I have an abstract super class bean called FooBean and all of my other beans extend this class. I have wired up my dao in applicationContext files and I want to inject it into this superclass bean so that every time I am inside of a bean, I have access to the dao. The problem is, I get a NullPointerException whenever I try to access the dao in a subclass. The following files show only the relevant config details for spring setup:
web.xml:
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<listener>
<listener-class>
org.springframework.web.context.request.RequestContextListener
</listener-class>
</listener>
<context-param>
<description>Spring configuration files location.</description>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/config/applicationContext-*.xml</param-value>
</context-param>
faces-config.xml:
<application>
<variable-resolver>org.springframework.web.jsf.DelegatingVariableResolver</variable-resolver>
<el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>
...
</application>
FooBean.java:
public abstract class FooBean implements Serializable {
protected transient FooService dao;
public void setFooService(FooService dao){
this.dao = dao;
}
}
applicationContext-service.xml:
<bean id="serviceTemplate" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" abstract="true">
<property name="transactionManager" ref="transactionManager"/>
<property name="transactionAttributes">
<props>
<prop key="*"/>
<!--
<prop key="save*">PROPAGATION_REQUIRED</prop>
<prop key="delete*">PROPAGATION_REQUIRED</prop>
<prop key="remove*">PROPAGATION_REQUIRED</prop>
<prop key="find*">PROPAGATION_REQUIRED,readOnly</prop>
<prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>
-->
</props>
</property>
</bean>
<!-- Definition of service targets -->
<bean id="fooServiceTarget" class="com.foo.service.FooService">
<property name="fooDAO" ref="fooDAO"/>
<property name="adminDAO" ref="adminDAO"/>
<property name="channelsDAO" ref="channelsDAO"/>
</bean>
<bean id="fooService" parent="serviceTemplate">
<property name="target" ref="fooServiceTarget"/>
</bean>
applicationContext-hibernate.xml:
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="jdbc/FooDataSource"/>
</bean>
<!-- Hibernate SessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mappingResources">
<list>
<!--value>com/Foo/model/General.hbm.xml</value-->
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.bytecode.use_reflection_optimizer">true</prop>
<prop key="hibernate.search.default.directory_provider">filesystem</prop>
<prop key="hibernate.search.default.indexBase">/usr/lucene/indexes</prop>
<!--prop key="hibernate.cache.provider_class">org.hibernate.cache.SwarmCacheProvider</prop-->
</props>
</property>
</bean>
<!-- Transaction manager for a single Hibernate SessionFactory (alternative to JTA) -->
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<!-- Spring Data Access Exception Translator Defintion -->
<bean id="jdbcExceptionTranslator" class="org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator"/>
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory" ref="sessionFactory"/>
<property name="jdbcExceptionTranslator" ref="jdbcExceptionTranslator"/>
</bean>
<!-- Add DAO's here and create separate application context for service -->
<bean id="FooDAO" class="com.foo.service.dao.impl.FooDAOHibernate">
<property name="hibernateTemplate" ref="hibernateTemplate"/>
</bean>
<bean id="adminDAO" class="com.foo.service.dao.impl.AdminDAOHibernate">
<property name="hibernateTemplate" ref="hibernateTemplate"/>
</bean>
<bean id="channelsDAO" class="com.foo.service.dao.impl.ChannelsDAOHibernate">
<property name="hibernateTemplate" ref="hibernateTemplate"/>
</bean>
Things I already tried with no success:
- Tried using @ManagedProperty(value="#{FooService}") on the FooBean class field.
Tried defining a bean in faces-config.xml to inject the spring bean:
com.foo.beans.FooBean none fooService #{fooService}
Defined the subclass bean that had the null pointer as a spring bean and injecting the property via the spring beans xml file.
Ironically, I am able to place the following code in the constructor of the FooBean abstract class and the dao is injected (but I don't want to use this code, I want spring to inject it):
WebApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext(getRequest().getServletContext());
dao = (FooService)ctx.getBean("fooService");
