No Hibernate Session bound to thread with hibernate3

[edbras]

Hellu,

I just changed my application such that i uses hibernate 3.0 and Springframework 1.2.5.
I only get the exeption that my hibernate session isn't bound to a thread when I use it in the following way:
I have a Service layer that talk to DAO's.
In the DAO, I have:

    private SessionFactory sessionFactory;

    public SessionFactory getSessionFactory() {
        return sessionFactory;
    }

Just like explained in the new Springframework manual, and in the method:

                this.sessionFactory.getCurrentSession();

before using the session to look up something in the db. This is how I understood it from the manual.
When I call this method above, I get this hiberate exception, telling me that no session is bound.
Just before I get the exception i get the following logging:

DEBUG org.springframework.orm.hibernate3.SessionFactoryUtils - Opening Hibernate Session
DEBUG org.springframework.orm.hibernate3.SessionFactoryUtils - Closing Hibernate Session

I then noticed, though some debubbing, that I do have a NEW session, but that the following method (in SessionFactoryUtils) returns false:

                  isSessionTransactional(session, sessionFactory)

This method will look if I have a current session bound to my thread.
So that means that I do have a NEW session but no current session and so notransaction. Is this correct? and Why not ?


Below you find the important parts from the beans.xml file.
Please some help.
I noticed that the getCurrentSession() method is not allowed to create a new session and it looks up the session bound to the current transaction. So basically the current transaction must first already have created a session. But where and how??...do I make sure this happens..??... I would suppose throught the correct transaction configuration in the beans.xml below... but appearantly... it's enough... or it contains a mistake...

Cheers,
Ed Bras

<!-- The hibernate session factory -->
   <bean id="HibernateSessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
       <property name="mappingResources">
           <list>
               <value>MrMain.hbm.xml</value>
               <value>MrMainProperty.hbm.xml</value>
               <value>MrProperty.hbm.xml</value>
               <value>MrPropertyKey.hbm.xml</value>
               <value>MrRelated.hbm.xml</value>
               <value>MrRelatedProperty.hbm.xml</value>
               <value>MrDbQueries.hbm.xml</value>
           </list>
       </property>
       <property name="hibernateProperties">
           <props>
               <prop key="hibernate.dialect">
               		org.hibernate.dialect.MySQLDialect
               	</prop>
				<prop key="hibernate.connection.pool_size">
					3
				</prop>
				<prop key="hibernate.show_sql">
					true
				</prop>								
				<prop key="hibernate.connection.isolation">
					2
				</prop>								
           </props>
       </property>
       <property name="dataSource">
           <ref bean="DataSource"/>
       </property>
   </bean>

	<!-- The main dao implementation that does the real work -->
	<bean id="MainDao" class="org.ited.mr.persist.dao.impl.BasicMainDao">
		<property name="sessionFactory">
			<ref local="HibernateSessionFactory"/>
		</property>
        <property name="mainCls">
            <ref bean="MrMain"/>
        </property>
        <property name="persistUtility">
            <ref bean="PersistUtility"/>
        </property>
	</bean>


	<!-- The backend service -->
    <bean id="Service" 
    	class="org.ited.mr.service.impl.BasicService">
        <property name="mainDao">
            <ref bean="MainDao"/>
        </property>
        <property name="relatedDao">
            <ref bean="RelatedDao"/>
        </property>
        <property name="dtoConverter">
            <ref bean="DtoConverter"/>
        </property>
        <property name="ctxUtils">
            <ref bean="ContextUtility"/>
        </property>
        <property name="mainCls">
            <ref bean="Main"/>
        </property>
        <property name="relatedCls">
            <ref bean="Related"/>
        </property>
    </bean>

	<!-- Transaction demarcation of the backend service -->
   <bean id="BackendServiceProxy" 
        class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
        <property name="transactionManager">
            <ref bean="TransactionManager"/>
        </property>
        <property name="target">
            <ref bean="Service"/>
        </property>
        <property name="transactionAttributes">
            <props>
                <prop key="*">PROPAGATION_REQUIRED</prop>
            </props>
        </property>
    </bean>

[katentim]

Is the SessionFactory in:

private SessionFactory sessionFactory;

of type

org.hibernate.SessionFactory

instead of

net.sf.hibernate.SessionFactory

[edbras]

Thanks for the quick response.

The answer: yes the sessionfactory if of type org.hibernate.SessionFactory.

Appearantly I don't have a transaction when entering my DAO, which should be the case.

[edbras]

Hellu there,

I got it working with a Interceptor.
But I still think there is something wrong, as it should also work as listed below.
So I hope someone can have a look at it, as maybe it's a little bug, as I got it working before!

What I have no, is the configuration like listed in the manual with an interceptor:

So the code is the same, but the beans.xml contains the following.
Note that the transaction manager and session factory beans are unchanged. I now talk to the service proxy bean in my code.

  <bean id="TransactionInterceptor"
      class="org.springframework.transaction.interceptor.TransactionInterceptor">
    <property name="transactionManager">
		<ref bean="TransactionManager"/>
    </property>
    <property name="transactionAttributeSource">
      <value>
        com.ited.mr.service.intf.IService.*=PROPAGATION_REQUIRED
      </value>
    </property>
  </bean>

  <bean id="ServiceProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
    <property name="proxyInterfaces">
      <value>com.ited.mr.service.intf.IService</value>
    </property>
    <property name="interceptorNames">
      <list>
        <value>TransactionInterceptor</value>
        <value>Service</value>
      </list>
    </property>
  </bean>

Cheers,
Ed

[sh8d0w]

I'm also getting the same error. Is this confirmed to be a bug or was there a configuration problem?

[cdeszaq]

I recently ran into the exact same sort of error, and beat my head against the wall trying to figure out what the problem was.

In my case, I was using the `OpenSessionInViewFilter` configured in the `web.xml` file, along with the Spring Security configuration there as well.

Since both Spring Security and `OpenSessionInViewFilter` are filters, the order in which they are applied depends on the order they appear in the `web.xml` file.

In my case, I initially had the `OpenSessionInViewFilter` below the Spring Security filter. Once I swapped their positions (ie. put the `OpenSessionInViewFilter` above the Spring Security one), everything worked just fine!