Injecting value into either a custom discovery provider - either provider or service?

[kjq]

Quick, hopefully simple, question.

I have a custom provider, based off of the Kubernetes discovery provider, that is being used in Quarkus - I would like to inject some custom values into either but I do not seem capable of doing it.

It does not fail on the annotation @ConfigProperty but the value is always null.

Am I missing something?

[cescoffier]

Hello,

In Quarkus 3, the service discovery providers are cdi beans and so can use @Inject to retrieve config value. Note that only the provider is, not the service discovery itself.

For Quarkus 2, you would need to use the CDI API (CDI.current().select(...)).

[kjq]

Odd, I felt dumb asking because that is what I thought but at least when I use @ConfigProperty it does not seem to work. Ill try injecting something else and check again just to make sure.

[kjq]

Weird, @Inject value is always null when used inside my discovery or provider implementation. I dont think it is a bug just something I am doing wrong, maybe with injecting Stork using the @Provider in a config?

Attached is a crude reproducer with a couple of System.out's. In both cases the injected properties are null. I just put a breakpoint in each of them and inspected the injected value.

Other than that everything seems to be working as its supposed to.

code-with-quarkus.zip

[kjq]

I just realized what you said about the discovery not being a CDI bean. Still, my provider is not recognizing anything i inject into it.

[cescoffier]

To be a bean, the providers must be annotated with @ApplicationScoped (see http://smallrye.io/smallrye-stork/2.3.0/service-discovery/custom-service-discovery/#implementing-a-service-discovery-provider).

Then, pass the bean to the ServiceDiscovery implementation constructor.

[kjq]

Ugh, how did I miss that? I think I would look at the generated ProviderLoader and was assuming the provider was scoped. Thanks!