No transaction starts within Spring @Transactional method

Question

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

Answer 1

a) You are defining both a Hibernate SessionFactory and 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.

b) You have defined a HibernateTransactionManager, but since you are using EntityManager in your code, you need a JpaTransactionManager instead:

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

---

Here's a commented version of your 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>

    <!-- 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.

Answer 2

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.

Answer 3

you need to call following method on EntityManager

flush()

To make actual save in database