我正在尝试使用 Hibernate 4.3.5.Final 和 Spring 4.0.6 升级我们的应用程序。我的应用程序中任何有数据库写入操作的地方都会出现如下错误:
Caused by: org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.
at org.springframework.orm.hibernate4.HibernateTemplate.checkWriteOperationAllowed(HibernateTemplate.java:1135)
at org.springframework.orm.hibernate4.HibernateTemplate$26.doInHibernate(HibernateTemplate.java:826)
at org.springframework.orm.hibernate4.HibernateTemplate.doExecute(HibernateTemplate.java:340)
at org.springframework.orm.hibernate4.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:308)
at org.springframework.orm.hibernate4.HibernateTemplate.deleteAll(HibernateTemplate.java:823)
...
下面是我对 sessionFactory 和 transactionManager 的 spring 配置:
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mappingResources">
<list>
<value>com/mycompany/Person.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.HSQLDialect</prop>
</props>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
1:
为了全局设置 flushMode 以便应用程序像以前一样工作,我需要全局将 flushMode 设置为 AUTO,所以我不想使用 @Transactional(readOnly = false) 方法。
2:
在下面的帖子中,有人建议将 singleSession 设置为 false, Java / Hibernate - Write operations are not allowed in read-only mode
Spring 文档建议指定 "singleSession"="false"有副作用: http://docs.spring.io/spring/docs/4.0.6.RELEASE/javadoc-api/org/springframework/orm/hibernate3/support/OpenSessionInViewInterceptor.html
3:
我在 web.xml 中看到了很多类似下面的建议,它允许您拦截 hibernate3 session 并提供一个 session 版本,例如冲洗模式.AUTO。但是,当您使用 org.springframework.orm.hibernate4.support.OpenSessionInViewFilter 时,这在 hibernate 4 中不起作用。
<filter>
<filter-name>openSessionInViewFilter</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
<init-param>
<param-name>flushMode</param-name>
<param-value>AUTO</param-value>
</init-param>
</filter>
4:
下面建议的方法是使用 JPA 事务管理器,它遵循 HibernateJpaDialect 的复杂重新实现。我目前没有使用 JPA,而且这种方法似乎不够简单。 How do I set flush mode to "COMMIT" in my configuration files?
5:
我已经尝试在我的 spring 配置中使用以下内容(根据 Spring ORM 4.0.5 and Hibernate 4.3.5 - Cant save to database 上的建议), 它似乎不起作用,人们建议使用 web.xml 方法: Spring and Hibernate suddenly set the transaction to readonly
<tx:advice id="transactionAdvice" transaction-manager="transactionManager" >
<tx:attributes>
<tx:method name="*" read-only="false"/>
</tx:attributes>
</tx:advice>
问题:
任何人都可以建议一种允许为 Hibernate 4.3.5.Final 和 Spring 4.0.6 设置 FlushMode 的简单方法吗?
最佳答案
我最终用自定义实现覆盖了 OpenSessionInViewFilter:
1:
web.xml:
<filter>
<filter-name>openSessionInViewFilter</filter-name>
<filter-class>com.mycompany.AutoFlushOpenSessionInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>openSessionInViewFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
- Spring 需要 ContextLoaderListener 才能工作。
- AutoFlushOpenSessionInViewFilter 用于拦截来自/* url 模式的请求
2:
AutoFlushOpenSessionInViewFilter:
import org.hibernate.FlushMode;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.dao.DataAccessResourceFailureException;
import org.springframework.orm.hibernate4.support.OpenSessionInViewFilter;
public class AutoFlushOpenSessionInViewFilter extends OpenSessionInViewFilter {
protected Session openSession(SessionFactory sessionFactory) throws DataAccessResourceFailureException {
try {
Session session = sessionFactory.openSession();
session.setFlushMode(FlushMode.AUTO); // This line changes the default behavior
return session;
} catch (HibernateException ex) {
throw new DataAccessResourceFailureException("Could not open Hibernate Session", ex);
}
}
}
- OpenSessionInViewFilter 是拦截 hibernate session 的默认方式 (http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/orm/hibernate4/support/OpenSessionInViewFilter.html)
- openSession 方法打开一个 hibernate session 。 Hibernate 将使用此 session 而不是创建一个新 session
- hibernate3.support.OpenSessionInViewFilter 允许您提供 FlushMode,hibernate4.support.OpenSessionInViewFilter 对值进行硬编码,因此我用自己的实现覆盖了它
- 确保您的 sessionFactory bean 名称是 sessionFactory。否则,您需要将 sessionFactoryBeanName 设置为 web.xml 中的过滤器初始化参数
3:
所有 Spring bean 都需要在 Web 应用程序上下文 (web.xml) 中注册:
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:appContext.xml
...
</param-value>
</context-param>
4:
确保只在需要使用 spring bean 时从应用程序上下文中获取它们。以下是一个如何示例: http://sujitpal.blogspot.co.uk/2007/03/accessing-spring-beans-from-legacy-code.html
确保只创建了一个 Spring bean 副本! 如果您使用 org.springframework.context.support.ClassPathXmlApplicationContext 加载 Spring bean,这些 bean 将不会被过滤器拾取。
5:
在我的例子中,还需要一个 contextId
<context-param>
<param-name>contextId</param-name>
<param-value>myApp</param-value>
<description>Required contextId when filter is supplied</description>
</context-param>
否则我会遇到以下问题:
2014-09-02 10:59:50 StandardContext[/myApp]Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
java.lang.NoSuchMethodError: javax.servlet.ServletContext.getContextPath()Ljava/lang/String;
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:384)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3827)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4343)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595)
at org.apache.catalina.core.StandardHostDeployer.addChild(StandardHostDeployer.java:903)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:216)
at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:256)
at org.apache.commons.digester.Rule.end(Rule.java:276)
at org.apache.commons.digester.Digester.endElement(Digester.java:1058)
at org.apache.catalina.util.CatalinaDigester.endElement(CatalinaDigester.java:76)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
...
如果大家有兴趣,下面是我的ivy.xml里面的内容
<!--Spring 4.0.6.RELEASE -->
<dependency org="org.springframework" name="spring-aop" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-beans" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-core" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-expression" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-context" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-jdbc" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-orm" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-tx" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="org.springframework" name="spring-web" rev="4.0.6.RELEASE" conf="compile->master,sources,javadoc"/>
<dependency org="aopalliance" name="aopalliance" rev="1.0" conf="compile->master,sources,javadoc"/>
<!--Hibernate 4.3.5-->
<dependency org="org.hibernate" name="hibernate-core" rev="4.3.5.Final" conf="compile->master,compile,sources"/>
<dependency org="net.sf.ehcache" name="ehcache-core" rev="2.4.8" conf="compile->master,sources,javadoc"/>
<dependency org="org.slf4j" name="slf4j-api" rev="1.7.5" conf="compile->master,sources,javadoc"/>
希望这对在升级 Spring 和 Hibernate 时遇到相同问题的任何人有所帮助。
关于java - 如何使用 Spring 4.0.6 为 Hibernate 4.3.5.Final 全局设置 FlushMode?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/25620303/