org.springframework.dao.invaliddataaccessapiusageexception write operations

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

在执行service中一个方法bumenAuth()时出现错误:

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

查看srping中事务管理配置:

<bean id="txProxyTemplate" abstract="true"
  class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
  <property name="transactionManager">
   <ref bean="transactionManager" />
  </property>
  <property name="transactionAttributes">
   <props>
    <prop key="find*">PROPAGATION_REQUIRED</prop>
    <prop key="save*">PROPAGATION_REQUIRED</prop>
    <prop key="remove*">PROPAGATION_REQUIRED</prop>
    <prop key="update*">PROPAGATION_REQUIRED</prop>
    <prop key="create*">PROPAGATION_REQUIRED</prop>
    <prop key="add*">PROPAGATION_REQUIRED</prop>
    <prop key="del*">PROPAGATION_REQUIRED</prop>
    <prop key="clear*">PROPAGATION_REQUIRED</prop>
    <prop key="build*">PROPAGATION_REQUIRED</prop>
   </props>
  </property>
</bean>

看了之后才知道,原来的事务策略的<prop key="*">PROPAGATION_REQUIRED</prop>被删除后,bumenAuth()方法后忘了修改,所以导致报上述的错误

修改方法一:

     将此方法修改为update或者build,add....等上述策略名称开头的方法:如:updateBumenAuth()

修改方法二:

    增加<prop key="*">PROPAGATION_REQUIRED</prop>即可

修改方法三:

将web.xml下的

   <filter>
  <filter-name>OpenSessionInViewFilter</filter-name>
  <filter-class>
   org.springframework.orm.hibernate3.support.OpenSessionInViewFilter
  </filter-class>
  <init-param>
   <param-name>singleSession</param-name>
   <param-value>true</param-value>
  </init-param>
</filter>

中的singleSession值修改为false,即不限制整个过程用同一个session,但缺点是Hibernate Session的Instance可能会大增，使用的JDBC Connection量也会大增，如果Connection Pool的maxPoolSize设得太小，很容易就出问题

参考:关于OpenSessionView(http://liuwei1578.blog.163.com/blog/static/4958036420092104215514/)

Spring事务配置TransactionProxyFactoryBean(http://liuwei1578.blog.163.com/blog/static/49580364200921041136625/)