Question

I have created two transaction managers(one for READ requests and another for READ-WRITE requests) and two session factories for the same.

Important snippets are as follows:

<tx:annotation-driven />

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

<bean id="txManagerRead"
    class="org.springframework.orm.hibernate3.HibernateTransactionManager">
    <property name="sessionFactory" ref="SessionFactory" />
    <qualifier value="READ"/>
</bean>

<bean id="txManagerWrite"
    class="org.springframework.orm.hibernate3.HibernateTransactionManager">
    <property name="sessionFactory" ref="Session1" />
     <qualifier value="WRITE"/>
</bean>

<bean id="AbstractSessionFactory"
    class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"
    abstract="true">
    <property name="annotatedClasses">
        <list>
.....
....
        </list>
    </property>
    <property name="exposeTransactionAwareSessionFactory">
        <value>true</value>
    </property>
</bean>

<bean id="SessionFactory"
    class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"
    parent="AbstractSessionFactory">
    <property name="hibernateProperties">
        <props>
.........
.........
</props>
</property>
</bean>



<bean id="SessionFactory1"
    class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"
    parent="AbstractSessionFactory">
    <property name="hibernateProperties">
        <props>
.........
.........
</props>
</property>
</bean>

The moment I am trying to create a bean for DAO, like:

<bean id="configurationDAO" class="com.amazon.im.dao.hibernate.ConfigurationDAOImpl">
  <property name="sessionFactory" ref="SessionFactory" />
</bean>

I am getting BeanCreationException with following error message:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘configurationDAO’: Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: public org.hibernate.SessionFactory com.amazon.im.dao.hibernate.GenericDAOImpl.sessionFactory; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [org.hibernate.SessionFactory] is defined: expected single matching bean but found 2: [SessionFactory, SessionFactory1]

I cannot use LocalSessionFactoryBean because I want to use “annotatedClasses” property.

Any pointers on why is it happening?
Is there anything missing from my side?

Answer 1

It look like the sessionFactory property of your GenericDAOImpl class (which I assume is the superclass of ConfigurationDAOImpl?) is annotated with @Autowired. This won’t work because it has two session factories to choose from. Also, you’re manually injecting the correct session factory using <property>, so the @Autowired isn’t necessary.