In our SessionFactories we specify our datasource, our entity classes, and also our hibernate properties.
Since we are using multiple databases, in this case 2 databases, we need to create two SessionFactory configurations.
Here is our first SessionFactory config that we place in applicationcontext.xml:
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>com.endurotracker.gwt.model.Users</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.connection.isolation">3</prop>
<prop key="hibernate.current_session_context_class">jta</prop>
<prop key="hibernate.transaction.factory_class">com.endurotracker.gwt.transaction.AtomikosJTATransactionFactory</prop>
<prop key="hibernate.transaction.manager_lookup_class">com.atomikos.icatch.jta.hibernate3.TransactionManagerLookup</prop>
</props>
</property>
</bean>
Here is our second SessionFactory config that we place in applicationcontext.xml:
<!--Hibernate SessionFactory2-->
<bean id="sessionFactory2"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource2" />
<property name="annotatedClasses">
<list>
<value>com.endurotracker.gwt.model.Activitytype</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.connection.isolation">3</prop>
<prop key="hibernate.current_session_context_class">jta</prop>
<prop key="hibernate.transaction.factory_class">com.endurotracker.gwt.transaction.AtomikosJTATransactionFactory</prop>
<prop key="hibernate.transaction.manager_lookup_class">com.atomikos.icatch.jta.hibernate3.TransactionManagerLookup</prop>
</props>
</property>
</bean>
You will notice that we have 2 hibernate properties related to transactions:
hibernate.transaction.factory_class and hibernate.transaction.manager_lookup_class.
Due to a Hibernate bug ( bug HHH-3110), we had to create the following class which we reference as com.endurotracker.gwt.transaction.AtomikosJTATransactionFactory, so you can take this code and create your own class as well and update this property to your class name:
public class AtomikosJTATransactionFactory extends JTATransactionFactory{
UserTransaction userTransaction;
@Override
protected UserTransaction getUserTransaction() {
if (this.userTransaction == null)
{
this.userTransaction = new UserTransactionImp();
}
return this.userTransaction;
}
}
In Part 4, we will configure our Atomikos Transaction Manager via Atomikos' Transaction beans, and talk about how to use @Transactional Annotations in our Data Access layer and Controller layer. In Part 5, we will setup some unit tests using JUnit 4 and Spring's unit testing Annotations.
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