prop>
<prop key="transacao">ISOLATION_SERIALIZABLE</prop>
</props>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="dataSource" ref="dataSource" />
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<!-- BEANS -->
<!-- Livro business object -->
<bean id="livroBo" class="br.com.spring.bo.LivroBoImpl" >
<property name="livroDao" ref="livroDao" />
<property name="livroQuantBo" ref="livroQuantBo" />
</bean>
<!-- Livro Data Access Object -->
<bean id="livroDao" class="br.com.spring.dao.LivroDaoImpl" >
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<!-- ProductQoh business object -->
<bean id="livroQuantBo" class="br.com.spring.bo.LivroQuantBoImpl" >
<property name="livroQuantDao" ref="livroQuantDao" />
</bean>
<!-- ProductQoh Data Access Object -->
<bean id="livroQuantDao" class="br.com.spring.dao.LivroQuantDaoImpl" >
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<!-- PROXY -->
<bean id="livroBoProxy"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="target" ref="livroBo" />
<property name="interceptorNames">
<list>
<value>transactionInterceptor</value>
</list>
</property>
</bean>
<bean id="livroQuantBoProxy"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="target" ref="livroQuantBo" />
<property name="interceptorNames">
<list>
<value>transactionInterceptor</value>
</list>
</property>
</bean>
它正在执行此运行时异常:
Hibernate: select livroquant0_.quantidade_livro_id as quantidade1_2_, livroquant0_.quantidade as quantidade2_, livroquant0_.livro_id as livro3_2_ from springhibernate2.quantidadeLivro livroquant0_ where livroquant0_.quantidade_livro_id=?
Hibernate: select livroquant0_.quantidade_livro_id as quantidade1_3_, livroquant0_.quantidade as quantidade3_, livroquant0_.livro_id as livro3_3_ from springhibernate2.quantidadeLivro livroquant0_ where livroquant0_.quantidade_livro_id=?
Hibernate: select livroquant0_.quantidade_livro_id as quantidade1_3_, livroquant0_.quantidade as quantidade3_, livroquant0_.livro_id as livro3_3_ from springhibernate2.quantidadeLivro livroquant0_ where livroquant0_.quantidade_livro_id=?
Hibernate: select livroquant0_.quantidade_livro_id as quantidade1_2_, livroquant0_.quantidade as quantidade2_, livroquant0_.livro_id as livro3_2_ from springhibernate2.quantidadeLivro livroquant0_ where livroquant0_.quantidade_livro_id=?
Hibernate: update springhibernate2.quantidadeLivro set quantidade=?, livro_id=? where quantidade_livro_id=?
Hibernate: update springhibernate2.quantidadeLivro set quantidade=?, livro_id=? where quantidade_livro_id=?
Hibernate: update springhibernate2.quantidadeLivro set quantidade=?, livro_id=? where quantidade_livro_id=?
Hibernate: update springhibernate2.quantidadeLivro set quantidade=?, livro_id=? where quantidade_livro_id=?
Nov 6, 2012 3:02:49 PM org.hibernate.util.JDBCExceptionReporter logExceptions
WARNING: SQL Error: 0, SQLState: 40001
Nov 6, 2012 3:02:49 PM org.hibernate.util.JDBCExceptionReporter logExceptions
SEVERE: Batch entry 0 update springhibernate2.quantidadeLivro set quantidade='0', livro_id='1' where quantidade_livro_id='5' was aborted. Call getNextException to see the cause.
Nov 6, 2012 3:02:49 PM org.hibernate.util.JDBCExceptionReporter logExceptions
WARNING: SQL Error: 0, SQLState: 40001
Nov 6, 2012 3:02:49 PM org.hibernate.util.JDBCExceptionReporter logExceptions
SEVERE: ERROR: could not serialize access due to concurrent update
Nov 6, 2012 3:02:49 PM org.hibernate.event.def.AbstractFlushingEventListener performExecutions
SEVERE: Could not synchronize database state with session
org.hibernate.exception.LockAcquisitionException: Could not execute JDBC batch update
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:82)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:254)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:237)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:142)
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:1000)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:656)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:393)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy0.transacao(Unknown Source)
at br.com.spring.service.Servico.executa(Servico.java:29)
at br.com.spring.service.Servico.run(Servico.java:19)
Caused by: java.sql.BatchUpdateException: Batch entry 0 update springhibernate2.quantidadeLivro set quantidade='0', livro_id='1' where quantidade_livro_id='5' was aborted. Call getNextException to see the cause.
at org.postgresql.jdbc2.AbstractJdbc2Statement$BatchResultHandler.handleError(AbstractJdbc2Statement.java:2621)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1837)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:407)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:2754)
at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:247)
... 17 more
org.springframework.dao.CannotAcquireLockException: Could not execute JDBC batch update; SQL [update springhibernate2.quantidadeLivro set quantidade=?, livro_id=? where quantidade_livro_id=?]; nested exception is org.hibernate.exception.LockAcquisitionException: Could not execute JDBC batch update
怎么了?
最佳答案
您可以查看以下链接以了解主题 12.2.2。可序列化隔离级别
http://www.postgresql.org/docs/8.1/static/transaction-iso.html
关于spring - 使用 isolation_serializable 使用 Spring 和 hibernate 进行事务管理,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13256760/
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