Injecting objs via Spring in non-web application

[isaw]

Hey guys, Spring newbie here.

Ok. I have successfully written up some code in a web based application under WAS using Spring and Hibernate. I had Spring inject a DAO into the relevant objects that needed it. I defined a datasource in my spring xml file (jndi via WAS), setup the hibernate props, defined my sessionFactory and DAO beans, etc. And it works/ed fine. In my class I could have:

	private IADataObjectService iaDataObjectService;

	public void setIaDataObjectService(IADataObjectService service) {
		iaDataObjectService = service;
	}

And then use that service to do my db dirty work.

Now I need to do the same thing, but in a stand alone Java app. The app in question is a multi-threaded app, running 24/7. I wrote up some test code in a test class to try and figure out the basics:

           ApplicationContext ac = new ClassPathXmlApplicationContext(getConfigLocations());
            IADataObjectDAO iaDataObjectDAO = (IADataObjectDAO) ac.getBean("IADataObjectDAO");
            Session session = iaDataObjectDAO.getHibernateSession();
            System.out.println(this.getClass() + "::session open : " + session.isOpen());
            System.out.println(this.getClass() + "::session connected : " + session.isConnected());
            session.close();
            System.out.println(this.getClass() + "::session open : " + session.isOpen());

And this works. Now the thing is, various classes need to have db connectivity. And I don't want to have to implement the code above in each class. I wanted to have each class, upon initialization, to have it's defined iaDataObjectDAO set via Spring.

But I cannot see how to do this without the use of the web server environment. Does anyone have any examples or a link to a similar problem (in a stand alone app)? I'd greatly appreciate it.

Thanks

Oh - here's my current XML file.

	<bean id="dataSource"
		class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName">
			<value>com.ibm.db2.jcc.DB2Driver</value>
		</property>
		<property name="url">
			<value>myurl</value>
		</property>
		
		<property name="username">
			<value>user</value>
		</property>
		
		<property name="password">
			<value>name</value>
		</property>
	</bean>
	
	<!--Hiberate session factory setup -->
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="dataSource">
			<ref bean="dataSource"/>
		</property>
			</bean>
	
	
	<!-- Transaction manager for a single Hibernate SessionFactory &#40;alternative to JTA&#41; -->
	<bean id="transactionManager"
		class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory">
			<ref bean="sessionFactory"/>
		</property>
	</bean>
	
	<bean id="IADataObjectDAO"
		class="com.test.HibernateIADataObjectDAO">
		<property name="sessionFactory">
			<ref bean="sessionFactory"/>
		</property>
	</bean>
	
	
	<!-- the IADataObjectServiceTarget links to the IADataObjectDAO bean above -->
	<bean id="IADataObjectServiceTarget"
		class="com.test.IADataObjectServiceImpl">
		<property name="iaDataObjectDAO">
			<ref bean="IADataObjectDAO"/>
		</property>
	</bean>
	
	
	<!-- the IADataObjectService links to the IADataObjectServiceTarget bean above -->
	<bean id="IADataObjectService"
		class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
		<property name="transactionManager">
			<ref bean="transactionManager"/>
		</property>
		<property name="target">
			<ref local="IADataObjectServiceTarget"/>
		</property>
		<property name="transactionAttributes">
			<props>
				<prop key="save*">PROPAGATION_REQUIRED</prop>
				<prop key="remove*">PROPAGATION_REQUIRED</prop>
				<prop key="*">PROPAGATION_REQUIRED</prop>
			</props>
		</property>
	</bean>
	
	<!-- MODEL DEFINITIONS -->
	
	<!-- list out the specific classes where the data access service is to be injected upon class creation -->
	<bean id="SpringTestInjector"
		class="com.test.SpringTestInjector">
		<property name="iaDataObjectService">
			<ref bean="IADataObjectService"/>
		</property>
	</bean>

[jbetancourt]

I don't see what the problem is. Since its a stand alone app, you have an entry point, like main(), so that main can load the app context in a "singleton" manner, and all the classes you need can be in that context, with their dataSource and other related objects injected.

Sorry if I mis interpreted the question and provided a bad response.

[isaw]

Hmm,

I see what you mean. I thought I had done that. In my main method I have that chunk of code. I then initialize another class that is described and detailed in the model.xml file. But the DAO interface reference variable is not "injected". It's always null.

I'll have to have a play with this.


Thanks!