关于使用OpenSessionInViewFilter遇到的两个问题

cf316985294 2012-05-30 02:31:48

filter配置如下：
<filter>
<filter-name>openSessionInView</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
<init-param>
<param-name>sessionFactoryBeanName</param-name>
<param-value>sf</param-value>
</init-param>
<init-param>
<param-name>singleSession</param-name>
<param-value>false</param-value>
</init-param>
</filter>

<filter-mapping>
<filter-name>openSessionInView</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
事物配置如下：
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory" ref="sf"></property>
</bean>

<bean id="txManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sf" />
</bean>

<aop:config proxy-target-class="true">
<aop:advisor pointcut="execution(* com.test..service.impl.*(..))" advice-ref="txAdvice"/>
</aop:config>

<tx:advice id="txAdvice" transaction-manager="txManager">
<tx:attributes>
<tx:method name="exists"/>
<tx:method name="add*" propagation="REQUIRED"/>
<tx:method name="update*" propagation="REQUIRED"/>
<tx:method name="delete*" propagation="REQUIRED"/>
<tx:method name="find*" propagation="REQUIRED"/>
<tx:method name="save*" propagation="REQUIRED"/>
<tx:method name="get*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
一下有几种情况：
1.当不加入filter那段内容的时候，程序操作N次后卡住（此处我判断应该是事物没有起作用，打开的连接没有关闭，导致连接数超限），但我不知道为什么事物就不起作用了（当我加入filter那段，程序恢复正常）？
2.当filter段去掉
<init-param>
<param-name>singleSession</param-name>
<param-value>false</param-value>
</init-param>
程序插入或修改或删除时都报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 ，想请教下这段代码的作用是什么，加入这段代码事物有没有起作用？

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