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Write operations are not allowed in read-only mode (FlushMode.NEVER) - turn your Session into FlushMode.AUTO or remove 'readOnly' marker from transaction definition

2009-11-24 15:01:45| 分类： spring_1资料 | 标签： |举报 |字号大中小订阅

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错误代码:
org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.NEVER) - turn your Session into FlushMode.AUTO or remove 'readOnly' marker from transaction definition
错误原因:
OpenSessionInViewFilter在getSession的时候,会把获取回来的session的flush mode 设为FlushMode.NEVER。然后把该sessionFactory绑定到 TransactionSynchronizationManager，使request的整个过程都使用同一个session，在请求过后再接除该 sessionFactory的绑定，最后closeSessionIfNecessary根据该 session是否已和transaction绑定来决定是否关闭session。在这个过程中，若HibernateTemplate 发现自当前session有不是readOnly的transaction，就会获取到FlushMode.AUTO Session，使方法拥有写权限。
也即是，如果有不是readOnly的transaction就可以由Flush.NEVER转为 Flush.AUTO,拥有insert,update,delete操作权限，如果没有transaction，并且没有另外人为地设flush model的话，则doFilter的整个过程都是Flush.NEVER。所以受transaction保护的方法有写权限，没受保护的则没有。
参考文章:
http://calvin.blog.javascud.org/post/46.htm
解决办法:
采用spring的事务声明,使方法受transaction控制
<bean id="baseTransaction"
class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"
abstract="true">
<property name="transactionManager" ref="transactionManager"/>
<property name="proxyTargetClass" value="true"/>
<property name="transactionAttributes">
<props>
<prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
<prop key="find*">PROPAGATION_REQUIRED,readOnly</prop>
<prop key="load*">PROPAGATION_REQUIRED,readOnly</prop>
<prop key="save*">PROPAGATION_REQUIRED</prop>
<prop key="add*">PROPAGATION_REQUIRED</prop>
<prop key="update*">PROPAGATION_REQUIRED</prop>
<prop key="remove*">PROPAGATION_REQUIRED</prop>
</props>
</property>
</bean>
<bean id="userService" parent="baseTransaction">
<property name="target">
<bean class="com.phopesoft.security.service.impl.UserServiceImpl"/>
</property>
</bean>

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              blogAbstract:'<h2\>     <a rel=\"nofollow\" href=\"http://www.cnblogs.com/Macros/articles/440081.html\"  \><br\></a\>    </h2\>    错误代码:<br\>  org.<span\>springframework</span\>.<span\>dao</span\>.<span\>InvalidDataAccessApiUsageException</span\>: Write operations are not allowed in read-on<wbr\>ly mode <span\>(</span\>FlushMode.<span\>NEVER</span\><span\>)</span\> - turn your Session into FlushMode.<span\>AUTO</span\> or remove <span\>\'readOnly\'</span\> marker from transaction definition <br\>错误原因:<br\>   OpenSessionInViewFilter在getSession的时候,会把获取回来的session的flush mode  设为FlushMode.NEVER。然后把该sessionFactory绑定到  TransactionSynchronizationManage',
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