休眠不更新记录 - Wicket

Question

我正在与Wicket，Spring和Hibernate的Web应用程序工作，我遇到了更新记录的问题。我已验证saveOrUpdate方法已被调用，并且域对象中的数据已更改。然而，SQL输出不会显示对数据库所做的任何更改（例如UPDATE），并且受影响的记录尚未更新。

我猜想它更有意义使用update（），但我saveOrUpdate（）确实设法创建新记录，但它不会更新它们。我已验证此方法被调用，并且传递的UserVO确实包含更新的字段。这里的DAO方法：

 
public class SkuldwebDAOImpl extends HibernateDaoSupport implements SkuldwebDAO { 
    public void updateUser(UserVO userVO) { 
     getSession().saveOrUpdate(userVO); 
    } 
} 

这里是我的属性文件：

 
jdbc.driver=com.mysql.jdbc.Driver 
jdbc.url=jdbc:mysql://localhost/skuldweb_dev;AUTO=MULTI;CURSOR=READONLY 
jdbc.username= 
jdbc.password= 
hibernate.dialect=org.hibernate.dialect.MySQLDialect 
hibernate.show_sql=true 
hibernate.use_outer_join=true
 
hibernate.cache.use_query_cache=true 
hibernate.cache.use_second_level_cache=true 
hibernate.cache.provider=org.hibernate.cache.HashtableCacheProvider
 
hibernate.schemaUpdate=true 

下面是applicationContext.xml中SessionFactory的豆：

 
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> 
     <property name="dataSource" ref="dataSource"/> 
     <property name="hibernateProperties"> 
      <props> 
       <prop key="hibernate.dialect">${hibernate.dialect}</prop> 
       <prop key="hibernate.show_sql">${hibernate.show_sql}</prop> 
       <prop key="use_outer_join">${hibernate.use_outer_join}</prop> 
       <prop key="hibernate.cache.use_second_level_cache">${hibernate.cache.use_second_level_cache}</prop> 
       <prop key="hibernate.cache.use_query_cache">${hibernate.cache.use_query_cache}</prop> 
       <prop key="hibernate.cache.provider_class">${hibernate.cache.provider}</prop> 
       <prop key="hibernate.connection.pool_size">10</prop> 
       <prop key="hibernate.connection.autocommit">true</prop> 
       <prop key="hibernate.jdbc.batch_size">1000</prop> 
       <prop key="hibernate.bytecode.use_reflection_optimizer">true</prop> 
      </props> 
     </property> 
     
     <property name="annotatedClasses"> 
      <list> 
       <value>com.upbeat.app.skuldweb.domain.UserVO</value> 
       <value>com.upbeat.app.skuldweb.domain.UserLevelVO</value>
 
      </list> 
     </property> 
     <property name="schemaUpdate" value="${hibernate.schemaUpdate}"/> 
    </bean> 

Hopefully one of you can help me out.

Updated Here's some info from the log (onSubmit() sets off these entries in the log -- the last entry should be when the request is being redirected to another page (after the record should have been updated).

 

[DEBUG] 2010-07-23 00:29:26,302 :org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.lookupSessionFactory(OpenSessionInViewFilter.java:239): Using SessionFactory 'sessionFactory' for OpenSessionInViewFilter 
[DEBUG] 2010-07-23 00:29:26,302 :org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:214): Returning cached instance of singleton bean 'sessionFactory' 
[DEBUG] 2010-07-23 00:29:26,302 :org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:181): Opening single Hibernate Session in OpenSessionInViewFilter 
[DEBUG] 2010-07-23 00:29:26,302 :org.springframework.orm.hibernate3.SessionFactoryUtils.doGetSession(SessionFactoryUtils.java:318): Opening Hibernate Session 
[DEBUG] 2010-07-23 00:29:26,303 :org.hibernate.impl.SessionImpl.(SessionImpl.java:247): opened session at timestamp: 5242215490777088 
[TRACE] 2010-07-23 00:29:26,303 :org.hibernate.impl.SessionImpl.setFlushMode(SessionImpl.java:1316): setting flush mode to: NEVER 
[DEBUG] 2010-07-23 00:29:26,305 :org.apache.wicket.Session.getPage(Session.java:700): Getting page [path = 4:userprofile_form, versionNumber = 0] 
[DEBUG] 2010-07-23 00:29:26,306 :org.apache.wicket.markup.html.form.persistence.CookieValuePersister.getCookie(CookieValuePersister.java:210): Unable to find Cookie with name=userprofile_form.email and request URI=/upbeat-app-skuld-web/ 
[TRACE] 2010-07-23 00:29:26,308 :org.hibernate.engine.IdentifierValue.isUnsaved(IdentifierValue.java:127): id unsaved-value: 0 
[TRACE] 2010-07-23 00:29:26,308 :org.hibernate.event.def.AbstractSaveEventListener.getEntityState(AbstractSaveEventListener.java:546): detached instance of: com.upbeat.app.skuldweb.domain.UserVO 
[TRACE] 2010-07-23 00:29:26,308 :org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:228): updating detached instance 
[TRACE] 2010-07-23 00:29:26,308 :org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:295): updating [com.upbeat.app.skuldweb.domain.UserVO#1] 
[TRACE] 2010-07-23 00:29:26,310 :org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:346): updating [com.upbeat.app.skuldweb.domain.UserVO#1] 
[TRACE] 2010-07-23 00:29:26,311 :org.hibernate.engine.Cascade.cascade(Cascade.java:138): processing cascade ACTION_SAVE_UPDATE for: com.upbeat.app.skuldweb.domain.UserVO 
[TRACE] 2010-07-23 00:29:26,312 :org.hibernate.engine.CascadingAction$5.cascade(CascadingAction.java:239): cascading to saveOrUpdate: com.upbeat.app.skuldweb.domain.UserLevelVO 
[TRACE] 2010-07-23 00:29:26,312 :org.hibernate.engine.IdentifierValue.isUnsaved(IdentifierValue.java:127): id unsaved-value: 0 
[TRACE] 2010-07-23 00:29:26,312 :org.hibernate.event.def.AbstractSaveEventListener.getEntityState(AbstractSaveEventListener.java:546): detached instance of: com.upbeat.app.skuldweb.domain.UserLevelVO 
[TRACE] 2010-07-23 00:29:26,312 :org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:228): updating detached instance 
[TRACE] 2010-07-23 00:29:26,313 :org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:295): updating [com.upbeat.app.skuldweb.domain.UserLevelVO#1] 
[TRACE] 2010-07-23 00:29:26,313 :org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:346): updating [com.upbeat.app.skuldweb.domain.UserLevelVO#1] 
[TRACE] 2010-07-23 00:29:26,313 :org.hibernate.engine.Cascade.cascade(Cascade.java:173): done processing cascade ACTION_SAVE_UPDATE for: com.upbeat.app.skuldweb.domain.UserVO 
[DEBUG] 2010-07-23 00:29:26,314 :org.apache.wicket.RequestCycle.setRequestTarget(RequestCycle.java:644): replacing request target org.apache.wicket.request.target.component.listener.ListenerInterfaceRequestTarget@676067951[Page class = com.upbeat.app.skuldweb.web.user.UserProfilePage, id = 4, version = 0]->userprofile_form->interface org.apache.wicket.markup.html.form.IFormSubmitListener.IFormSubmitListener (request paramaters: [RequestParameters componentPath=4:userprofile_form pageMapName=null versionNumber=0 interfaceName=IFormSubmitListener componentId=null behaviorId=null urlDepth=-1 parameters={email=john@upbeat.no,userprofile__form2_hf_0=} onlyProcessIfPathActive=false]) with [BookmarkablePageRequestTarget@1030849724 pageClass=com.upbeat.app.skuldweb.web.user.UserProfilePage] 

Update 2 Here's the UserVO without the getters/setters

 
@Entity 
@Table(name = "USERS") 
@NamedQueries({ 
    @NamedQuery(name = "user.getById", query = "from UserVO item where item.id = :id"), 
    @NamedQuery(name = "user.getAllUsers", query = "from UserVO item order by item.registerDate desc"), 
    @NamedQuery(name = "user.countAll", query = "select count(item) from UserVO item"), 
    @NamedQuery(name = "user.getByUsername", query = "from UserVO item where item.username = :username"), 
    @NamedQuery(name = "user.authenticate", query = "from UserVO item where item.username = :username AND item.passwordHash = :passwordHash") 
}) 
public class UserVO extends BaseVO {
 

@Id 
@GeneratedValue(strategy = GenerationType.AUTO) 
@Column(name = "ID") 
protected long id; 

@OneToOne(cascade = CascadeType.ALL) 
protected UserLevelVO userLevelVO; 

@Basic 
@Column(name = "USERNAME") 
protected String username; 

@Basic 
@Column(name = "PASSWORD_HASH") 
protected String passwordHash; 

@Basic 
@Column(name = "EMAIL") 
protected String email; 

@Temporal(TemporalType.TIMESTAMP) 
@Column(name = "REGISTER_DATE") 
protected Date registerDate; 

@Temporal(TemporalType.TIMESTAMP) 
@Column(name = "LAST_LOGIN_DATE") 
protected Date lastLoginDate; 
 

} 

Answer 1

休眠经常推迟更新直到会话被刷新。要测试您的情况是否出现问题，请在更新声明后插入getSession().flush()。

您如何管理交易？当会话被提交时，刷新会自动发生，但是如果你有一个错误的事务配置，你最终可能会提交JDBC连接，但不会提交绑定到Hibernate会话的事务。

编辑：根据您的更新，我看到了从来没有在一些一行FlushMode设置：

[TRACE] 2010-07-23 00:29:26,303 :org.hibernate.impl.SessionImpl.setFlushMode(SessionImpl.java:1316): setting flush mode to: NEVER 

我怀疑这就是问题所在。它会导致会话永远不会自动刷新 - 这通常是您想要在只读事务中执行的操作，而不是在修改数据时执行的操作。看起来你在没有事务的情况下运行（autocommit设置为true - 这不是推荐的方式）。对于OpenSessionInViewFilter的Javadoc提供了一些线索：

这个过滤器将默认不刷新Hibernate的Session，设置为FlushMode.NEVER刷新模式。它假定与关注刷新的服务层事务组合使用：在读写事务期间，活动事务管理器将临时更改刷新模式为FlushMode.AUTO，并在最后将刷新模式重置为FlushMode.NEVER的每笔交易。如果您打算在没有事务的情况下使用此过滤器，请考虑更改默认的刷新模式（通过“flushMode”属性）。

换句话说，你有两个选择：要么在你的OpenSessionInViewFilter为自动设置flushMode，或者，关闭自动提交，并配置一个事务管理器，如HibernateTransactionManager。

Answer 2

由于您使用的是Spring，我建议您使用Spring的PlatformTransactionManager来管理事务。作为事务管理的一部分，Spring会自动刷新会话。这意味着您不必担心代码中的这些方面。

Spring有一个OpenSessionInViewFilter，挂钩到事务管理器以启动/刷新会话，并且您可以使用Spring的@Transactional注释您的方法，以表明您需要针对特定​​方法的“写入”事务。这应该更新您的记录。