Dependency Injection in Spring MVC - spring

Question

I would like to initialize my MessageSource field with Dependency Injection in Spring. This is what have so far:
package com.ucmas.cms.view;
#Component
public class PdfRevenueReportView extends AbstractPdfView {
...
#Autowired
private MessageSource messageSource;
...
}
mvc-dispatcher-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="sec://www.springframework.org/schema/mvc"
xmlns:beans="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.1.xsd">
<context:component-scan base-package="com.ucmas.cms.controller,com.ucmas.cms.view" />
<!-- Enables the Spring MVC #Controller programming model -->
<mvc:annotation-driven />
...
<beans:bean class="org.springframework.web.servlet.view.XmlViewResolver">
<beans:property name="location" value="/WEB-INF/spring-pdf-views.xml" />
<beans:property name="order" value="0" />
</beans:bean>
</beans:beans>
I have defined my messageSource in root-context.xml
<bean id="messageSource"
class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
<property name="basename" value="classpath:messages" />
<property name="defaultEncoding" value="UTF-8" />
</bean>
My controller classes work fine, however I am unable to inject the messageSource field in the PdfRevenueReportView class. What should I do to make the DI works ?
UPDATED
I define the view in xml as follow
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
<bean id="PdfRevenueSummary" class="com.ucmas.cms.view.PdfRevenueReportView" />
</beans>
Perhaps this is why the messageSource is always null ?

Answer 1

I got it working by updating my spring-pdf-views.xml into
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">
<bean id="PdfRevenueSummary" class="com.ucmas.cms.view.PdfRevenueReportView">
<property name="messageSource" ref="messageSource"/>
</bean>
</beans>
However this requires me to generate setter and getter for messageSource field and removing the #Autowired annotation.

Answer 2

In your dispatcher servlets configuration you need to create a bean for the message source.
<bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="directory/with/messagesource"/>
</bean>
Also ensure that the messages directory is on the classpath.

Answer 3

You are annotating messageSource with Autowired. This might not work when your bean messageSource whilst is an interface of MessageResource, is really the implementation ResourceBundleMessageSource.
I think your DI would have worked if you used #Resource instead as it is name based:
#Resource
private MessageSource messageSource;