Hi Anamaria, On Aug 9, 2009, at 2:39 AM, Anamaria Stoica wrote:
Hi,
In order to integrate Shindig with the XWiki datastore, 4 interfaces have to be implemented: PersonService, AppDataService, ActivityService and MessagesService (javadocs here [0]). To this end, I have created the xwiki-social-opensocial module [1].
While implementing PersonService (PersonServiceXW - [2]), I have encountered the following problem: As I needed to access the datastore, I also made PersonServiceXW a XWiki Component in order to gain access to the DocumentAccessBridge Component. BUT, here is the problem, the DocumentAccessBridge never gets initialized and at runtime is null.
The reason this might happen, as Sergiu suggested, is that Shindig uses Guice to bind the services implementations in its code, thus the PersonServiceXW component never gets to be registered with XWiki's Component Manager.
There's no magic. If the component is registered in components.txt and if you're looking it up to access it the DAB will get set properly. So it's just that you're no looking it up and there's no way it can be injected with dependencies.
My question is how do I get data in and out XWiki's datastore from the PersonService implementation, if I cannot use the DocumentAccessBridge this way?
Why couldn't you use it?
Can it be registered to the Component Manager somehow, or is there a completely different way this could be achieved?
You're not provided enough information so that we can help you. From what I read the solution is extra simple: just look up the component using XWiki's component manager and you're done. Now the only question is what shinding requires. Does it accept an instance of PersonService or does it take a class. In other words does it perform the instantiation itself (the new) or can you pass to it an already instantiated object? *IF* (and if) it controls the instantiation then you need to do it differently: - knowing guice you can configure if to inject an instance instead of a class so that might be a direction to look into - otherwise simply make you person service impl a standard POJO and have a setDAB method that you call after it's been instantiated by shindig somehow. [snip] Thanks -Vincent