java - 加载的记录不是最新的。使用 Hibernate 和 OpenSessionInViewFilter

Question

我正在使用 OpenSessionInViewFilter、Spring 和 Hibernate 进行数据访问。当我提交数据记录时，我的 View 结果不显示使用延迟加载的提交记录。我的 session 工厂配置如下所示:

<bean id="dbcpDataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="${database.driver}" />
    <property name="url" value="${database.url}" />
    <property name="username" value="${database.user}" />
    <property name="password" value="${database.password}" />
    <property name="poolPreparedStatements" value="true" />
    <property name="defaultAutoCommit" value="true" />
</bean>

<tx:annotation-driven transaction-manager="txManager" />
<bean id="txManager"
    class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dbcpDataSource" />
</bean>

<bean id="sessionFactory"
    class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="dbcpDataSource" />
    <property name="annotatedClasses">
        <list>
            <value>or.pac.Address</value>
            <value>or.pac.Customer</value>
            <value>or.pac.Documents</value>
        </list>
    </property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
            <prop key="hibernate.connection.release_mode">auto</prop>
            <prop key="hibernate.current_session_context_class">jta</prop>
            <prop key="hibernate.transaction.auto_close_session">true</prop>
            <prop key="hibernate.show_sql">false</prop>
            <prop key="hibernate.generate_statistics">false</prop>
            <prop key="hibernate.cache.use_query_cache">true</prop>
            <prop key="hibernate.max_fetch_depth">4</prop>
            <prop key="hibernate.cache.use_second_level_cache">true</prop>
            <prop key="hibernate.cache.use_query_cache">true</prop>
            <prop key="hibernate.cache.region.factory_class">net.sf.ehcache.hibernate.EhCacheRegionFactory</prop>
            <prop key="hibernate.hbm2ddl.auto">update</prop>
        </props>
    </property>
</bean> 
   <bean id="locator" class="cc.SessionLocator">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

OpenSessionInViewFilter web.xml 中的配置看起来完全像这样:

    <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>
    <init-param>
        <param-name>flushMode</param-name>
        <param-value>AUTO</param-value>
    </init-param>
    <init-param>
        <param-name>sessionFactoryBeanName</param-name>
        <param-value>sessionFactory</param-value>
    </init-param>
</filter>

<filter-mapping>
    <filter-name>openSessionInViewFilter</filter-name>
    <url-pattern>/*</url-pattern>
    <dispatcher>FORWARD</dispatcher>
</filter-mapping>

要为我的 DAO 获取 session ，我有下面的 SessionLocator 类，它为我打开 session ；

public class SessionLocator{

public static final ThreadLocal session = new ThreadLocal();
private static SessionLocator me;

static {
    try {
        me = new SessionLocator();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

private SessionLocator() throws HibernateException, JDBCException {
}

public static Session currentSession() throws Exception {
    Session s = (Session) session.get();
    if (s != null) {
        s.setCacheMode(CacheMode.REFRESH);
    }

    if (s == null) {
        synchronized SessionLocator{
            s =openSession();
        }
        session.set(s);
    }

    return s;
}



public void setSessionFactory(SessionFactory sessionFactory) {
    PersistenceManager.sessionFactory = sessionFactory;
}

public static Session openSession() {
    Session session = SessionFactoryUtils.doGetSession(sessionFactory, true);
    return session;
}

private static SessionFactory sessionFactory;

然后在我的 DAO 服务中，我像这样保存和更新:

    public boolean upsert(Object d) {
    try {
        SessionLocator.currentSession().saveOrUpdate(d);
                } catch (Exception e) {
        e.printStackTrace();
        return false;
    }
    return true;
}

当我调用 upsert() 时，我可以看到表中的记录，但更新后的值在延迟加载期间不会显示在我的 View 中。有谁知道为什么 hibernate 缓存没有用当前记录刷新？

Answer 1

此问题已通过从 openSessionInViewFilter 配置中删除以下行得到解决:

<dispatcher>FORWARD</dispatcher>

并用@Transactional注解对DAO服务进行注解

@Transactional
public boolean upsert(Object d) {
try {
    SessionLocator.currentSession().saveOrUpdate(d);

    } catch (Exception e) {

    e.printStackTrace();
    return false;
   }
   return true;
   }