Injection Problem

[Milesy]

My project consists of these basics.

1. WAR for my web app.
2. JAR for my business layer.
3. Packaged up into an EAR
In my business layer JAR I have declared /META-INF/spring/applicationContext.xml

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN"
        "http://www.springframework.org/dtd/spring-beans-2.0.dtd">

<beans>
    <bean id="businessFacade" 
             class="business.facade.BusinessFacadeImpl"/>
</beans>

In my web app WAR I have declared /WEB-INF/spring/applicationContext.xml

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN"
		  "http://www.springframework.org/dtd/spring-beans-2.0.dtd">

<beans>

    <bean id="categoriesTag" class="web.struts2.tags.CategoriesTag">
        <property name="businessFacade">
            <ref bean="businessFacade"/>
        </property>
    </bean>
</beans>

In my web app I have the following web.xml

<web-app>
    <display-name>Web App</display-name>

    <filter>
        <filter-name>Struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.FilterDispatcher
        </filter-class>
    </filter>

    <filter-mapping>
        <filter-name>Struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- Struts Tag Library Descriptors -->
    <taglib>
        <taglib-uri>/struts-tags</taglib-uri>
        <taglib-location>/WEB-INF/struts-tags.tld</taglib-location>
    </taglib>

    <listener>
        <listener-class>
            org.springframework.web.context.ContextLoaderListener
        </listener-class>
    </listener>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/spring/applicationContext.xml
            classpath:/META-INF/spring/applicationContext.xml
        </param-value>
    </context-param>
</web-app>

Problem

When I deploy the application the injection setter within CategoriesTag setBusinessFacade is called, and passed a valid instance of the Business Facade.

When I use the tag class within my JSP I get a null pointer exception telling me the business facade is null, which means this is a completely different instance.

What do I need to do to get the Spring created instance in my wep app?

Thanks

[Marten Deinum]

The only way to access spring classes in a Tag is to look them up, you cannot inject them. Tags are instantiated and destroyed by the servlet container they live outside the scope of the ApplicationContext.