java Spring @Transactional 方法中没有事务启动
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No transaction starts within Spring @Transactional method
提问by M4ks
I run into strange problem while developing application using Spring (3.0.5), Hibernate (3.6.0) and Wicket (1.4.14). The problem is: i cannot save or modify any object into database. By 'cannot' I mean that all changes in object or calls to EntityManager.persist(foo) are simply, silently ignored. Selects work.
我在使用 Spring (3.0.5)、Hibernate (3.6.0) 和 Wicket (1.4.14) 开发应用程序时遇到了奇怪的问题。问题是：我无法将任何对象保存或修改到数据库中。“不能”是指对象中的所有更改或对 EntityManager.persist(foo) 的调用都被简单地、静默地忽略。选择工作。
Sample case is simple - on some wicket page i try to save object into database, like follows
示例案例很简单 - 在某些检票口页面上，我尝试将对象保存到数据库中，如下所示
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;
(....)
Here is comicDAO
这是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;
}
I turned on logging and here is relevant part of logs (both Hibernate and Spring are set to TRACE). I added ** to lines I think are important here.
我打开了日志记录，这是日志的相关部分（Hibernate 和 Spring 都设置为 TRACE）。我将 ** 添加到我认为在这里很重要的行中。
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
Of course No object is saved into database.
当然没有对象被保存到数据库中。
The last file - my applicationCOntext.xml
最后一个文件 - 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>
I have no idea what can be the problem and how to solve it. I don't want to manage transaction in my code - this is what Spring is for.
我不知道可能是什么问题以及如何解决它。我不想在我的代码中管理事务 - 这就是 Spring 的用途。
回答by Sean Patrick Floyd
a) You are defining both a Hibernate SessionFactoryand a JPA EntitymanagerFactory. Which is it going to be? Either use Hibernate's Session API or JPA's Entitymanager API with Hibernate as provider, but not both.
a) 您正在定义 HibernateSessionFactory和 JPA EntitymanagerFactory。它会是哪个？使用 Hibernate 的 Session API 或 JPA 的 Entitymanager API 和 Hibernate 作为提供者，但不能同时使用两者。
b) You have defined a HibernateTransactionManager, but since you are using EntityManagerin your code, you need a JpaTransactionManagerinstead:
b) 您已经定义了 a HibernateTransactionManager，但由于您EntityManager在代码中使用，因此您需要一个JpaTransactionManager：
<bean id="myTxManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="myEmf"/>
</bean
Here's a commented version of your applicationContext.xml:
这是 applicationContext.xml 的注释版本：
<?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>
And a design note: DAOs shouldn't be transactional. You should use a service layer that manages the transactions. See this question(and many others) for reference.
还有一个设计说明：DAO 不应该是事务性的。您应该使用管理事务的服务层。请参阅此问题（以及许多其他问题）以供参考。
回答by Ravi
Have you tried setting hibernate.connection.autocommit=true in hibernate config? That would solve the problem. But how efficient the approach is what you have to figure out.
您是否尝试过在休眠配置中设置 hibernate.connection.autocommit=true ？这样问题就解决了。但是，您必须弄清楚这种方法的效率如何。
