On May 18, 2009, at 7:11 PM, Fabio Mancinelli wrote:
>
> On May 18, 2009, at 6:52 PM, Vincent Massol wrote:
>
>>>
>>
>> Great but why do you need the FQN as role hint?
>>
>> Since you lookup all components implementing the XWikiRestComponent
>> role you have access to all FQN.
>>
>
> At registration time, I have to tell Restlet/JAXRS what are the
> java.lang.Classes that implement JAXRS entities.
> So, at startup, I basically do this for registering components once
> for all:
>
> List<XWikiRestComponent> components =
> componentManager.lookupList(XWikiRestComponent.class);
> for (XWikiRestComponent component : components) {
> jaxRsClassed.add(component.getClass())
> }
BTW you can get the list injected automatically with:
@Requirement(role = XWikiRestComponent.class)
List<XWikiRestComponent> components;
Note that obviously this means no hot deploy. For that you need to
wait for CM events that I plan to add soon.
> During normal operation, Restlet/JAXRS starts calling the object
> factory through the method
>
> public <T> T getInstance(Class<T> clazz) throws InstantiateException
>
> whenever it needs an instance of a given class.
>
> So, in order to lookup a component, I just have the class name to be
> used as a way for identifying it.
> What I do is:
>
> componentManager.lookup(XWikiRestComponent.class, clazz.getName());
>
> That's the reason why the hint if the FQN of the class.
>
> If I don't use the FQN I would have to create a mapping class-
>> symbolic name (hint) at startup using the lookupMap method.
> Doable but more complicated, so I just delegated the responsibility to
> the programmer to declare things in the right way :)
hmm so there's still something not quite right since we have several
instances of the same component instantiated in the system: the ones
from:
List<XWikiRestComponent> components =
componentManager.lookupList(XWikiRestComponent.class);
and the ones from
public <T> T getInstance(Class<T> clazz) throws InstantiateException
In the first case all you need is actually the class name and not the
object, right?
Thanks
-Vincent
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