@Uses in service mixin

[michaelp]

Hi guys, 

Is it proper with Qi4j to have a @Uses annotation in a Service mixin, and if yes, how can one inject the object into the mixin instance at runtime?

More specifically, here's an example sketch:

@Mixins{AbcService.Mixin.class}

interface AbcService implements Abc, ServiceComposite {

    ...

    class Mixin implements Abc {

        

        @Uses

        SomeInterface obj;

        

        ...

    }

}

Then:

ServiceReference<AbcService> serviceRef = module.findService(AbsService.class);

AbcService abcService = serviceRef.get();

At this point, how can I inject a SomeInterface object into the abcService instance?

TransientBuilder.use() is not applicable to this case, or is it in some way?

Best regards,

Michael

[Niclas Hedhman]

Well, the reason use() didn't exist in Services is because they are not really that transient. They are declared in bootstrapping and activated on usage, and no injection point as with the builders.

I think you could declare Imported Services instead of regular services to accomplish a similar result. Sometimes Meta Info can work, since services are singletons (per declaration).

If you explained the usecase, perhaps I could give better ideas (or even find that we need a new feature).

Cheers

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Niclas Hedhman, Software Developer
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