Fetching data from facebook by Spring social - facebook

Question

i am using Spring social for fetching the data from facebook but encountering a weird error
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'homeController': Injection of autowired dependencies failed; nested exception is
org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.social.facebook.api.Facebook
org.springframework.social.quickstart.HomeController.facebook; nested exception is
org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type
[org.springframework.social.facebook.api.Facebook] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}
I believe facebook object will come from the api. I don't have to define it manually.
my web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_5.xsd">
<display-name>Spring Social Facebook</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/forms/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
rootcontext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<!-- Root Context: defines shared resources visible to all other web components -->
<!-- Enable #Annotation-drive bean configuration -->
<context:annotation-config />
<context:component-scan base-package="org" />
<!-- Configures External Property Resolution -->
<import resource="properties.xml" />
<!-- Configures Shared Data Access Resources -->
<!-- <import resource="data.xml" /> -->
<!-- Configures Spring Social -->
<bean class="org.springframework.social.quickstart.config.SocialConfig" />
</beans>
servlet-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:beans="http://www.springframework.org/schema/beans"
xsi:schemaLocation="
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<!-- Enables the Spring MVC #Controller programming model -->
<annotation-driven />
<!-- Resolves views selected for rendering by #Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
</beans:beans>
In my controller I am autowiring my Facebook obj.
#Controller
public class HomeController {
#Autowired
private Facebook facebook;
/*
#Inject
public HomeController(Facebook facebook) {
this.facebook = facebook;
}*/
#RequestMapping(value = "/fb", method = RequestMethod.GET)
public String home(Model model) {
System.out.println("Inside home method");
List<Reference> friends = facebook.friendOperations().getFriends();
model.addAttribute("friends", friends);
return "home";
}
}

Answer 1

taken from spring social quickstart example. Probably you cant inject it by yourself, instead you have to use factory-like method:
#Bean
#Scope(value="request", proxyMode=ScopedProxyMode.INTERFACES)
public Facebook facebook() {
return connectionRepository().getPrimaryConnection(Facebook.class).getApi();
}
it needs other dependencies, no point to copy-paste them all here. Take a look at:
https://github.com/spring-projects/spring-social-samples/blob/master/spring-social-quickstart/src/main/java/org/springframework/social/quickstart/config/SocialConfig.java