<context-param>
   <param-name>guice-modules</param-name>
   <param-value>
     org.apache.shindig.common.PropertiesModule:
     org.apache.shindig.gadgets.DefaultGuiceModule:
     org.apache.shindig.social.core.config.SocialApiGuiceModule:
     org.apache.shindig.social.sample.SampleModule:
     org.apache.shindig.gadgets.oauth.OAuthModule:
<!-- Start OAuth2 Modules -->
     org.apache.shindig.gadgets.oauth2.OAuth2Module:
     org.apache.shindig.gadgets.oauth2.sample.OAuth2MessageModule:
     org.apache.shindig.gadgets.oauth2.handler.sample.OAuth2HandlerModule:
     org.apache.shindig.gadgets.oauth2.persistence.sample.OAuth2PersistenceModule:   Â
<!-- End OAuth2 Modules -->
     org.apache.shindig.common.cache.ehcache.EhCacheModule:
     org.apache.shindig.sample.shiro.ShiroGuiceModule:
     org.apache.shindig.sample.container.SampleContainerGuiceModule:
     org.apache.shindig.extras.ShindigExtrasGuiceModule
   </param-value>
 </context-param>
<!-- OAuth2 callback -->
 <servlet>
   <servlet-name>oauth2callback</servlet-name>
   <servlet-class>
     org.apache.shindig.gadgets.servlet.OAuth2CallbackServlet
   </servlet-class>
 </servlet>