On Aug 10, 2009, at 1:31 PM, Sergiu Dumitriu wrote:
Vincent Massol wrote:
On Aug 10, 2009, at 12:41 PM, Sergiu Dumitriu wrote:
Anamaria Stoica wrote:
It looks like you can bind an instance to type in Guice. This is done either with Instance Bindings, @Provides Methods or Provider Bindings, depending on the complexity of the class. (http://code.google.com/p/google-guice/wiki/Bindings)
All bindings are defined in a class that extends AbstractModule, this would be XWSocialModule in my code ( https://svn.xwiki.org/svnroot/xwiki/sandbox/gsoc/opensocial/xwiki-social-ope...) .
These modules are then passed as arguments to Guice.createInjector(), which builds the injector. In my application, the injector is build by GuiceServletContextListener ( http://svn.apache.org/repos/asf/incubator/shindig/trunk/java/common/src/main...) This servlet takes the context parameters defined in my web.xml; these are:
<context-param> <param-name>guice-modules</param-name> <param-value> org.apache.shindig.common.PropertiesModule: org.apache.shindig.gadgets.DefaultGuiceModule: org.apache.shindig.gadgets.oauth.OAuthModule: org.apache.shindig.common.cache.ehcache.EhCacheModule: org.xwiki.opensocial.social.XWSocialModule </param-value> </context-param>
<listener>
<listener- class>org.xwiki.container.servlet.XWikiServletContextListener</ listener-class> </listener>
Now, all I need to do is bind the instance of PersonServiceXW after it has been initialized by XWiki's Component Manager. The binding will be done in XWSocialModule, using one of the instance binding methods (Instance Bindings, @Provides Methods or Provider Bindings).
My questions are: 1. How do I make sure PersonServiceXW has been initialized already by the XWiki CM before binding it for Guice ? List GuiceServletContextListener AFTER XWikiServletContextListener in web.xml. The servlet spec specifies that listeners are called in the order they are encountered in web.xml, and XWikiServletContextListener is the one that starts our component manager.
For the future: we should not use other servlet context listener other than the xwiki one. We need it to init the CM but once this is done everything else should be done with it.
So ideally you should instead create an EventListener that listen for the application start event and initizalize shindig in there rather than use an environment-specific servlet context listener.
I'm not sure, but I think that Shindig works this way, there's nothing we can do about it.
Just checked http://svn.apache.org/repos/asf/incubator/shindig/trunk/java/common/src/main... It doesn't do much, just init Guice in a few lines. Thanks -Vincent
-Vincent
2. How do I get the initialized PersonServiceXW instance from XWSocialModule? com.xpn.xwiki.web.Utils.getComponent(PersonServiceXW.class)