How to ?

[anand1975]

Hi Friends,


Ihave three methods which has to be called in one transaction from three different DAO's


method 1 addUsers() from UsersDaoImpl
method 2 addUserNgroups() from UserNGroupDaoImpl
method 3 addUserNRole() from UserNRoleDaiImpl

Thje transaction management is as follows for UsersDaoImpl.

	<!-- dceUserDAO config starts here  -->
	<bean id="dceUserDAO"
		class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
		<property name="transactionManager">
			<ref bean="transactionManager" />
		</property>
		<property name="target">
			<ref bean="dceUserDAOTarget" />
		</property>
		<property name="transactionAttributes">
			<!-- define the transaction specs here -->
			<props>
				<prop key="addGroupSafe">PROPAGATION_REQUIRED</prop>

			</props>
		</property>
	</bean>
	<bean id="dceUserDAOTarget"
		class="com.nucleus.dce.dao.hibernate.DceUsersDAOImpl">
		<property name="sessionFactory">
			<ref bean="sessionFactory" />
		</property>
	</bean>

Similarli the other two DAO's are configured seperately

Plz help in this regard

Thanks & Regards,
S.Anand mohan

[Marten Deinum]

Normally you want to define your transactions on the Service layer and not on yuor database layer. that way your business method is transactional. So pull-up your transaction demarcation one level from dao to service.

[anand1975]

Hi mdenium,

Normally you want to define your transactions on the Service layer and not on yuor database layer. that way your business method is transactional. So pull-up your transaction demarcation one level from dao to service.

Plz guide me, whether I am in the right track or not..

suppose I have a bean RegistrationController.java of the service layer, in which I am calling the three methods then I have to configure

	<bean id="regController"
		class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
		<property name="transactionManager">
			<ref bean="transactionManager" />
		</property>
		<property name="target">
			<ref bean="regControllerTarget" />
		</property>
		<property name="transactionAttributes">
			<!-- define the transaction specs here -->
			<props>
				<prop key="addGroupSafe">PROPAGATION_REQUIRED</prop>

			</props>
		</property>
	</bean>
	<bean id="regControllerTarget"
		class="MyPackage.RegistrationController">
		<property name="sessionFactory">
			<ref bean="sessionFactory" />
		</property>
	</bean>

Thanks & Regards,
S. Anand Mohan.

[karldmoore]

Yes that should work, one reservation is that if this controller is a MVC style one you might have problems. Where is the controller called from?
http://www.martinfowler.com/eaaCatal...viceLayer.html
http://www.springframework.org/docs/...decl-explained