在Spring @Transactional方法中沒有開始交易

Question

我在使用Spring（3.0.5），Hibernate（3.6.0）和Wicket（1.4.14）開發應用程序時遇到了奇怪的問題。問題是：我無法將任何對象保存或修改爲數據庫。通過'不能'我的意思是對象的所有變化或對EntityManager.persist（foo）的調用都是簡單地，默默地忽略。選擇工作。

樣品的情況下很簡單 - 一些檢票頁我試圖保存對象到數據庫中，像如下

public class ComicDetailsPage extends PublicBasePage { 

@Override 
protected void onConfigure() { 
    System.out.println("In onConfigure"); 
    super.onConfigure(); 
    comicDAO.insert("abc"); 

} 

@SpringBean(name="comicDAO") 
private ComicDAO comicDAO; 

    (....) 

這裏是comicDAO

@Service 
public class ComicDAO { 

@PersistenceContext 
private EntityManager em; 

(...) 

@Transactional 
public void insert(String title) { 
    Comic c = new Comic(); 
    c.setTitle(title); 
    em.persist(c); 
} 

@Transactional 
public Comic add1toTitle(int pk) { 
    System.out.println("Beginning fetching"); 
    Comic c = em.find(Comic.class, pk); 
    System.out.println("Fetched updating"); 
    c.setTitle(c.getTitle()+"1"); 
    System.out.println("Updated persisting"); 
    em.persist(c); 
    System.out.println("Persisted returning"); 
    return c; 
} 

我打開日誌記錄，並在這裏是有關部分日誌（Hibernate和Spring都設置爲TRACE）。我在這裏添加了**，我認爲這很重要。

In onConfigure 
01:53:19.330 [qtp2119047503-15] DEBUG o.s.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'txManager' 
**01:53:19.330 [qtp2119047503-15] DEBUG org.hibernate.impl.SessionImpl - opened session at timestamp: 13006687993** 
**01:53:19.330 [qtp2119047503-15] DEBUG org.hibernate.transaction.JDBCTransaction - begin** 
01:53:19.330 [qtp2119047503-15] DEBUG org.hibernate.jdbc.ConnectionManager - opening JDBC connection 
01:53:19.335 [qtp2119047503-15] DEBUG org.hibernate.transaction.JDBCTransaction - current autocommit status: true 
01:53:19.335 [qtp2119047503-15] DEBUG org.hibernate.transaction.JDBCTransaction - disabling autocommit 
01:53:19.336 [qtp2119047503-15] TRACE org.hibernate.jdbc.JDBCContext - after transaction begin 
01:53:19.336 [qtp2119047503-15] DEBUG org.hibernate.impl.SessionImpl - opened session at timestamp: 13006687993 
01:53:19.336 [qtp2119047503-15] TRACE org.hibernate.impl.SessionImpl - setting flush mode to: AUTO 
01:53:19.336 [qtp2119047503-15] TRACE org.hibernate.impl.SessionImpl - setting cache mode to: NORMAL 
01:53:19.337 [qtp2119047503-15] TRACE org.hibernate.engine.IdentifierValue - id unsaved-value: 0 
01:53:19.337 [qtp2119047503-15] TRACE org.hibernate.event.def.AbstractSaveEventListener - transient instance of: pl.m4ks.comics.entity.Comic 
01:53:19.337 [qtp2119047503-15] TRACE org.hibernate.event.def.DefaultPersistEventListener - saving transient instance 
**01:53:19.338 [qtp2119047503-15] TRACE org.hibernate.event.def.AbstractSaveEventListener - saving [pl.m4ks.comics.entity.Comic#<null>]** 
**01:53:19.341 [qtp2119047503-15] DEBUG org.hibernate.event.def.AbstractSaveEventListener - delaying identity-insert due to no transaction in progress** 
01:53:19.341 [qtp2119047503-15] TRACE org.hibernate.impl.SessionImpl - closing session 
01:53:19.341 [qtp2119047503-15] TRACE org.hibernate.jdbc.ConnectionManager - connection already null in cleanup : no action 
01:53:19.341 [qtp2119047503-15] DEBUG org.hibernate.transaction.JDBCTransaction - commit 
**01:53:19.341 [qtp2119047503-15] TRACE org.hibernate.impl.SessionImpl - automatically flushing session** 
01:53:19.341 [qtp2119047503-15] TRACE org.hibernate.jdbc.JDBCContext - before transaction completion 
01:53:19.341 [qtp2119047503-15] TRACE org.hibernate.impl.SessionImpl - before transaction completion 
01:53:19.342 [qtp2119047503-15] DEBUG org.hibernate.transaction.JDBCTransaction - re-enabling autocommit 
01:53:19.342 [qtp2119047503-15] DEBUG org.hibernate.transaction.JDBCTransaction - committed JDBC Connection 
01:53:19.342 [qtp2119047503-15] TRACE org.hibernate.jdbc.JDBCContext - after transaction completion 
01:53:19.342 [qtp2119047503-15] DEBUG org.hibernate.jdbc.ConnectionManager - transaction completed on session with on_close connection release mode; be sure to close the session to release JDBC resources! 
01:53:19.342 [qtp2119047503-15] TRACE org.hibernate.impl.SessionImpl - after transaction completion 
01:53:19.342 [qtp2119047503-15] TRACE org.hibernate.impl.SessionImpl - closing session 
01:53:19.342 [qtp2119047503-15] TRACE org.hibernate.jdbc.ConnectionManager - performing cleanup 
01:53:19.342 [qtp2119047503-15] DEBUG org.hibernate.jdbc.ConnectionManager - releasing JDBC connection [ (open PreparedStatements: 0, globally: 0) (open ResultSets: 0, globally: 0)] 
01:53:19.342 [qtp2119047503-15] TRACE org.hibernate.jdbc.JDBCContext - after transaction completion 
01:53:19.342 [qtp2119047503-15] DEBUG org.hibernate.jdbc.ConnectionManager - transaction completed on session with on_close connection release mode; be sure to close the session to release JDBC resources! 
01:53:19.342 [qtp2119047503-15] TRACE org.hibernate.impl.SessionImpl - after transaction completion 

當然沒有對象被保存到數據庫中。

的最後一個文件 - 我的applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?> 
<beans (...)> 

    <context:component-scan base-package="pl.m4ks.comics"/> 
    <context:annotation-config /> 

    <bean id="dataSource" class="org.springframework.jdbc.datasource.SimpleDriverDataSource"> 
     <property name="driverClass" value="com.mysql.jdbc.Driver"/> 
     <property name="url" value="jdbc:mysql://localhost:8889/comics" /> 
     <property name="username" value="root"/> 
     <property name="password" value="root" />   
    </bean> 

    <bean id="entityManagerFactory" 
      class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
     <property name="persistenceUnitName" value="main" /> 
     <property name="dataSource" ref="dataSource" /> 
    </bean> 

    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> 
     <property name="dataSource"> 
      <ref bean="dataSource"/> 
     </property> 
     <property name="packagesToScan"> 
      <value>pl.m4ks.comics</value> 
     </property> 
    </bean> 


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

    <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" /> 

    <tx:annotation-driven transaction-manager="txManager" proxy-target-class="true"/> 
</beans> 

我不知道有什麼可以是問題，以及如何解決它。我不想在我的代碼中管理事務 - 這就是Spring的用處。

Answer 1

a）您正在定義既一個Hibernate SessionFactory和JPA EntitymanagerFactory。這將是什麼？可以使用Hibernate的Session API或JPA的Entitymanager API作爲提供者，但不能同時使用兩者。

b）您已經定義了一個HibernateTransactionManager，但因爲你在你的代碼中使用EntityManager，你需要一個JpaTransactionManager來代替：

<bean id="myTxManager" class="org.springframework.orm.jpa.JpaTransactionManager"> 
    <property name="entityManagerFactory" ref="myEmf"/> 
</bean 

---

這是你的applicationContext.xml的註釋版本：

<?xml version="1.0" encoding="UTF-8"?> 
<beans (...)> 

    <context:component-scan base-package="pl.m4ks.comics"/> 
    <context:annotation-config /> 

    <bean id="dataSource" 
    class="org.springframework.jdbc.datasource.SimpleDriverDataSource"> 
     <property name="driverClass" value="com.mysql.jdbc.Driver"/> 
     <property name="url" value="jdbc:mysql://localhost:8889/comics" /> 
     <property name="username" value="root"/> 
     <property name="password" value="root" />   
    </bean> 

    <!-- use either this: --> 
    <bean id="entityManagerFactory" 
    class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
     <property name="persistenceUnitName" value="main" /> 
     <property name="dataSource" ref="dataSource" /> 
    </bean> 

    <!-- or this --> 
    <bean id="sessionFactory" 
    class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> 
     <property name="dataSource"> 
      <ref bean="dataSource"/> 
     </property> 
     <property name="packagesToScan"> 
      <value>pl.m4ks.comics</value> 
     </property> 
    </bean> 
    <!-- (but not both) --> 

    <!-- this is correct for AnnotationSessionFactoryBean, but not if you use 
     LocalContainerEntityManagerFactoryBean --> 
    <bean id="txManager" 
    class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
     <property name="sessionFactory"> 
      <ref bean="sessionFactory" /> 
     </property> 
    </bean> 

    <!-- not necessary, <context:annotation-config /> automatically includes this --> 
    <bean 
    class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" /> 

    <tx:annotation-driven transaction-manager="txManager" proxy-target-class="true"/> 
</beans> 

---

還有一個設計說明：DAO不應該是事務性的。您應該使用管理交易的服務層。請參閱this question（和許多其他）以供參考。

Answer 2

你需要調用EntityManager的

flush()

以下方法來進行實際保存在數據庫

Answer 3

您是否嘗試過在hibernate配置中設置hibernate.connection.autocommit = true？這將解決問題。但是這種方法的有效性是你必須弄清楚的。