Spring Transaction using AOP in EJB Project

[gokul maha]

Hi,

My application has only EJB project and no Web tier.
I want to implement spring declarative transaction management using AOP.
How to load the spring context xml?

Thanks in advance,
Gokul

[Mark Spritzler]

Unfortunately, the only solution with EJBs is to have your EJBs extend the Spring class that makes EJB Spring App Context aware.

Good Luck

Mark

[gokul maha]

I am NOT using EJBs (Session beans) for Transaction Management. I want to use Spring POJO Declarative Transaction Management using AOP. Only entry point to the application is MDB.
Since there is not web project, I am not sure how to load the application context xml where the transaction attributes are defined and let the container be aware of it.

<bean id="sampleManager" class="test.SampleManager">
<property name="dataAccessor" ref ="dataAccessor"/>
<property name="dataSource">
<ref local="dataSource"/>
</property>
</bean>

<tx:advice id="txAdvice" transaction-manager="txManager">
<tx:attributes>
<tx:method name="get*" read-only="true"/>
<tx:method name="*" propagation = "REQUIRED"/>
</tx:attributes>
</tx:advice>

<aop:config>
<aop:pointcut id="testOp" expression="execution(* test.SampleInterface.*(..))"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="testOp"/>
</aop:config>

<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>

SampleManager implements SampleInterface.


Could you please help on this? Thanks.

[Vivek K Singh]

you can try this, have a web.xml and define a servlet in it like:

 <servlet>
  <servlet-name>Init</servlet-name>
  <servlet-class>my.package.Main</servlet-class>
  <load-on-startup>0</load-on-startup>
 </servlet>

then define a main class like:

public class Main implements javax.servlet.Servlet {

public void initialise() {
		try {
			ctx = new ClassPathXmlApplicationContext("spring-resource-folder/my-spring-applicationContext.xml");
		} catch (Throwable e) {
			e.printStackTrace(System.err);
			destroy();
		}
	}

public void destroy() {
		try {
			if (ctx != null) {
				ctx.close();
			}
			ctx = null;
		} catch (Throwable e) {
			e.printStackTrace(System.err);
		}
	}
}

[gokul maha]

Thanks Vivek. But want to know, Can we use web.xml in EJB project?
How this web.xml will be triggered. I dont have any web module/project at all. My application is triggered using MDB.

[Vivek K Singh]

yes you can do that: http://www.eclipse.org/webtools/community/tutorials/ejbtutorial/buildingejbs.html

Also, there are other ways to do this as well. You can have a main method to load the Spring beans. Where to trigger it from can be a bit tricky...

[gokul maha]

Thanks. I will try this option.
Once loaded using the above method, the container will take care of the transaction using the attributes in the context xml right ?

[Vivek K Singh]

yeah it will...