Trying to get a reference to a dao interface

[Dave Townsend]

I've have a web application deployed in web logic 8.1 that uses iBaits and Spring and cannot figure out how to get a reference to the dao interface called "Confirmation' from my business class without doing this in each class that needs to use the dao:

Confirmation conf;

ApplicationContext context = 
		new ClassPathXmlApplicationContext(applicationContext.xml);
	 conf = (Confirmation)context.getBean("confirmation");

Do I need to do it this way? I was hoping I wouldn't have to write that out.

I thought if I loaded the applicationContext with ContextLoaderServlet via web.xml I could just use setter injection to get the handle to the dao interface in my ConfirmationManager class and start calling dao methods but it is null when I try to use it so its not working.

I'm new to Spring so any help would be appreciated. Thanks

web.xml

<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/applicationContext.xml</param-value>
	</context-param>
	
	<servlet>
		<servlet-name>context</servlet-name>
		<servlet-class>org.springframework.web.context.ContextLoaderServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>

applicationContext.xml

   <bean id="confirmation" class="com.company.booking.ConfirmationRepository">
      <property name="dataSource" ref="dataSource" />
      <property name="sqlMapClient" ref="sqlMapClient" />
    </bean>
    
    <tx:advice id="txAdvice" transaction-manager="txManager">
      <tx:attributes>
      	<tx:method name="get*" read-only="true"/>
      	<tx:method name="*"/>
      </tx:attributes>
    </tx:advice>
	
	<aop:config>
      <aop:pointcut id="confirmationOperation" expression="execution(* com.company.booking.Confirmation.*(..))"/>
	  <aop:advisor advice-ref="txAdvice" pointcut-ref="confirmationOperation"/>
	</aop:config>
	
	<jee:jndi-lookup id="dataSource" jndi-name="jdbc/VCSCDataSource" cache="true" />
	
	<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
      <property name="dataSource" ref="dataSource"/>
    </bean>
	
    <bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
        <property name="configLocation" value="/WEB-INF/SqlMapConfig.xml" />
        <property name="dataSource" ref="dataSource" />
    </bean>
    
	<bean id="nativeJdbcExtractor" class="org.springframework.jdbc.support.nativejdbc.SimpleNativeJdbcExtractor" 
		lazy-init="true"/>

	<bean id="oracleLobHandler" class="org.springframework.jdbc.support.lob.OracleLobHandler" lazy-init="true">
		<property name="nativeJdbcExtractor" ref="nativeJdbcExtractor"/>
	</bean>
    
    <bean id="confirmationManager" class="com.company.booking.ConfirmationManager">
    	<property name="conf" ref="confirmation" />
    </bean>
</beans>

Confirmation interface

public interface Confirmation {
  
  public void archiveConfimationMessage(ConfirmationArchive archive);

ConfirmationManager code snippet

private Confirmation conf;

public void setConf(Confirmation conf) {
  this.conf = conf;
}

-- calling this gets a null pointer since data is null --
 public void archiveConfimationMessage(ConfirmationArchive archive) {
	conf.archiveConfimationMessage(archive);
  }

Was hoping setter injection would give me a handle to conf. Not sure what im doing wrong.

[Dave Townsend]

found the issue. the setter injection is working properly. after initialization the class is being created again by a caller so the injected class is now null. not sure how to fix that yet.

[karldmoore]

after initialization the class is being created again by a caller so the injected class is now null. not sure how to fix that yet.

If you add some more details that might help to solve it.