There isn't. In fact we have a callback that you can use for exactly
this sort of purpose:
https://hk2.java.net/2.2.0-b25/apidocs/org/glassfish/hk2/api/JustInTimeInjectionResolver.html
You can write a simple JIT resolver that does exactly what you are
asking for.
This will not work for a direct lookup, so you may need something else
for that case. It'd be fairly easy to write a small wrapper around
lookup that would try to add the given class if the underlying service
locator could not find the service.
On 12/5/2013 1:09 PM, cowwoc wrote:
> John,
>
> I just had a thought: why do we need hk2-inhabitant-generator at all?
> When someone tries to inject a class and a binding is not found,
> couldn't HK2 automatically add a binding and retry the operation if
> the class is annotated with @Service? Meaning, what prevents you from
> adding the binding on-the-fly at runtime?
>
> Thanks,
> Gili
>
> On 04/12/2013 6:17 PM, cowwoc wrote:
>> Thank you. Filed https://java.net/jira/browse/HK2-165
>>
>> Gili
>>
>> On 04/12/2013 5:58 PM, John Wells wrote:
>>> To use @Service you must
>>>
>>> a) run the hk2-inhabitant-generator as part of your build in order
>>> to produce the META-INF/hk2-locator/default file. You can look at
>>> this file to see if it looks reasonable (it should have your
>>> services in there)
>>>
>>> b) Ensure that when you boot hk2 you tell it to read those files in
>>> (it does not do this automatically). The easiest way to do this is
>>> with this:
>>>
>>> https://hk2.java.net/2.2.0-b25/apidocs/org/glassfish/hk2/utilities/ServiceLocatorUtilities.html#createAndPopulateServiceLocator%28%29
>>>
>>>
>>> I do not currently monitor stackOverflow for hk2, but I will now!
>>>
>>> On 12/4/2013 5:37 PM, cowwoc wrote:
>>>> Hi,
>>>>
>>>> I've got something along the lines of:
>>>>
>>>> @Service
>>>> public class TestClass
>>>> {
>>>> @Inject
>>>> public TestClass()
>>>> {
>>>> }
>>>> }
>>>>
>>>> public class MyApplication extends ResourceConfig
>>>> {
>>>> @Inject
>>>> public MyApplication(ServiceLocator serviceLocator)
>>>> {
>>>> TestClass test = serviceLocator.getService(TestClass.class);
>>>> }
>>>> }
>>>>
>>>> but serviceLocator.getService(TestClass.class) returns null. What
>>>> am I missing? Isn't HK2 supposed to auto-bind @Service-annotated
>>>> classes somehow?
>>>>
>>>> PS: Do you monitor the "hk2" tag on Stackoverflow? I think it's a
>>>> more efficient way of handling recurring questions.
>>>>
>>>> Thanks,
>>>> Gili
>>>
>>
>