Summary: the Exception is telling me that the transaction is read-only; a debug println seems to indicate that I'm not in read-only mode.
Classes edited for internet publishing - sorry if I mistyped something but this is the jist of the code giving me problems. saveOrUpdate works when called on other object types but not on this one. I added the println to saveOrUpdate as I was debugging. I didn't write the abstract class, I'm just trying to use it (and now debug it).
Relevant output below code. Not sure where to go from here.
Update after investigation: I have also been in the middle of doing some updates to the spring config and a coworker pointed out that one method I called updateAParameter from was using spring in one way, and the broken method was using it in another way. Unfortunately the broken way is the way I was trying to get to.
So the problem as I now understand it is that if I instantiate the DataObjectDAOImpl "manually" in a method by getting a bean, then it allows me to write back to Hibernate correctly. If I use spring to set a class variable for that bean so I don't have to instantiate it in every method, then the InvalidDataAccessApiUsageException occurs when I access a method that tries to write to Hibernate, despite the fact that it reports not being in read-only mode. My coworker had a theory on this topic but I didn't understand what he was trying to say - something about extracting an interface from the SampleClass.
// Old way that works.
public class SampleClass {
public void someMethod {
ApplicationContext ac = ApplicationContextFactory.getApplicationContext();
DataObjectDAOImpl dodi = ((DataObjectDAOImpl) ac.getBean("dodi"));
//this works
dodi.updateAParameter("foo", exampleDataObject);
}
}
//New way that doesn't work but I would like it to.
public class SampleClass {
private DataObjectDAOImpl dodi = null;
//'dodi' has getter and setter methods that I am not pasting here for simplicity
public void someMethod {
//causes Exception
dodi.updateAParameter("foo", exampleDataObject);
}
}
and here is relevant bean from the spring config
<bean id="sampleclass" class="com.service.SampleClass" scope="prototype">
<property name="dodi" ref="doDAOimpl"/>
</bean>
here is the DAOImpl which is the same for the old and new way
public class DataObjectDAOImpl extends AbstractSpringDaoStuff {
...
public void updateAParameter(String parameter, DataObject do) {
do.setAParameter(parameter);
super.saveOrUpdate(do);
}
}
public abstract class AbstractSpringDaoStuff extends HibernateDaoSupport {
...
@Transactional(readOnly=false)
protected void saveOrUpdate(Object obj) {
System.out.println ( "Read-only?: " + TransactionSynchronizationManager.isCurrentTransactionReadOnly () );
getHibernateTemplate().saveOrUpdate(obj);
}
}
Output from the app server:
[java] Read-only?: false
[java] - Method execution failed:
[java] org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.NEVER/MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.
[java] at org.springframework.orm.hibernate3.HibernateTemplate.checkWriteOperationAllowed(HibernateTemplate.java:1186)
[java] at org.springframework.orm.hibernate3.HibernateTemplate$16.doInHibernate(HibernateTemplate.java:750)
[java] at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:419)
[java] at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
[java] at org.springframework.orm.hibernate3.HibernateTemplate.saveOrUpdate(HibernateTemplate.java:748)
[java] at com.est.dao.AbstractSpringDaoStuff.saveOrUpdate(AbstractSpringDaoMDA.java:24)
etc